Annual mean 10°C · wettest around March · prevailing wind SW
Warmest
27.2 °C
Coldest
-2.2 °C
Wettest
46%
Windiest
5.6 m/s
Prevailing
SW
4.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Ann Arbor over the whole year is 10°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -4°C. Ann Arbor has no sharply defined rainy season: the chance of rain on a given day runs from 34% in September, the driest month, to 40% in March, the wettest. Winds in Ann Arbor are highest in February, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.4 m/s (9 km/h). The prevailing wind is from the SW. The clearest skies in Ann Arbor come in July, when the sky is typically 39% covered; January is the cloudiest month, at 73%.
Month by month Ann Arbor climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-2°C
-4°C
-7°C
35%
73%
3.9 m/s
0
0
2
February
1°C
-3°C
-5°C
36%
62%
4.0 m/s
1
0
6
March
6°C
0°C
0°C
40%
57%
4.0 m/s
3
0
18
April
12°C
5°C
7°C
39%
55%
3.9 m/s
17
1
45
May
19°C
12°C
16°C
40%
50%
3.4 m/s
50
12
63
June
25°C
18°C
23°C
35%
41%
3.1 m/s
68
35
46
July
27°C
20°C
27°C
39%
39%
2.6 m/s
53
58
19
August
26°C
18°C
26°C
36%
40%
2.4 m/s
60
52
28
September
23°C
15°C
22°C
34%
44%
2.5 m/s
70
28
55
October
16°C
9°C
12°C
37%
54%
3.1 m/s
36
5
61
November
8°C
3°C
3°C
38%
58%
3.6 m/s
7
0
26
December
2°C
-1°C
-4°C
36%
71%
3.8 m/s
0
0
6
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Ann Arbor weather by season
Year round, Ann Arbor has days of about -2°C at their warmest in January, its coolest month, and 27°C in July, its warmest; the coolest hours of the day run from -4°C to 20°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around March and least likely around September. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Ann Arbor weather in winterDecember to February
High 0°CLow -3°CRain 36%
Winter in Ann Arbor has typical daily highs of about 0°C and lows of about -3°C, with a 36% chance of rain on a given day.
Ann Arbor weather in springMarch to May
High 12°CLow 6°CRain 40%
Spring in Ann Arbor has typical daily highs of about 12°C and lows of about 6°C, with a 40% chance of rain on a given day.
Ann Arbor weather in summerJune to August
High 26°CLow 19°CRain 36%
Summer in Ann Arbor has typical daily highs of about 26°C and lows of about 19°C, with a 36% chance of rain on a given day.
Ann Arbor weather in autumnSeptember to November
High 15°CLow 9°CRain 36%
Autumn in Ann Arbor has typical daily highs of about 15°C and lows of about 9°C, with a 36% chance of rain on a given day.
When is the rainy season in Ann Arbor?
Ann Arbor has no sharply defined rainy season: the chance of rain on a given day runs from 34% in September, the driest month, to 40% in March, the wettest.
What time of year is Ann Arbor windiest?
Winds in Ann Arbor are highest in February, averaging 4.0 m/s (14 km/h), and lightest in August, at 2.4 m/s (9 km/h). The prevailing wind is from the SW.
What is the average temperature in Ann Arbor year round?
The average temperature in Ann Arbor over the whole year is 10°C. July is the hottest month, with highs of about 27°C; January is the coldest, with lows of about -4°C.