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Augusta, Maine climate
Dfb Warm-summer humid continental
Augusta has a strongly seasonal cool-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is July with an average daily high near 27°C, while the coldest is January averaging around −11°C at night. Around 1063 mm of precipitation falls each year, peaking in October (119 mm) and easing off in February (59 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Augusta climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −2 | 0 | 5 | 12 | 19 | 24 | 27 | 26 | 22 | 14 | 8 | 2 |
| Avg temp (°C) | −6 | −5 | 0 | 7 | 13 | 18 | 21 | 21 | 16 | 10 | 3 | −3 |
| Avg low (°C) | −11 | −10 | −5 | 1 | 7 | 12 | 16 | 15 | 11 | 5 | −1 | −7 |
| Precipitation (mm) | 67 | 59 | 82 | 97 | 83 | 102 | 81 | 87 | 99 | 119 | 100 | 87 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −2 | 0 | 5 | 12 | 19 | 24 |
| Avg temp (°C) | −6 | −5 | 0 | 7 | 13 | 18 |
| Avg low (°C) | −11 | −10 | −5 | 1 | 7 | 12 |
| Precipitation (mm) | 67 | 59 | 82 | 97 | 83 | 102 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 26 | 22 | 14 | 8 | 2 |
| Avg temp (°C) | 21 | 21 | 16 | 10 | 3 | −3 |
| Avg low (°C) | 16 | 15 | 11 | 5 | −1 | −7 |
| Precipitation (mm) | 81 | 87 | 99 | 119 | 100 | 87 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 11 | 12 | 13 | 13 | 12 | 11 | 10 | 12 | 11 | 12 |
| Days with high ≥ 32°C (days) | — | — | — | 0.0 | 0.4 | 1.0 | 2 | 1 | 0.5 | — | — | — |
| Days with low ≤ 0°C (days) | 30 | 27 | 26 | 12 | 0.4 | 0.0 | — | — | 0.1 | 5 | 19 | 28 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 1 | 0.3 | — | — | — | — | — | 0.0 | 0.5 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 11 | 12 | 13 | 13 |
| Days with high ≥ 32°C (days) | — | — | — | 0.0 | 0.4 | 1.0 |
| Days with low ≤ 0°C (days) | 30 | 27 | 26 | 12 | 0.4 | 0.0 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 1 | 0.3 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 11 | 10 | 12 | 11 | 12 |
| Days with high ≥ 32°C (days) | 2 | 1 | 0.5 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.1 | 5 | 19 | 28 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | 0.0 | 0.5 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 63 | 62 | 65 | 68 | 66 | 60 | 56 | 56 | 63 | 65 | 65 |
| Relative humidity (%) | 93 | 93 | 87 | 80 | 79 | 80 | 81 | 80 | 79 | 81 | 84 | 90 |
| Wind speed (km/h) | 2.3 | 3.3 | 3.3 | 2.1 | 1.4 | 1.3 | 1.2 | 1.3 | 1.3 | 1.4 | 1.3 | 1.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 63 | 62 | 65 | 68 | 66 |
| Relative humidity (%) | 93 | 93 | 87 | 80 | 79 | 80 |
| Wind speed (km/h) | 2.3 | 3.3 | 3.3 | 2.1 | 1.4 | 1.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 56 | 56 | 63 | 65 | 65 |
| Relative humidity (%) | 81 | 80 | 79 | 81 | 84 | 90 |
| Wind speed (km/h) | 1.2 | 1.3 | 1.3 | 1.4 | 1.3 | 1.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Augusta State AP (NOAA GHCN station USW00014605), about 2 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.