AI-generatedGreen Bay at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 28°
- Sunshine a year
- 2,160 h
- Rain a year
- 798 mm
- Climate
- Continental
- Time zone
- UTC−6 / UTC−5
- Elevation
- 180 m
Climate in Green Bay
Green Bay has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 28 °C, while January is the coolest at −3 °C. With around 2,160 hours of sunshine a year, Green Bay is moderately sunny; July is the sunniest month with 8.9 hours a day.
Holiday weather through the year
Best time to visit Green Bay
The best time to visit Green Bay is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. The wettest month is June with 97 mm of precipitation.
Green Bay through the seasons
How the weather changes over the seasons, with averages for each.
Green Bay in spring
Mar – May
Fair
- 5–20 °C by day
- 6.6 h of sun a day
- 32 rainy days in all
Green Bay in summer
Jun – Aug
Excellent
- 25–28 °C by day
- 8.3 h of sun a day
- 33 rainy days in all
Green Bay in autumn
Sep – Nov
Fair
- 7–23 °C by day
- 5.0 h of sun a day
- 26 rainy days in all
Green Bay in winter
Dec – Feb
Poor
- −3–0 °C by day
- 3.8 h of sun a day
- 22 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Snow
Dec – Apr
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Green Bay for you.
Your best months: June, September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
A typical day in October
- Morning, 08:00: about 6°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 10°
- Night, 23:00: about 8°
07:0618:10
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:48–07:45 · evening 17:30–18:28
- Blue hour
- Morning 06:36–06:48 · evening 18:28–18:39
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.
October in Green Bay compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 18° at the start of the month to 11° at the end. The days get 1.4 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 18° | 11° |
| Night-time low | 7° | 2° |
| Daylight | 11.8 h | 10.3 h |
What is the weather like in Green Bay in October?
In October, Green Bay is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. Expect around 4.8 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 70 mm in total. All in all, October is a so-so month for a holiday in Green Bay.
More details for October
- Daylight
- 11 h 4 min07:06 – 18:10
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 59 %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−5offset from UTC
How the score comes together
- Temperatureweight 50 %69 %
- Sunshineweight 20 %30 %
- Few rainy daysweight 30 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Green Bay
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 Green Bay: score 83 against 59. In August, days are 11 °C warmer than in October. The sun shines 3 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Holiday weather score | 59 | 83better |
| Daytime high | 15° | 26° |
| Night-time low | 5° | 15° |
| Sunshine | 4.8 h | 7.6 hbetter |
| Rainy days | 10 | 10 |
| Rainfall | 70 mmbetter | 83 mm |
| Muggy days | 0better | 8 |
Based on the climate averages 1996–2025.
Green Bay month by month
The typical weather for every month at a glance.
25January−3° · 3.5 h
In January, Green Bay is bitterly cold: daytime highs average −3 °C, and nights often drop below freezing (−11 °C). The sun is scarce, with only about 3.5 hours a day. Precipitation falls on about 7 days, totalling 37 mm; on about 5 of them it snows. All in all, January is not an ideal month for a holiday in Green Bay.
Green Bay in January30February−1° · 4.8 h
In February, Green Bay is bitterly cold: daytime highs average −1 °C, and nights often drop below freezing (−10 °C). Expect around 4.8 hours of sunshine a day. Precipitation falls on about 7 days, totalling 35 mm; on about 5 of them it snows. All in all, February is not an ideal month for a holiday in Green Bay.
Green Bay in February29March5° · 5.8 h
In March, Green Bay is cold: daytime highs average 5 °C, and nights often drop below freezing (−4 °C). Expect around 5.8 hours of sunshine a day. Rain falls on about 9 days, adding up to 61 mm. Snow falls on about 4 days. All in all, March is not an ideal month for a holiday in Green Bay.
Green Bay in March47April13° · 6.5 h
In April, Green Bay is cool: daytime highs average 13 °C, and nights cool down to about 2 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 12 rainy days and 83 mm in total. Snow falls on about 3 days. All in all, April is a so-so month for a holiday in Green Bay.
