Maine climate by month
January highs across Maine range from 28°F in Bangor to 33°F in Kennebunkport; July highs from 77°F in Kennebunkport to 80°F in Bangor. The most common best months across these cities are June, August, September.
Maine weather month by month
Average of the 5 Maine 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 | 12°F | 11 | 17.8 in |
| February | 34°F | 14°F | 10 | 16.7 in |
| March | 41°F | 23°F | 11 | 13.1 in |
| April | 53°F | 33°F | 12 | 2.9 in |
| May | 64°F | 43°F | 13 | 0.0 in |
| June | 73°F | 53°F | 12 | 0.0 in |
| July | 79°F | 59°F | 11 | 0.0 in |
| August | 78°F | 57°F | 10 | 0.0 in |
| September | 71°F | 50°F | 10 | 0.0 in |
| October | 59°F | 39°F | 12 | 0.3 in |
| November | 47°F | 30°F | 11 | 2.7 in |
| December | 37°F | 20°F | 13 | 14.0 in |
Regional differences
- Warmest winterKennebunkport: January high 33°F
- Coolest summerKennebunkport: July high 77°F
- Most wet daysLewiston: 140 a year
- Fewest wet daysPortland: 131 a year
- Most snowLewiston: 77.5 in a year
Warmest and coolest Maine city each month
| Month | Warmest | Coolest | Best month for |
|---|---|---|---|
| January | Kennebunkport 33°F | Bangor 28°F | – |
| February | Portland 35°F | Bangor 31°F | – |
| March | Portland 42°F | Bangor 40°F | – |
| April | Lewiston 54°F | Kennebunkport 52°F | – |
| May | Bangor 66°F | Kennebunkport 62°F | 1 city |
| June | Bangor 75°F | Kennebunkport 71°F | 5 cities |
| July | Bangor 80°F | Kennebunkport 77°F | – |
| August | Bangor 79°F | Kennebunkport 76°F | 2 cities |
| September | Portland 71°F | Kennebunkport 69°F | 5 cities |
| October | Portland 60°F | Lewiston 58°F | – |
| November | Portland 48°F | Bangor 46°F | – |
| December | Kennebunkport 39°F | Bangor 35°F | – |
By normal daily high. "Best month for": how many of the 5 cities have it among their best months by our comfort score.
Frost and humidity across Maine
- Earliest typical last frostLewiston: Apr 25
- Latest typical last frostKennebunkport: May 9
- Most muggy daysKennebunkport: 16 a year
- Fewest muggy daysBangor: 8 a year
All Maine cities
| City | Jan high | Jul high | Wet days/yr | Snow/yr | Best months |
|---|---|---|---|---|---|
| Bangor | 28°F | 80°F | 134 | 74.6 in | Jun, Sep |
| Bar Harbor | 33°F | 79°F | 139 | – | Jun, Aug, Sep |
| Kennebunkport | 33°F | 77°F | 134 | 48.9 in | Jun, Aug, Sep |
| Lewiston | 29°F | 79°F | 140 | 77.5 in | May, Jun, Sep |
| Portland | 32°F | 80°F | 131 | 68.7 in | Jun, Sep |