Michigan climate by month
January highs across Michigan range from 27°F in Mackinac Island to 32°F in Detroit; July highs from 77°F in Mackinac Island to 84°F in Ann Arbor. The most common best months across these cities are May, June, September.
Michigan weather month by month
Average of the 8 Michigan cities on this site, computed from NOAA's unrounded values (so it can differ by a degree from averaging the rounded city figures); individual cities differ, sometimes a lot.
| Month | High | Low | Wet days | Snow |
|---|---|---|---|---|
| January | 31°F | 17°F | 15 | 20.7 in |
| February | 33°F | 18°F | 11 | 16.1 in |
| March | 44°F | 25°F | 11 | 8.3 in |
| April | 56°F | 36°F | 12 | 2.8 in |
| May | 69°F | 47°F | 13 | 0.04 in |
| June | 78°F | 57°F | 11 | 0.0 in |
| July | 82°F | 62°F | 10 | 0.0 in |
| August | 81°F | 60°F | 10 | 0.0 in |
| September | 73°F | 53°F | 11 | 0.0 in |
| October | 60°F | 42°F | 13 | 0.2 in |
| November | 47°F | 32°F | 12 | 5.1 in |
| December | 36°F | 24°F | 14 | 16.2 in |
Regional differences
- Warmest winterDetroit: January high 32°F
- Coolest summerMackinac Island: July high 77°F
- Most wet daysAnn Arbor: 166 a year
- Fewest wet daysWarren: 120 a year
- Most snowTraverse City: 143.3 in a year
Warmest and coolest Michigan city each month
| Month | Warmest | Coolest | Best month for |
|---|---|---|---|
| January | Detroit 32°F | Mackinac Island 27°F | – |
| February | Ann Arbor 35°F | Mackinac Island 29°F | – |
| March | Ann Arbor 46°F | Mackinac Island 38°F | – |
| April | Ann Arbor 60°F | Mackinac Island 49°F | – |
| May | Ann Arbor 71°F | Mackinac Island 62°F | 7 cities |
| June | Ann Arbor 80°F | Mackinac Island 72°F | 5 cities |
| July | Ann Arbor 84°F | Mackinac Island 77°F | – |
| August | Dearborn 82°F | Mackinac Island 77°F | – |
| September | Ann Arbor 75°F | Mackinac Island 70°F | 3 cities |
| October | Ann Arbor 62°F | Mackinac Island 56°F | – |
| November | Dearborn 48°F | Mackinac Island 44°F | – |
| December | Detroit 37°F | Mackinac Island 33°F | – |
By normal daily high. "Best month for": how many of the 8 cities have it among their best months by our comfort score.
Frost and humidity across Michigan
- Earliest typical last frostDetroit: Apr 21
- Latest typical last frostTraverse City: May 12
- Most muggy daysDearborn: 30 a year
- Fewest muggy daysMackinac Island: 10 a year
All Michigan cities
| City | Jan high | Jul high | Wet days/yr | Snow/yr | Best months |
|---|---|---|---|---|---|
| Ann Arbor | 32°F | 84°F | 166 | 61.4 in | May |
| Dearborn | 32°F | 84°F | 136 | 45.0 in | May |
| Detroit | 32°F | 84°F | 136 | 45.0 in | May, Jun, Sep |
| Grand Rapids | 31°F | 83°F | 149 | 77.6 in | May, Jun, Sep |
| Lansing | 31°F | 83°F | 138 | 50.2 in | May, Jun, Sep |
| Mackinac Island | 27°F | 77°F | 153 | 87.6 in | Jun |
| Traverse City | 29°F | 81°F | 146 | 143.3 in | May, Jun |
| Warren | 32°F | 84°F | 120 | 45.0 in | May |
Also covered: Sterling Heights (see Warren). These cities use the same weather stations as the city named.