AI-generatedAnn Arbor at a glance
- Best time
- May – Oct
- Warmest month
- Jul · 29°
- Sunshine a year
- 2,040 h
- Rain a year
- 897 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 269 m
Climate in Ann Arbor
Ann Arbor has warm to hot summers and cold winters with occasional snow. July is the warmest month with average highs of 29 °C, while January is the coolest at 1 °C. With around 2,040 hours of sunshine a year, Ann Arbor is moderately sunny; July is the sunniest month with 8.5 hours a day.
Holiday weather through the year
Best time to visit Ann Arbor
The best time to visit Ann Arbor is from May to October. For sightseeing, day trips and hiking, conditions are most comfortable in April, in June and from August to October. The wettest month is May with 99 mm of precipitation.
Ann Arbor through the seasons
How the weather changes over the seasons, with averages for each.
Ann Arbor in spring
Mar – May
Fair
- 9–22 °C by day
- 6.2 h of sun a day
- 34 rainy days in all
Ann Arbor in summer
Jun – Aug
Good
- 27–29 °C by day
- 7.9 h of sun a day
- 32 rainy days in all
Ann Arbor in autumn
Sep – Nov
Good
- 10–24 °C by day
- 4.9 h of sun a day
- 26 rainy days in all
Ann Arbor in winter
Dec – Feb
Poor
- 1–3 °C by day
- 3.3 h of sun a day
- 28 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr, Jun, Aug – Oct
15–28 °C and not too much rain
Snow
Dec – Mar
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Ann Arbor for you.
Your best months: May, September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Good
Best time to visit: May – October
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 7°
- Midday, 13:00: about 16°
- Afternoon, 16:00: about 17°
- Evening, 20:00: about 13°
- Night, 23:00: about 10°
07:4618:55
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 07:29–08:24 · evening 18:17–19:12
- Blue hour
- Morning 07:18–07:29 · evening 19:12–19:23
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 Ann Arbor compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 21° at the start of the month to 13° at the end. The days get 1.3 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 21° | 13° |
| Night-time low | 9° | 3° |
| Daylight | 11.8 h | 10.5 h |
What is the weather like in Ann Arbor in October?
In October, Ann Arbor is mild: daytime highs average 17 °C, and nights cool down to about 6 °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 good month for a holiday in Ann Arbor.
More details for October
- Daylight
- 11 h 9 min07:46 – 18:55
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 19 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−4offset from UTC
How the score comes together
- Temperatureweight 50 %91 %
- Sunshineweight 20 %30 %
- Few rainy daysweight 30 %60 %
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 Ann Arbor
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
June has the better holiday weather in Ann Arbor: score 83 against 70. In June, days are 10 °C warmer than in October. June has one more rainy day. The sun shines 3 hours longer a day in June.
| Month | October | June |
|---|---|---|
| Holiday weather score | 70 | 83better |
| Daytime high | 17° | 27° |
| Night-time low | 6° | 15° |
| Sunshine | 4.8 h | 8.2 hbetter |
| Rainy days | 10better | 11 |
| Rainfall | 70 mmbetter | 93 mm |
| Muggy days | 0better | 6 |
Based on the climate averages 1996–2025.
Ann Arbor month by month
The typical weather for every month at a glance.
18January1° · 3.1 h
In January, Ann Arbor is bitterly cold: daytime highs average 1 °C, and nights often drop below freezing (−8 °C). The sun is scarce, with only about 3.1 hours a day. Precipitation falls on about 10 days, totalling 62 mm; on about 5 of them it snows. All in all, January is not an ideal month for a holiday in Ann Arbor.
Ann Arbor in January25February3° · 4.3 h
In February, Ann Arbor is bitterly cold: daytime highs average 3 °C, and nights often drop below freezing (−7 °C). Expect around 4.3 hours of sunshine a day. Precipitation falls on about 9 days, totalling 57 mm; on about 5 of them it snows. All in all, February is not an ideal month for a holiday in Ann Arbor.
Ann Arbor in February29March9° · 5.4 h
In March, Ann Arbor is cold: daytime highs average 9 °C, and nights often drop below freezing (−3 °C). Expect around 5.4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 67 mm in total. Snow falls on about 3 days. All in all, March is not an ideal month for a holiday in Ann Arbor.
