AI-generatedNew Haven at a glance
- Best time
- Jul – Aug
- Warmest month
- Jul · 27°
- Warmest sea
- Aug · 23.2°
- Sunshine a year
- 2,270 h
- Rain a year
- 1,197 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 18 m
Climate in New Haven
New Haven has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 27 °C, while January is the coolest at 3 °C. With around 2,270 hours of sunshine a year, New Haven is sunny; July is the sunniest month with 8.3 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Poor
Best time to visit: July – August
October is the peak of the hurricane season
Good forSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 12°
- Midday, 13:00: about 17°
- Afternoon, 16:00: about 16°
- Evening, 20:00: about 14°
- Night, 23:00: about 13°
07:0218:13
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:45–07:39 · evening 17:35–18:30
- Blue hour
- Morning 06:34–06:45 · evening 18:30–18:40
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in New Haven in October?
In October, New Haven is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 18.2 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 119 mm in total. All in all, October is not an ideal month for a holiday in New Haven.
More details for October
- Daylight
- 11 h 11 min07:02 – 18:13
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 52 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %17 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 20 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in New Haven
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 17.1 – 19.1 °C
Swimming season: Jul – Sep
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in New Haven ranges from 2.2 °C in February to 23.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from July to September.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From October to January the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 22.2 and 24.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 4.0° | 2.3° | 5.8° | cold |
| FebruaryFeb | 2.2° | 0.5° | 4.1° | cold |
| MarchMar | 3.3° | 1.6° | 5.0° | cold |
| AprilApr | 7.0° | 5.3° | 8.6° | cold |
| MayMay | 12.4° | 10.9° | 14.1° | cold |
| JuneJun | 18.0° | 16.3° | 19.3° | fresh |
| JulyJul | 22.1° | 20.6° | 23.7° | refreshing |
| AugustAug | 23.2° | 22.2° | 24.4° | pleasant |
| SeptemberSep | 21.9° | 20.8° | 23.3° | refreshing |
| OctoberOct | 18.2° | 17.1° | 19.1° | fresh |
| NovemberNov | 13.0° | 12.2° | 14.0° | cold |
| DecemberDec | 7.9° | 6.8° | 9.4° | cold |
Sunshine hours in New Haven
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.6 of 11.2 hours of daylight in New Haven, 50 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in New Haven
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 35 min
- Fair skin
- about 45 min
- Light brown skin
- about 60 min
- Olive skin
- about 80 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in New Haven: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, New Haven has about 10 rainy days with 119 mm of rain in total.
Wind and clouds in New Haven
How breezy and how cloudy New Haven is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in New Haven typically peaks at 24 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: Sep – Jun.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 52 % of the sky over New Haven: variable cloud, with about 5.6 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in New Haven
How often the day gets hot in New Haven (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, New Haven has about 0 hot days, with an average daytime high of 17 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in New Haven
Snow is possible in New Haven, but no month makes it likely: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in New Haven.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in New Haven
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- muggy month (10+ muggy days)
CoolOctober: nights around 11°. A duvet at night and a jumper for the evening. Muggy on about 1 days (dew point 18 °C or more).
The coolest nights are in January (−3°), the warmest in July (20°). Tropical nights of 20 °C and more are the rule from July to August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in June and in September. Nights fall below 8 °C on average from November to April, so the room should be heated. It is muggy (dew point 18 °C or more) on about 48 days a year, mostly from July to August.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 17 | 3° | −3° | 4.0° | 4.6 h | 10 | 97 |
| FebruaryFeb | 20 | 4° | −3° | 2.2° | 5.3 h | 10 | 89 |
| MarchMar | 22 | 8° | 0° | 3.3° | 6.2 h | 10 | 115 |
| AprilApr | 23 | 13° | 5° | 7.0° | 6.9 h | 11 | 102 |
| MayMay | 24 | 18° | 11° | 12.4° | 7.1 h | 11 | 93 |
| JuneJun | 57 | 24° | 16° | 18.0° | 7.8 h | 10 | 91 |
| JulyJul | 83 | 27° | 20° | 22.1° | 8.3 h | 10 | 88 |
| AugustAug | 84 | 26° | 20° | 23.2° | 7.6 h | 10 | 92 |
| SeptemberSep | 64 | 23° | 17° | 21.9° | 6.3 h | 9 | 100 |
| OctoberOct | 25 | 17° | 11° | 18.2° | 5.6 h | 10 | 119 |
| NovemberNov | 19 | 11° | 5° | 13.0° | 4.8 h | 9 | 88 |
| DecemberDec | 14 | 6° | 0° | 7.9° | 4.1 h | 11 | 124 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
41.31° N, 72.93° W · 18 m · America/New_York
Best time to visit New Haven
The best time to visit New Haven is from July to August. For a beach holiday with the sea above 21 °C, go from July to August. For sightseeing, day trips and hiking, conditions are most comfortable from May to October. The wettest month is December with 124 mm of precipitation.