Green Bay in April78May20° · 7.4 h
In May, Green Bay is mild: daytime highs average 20 °C, and nights cool down to about 8 °C. The sun shines for around 7.4 hours a day. Rain is frequent, with about 12 rainy days and 89 mm in total. All in all, May is a good month for a holiday in Green Bay.
Green Bay in May81June25° · 8.3 h
In June, Green Bay is warm: daytime highs average 25 °C, and nights cool down to about 14 °C. The sun shines for around 8.3 hours a day. Rain is frequent, with about 12 rainy days and 97 mm in total. All in all, June is an excellent month for a holiday in Green Bay.
Green Bay in June81July28° · 8.9 h
In July, Green Bay is hot: daytime highs average 28 °C, and nights cool down to about 16 °C. The sun shines for around 8.9 hours a day. Rain is frequent, with about 11 rainy days and 85 mm in total. On about 8 days the thermometer climbs to 30 °C or more. All in all, July is an excellent month for a holiday in Green Bay.
Green Bay in July83August26° · 7.6 h
In August, Green Bay is warm: daytime highs average 26 °C, and nights cool down to about 15 °C. The sun shines for around 7.6 hours a day. Rain is frequent, with about 10 rainy days and 83 mm in total. All in all, August is an excellent month for a holiday in Green Bay.
Green Bay in August81September23° · 6.4 h
In September, Green Bay is warm: daytime highs average 23 °C, and nights cool down to about 11 °C. Expect around 6.4 hours of sunshine a day. Rain falls on about 9 days, adding up to 63 mm. All in all, September is an excellent month for a holiday in Green Bay.
Green Bay in September59October15° · 4.8 h
In October, Green Bay is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. Expect around 4.8 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 70 mm in total. All in all, October is a so-so month for a holiday in Green Bay.
Green Bay in October25November7° · 3.8 h
In November, Green Bay is cold: daytime highs average 7 °C, and nights often drop below freezing (−1 °C). The sun is scarce, with only about 3.8 hours a day. Rain falls on about 8 days, adding up to 49 mm. All in all, November is not an ideal month for a holiday in Green Bay.
Green Bay in November22December0° · 3.1 h
In December, Green Bay is bitterly cold: daytime highs average 0 °C, and nights often drop below freezing (−7 °C). The sun is scarce, with only about 3.1 hours a day. Precipitation falls on about 8 days, totalling 47 mm; on about 5 of them it snows. All in all, December is not an ideal month for a holiday in Green Bay.
Green Bay in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Green Bay
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°
ColdOctober: nights around 5°. The room should be heated.
The coolest nights are in January (−11°), the warmest in July (16°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from October to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 25 | −3° | −11° | 3.5 h | 7 | 37 |
| FebruaryFeb | 30 | −1° | −10° | 4.8 h | 7 | 35 |
| MarchMar | 29 | 5° | −4° | 5.8 h | 9 | 61 |
| AprilApr | 47 | 13° | 2° | 6.5 h | 12 | 83 |
| MayMay | 78 | 20° | 8° | 7.4 h | 12 | 89 |
| JuneJun | 81 | 25° | 14° | 8.3 h | 12 | 97 |
| JulyJul | 81 | 28° | 16° | 8.9 h | 11 | 85 |
| AugustAug | 83 | 26° | 15° | 7.6 h | 10 | 83 |
| SeptemberSep | 81 | 23° | 11° | 6.4 h | 9 | 63 |
| OctoberOct | 59 | 15° | 5° | 4.8 h | 10 | 70 |
| NovemberNov | 25 | 7° | −1° | 3.8 h | 8 | 49 |
| DecemberDec | 22 | 0° | −7° | 3.1 h | 8 | 47 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), 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
44.52° N, 88.02° W · 180 m · America/Chicago
Sunshine
Sunshine hours in Green Bay
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 4.8 of 11.1 hours of daylight in Green Bay, 43 % of the daylight hours.
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.