Ann Arbor in March62April16° · 6.2 h
In April, Ann Arbor is cool: daytime highs average 16 °C, and nights cool down to about 3 °C. Expect around 6.2 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 89 mm in total. All in all, April is a good month for a holiday in Ann Arbor.
Ann Arbor in April75May22° · 6.9 h
In May, Ann Arbor is warm: daytime highs average 22 °C, and nights cool down to about 9 °C. The sun shines for around 6.9 hours a day. Rain is frequent, with about 12 rainy days and 99 mm in total. All in all, May is a good month for a holiday in Ann Arbor.
Ann Arbor in May83June27° · 8.2 h
In June, Ann Arbor is hot: daytime highs average 27 °C, and nights cool down to about 15 °C. The sun shines for around 8.2 hours a day. Rain is frequent, with about 11 rainy days and 93 mm in total. On about 8 days the thermometer climbs to 30 °C or more. All in all, June is an excellent month for a holiday in Ann Arbor.
Ann Arbor in June70July29° · 8.5 h
In July, Ann Arbor is hot: daytime highs average 29 °C, and nights cool down to about 17 °C. The sun shines for around 8.5 hours a day. Rain is frequent, with about 11 rainy days and 91 mm in total. On about 13 days the thermometer climbs to 30 °C or more. All in all, July is a good month for a holiday in Ann Arbor.
Ann Arbor in July74August28° · 7.1 h
In August, Ann Arbor is hot: daytime highs average 28 °C, and nights cool down to about 16 °C. The sun shines for around 7.1 hours a day. Rain is frequent, with about 10 rainy days and 79 mm in total. On about 8 days the thermometer climbs to 30 °C or more. All in all, August is a good month for a holiday in Ann Arbor.
Ann Arbor in August82September24° · 6.3 h
In September, Ann Arbor is warm: daytime highs average 24 °C, and nights cool down to about 12 °C. Expect around 6.3 hours of sunshine a day. Rain falls on about 8 days, adding up to 69 mm. All in all, September is an excellent month for a holiday in Ann Arbor.
Ann Arbor in September70October17° · 4.8 h
In October, Ann Arbor is mild: daytime highs average 17 °C, and nights cool down to about 6 °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 good month for a holiday in Ann Arbor.
Ann Arbor in October30November10° · 3.6 h
In November, Ann Arbor is cold: daytime highs average 10 °C, and nights cool down to about 1 °C. The sun is scarce, with only about 3.6 hours a day. Rain falls on about 8 days, adding up to 60 mm. Snow falls on about 2 days. All in all, November is not an ideal month for a holiday in Ann Arbor.
Ann Arbor in November17December3° · 2.6 h
In December, Ann Arbor is cold: daytime highs average 3 °C, and nights often drop below freezing (−4 °C). The sun is scarce, with only about 2.6 hours a day. Precipitation falls on about 10 days, totalling 62 mm; on about 4 of them it snows. All in all, December is not an ideal month for a holiday in Ann Arbor.
Ann Arbor 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 Ann Arbor
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 6°. The room should be heated.
The coolest nights are in January (−8°), the warmest in July (17°). Nights are pleasant for sleeping (15 to 20 °C) from June 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 | 18 | 1° | −8° | 3.1 h | 10 | 62 |
| FebruaryFeb | 25 | 3° | −7° | 4.3 h | 9 | 57 |
| MarchMar | 29 | 9° | −3° | 5.4 h | 10 | 67 |
| AprilApr | 62 | 16° | 3° | 6.2 h | 12 | 89 |
| MayMay | 75 | 22° | 9° | 6.9 h | 12 | 99 |
| JuneJun | 83 | 27° | 15° | 8.2 h | 11 | 93 |
| JulyJul | 70 | 29° | 17° | 8.5 h | 11 | 91 |
| AugustAug | 74 | 28° | 16° | 7.1 h | 10 | 79 |
| SeptemberSep | 82 | 24° | 12° | 6.3 h | 8 | 69 |
| OctoberOct | 70 | 17° | 6° | 4.8 h | 10 | 70 |
| NovemberNov | 30 | 10° | 1° | 3.6 h | 8 | 60 |
| DecemberDec | 17 | 3° | −4° | 2.6 h | 10 | 62 |
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
42.28° N, 83.74° W · 269 m · America/Detroit
Sunshine
Sunshine hours in Ann Arbor
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 Ann Arbor, 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 Ann Arbor: 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, Ann Arbor has about 10 rainy days with 70 mm of rain in total.
