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Dover, New Hampshire climate
Dfb Warm-summer humid continental
Dover 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 −10°C at night. Precipitation is fairly even year-round, totalling about 1215 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 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 countsDover climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 2 | 6 | 13 | 19 | 24 | 27 | 27 | 22 | 16 | 9 | 3 |
| Avg temp (°C) | −5 | −3 | 1 | 7 | 13 | 18 | 21 | 20 | 16 | 10 | 4 | −1 |
| Avg low (°C) | −10 | −9 | −4 | 1 | 7 | 12 | 15 | 14 | 10 | 4 | −1 | −6 |
| Precipitation (mm) | 86 | 89 | 112 | 107 | 97 | 109 | 96 | 87 | 98 | 122 | 100 | 114 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 0 | 2 | 6 | 13 | 19 | 24 |
| Avg temp (°C) | −5 | −3 | 1 | 7 | 13 | 18 |
| Avg low (°C) | −10 | −9 | −4 | 1 | 7 | 12 |
| Precipitation (mm) | 86 | 89 | 112 | 107 | 97 | 109 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 22 | 16 | 9 | 3 |
| Avg temp (°C) | 21 | 20 | 16 | 10 | 4 | −1 |
| Avg low (°C) | 15 | 14 | 10 | 4 | −1 | −6 |
| Precipitation (mm) | 96 | 87 | 98 | 122 | 100 | 114 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 11 | 12 | 12 | 11 | 11 | 10 | 8 | 10 | 10 | 12 |
| Days with high ≥ 32°C (days) | — | — | — | 0.1 | 0.3 | 1 | 2 | 2 | 0.6 | — | — | — |
| Days with low ≤ 0°C (days) | 28 | 26 | 24 | 12 | 1 | — | — | — | 0.1 | 6 | 18 | 27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 11 | 12 | 12 | 11 |
| Days with high ≥ 32°C (days) | — | — | — | 0.1 | 0.3 | 1 |
| Days with low ≤ 0°C (days) | 28 | 26 | 24 | 12 | 1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 10 | 8 | 10 | 10 | 12 |
| Days with high ≥ 32°C (days) | 2 | 2 | 0.6 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.1 | 6 | 18 | 27 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 64 | 63 | 63 | 66 | 64 | 57 | 54 | 54 | 60 | 63 | 64 |
| Clear days (≤ 30% cloud) | 3 | 4 | 6 | 6 | 5 | 5 | 7 | 8 | 9 | 7 | 5 | 5 |
| Partly cloudy days (30–70%) | 12 | 11 | 11 | 10 | 11 | 11 | 13 | 12 | 10 | 10 | 10 | 12 |
| Cloudy days (≥ 70%) | 15 | 13 | 15 | 14 | 16 | 14 | 12 | 11 | 11 | 14 | 14 | 15 |
| Relative humidity (%) | 86 | 84 | 82 | 82 | 84 | 85 | 83 | 81 | 80 | 79 | 80 | 83 |
| Wind speed (mph) | 9.3 | 9.2 | 8.2 | 6.4 | 5.1 | 4.5 | 4.0 | 4.4 | 5.5 | 7.0 | 7.8 | 8.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 64 | 63 | 63 | 66 | 64 |
| Clear days (≤ 30% cloud) | 3 | 4 | 6 | 6 | 5 | 5 |
| Partly cloudy days (30–70%) | 12 | 11 | 11 | 10 | 11 | 11 |
| Cloudy days (≥ 70%) | 15 | 13 | 15 | 14 | 16 | 14 |
| Relative humidity (%) | 86 | 84 | 82 | 82 | 84 | 85 |
| Wind speed (mph) | 9.3 | 9.2 | 8.2 | 6.4 | 5.1 | 4.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 54 | 54 | 60 | 63 | 64 |
| Clear days (≤ 30% cloud) | 7 | 8 | 9 | 7 | 5 | 5 |
| Partly cloudy days (30–70%) | 13 | 12 | 10 | 10 | 10 | 12 |
| Cloudy days (≥ 70%) | 12 | 11 | 11 | 14 | 14 | 15 |
| Relative humidity (%) | 83 | 81 | 80 | 79 | 80 | 83 |
| Wind speed (mph) | 4.0 | 4.4 | 5.5 | 7.0 | 7.8 | 8.8 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Durham 2 N (NOAA GHCN station USW00054794), about 5 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.