Dover climate — normals and trends

Q: What is the climate of Dover?

Dover has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.6 °C and it receives 1,074 mm of precipitation per year.

Q: What is the hottest day ever recorded in Dover?

The hottest day measured in Dover between 1940 and 2025 was 23 July 2011, reaching 37.8 °C.

Q: What is the coldest day in Dover?

The coldest day measured in Dover between 1940 and 2025 was 18 February 1979, at -19.8 °C.

Q: Does it snow in Dover?

Yes. Dover gets on average 38.0 cm of snow per year and has around 61 frost days.

Q: Has the climate of Dover warmed?

Yes: Dover warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Dover?

The wettest day measured in Dover between 1940 and 2025 was 16 September 1999, with 136 mm of rain in 24 hours.

Q: What was the windiest day in Dover?

The windiest day measured in Dover between 1940 and 2025 was 15 October 1954, with winds reaching 61.4 km/h.

Q: What is the warmest month in Dover?

The warmest month in Dover is July (25.2 °C on average); the coldest is January (1.8 °C).

Q: How much does it rain in Dover?

Dover receives on average 1,074 mm of precipitation per year, spread over about 115 rainy days.

Q: Is it sunny in Dover?

Dover gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

Dover (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.6 °C and it receives 1,074 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 (25.2 °C on average) and the coldest is January (1.8 °C). Rainfall peaks in August.

Dover averages 61 frost days, 34 hot days (≥ 30 °C) and 115 rainy days per year.

Dover has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.

The number of frost days there went from about 67 to 55 per year over the period.

The hottest day of the period reached 37.8 °C (on 23 July 2011) and the coldest -19.8 °C (on 18 February 1979).

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

DoverDelaware

coords: 39.16°, -75.52°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthFebruary

Mean daily temperature

13.6°C

Average daily high

17.7°C

Average daily low

9.7°C

Annual rainfall

1,074mm

Sunshine / day

9.2h

Mean relative humidity

67%

Average peak wind

19.1km/h

Seasonal range

23.4°C

Frost days (< 0 °C)

61 d/yr

Hot days (≥ 30 °C)

34 d/yr

Rainy days (≥ 1 mm)

115 d/yr

Annual snowfall

38.0 cm

Average feels-like high

16.5 °C

Average feels-like low

7.4 °C

Average peak gust

39.3 km/h

Tropical nights (≥ 20 °C)

