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Bangor, Maine climate
Dfb Warm-summer humid continental
Bangor has a strongly seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 80°F, while the coldest is January averaging around 9°F at night. Precipitation is fairly even year-round, totalling about 42 inches. Snowfall is heavy (75 inches of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsBangor climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 28 | 31 | 40 | 53 | 66 | 75 | 80 | 79 | 71 | 58 | 46 | 35 |
| Avg temp (°F) | 19 | 21 | 31 | 43 | 55 | 64 | 70 | 68 | 60 | 48 | 37 | 26 |
| Avg low (°F) | 9 | 11 | 21 | 32 | 43 | 53 | 59 | 57 | 49 | 38 | 29 | 17 |
| Precipitation (in) | 3.2 | 2.4 | 3.2 | 3.6 | 3.3 | 3.9 | 3.2 | 3.1 | 3.8 | 4.6 | 3.8 | 3.7 |
| Snowfall (in) | 18.6 | 17.5 | 15.2 | 3.7 | — | — | — | — | — | 0.6 | 4.3 | 14.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 28 | 31 | 40 | 53 | 66 | 75 |
| Avg temp (°F) | 19 | 21 | 31 | 43 | 55 | 64 |
| Avg low (°F) | 9 | 11 | 21 | 32 | 43 | 53 |
| Precipitation (in) | 3.2 | 2.4 | 3.2 | 3.6 | 3.3 | 3.9 |
| Snowfall (in) | 18.6 | 17.5 | 15.2 | 3.7 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 80 | 79 | 71 | 58 | 46 | 35 |
| Avg temp (°F) | 70 | 68 | 60 | 48 | 37 | 26 |
| Avg low (°F) | 59 | 57 | 49 | 38 | 29 | 17 |
| Precipitation (in) | 3.2 | 3.1 | 3.8 | 4.6 | 3.8 | 3.7 |
| Snowfall (in) | — | — | — | 0.6 | 4.3 | 14.7 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 10 | 11 | 12 | 12 | 12 | 11 | 10 | 9 | 11 | 11 | 13 |
| Days with high ≥ 90°F (days) | — | — | — | 0.0 | 0.3 | 1 | 2 | 2 | 0.4 | — | — | — |
| Days with low ≤ 32°F (days) | 30 | 27 | 27 | 16 | 2 | — | — | — | 0.7 | 9 | 21 | 29 |
| Days with snowfall ≥ 1 in (days) | 5 | 5 | 4 | 1 | 0.0 | — | — | — | — | 0.1 | 1 | 4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 10 | 11 | 12 | 12 | 12 |
| Days with high ≥ 90°F (days) | — | — | — | 0.0 | 0.3 | 1 |
| Days with low ≤ 32°F (days) | 30 | 27 | 27 | 16 | 2 | — |
| Days with snowfall ≥ 1 in (days) | 5 | 5 | 4 | 1 | 0.0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 10 | 9 | 11 | 11 | 13 |
| Days with high ≥ 90°F (days) | 2 | 2 | 0.4 | — | — | — |
| Days with low ≤ 32°F (days) | — | — | 0.7 | 9 | 21 | 29 |
| Days with snowfall ≥ 1 in (days) | — | — | — | 0.1 | 1 | 4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 67 | 65 | 66 | 68 | 67 | 62 | 57 | 57 | 62 | 67 | 70 |
| Clear days (≤ 30% cloud) | 2 | 3 | 5 | 5 | 4 | 4 | 5 | 7 | 8 | 6 | 4 | 3 |
| Partly cloudy days (30–70%) | 12 | 11 | 11 | 9 | 10 | 10 | 13 | 12 | 10 | 11 | 10 | 11 |
| Cloudy days (≥ 70%) | 17 | 14 | 15 | 16 | 17 | 16 | 13 | 12 | 12 | 15 | 16 | 18 |
| Relative humidity (%) | 92 | 93 | 87 | 81 | 80 | 81 | 82 | 80 | 79 | 81 | 85 | 90 |
| Wind speed (mph) | 0.5 | 0.8 | 0.7 | 0.4 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 67 | 65 | 66 | 68 | 67 |
| Clear days (≤ 30% cloud) | 2 | 3 | 5 | 5 | 4 | 4 |
| Partly cloudy days (30–70%) | 12 | 11 | 11 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 17 | 14 | 15 | 16 | 17 | 16 |
| Relative humidity (%) | 92 | 93 | 87 | 81 | 80 | 81 |
| Wind speed (mph) | 0.5 | 0.8 | 0.7 | 0.4 | 0.2 | 0.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 57 | 57 | 62 | 67 | 70 |
| Clear days (≤ 30% cloud) | 5 | 7 | 8 | 6 | 4 | 3 |
| Partly cloudy days (30–70%) | 13 | 12 | 10 | 11 | 10 | 11 |
| Cloudy days (≥ 70%) | 13 | 12 | 12 | 15 | 16 | 18 |
| Relative humidity (%) | 82 | 80 | 79 | 81 | 85 | 90 |
| Wind speed (mph) | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Bangor Intl AP (NOAA GHCN station USW00014606), about 4 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.