NOAA NCEI Climate Normals 1991–2020
Maine Weather by Month
Temperature, rain and the hurricane season at 44 Maine stations, month by month.
Data: NOAA NHC HURDAT2 and NOAA SPC tornado and hail reports, through 2025 · Updated
The median station records 47.9 inches of precipitation a year; W Rockport 1 NNW, ME records the most, 56.3 inches, and Frenchville Aroostook Airport, ME the least, 33.2 (1.7 times as much). July is the hottest month at the median station (average high 79°F); the hottest July is at Fryeburg E Slopes Airport, ME, 82°F. January is the coldest (average low 8°F); the coldest January nights are at Van Buren 2, ME, -4°F. Highs reach 90°F on 4 days a year at the median station and on 11 at Fryeburg E Slopes Airport, ME, the most. Snowfall is heaviest at Caribou Municipal Airport, ME, 118.2 inches a year.
This page compares the 1991–2020 NOAA climate normals of 44 Maine weather stations, each the nearest station with full normals to at least one of the 160 Maine cities on this site that have one within 25 miles.
At the median station, October is the wettest month (5.1 inches) and February the driest (3.1). Station by station, the wettest month is October at 37, June at 3 and July at 3 of the 44, and the driest February at 31, July at 6 and January at 4. The gap between the wettest and driest station is widest in December: 3.6 inches.
Month by month across Maine
High, low and precipitation are the median of the 44 stations; the station columns name the station with the highest average high, the lowest average low, and the most and least precipitation that month, each linked to the city page it serves. Source: NOAA NCEI U.S. Climate Normals 1991–2020.
Hurricane season in Maine
June to November, the hurricane season months, bring 53% of the year's precipitation at the median station, from 48% at W Rockport 1 NNW, ME to 65% at Frenchville Aroostook Airport, ME. Since 1851, 70 tropical systems have passed within 75 miles of a Maine city on this site, 12 of them at hurricane strength at their closest point to one; September has brought the most (30), then August (12). 3 came outside June to November.
| Month | Tropical systems | At hurricane strength | Median precip. in |
|---|---|---|---|
| Jan | 0 | 0 | 3.5 |
| Feb | 1 | 0 | 3.1 |
| Mar | 0 | 0 | 3.8 |
| Apr | 0 | 0 | 4.2 |
| May | 2 | 0 | 3.7 |
| Jun | 5 | 0 | 4.3 |
| Jul | 6 | 0 | 3.7 |
| Aug | 12 | 2 | 3.6 |
| Sep | 30 | 8 | 3.8 |
| Oct | 11 | 1 | 5.1 |
| Nov | 3 | 1 | 4.3 |
| Dec | 0 | 0 | 4.3 |
Tropical systems from NOAA NHC HURDAT2 that passed within 75 miles of a Maine city on this site, each counted once, in the month of its first such pass; hurricane strength is the track's wind at its closest point to a city.
Coastal water temperature by month
Across 4 NOAA tide stations, the water is warmest in August (median 59°F, up to 64°F at Seavey Island, ME) and coolest in February (median 38°F, down to 36°F at Portland, ME). No month averages 80°F at the median station.
| Station | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eastport, ME | 42 | 38 | 38 | 41 | 44 | 48 | 52 | 55 | 56 | 55 | 52 | 46 |
| Cutler Farris Wharf, ME | 42 | 39 | 39 | 41 | 45 | 48 | 52 | 54 | 55 | 54 | 50 | 45 |
| Portland, ME | 39 | 36 | 39 | 44 | 50 | 57 | 61 | 63 | 62 | 57 | 50 | 43 |
| Seavey Island, ME | 40 | 37 | 40 | 44 | 52 | 58 | 61 | 64 | 62 | 57 | 50 | 43 |
°F, average of hourly readings 2021–2025; a month counts when at least three years have half their hours on record. Source: NOAA Tides & Currents; the newest readings are preliminary.
Maine cities and their stations
How stations are matched to cities and what normals are: methodology · other states by month