New Haven through the seasons
How the weather changes over the seasons, with averages for each.
New Haven in spring
Mar – May
Poor
- 8–18 °C by day
- Sea 8 °C
- 7 h of sun a day
- 32 rainy days in all
New Haven in summer
Jun – Aug
Good
- 24–27 °C by day
- Sea 21 °C
- 8 h of sun a day
- 29 rainy days in all
New Haven in autumn
Sep – Nov
Poor
- 11–23 °C by day
- Sea 18 °C
- 6 h of sun a day
- 27 rainy days in all
New Haven in winter
Dec – Feb
Poor
- 3–6 °C by day
- Sea 5 °C
- 5 h of sun a day
- 30 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in New Haven for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Compare two months in New Haven
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in New Haven: score 84 against 25. In August, days are 9 °C warmer than in October. The sea is 5 °C warmer in August. The sun shines 2 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Weather score | 25 | 84better |
| Day high | 17° | 26° |
| Night low | 11° | 20° |
| Sea | 18.2° | 23.2° |
| Sunshine | 5.6 h | 7.6 hbetter |
| Rainy days | 10 | 10 |
| Rainfall | 119 mm | 92 mmbetter |
| Muggy days | 1better | 15 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Jul – Aug
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Oct
15–28 °C and not too much rain
Snow
Dec – Mar
Snow on 2 or more days
New Haven month by month
The typical weather for every month at a glance.
17January3° · Sea 4° · 5 h
In January, New Haven is freezing cold: daytime highs average 3 °C, and nights often drop below freezing (−3 °C). The sea averages 4.0 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Precipitation, often as snow, falls on about 10 days, totalling 97 mm. Snow falls on about 3 days. All in all, January is not an ideal month for a holiday in New Haven.
New Haven in January20February4° · Sea 2° · 5 h
In February, New Haven is cold: daytime highs average 4 °C, and nights often drop below freezing (−3 °C). The sea averages 2.2 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Precipitation, often as snow, falls on about 10 days, totalling 89 mm. Snow falls on about 3 days. All in all, February is not an ideal month for a holiday in New Haven.
New Haven in February22March8° · Sea 3° · 6 h
In March, New Haven is cold: daytime highs average 8 °C, and nights cool down to about 0 °C. The sea averages 3.3 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 115 mm in total. Snow falls on about 3 days. All in all, March is not an ideal month for a holiday in New Haven.
New Haven in March23April13° · Sea 7° · 7 h
In April, New Haven is cool: daytime highs average 13 °C, and nights cool down to about 5 °C. The sea averages 7.0 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 102 mm in total. All in all, April is not an ideal month for a holiday in New Haven.
New Haven in April24May18° · Sea 12° · 7 h
In May, New Haven is mild: daytime highs average 18 °C, and nights cool down to about 11 °C. The sea averages 12.4 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 93 mm in total. All in all, May is not an ideal month for a holiday in New Haven.
New Haven in May57June24° · Sea 18° · 8 h
In June, New Haven is warm: daytime highs average 24 °C, and nights cool down to about 16 °C. The sea averages 18.0 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 91 mm in total. All in all, June is a so-so month for a holiday in New Haven.
New Haven in June83July27° · Sea 22° · 8 h
In July, New Haven is hot: daytime highs average 27 °C, and even at night it stays warm at around 20 °C. The sea averages 22.1 °C – refreshing for a swim. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 88 mm in total. The air is often humid and muggy. All in all, July is an excellent month for a holiday in New Haven.
New Haven in July84August26° · Sea 23° · 8 h
In August, New Haven is warm: daytime highs average 26 °C, and nights cool down to about 20 °C. The sea averages 23.2 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 92 mm in total. The air is often humid and muggy. All in all, August is an excellent month for a holiday in New Haven.
New Haven in August64September23° · Sea 22° · 6 h
In September, New Haven is warm: daytime highs average 23 °C, and nights cool down to about 17 °C. The sea averages 21.9 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain falls on about 9 days, adding up to 100 mm. All in all, September is a good month for a holiday in New Haven.
