Ann Arbor weather by month
Average highs run from 32°F in January to 84°F in July, and January nights average 15°F. It gets 30 inches of rain and melted snow a year and 59 inches of snow. Nights drop below freezing about 150 times a year. The most comfortable months are May to September.
Best time to visit Ann Arbor
For comfortable weather, go in May to September. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 32°F | 15°F | 1.7 in | 16.6 in | 4 | 0 | 29 | very cold |
| February | 35°F | 16°F | 1.5 in | 17.1 in | 4 | 0 | 26 | cold |
| March | 45°F | 25°F | 2.0 in | 7.3 in | 5 | 0 | 24 | cold |
| April | 59°F | 35°F | 3.0 in | 2.4 in | 7 | 0 | 12 | cool |
| May | 70°F | 46°F | 3.4 in | 0.0 in | 7 | 0 | 3 | mild |
| June | 79°F | 54°F | 3.6 in | 0.0 in | 6 | 2 | 0 | warm |
| July | 84°F | 57°F | 3.2 in | 0.0 in | 6 | 5 | 0 | warm |
| August | 81°F | 57°F | 2.7 in | 0.0 in | 5 | 2 | 0 | warm |
| September | 74°F | 48°F | 2.8 in | 0.0 in | 5 | 1 | 1 | mild |
| October | 62°F | 38°F | 2.2 in | 0.1 in | 6 | 0 | 10 | cool |
| November | 48°F | 30°F | 2.1 in | 3.9 in | 5 | 0 | 20 | cold |
| December | 36°F | 22°F | 1.7 in | 11.9 in | 4 | 0 | 27 | cold |
| Year | 59°F avg | 37°F avg | 29.8 in | 59.3 in | 63 | 11 | 150 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Ann Arbor Municipal Airport, MI (USW00094889), 3.2 miles from the city center; snowfall from Ann Arbor SE, MI. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Ann Arbor
The shortest day is December 21, with 9h 05m of daylight; the longest is June 21, with 15h 16m. The earliest sunset comes around December 3 (5:02 pm) and the latest around June 23 (9:15 pm). The sun sets after 8 pm on 158 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 8:01 am | 5:27 pm | 9h 26m |
| February | 7:31 am | 6:07 pm | 10h 36m |
| March | 7:46 am | 7:41 pm | 11h 54m |
| April | 6:54 am | 8:16 pm | 13h 22m |
| May | 6:13 am | 8:49 pm | 14h 35m |
| June | 5:58 am | 9:13 pm | 15h 15m |
| July | 6:12 am | 9:09 pm | 14h 57m |
| August | 6:42 am | 8:35 pm | 13h 53m |
| September | 7:15 am | 7:44 pm | 12h 29m |
| October | 7:48 am | 6:52 pm | 11h 05m |
| November | 7:25 am | 5:12 pm | 9h 47m |
| December | 7:57 am | 5:03 pm | 9h 06m |
Calculated for 2026 at the center of Ann Arbor with NOAA's solar equations, in local clock time (Eastern Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Ann Arbor getting warmer?
The last 10 years averaged 3.1°F warmer than the 20th century. See the climate stripes for Ann Arbor.Frequently asked questions
What is the warmest month in Ann Arbor?
July is the warmest month, with an average high of 84°F and an average low of 57°F (NOAA 1991-2020 normals).
What is the coldest month in Ann Arbor?
January is the coldest, with average lows of 15°F and highs of 32°F.
What is the rainiest month in Ann Arbor?
June gets the most precipitation, 3.6 inches on average. February is the driest at 1.5 inches.
Does it snow in Ann Arbor?
Yes. Ann Arbor averages 59 inches of snow a year.
When is the best time to visit Ann Arbor?
For comfortable weather, May to September. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Ann Arbor?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Ann Arbor profile.
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