Dover climate — normals and trends
Dover (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.9 °C and it receives 1,099 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (21.6 °C on average) and the coldest is January (-4.1 °C). Rainfall peaks in November.
Dover averages 113 frost days, 11 hot days (≥ 30 °C) and 120 rainy days per year.
Dover has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 121 to 105 per year over the period.
The hottest day of the period reached 38.0 °C (on 24 June 2025) and the coldest -26.7 °C (on 13 February 1967).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
DoverNew Hampshire
- coords
- 43.20°, -70.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.9°C
Average daily high
13.1°C
Average daily low
4.9°C
Annual rainfall
1,099mm
Sunshine / day
8.8h
Mean relative humidity
72%
Average peak wind
17.9km/h
Seasonal range
25.7°C
Frost days (< 0 °C)
113 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
128.6 cm
Average feels-like high
11.2 °C
Average feels-like low
1.8 °C
Average peak gust
39.8 km/h
Tropical nights (≥ 20 °C)
12 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.39 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.0 °C
24 June 2025
Coldest day
-26.7 °C
13 February 1967
Wettest day
119 mm
11 September 1954
Windiest day
60.8 km/h
31 August 1954
Strongest gust
134.3 km/h
26 February 2010
Hottest feels-like
44.3 °C
2 August 1975
Coldest feels-like
-33.3 °C
4 February 2023
Snowiest day
35.9 cm
18 February 1952
Sunniest day
14.9 h
16 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -0.2 °C | 0.0 °C | 42 mm | -47 mm |
| Feb | 0.3 °C | -0.7 °C | 93 mm | +9 mm |
| Mar | 8.0 °C | +2.7 °C | 105 mm | +4 mm |
| Apr | 13.4 °C | +1.7 °C | 127 mm | +29 mm |
| May | 17.0 °C | -0.7 °C | 175 mm | +89 mm |
| Jun | 24.0 °C | +1.1 °C | 44 mm | -43 mm |
| Jul | 27.8 °C | +1.7 °C | 79 mm | -6 mm |
| Aug | 25.4 °C | +0.1 °C | 33 mm | -51 mm |
| Sep | 22.5 °C | +1.4 °C | 55 mm | -27 mm |
| Oct | 16.5 °C | +1.3 °C | 101 mm | +7 mm |
| Nov | 8.3 °C | -0.6 °C | 64 mm | -41 mm |
| Dec | 0.8 °C | -1.8 °C | 91 mm | -13 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Dover?
Dover has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.9 °C and it receives 1,099 mm of precipitation per year.
What is the hottest day ever recorded in Dover?
The hottest day measured in Dover between 1940 and 2025 was 24 June 2025, reaching 38.0 °C.
What is the coldest day in Dover?
The coldest day measured in Dover between 1940 and 2025 was 13 February 1967, at -26.7 °C.
Does it snow in Dover?
Yes. Dover gets on average 128.6 cm of snow per year and has around 113 frost days.
Has the climate of Dover warmed?
Yes: Dover warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dover?
The wettest day measured in Dover between 1940 and 2025 was 11 September 1954, with 119 mm of rain in 24 hours.
What was the windiest day in Dover?
The windiest day measured in Dover between 1940 and 2025 was 31 August 1954, with winds reaching 60.8 km/h.
What is the warmest month in Dover?
The warmest month in Dover is July (21.6 °C on average); the coldest is January (-4.1 °C).
How much does it rain in Dover?
Dover receives on average 1,099 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Dover?
Dover gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Dover?
The heaviest 24-hour snowfall measured in Dover between 1940 and 2025 was 18 February 1952, with 35.9 cm.
Are there tropical nights in Dover?
Yes: Dover has on average 12 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Dover?
In Dover, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 2 August 1975, and the lowest was -33.3 °C on 4 February 2023.
Compare Dover with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dover