Portland, ME Weather & Climate Normals
Portland's real weather, in one number
Portland, ME scores 34/100 on this site's reading of NOAA's own 30-year normals: weather-driven. Heat, cold, snow, or rainfall here are heavy enough that they shape daily life for a large part of the year. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Portland's hottest and coldest months
Portland's hottest month is Jul, averaging 70°F; its coldest is Jan, averaging 22°F, a 47.6°F swing across the year, one of the widest gaps in this dataset.
Portland's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 30°F | 14°F | 3.55in | 20.6in |
| Feb | 33°F | 16°F | 3.34in | 20.4in |
| Mar | 41°F | 25°F | 4.01in | 16.2in |
| Apr | 53°F | 34°F | 4.4in | 4.7in |
| May | 64°F | 44°F | 3.56in | 0in |
| Jun | 73°F | 54°F | 4.73in | 0in |
| Jul | 79°F | 60°F | 3.73in | 0in |
| Aug | 78°F | 59°F | 3.84in | 0in |
| Sep | 70°F | 52°F | 4.32in | 0in |
| Oct | 58°F | 41°F | 5.42in | 0.6in |
| Nov | 46°F | 31°F | 4.65in | 3.8in |
| Dec | 35°F | 21°F | 4.59in | 17.7in |
Jun, Jul, Aug, and Sep are the best time to see Portland at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Portland
Portland averages 50.14in of precipitation a year across roughly 140 days with measurable rain or snow, and 84in of snow a year.
Where Portland ranks
Portland ranks 4814 of 4876 US cities in this dataset for comfort score, and 16 of 20 within ME. About 69,568 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Gray, ME US, 18.2 miles from Portland, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station