64 d/yr

Solar radiation

15.4 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.4 °C

since 1940

+0.2 °C per decade · r² = 0.32 · p = < 0.001

19402025

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

37.8 °C

23 July 2011

Coldest day

-19.8 °C

18 February 1979

Wettest day

136 mm

16 September 1999

Windiest day

61.4 km/h

15 October 1954

Strongest gust

140.8 km/h

9 January 2024

Hottest feels-like

43.9 °C

15 July 1995

Coldest feels-like

-27.1 °C

21 January 1985

Snowiest day

34.9 cm

6 February 2010

Sunniest day

14.1 h

23 June 1949

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	36.4 °C24 June 2025	-12.0 °C23 January 2025	14.1 °C	1,048 mm	35	66
2024	36.5 °C16 July 2024	-10.6 °C22 January 2024	14.9 °C	1,040 mm	37	47
2023	35.6 °C27 July 2023	-8.7 °C4 February 2023	15.1 °C	1,077 mm	35	28
2022	34.4 °C24 July 2022	-12.6 °C24 December 2022	14.3 °C	1,302 mm	44	72
2021	34.6 °C30 June 2021	-5.3 °C8 February 2021	15.0 °C	1,233 mm	50	47
2020	35.0 °C3 July 2020	-7.3 °C15 February 2020	15.1 °C	1,441 mm	49	33
2019	36.2 °C22 July 2019	-13.5 °C31 January 2019	14.7 °C	1,115 mm	55	55
2018	34.3 °C29 August 2018	-15.4 °C7 January 2018	14.5 °C	1,518 mm	45	53
2017	33.8 °C13 July 2017	-12.2 °C9 January 2017	14.9 °C	1,100 mm	36	50
2016	35.9 °C14 August 2016	-11.6 °C14 February 2016	14.6 °C	1,082 mm	50	49
2015	35.4 °C23 June 2015	-15.8 °C20 February 2015	14.3 °C	1,139 mm	34	65
2014	33.6 °C8 July 2014	-15.2 °C4 January 2014	13.0 °C	1,090 mm	19	75
2013	34.5 °C19 July 2013	-10.1 °C23 January 2013	13.7 °C	1,057 mm	33	63
2012	36.7 °C18 July 2012	-8.7 °C4 January 2012	15.1 °C	980 mm	40	33
2011	37.8 °C23 July 2011	-9.9 °C24 January 2011	14.8 °C	1,238 mm	50	58
2010	37.4 °C6 July 2010	-9.7 °C31 January 2010	14.5 °C	1,057 mm	64	70
2009	33.5 °C10 August 2009	-14.2 °C17 January 2009	13.5 °C	1,313 mm	19	70
2008	36.4 °C10 June 2008	-9.3 °C11 February 2008	14.2 °C	978 mm	42	53
2007	35.3 °C8 August 2007	-11.5 °C6 February 2007	14.1 °C	935 mm	46	55
2006	35.4 °C3 August 2006	-9.4 °C19 February 2006	14.6 °C	975 mm	33	39
2005	36.5 °C27 July 2005	-14.6 °C28 January 2005	13.6 °C	978 mm	31	65
2004	32.6 °C18 June 2004	-14.1 °C10 January 2004	13.7 °C	1,066 mm	22	65
2003	33.9 °C5 July 2003	-12.1 °C18 January 2003	13.0 °C	1,389 mm	21	72
2002	34.6 °C4 July 2002	-8.9 °C10 December 2002	14.5 °C	1,051 mm	45	52
2001	35.6 °C9 August 2001	-5.7 °C18 February 2001	14.1 °C	834 mm	20	52
2000	33.6 °C7 August 2000	-12.2 °C18 January 2000	13.3 °C	1,015 mm	23	65
1999	36.4 °C1 August 1999	-9.1 °C2 January 1999	14.2 °C	1,058 mm	39	50
1998	35.6 °C23 July 1998	-10.2 °C25 December 1998	14.9 °C	880 mm	37	32
1997	35.1 °C18 July 1997	-13.8 °C19 January 1997	13.4 °C	948 mm	32	46
1996	33.1 °C20 May 1996	-15.5 °C5 February 1996	13.0 °C	1,401 mm	13	65
1995	36.2 °C15 July 1995	-13.2 °C6 February 1995	13.9 °C	919 mm	43	59
1994	34.9 °C15 June 1994	-18.9 °C19 January 1994	14.0 °C	1,041 mm	38	57
1993	36.7 °C10 July 1993	-11.6 °C7 February 1993	13.7 °C	1,018 mm	39	59
1992	34.9 °C15 July 1992	-10.0 °C19 January 1992	12.9 °C	998 mm	22	60
1991	36.0 °C23 July 1991	-10.1 °C23 January 1991	14.5 °C	1,048 mm	51	55
1990	35.3 °C5 July 1990	-9.8 °C26 February 1990	14.6 °C	1,005 mm	31	36
1989	34.0 °C27 June 1989	-13.8 °C19 December 1989	13.1 °C	1,395 mm	27	79
1988	35.8 °C11 July 1988	-14.0 °C11 January 1988	13.0 °C	1,011 mm	50	72
1987	36.1 °C21 July 1987	-17.2 °C28 January 1987	13.4 °C	981 mm	40	62