New Haven in September25October17° · Sea 18° · 6 h
In October, New Haven is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 18.2 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 119 mm in total. All in all, October is not an ideal month for a holiday in New Haven.
New Haven in October19November11° · Sea 13° · 5 h
In November, New Haven is cool: daytime highs average 11 °C, and nights cool down to about 5 °C. The sea averages 13.0 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain falls on about 9 days, adding up to 88 mm. All in all, November is not an ideal month for a holiday in New Haven.
New Haven in November14December6° · Sea 8° · 4 h
In December, New Haven is cold: daytime highs average 6 °C, and nights cool down to about 0 °C. The sea averages 7.9 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 124 mm in total. Snow falls on about 2 days. All in all, December is not an ideal month for a holiday in New Haven.
New Haven in DecemberNew Haven compared
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New Haven vs. Montauk
In October the holiday weather in New Haven and Montauk is about equally good (score 25 vs. 21). During the day Montauk is 1 °C cooler than New Haven. The sea in Montauk is 1 °C cooler.
| in October | New Haven | Montauk |
|---|---|---|
| Holiday score | 25 | 21 |
| Daytime high | 17° | 16° |
| Sea | 18° | 17° |
| Sunshine | 6 h | 6 h |
| Rainy days | 10 | 10 |
| Best time | Jul – Aug | Jul – Aug |
Through the year
USA in October: the best places
In October, New Haven ranks 23 among the 31 nearest destinations in this country.
- Raleigh22°84
- 2Richmond21°82
- 3Washington20°19°81
- 4Philadelphia19°18°79
- 5Baltimore19°18°79
- 6New York18°18°77
- 7Providence17°17°70
- 8Pittsburgh18°69
- 23New HavenThis page17°18°25
Planning a trip to New Haven
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
New Haven in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
New Haven has its best school-holiday weather during the summer holidays (score 84) and its weakest during the Christmas holidays (score 16).
- 23
Easter holidays
Mar – Apr
Poor
- 12 °C by day
- Sea 6 °C
- 6.7 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 31
May half-term
May – Jun
Poor
- 19 °C by day
- Sea 14 °C
- 7.2 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 84
Summer holidays
Jul – Aug
ExcellentBest holidays
- 27 °C by day
- Sea 23 °C
- 7.8 h of sun a day
- 10 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
Keep in mind: Storm season
- 25
October half-term
Oct
Poor
- 17 °C by day
- Sea 18 °C
- 5.6 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
Keep in mind: Storm season
- 16
Christmas holidays
Dec – Jan
Poor
- 4 °C by day
- Sea 6 °C
- 4.4 h of sun a day
- 10 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 7 h 5 min
- Distance
- 5,440 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
New Haven lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about New Haven
When is the best time to visit New Haven?
The best time to visit New Haven is from July to August. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in New Haven?
The sea temperature in New Haven ranges from 2.2 °C in February to 23.2 °C in August. It is warm enough for a comfortable swim (20 °C and more) from July to September.
Can you swim in New Haven in October?
Only if you don't mind cold water: in October the sea averages just 18.2 °C. Comfortable swimming is possible from July to September.
What is the warmest month in New Haven?
July is the warmest month, with average highs of 27 °C and nights around 20 °C. January is the coolest month at 3 °C.
When does it rain most in New Haven?
The wettest month is December with 124 mm of precipitation. The driest month is July with 88 mm.
How many hours of sunshine does New Haven get?
New Haven gets around 2,270 hours of sunshine a year. The sunniest month is July with 8.3 hours a day; in December there are 4.1 hours a day.
What time zone is New Haven in?
New Haven uses the time zone America/New_York: UTC−5 in January and UTC−4 in July.
How long is the flight from London to New Haven?
A nonstop flight from London to New Haven takes about 7 h 5 min, for a straight-line distance of about 5,440 km.
When is hurricane season in New Haven?
New Haven lies in an area that Atlantic hurricanes can reach. The hurricane season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for New Haven?
New Haven has its best school-holiday weather during the summer holidays (score 84) and its weakest during the Christmas holidays (score 16). Holiday ratings (0–100): Easter holidays 23, May half-term 31, Summer holidays 84, October half-term 25, Christmas holidays 16.
Near New Haven
Other destinations close by.
Places with a climate like New Haven
Destinations whose weather through the year is closest to New Haven's – good alternatives.