Rain
Rain in Green Bay: 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, Green Bay has about 10 rainy days with 70 mm of rain in total.
UV index
UV index in Green Bay
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 40 min
- Fair skin
- about 55 min
- Light brown skin
- about 75 min
- Olive skin
- about 95 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, 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.
Wind & clouds
Wind and clouds in Green Bay
How breezy and how cloudy Green Bay 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 Green Bay typically peaks at 20 km/h during the day: Beaufort 4, moderate breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 59 % of the sky over Green Bay: variable cloud, with about 4.8 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 & humidity
Heat and humidity in Green Bay
How often the day gets hot in Green Bay (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, Green Bay has about 0 hot days, with an average daytime high of 15 °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
Snow in Green Bay
When Green Bay is likely to be white: 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 Green Bay.
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.
Planning a trip to Green Bay
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Green Bay 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.
Green Bay has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 24).
- 42
Easter holidays
Mar – Apr
Fair
- 10 °C by day
- 6.3 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 79
May half-term
May – Jun
Good
- 21 °C by day
- 7.6 h of sun a day
- 12 rainy days a month
Good for: Sightseeing & walks
- 82
Summer holidays
Jul – Aug
ExcellentBest holidays
- 27 °C by day
- 8.1 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 59
October half-term
Oct
Fair
- 15 °C by day
- 4.8 h of sun a day
- 10 rainy days a month
- 24
Christmas holidays
Dec – Jan
Poor
- −2 °C by day
- 3.3 h of sun a day
- 8 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 7 h 55 min
- Distance
- 6,160 km
- Time zone
- UTC−5
- Jet lag
- About 4 days (6 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.
Good to know: USA
- Currency
- US Dollar (USD)
- Languages
- English, Spanish
- Sockets
- Type A, B · 120 V
- Traffic
- Drives on the right
- Dialling code
- +1
- Emergency number
- 911
UK plugs need a travel adapter
Only 120 V: chargers marked 100–240 V work, other devices need a voltage converter.
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Green Bay compared
Put Green Bay side by side with another destination.
Green Bay vs Milwaukee
In October Milwaukee has the better holiday weather (score 68 vs 59). During the day Milwaukee is 2 °C warmer than Green Bay.
| in October | Green Bay | Milwaukee |
|---|---|---|
| Holiday weather score | 59 | 68 |
| Daytime high | 15° | 17° |
| Sunshine | 5 h | 5 h |
| Rainy days | 10 | 9 |
| Best time | May – Sep | May – Oct |
Through the year
Best places in the country
USA in October: the best places
In October, Green Bay ranks 25 among the 31 nearest destinations in this country.
- Memphis24°84
- 2Omaha19°83
- 3St. Louis21°82
- 4Nashville23°82
- 5Knoxville22°82
- 6Des Moines18°81
- 7Kansas City20°81
- 8Louisville22°80
- 25Green BayThis page15°59
Places nearby
Near Green Bay
Other destinations close by.
Places with a similar climate
Places with a climate like Green Bay
Destinations whose weather through the year is closest to Green Bay's – good alternatives.
Frequently asked questions about Green Bay
When is the best time to visit Green Bay?
The best time to visit Green Bay is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Green Bay?
July is the warmest month, with average highs of 28 °C and nights around 16 °C. January is the coolest month at −3 °C.
When does it rain most in Green Bay?
The wettest month is June with 97 mm of precipitation. The driest month is February with 35 mm.
How many hours of sunshine does Green Bay get?
Green Bay gets around 2,160 hours of sunshine a year. The sunniest month is July with 8.9 hours a day; in December there are 3.1 hours a day.
What time zone is Green Bay in?
Green Bay is on UTC−6 in January and UTC−5 in July.
How long is the flight from London to Green Bay?
A nonstop flight from London to Green Bay takes about 7 h 55 min, for a straight-line distance of about 6,160 km.
Which school holidays are best for Green Bay?
Green Bay has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 24). Holiday ratings (0–100): Easter holidays 42, May half-term 79, summer holidays 82, October half-term 59, Christmas holidays 24.