1986	35.1 °C7 July 1986	-11.6 °C28 January 1986	13.6 °C	1,018 mm	39	67
1985	34.7 °C14 August 1985	-19.0 °C21 January 1985	13.7 °C	859 mm	24	69
1984	33.7 °C10 June 1984	-16.3 °C21 January 1984	13.4 °C	1,126 mm	33	63
1983	36.8 °C20 August 1983	-16.0 °C25 December 1983	13.6 °C	1,331 mm	47	52
1982	33.2 °C18 July 1982	-19.1 °C17 January 1982	13.0 °C	982 mm	18	66
1981	34.0 °C25 June 1981	-15.3 °C13 January 1981	12.8 °C	951 mm	22	74
1980	35.8 °C20 July 1980	-13.7 °C25 December 1980	13.2 °C	836 mm	46	77
1979	33.9 °C10 August 1979	-19.8 °C18 February 1979	13.3 °C	1,257 mm	21	66
1978	34.2 °C23 July 1978	-15.7 °C20 February 1978	12.5 °C	1,256 mm	23	83
1977	35.1 °C21 July 1977	-16.9 °C17 January 1977	13.4 °C	1,027 mm	46	69
1976	32.2 °C27 June 1976	-12.6 °C4 December 1976	13.0 °C	927 mm	28	76
1975	34.4 °C3 August 1975	-7.4 °C19 December 1975	13.9 °C	1,289 mm	27	55
1974	34.0 °C10 July 1974	-8.7 °C27 February 1974	13.7 °C	961 mm	25	50
1973	35.1 °C28 August 1973	-12.3 °C17 February 1973	14.1 °C	1,179 mm	37	49
1972	34.9 °C23 July 1972	-14.3 °C16 January 1972	13.0 °C	1,197 mm	26	62
1971	33.3 °C8 July 1971	-11.9 °C2 February 1971	13.7 °C	1,139 mm	27	57
1970	33.4 °C4 July 1970	-14.4 °C9 January 1970	13.2 °C	811 mm	38	69
1969	34.1 °C18 July 1969	-9.8 °C5 January 1969	12.9 °C	1,227 mm	24	82
1968	35.7 °C25 August 1968	-16.5 °C12 January 1968	13.0 °C	910 mm	31	76
1967	32.5 °C24 July 1967	-14.5 °C13 February 1967	12.3 °C	958 mm	12	68
1966	37.1 °C3 July 1966	-14.2 °C29 January 1966	12.6 °C	892 mm	41	76
1965	34.9 °C19 August 1965	-13.8 °C18 January 1965	12.8 °C	626 mm	39	74
1964	35.2 °C10 June 1964	-14.5 °C15 January 1964	13.1 °C	1,111 mm	36	73
1963	34.0 °C27 July 1963	-18.3 °C29 January 1963	12.5 °C	878 mm	25	73
1962	34.0 °C19 May 1962	-15.0 °C11 February 1962	12.5 °C	1,079 mm	22	68
1961	33.2 °C22 July 1961	-17.9 °C2 February 1961	13.0 °C	1,165 mm	37	61
1960	33.3 °C23 July 1960	-13.1 °C24 December 1960	12.9 °C	1,010 mm	22	80
1959	36.9 °C29 June 1959	-10.9 °C20 February 1959	13.9 °C	1,013 mm	42	71
1958	33.7 °C31 July 1958	-14.5 °C17 February 1958	12.5 °C	1,350 mm	29	65
1957	37.2 °C22 July 1957	-14.6 °C17 January 1957	13.8 °C	966 mm	47	48
1956	35.4 °C2 July 1956	-9.9 °C28 January 1956	13.3 °C	1,084 mm	33	54
1955	35.6 °C22 July 1955	-15.6 °C3 February 1955	13.4 °C	993 mm	36	76
1954	36.6 °C31 July 1954	-13.1 °C18 January 1954	13.7 °C	868 mm	31	57
1953	36.1 °C31 August 1953	-7.2 °C18 December 1953	14.4 °C	1,062 mm	44	42
1952	36.9 °C26 June 1952	-10.6 °C30 January 1952	13.7 °C	1,268 mm	40	44
1951	33.4 °C1 August 1951	-9.6 °C17 December 1951	13.6 °C	943 mm	29	59
1950	32.9 °C27 June 1950	-11.2 °C27 December 1950	13.2 °C	1,085 mm	20	58
1949	36.2 °C28 July 1949	-8.9 °C12 February 1949	14.6 °C	881 mm	39	42
1948	35.6 °C26 August 1948	-17.0 °C19 January 1948	13.1 °C	1,377 mm	26	63
1947	32.5 °C14 August 1947	-12.5 °C5 February 1947	13.1 °C	995 mm	19	74
1946	32.4 °C20 July 1946	-8.2 °C23 January 1946	14.0 °C	984 mm	13	44
1945	35.0 °C1 July 1945	-13.5 °C25 January 1945	13.5 °C	1,185 mm	21	61
1944	34.7 °C5 August 1944	-7.7 °C6 March 1944	13.5 °C	1,207 mm	44	60
1943	33.7 °C2 September 1943	-14.0 °C15 February 1943	13.2 °C	907 mm	47	71
1942	34.6 °C19 July 1942	-14.7 °C21 December 1942	13.4 °C	1,278 mm	27	62
1941	35.3 °C28 July 1941	-8.1 °C1 March 1941	13.5 °C	933 mm	39	79
1940	34.9 °C26 July 1940	-13.0 °C20 January 1940	12.4 °C	1,167 mm	16	74

