Ann Arbor Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Ann Arbor, Michigan during each month of the year.
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 70, 80 or 90 °F each month in Ann Arbor, scroll down farther. There are also monthly and yearly counts of days with cold weather.
The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 32 | 18 | January | 0 | -8 |
| 35 | 19 | February | 2 | -7 |
| 47 | 27 | March | 8 | -3 |
| 60 | 37 | April | 15 | 3 |
| 73 | 50 | May | 23 | 10 |
| 80 | 59 | June | 27 | 15 |
| 85 | 63 | July | 30 | 17 |
| 82 | 61 | August | 28 | 16 |
| 76 | 55 | September | 24 | 13 |
| 63 | 44 | October | 17 | 6 |
| 48 | 32 | November | 9 | 0 |
| 37 | 25 | December | 3 | -4 |
| 60 | 41 | Year | 15 | 5 |
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 32 | 16 | January | 0 | -9 |
| 35 | 18 | February | 2 | -8 |
| 46 | 25 | March | 8 | -4 |
| 60 | 36 | April | 15 | 2 |
| 71 | 47 | May | 22 | 8 |
| 80 | 56 | June | 27 | 13 |
| 84 | 60 | July | 29 | 16 |
| 82 | 59 | August | 28 | 15 |
| 75 | 52 | September | 24 | 11 |
| 62 | 41 | October | 17 | 5 |
| 48 | 31 | November | 9 | -1 |
| 36 | 22 | December | 2 | -6 |
| 59 | 38 | Year | 15 | 4 |
Days of Hot Weather in Ann Arbor
From May until September, Ann Arbor sees the occasional day of 90-degree Fahrenheit temperatures. But most summer days stay in the 80s. Highs above 100 °F (38 °C) are not expected here.
| 70 °F 21 °C |
80 °F 27 °C |
90 °F 32 °C | |
|---|---|---|---|
| January | 0 | 0 | 0 |
| February | 0 | 0 | 0 |
| March | 1 | 0 | 0 |
| April | 6 | 1 | 0 |
| May | 18 | 7 | 0 |
| June | 28 | 16 | 3 |
| July | 31 | 24 | 6 |
| August | 30 | 21 | 2 |
| September | 22 | 10 | 1 |
| October | 8 | 1 | 0 |
| November | 1 | 0 | 0 |
| December | 0 | 0 | 0 |
| Year | 145 | 81 | 12 |
How Often Ann Arbor Has Cold Temperatures
Freezing temperatures at Ann Arbor can occur from October until May. The city averages 130 frosty nights annually, including most nights from December until March. On four of those winter nights, the thermometer drops to 0 °F (-18 °C) or below.
Typically on 45 days a year the temperature never rises above freezing. Days that chilly can occur from November to April.
| 10 °F -12 °C |
20 °F -8 °C |
32 °F 0 °C | |
|---|---|---|---|
| January | 8 | 17 | 28 |
| February | 6 | 13 | 25 |
| March | 2 | 7 | 22 |
| April | 0 | 1 | 9 |
| May | 0 | 0 | 1 |
| June | 0 | 0 | 0 |
| July | 0 | 0 | 0 |
| August | 0 | 0 | 0 |
| September | 0 | 0 | 0 |
| October | 0 | 0 | 4 |
| November | 0 | 3 | 16 |
| December | 3 | 10 | 26 |
| Year | 18 | 50 | 130 |
References
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.
NOAA National Centers for Environmental Information (NCEI). Climate Normals.