UV index
UV index in Ann Arbor
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 9).
Minutes until sunburn in October
- Very fair skin
- about 35 min
- Fair skin
- about 45 min
- Light brown skin
- about 65 min
- Olive skin
- about 80 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 Ann Arbor
How breezy and how cloudy Ann Arbor 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 Ann Arbor typically peaks at 19 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 59 % of the sky over Ann Arbor: 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 Ann Arbor
How often the day gets hot in Ann Arbor (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, Ann Arbor 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
Snow in Ann Arbor
When Ann Arbor 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 Ann Arbor.
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 Ann Arbor
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Ann Arbor 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.
Ann Arbor has its best school-holiday weather during May half-term (score 77) and its weakest during the Christmas holidays (score 18).
- 52
Easter holidays
Mar – Apr
Fair
- 13 °C by day
- 6.0 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 77
May half-term
May – Jun
GoodBest holidays
- 23 °C by day
- 7.2 h of sun a day
- 12 rainy days a month
- 73
Summer holidays
Jul – Aug
Good
- 28 °C by day
- 7.6 h of sun a day
- 11 rainy days a month
- 70
October half-term
Oct
Good
- 17 °C by day
- 4.8 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 18
Christmas holidays
Dec – Jan
Poor
- 2 °C by day
- 2.9 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 50 min
- Distance
- 6,060 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.
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
Ann Arbor compared
Put Ann Arbor side by side with another destination.
Ann Arbor vs Detroit
In October the holiday weather in Ann Arbor and Detroit is about equally good (score 70 vs 71). During the day it is about as warm in Detroit as in Ann Arbor.
| in October | Ann Arbor | Detroit |
|---|---|---|
| Holiday weather score | 70 | 71 |
| Daytime high | 17° | 17° |
| Sunshine | 5 h | 5 h |
| Rainy days | 10 | 9 |
| Best time | May – Oct | May – Oct |
Through the year
Best places in the country
USA in October: the best places
In October, Ann Arbor ranks 20 among the 31 nearest destinations in this country.
- St. Louis21°82
- 2Knoxville22°82
- 3Nashville23°82
- 4Asheville21°82
- 5Richmond22°82
- 6Washington21°19°81
- 7Alexandria21°19°81
- 8Louisville22°80
- 20Ann ArborThis page17°70
Places nearby
Near Ann Arbor
Other destinations close by.
Places with a similar climate
Places with a climate like Ann Arbor
Destinations whose weather through the year is closest to Ann Arbor's – good alternatives.
Frequently asked questions about Ann Arbor
When is the best time to visit Ann Arbor?
The best time to visit Ann Arbor is from May to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Ann Arbor?
July is the warmest month, with average highs of 29 °C and nights around 17 °C. January is the coolest month at 1 °C.
When does it rain most in Ann Arbor?
The wettest month is May with 99 mm of precipitation. The driest month is February with 57 mm.
How many hours of sunshine does Ann Arbor get?
Ann Arbor gets around 2,040 hours of sunshine a year. The sunniest month is July with 8.5 hours a day; in December there are 2.6 hours a day.
What time zone is Ann Arbor in?
Ann Arbor is on UTC−5 in January and UTC−4 in July.
How long is the flight from London to Ann Arbor?
A nonstop flight from London to Ann Arbor takes about 7 h 50 min, for a straight-line distance of about 6,060 km.
Which school holidays are best for Ann Arbor?
Ann Arbor has its best school-holiday weather during May half-term (score 77) and its weakest during the Christmas holidays (score 18). Holiday ratings (0–100): Easter holidays 52, May half-term 77, summer holidays 73, October half-term 70, Christmas holidays 18.