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?

Year

Across the whole year

Average daily high

18.0 °C

+0.3 °C

Hot days (≥ 30 °C)

35 d/yr

Frost days (< 0 °C)

66 d/yr

Annual rainfall

1048 mm

-26 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	3.0 °C	-2.3 °C	42 mm	-39 mm
Feb	6.7 °C	0.0 °C	77 mm	+1 mm
Mar	15.0 °C	+3.8 °C	96 mm	-2 mm
Apr	19.0 °C	+1.8 °C	81 mm	-8 mm
May	22.5 °C	+0.2 °C	139 mm	+49 mm
Jun	28.1 °C	+1.2 °C	135 mm	+48 mm
Jul	30.7 °C	+1.4 °C	223 mm	+123 mm
Aug	26.5 °C	-1.8 °C	34 mm	-72 mm
Sep	25.6 °C	+0.6 °C	81 mm	-11 mm
Oct	19.5 °C	+0.2 °C	46 mm	-37 mm
Nov	13.4 °C	+0.1 °C	37 mm	-47 mm
Dec	5.7 °C	-1.9 °C	59 mm	-30 mm

The year's extremes

Hottest day

36.4 °C

24 Jun 2025

Coldest day

-12.0 °C

23 Jan 2025

Wettest day

36.0 mm

28 May 2025

Windiest day

43.2 km/h

16 Feb 2025

Strongest gust

91.8 km/h

16 Feb 2025

Hottest feels-like

42.3 °C

23 Jun 2025

Coldest feels-like

-16.2 °C

23 Jan 2025

Snowiest day

11.0 cm

6 Jan 2025

Sunniest day

14.1 h

4 Jul 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Dover?

Dover has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.6 °C and it receives 1,074 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 23 July 2011, reaching 37.8 °C.

What is the coldest day in Dover?

The coldest day measured in Dover between 1940 and 2025 was 18 February 1979, at -19.8 °C.

Does it snow in Dover?

Yes. Dover gets on average 38.0 cm of snow per year and has around 61 frost days.

Has the climate of Dover warmed?

Yes: Dover warmed by +1.4 °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 16 September 1999, with 136 mm of rain in 24 hours.

What was the windiest day in Dover?

The windiest day measured in Dover between 1940 and 2025 was 15 October 1954, with winds reaching 61.4 km/h.

What is the warmest month in Dover?

The warmest month in Dover is July (25.2 °C on average); the coldest is January (1.8 °C).

How much does it rain in Dover?

Dover receives on average 1,074 mm of precipitation per year, spread over about 115 rainy days.

Is it sunny in Dover?

Dover gets on average 9.2 hours of sunshine per day, roughly 3,358 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 6 February 2010, with 34.9 cm.

Are there tropical nights in Dover?

Yes: Dover has on average 64 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 43.9 °C on 15 July 1995, and the lowest was -27.1 °C on 21 January 1985.

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