Portsmouth Heights climate — normals and trends

Q: What is the climate of Portsmouth Heights?

Portsmouth Heights has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 1,138 mm of precipitation per year.

Q: What is the hottest day ever recorded in Portsmouth Heights?

The hottest day measured in Portsmouth Heights between 1940 and 2025 was 23 July 2011, reaching 39.4 °C.

Q: What is the coldest day in Portsmouth Heights?

The coldest day measured in Portsmouth Heights between 1940 and 2025 was 21 January 1985, at -19.5 °C.

Q: Does it snow in Portsmouth Heights?

Yes. Portsmouth Heights gets on average 14.9 cm of snow per year and has around 40 frost days.

Q: Has the climate of Portsmouth Heights warmed?

Yes: Portsmouth Heights warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Portsmouth Heights?

The wettest day measured in Portsmouth Heights between 1940 and 2025 was 27 August 2011, with 157 mm of rain in 24 hours.

Q: What was the windiest day in Portsmouth Heights?

The windiest day measured in Portsmouth Heights between 1940 and 2025 was 18 September 2003, with winds reaching 73.2 km/h.

Q: What is the warmest month in Portsmouth Heights?

The warmest month in Portsmouth Heights is July (25.9 °C on average); the coldest is January (4.9 °C).

Q: How much does it rain in Portsmouth Heights?

Portsmouth Heights receives on average 1,138 mm of precipitation per year, spread over about 126 rainy days.

Q: Is it sunny in Portsmouth Heights?

Portsmouth Heights gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

Portsmouth Heights (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °C and it receives 1,138 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 (25.9 °C on average) and the coldest is January (4.9 °C). Rainfall peaks in July.

Portsmouth Heights averages 40 frost days, 47 hot days (≥ 30 °C) and 126 rainy days per year.

Portsmouth Heights has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.

The hottest day of the period reached 39.4 °C (on 23 July 2011) and the coldest -19.5 °C (on 21 January 1985).

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

Portsmouth HeightsVirginia

coords: 36.82°, -76.37°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthJulyDriest monthOctober

Mean daily temperature

15.5°C

Average daily high

20.0°C

Average daily low

11.5°C

Annual rainfall

1,138mm

Sunshine / day

9.4h

Mean relative humidity

73%

Average peak wind

18.6km/h

Seasonal range

21.0°C

Frost days (< 0 °C)

40 d/yr

Hot days (≥ 30 °C)

47 d/yr

Rainy days (≥ 1 mm)

126 d/yr

Annual snowfall

14.9 cm

Average feels-like high

19.8 °C

Average feels-like low

10.0 °C

Average peak gust

38.4 km/h

Tropical nights (≥ 20 °C)

83 d/yr

Solar radiation

15.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.23 · 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

39.4 °C

23 July 2011

Coldest day

-19.5 °C

21 January 1985

Wettest day

157 mm

27 August 2011

Windiest day

73.2 km/h

18 September 2003

Strongest gust

153.0 km/h

18 September 2003

Hottest feels-like

44.4 °C

1 August 1999

Coldest feels-like

-26.6 °C

21 January 1985

Snowiest day

23.8 cm

26 January 1966

Sunniest day

14.0 h

14 May 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	36.1 °C25 June 2025	-9.0 °C23 January 2025	16.0 °C	1,188 mm	54	48
2024	35.6 °C26 June 2024	-6.9 °C22 January 2024	16.4 °C	1,069 mm	44	34
2023	35.8 °C15 August 2023	-5.7 °C4 February 2023	16.7 °C	1,107 mm	54	20
2022	35.8 °C17 June 2022	-9.9 °C23 January 2022	16.3 °C	1,019 mm	73	50
2021	34.9 °C13 August 2021	-4.6 °C30 January 2021	16.4 °C	1,102 mm	60	26
2020	36.3 °C28 July 2020	-4.7 °C22 February 2020	17.1 °C	1,505 mm	63	21
2019	37.1 °C22 July 2019	-6.9 °C22 January 2019	17.0 °C	1,160 mm	73	30
2018	36.1 °C19 June 2018	-15.0 °C6 January 2018	16.4 °C	1,372 mm	70	40
2017	34.8 °C13 July 2017	-10.3 °C9 January 2017	16.7 °C	1,223 mm	49	31
2016	34.9 °C14 August 2016	-9.0 °C14 February 2016	16.2 °C	1,572 mm	55	40
2015	36.5 °C16 June 2015	-15.2 °C21 February 2015	16.4 °C	1,205 mm	52	44
2014	35.6 °C2 September 2014	-19.1 °C30 January 2014	15.4 °C	1,266 mm	45	48
2013	34.6 °C13 June 2013	-6.2 °C23 January 2013	15.7 °C	1,317 mm	57	43
2012	38.0 °C8 July 2012	-6.0 °C13 February 2012	16.5 °C	1,304 mm	47	16
2011	39.4 °C23 July 2011	-8.8 °C23 January 2011	16.3 °C	982 mm	66	39
2010	38.5 °C25 July 2010	-9.5 °C1 February 2010	15.8 °C	964 mm	83	57
2009	33.7 °C20 June 2009	-11.3 °C17 January 2009	15.7 °C	1,424 mm	41	43
2008	36.3 °C10 June 2008	-9.3 °C21 January 2008	16.0 °C	1,100 mm	46	32
2007	38.0 °C8 August 2007	-8.7 °C6 February 2007	16.2 °C	712 mm	56	43
2006	35.7 °C3 August 2006	-6.4 °C27 February 2006	16.1 °C	1,320 mm	47	18
2005	37.4 °C27 July 2005	-8.7 °C19 January 2005	15.5 °C	1,068 mm	57	41
2004	34.5 °C18 June 2004	-8.1 °C20 December 2004	15.6 °C	1,077 mm	32	42
2003	34.7 °C9 July 2003	-10.1 °C27 January 2003	15.2 °C	1,505 mm	38	47
2002	35.7 °C24 August 2002	-6.2 °C5 January 2002	16.3 °C	1,160 mm	50	33
2001	34.9 °C11 July 2001	-6.4 °C4 January 2001	16.0 °C	725 mm	27	33
2000	34.3 °C10 July 2000	-11.5 °C28 January 2000	15.2 °C	1,137 mm	34	40
1999	39.3 °C1 August 1999	-8.2 °C6 January 1999	16.2 °C	1,126 mm	44	26
1998	35.5 °C22 July 1998	-5.7 °C1 January 1998	16.5 °C	1,229 mm	47	13
1997	35.8 °C26 June 1997	-11.3 °C19 January 1997	15.1 °C	1,171 mm	32	27
1996	34.6 °C20 May 1996	-13.0 °C5 February 1996	14.9 °C	1,291 mm	29	49
1995	34.4 °C23 July 1995	-8.7 °C6 February 1995	15.4 °C	1,048 mm	42	39
1994	34.2 °C9 July 1994	-13.7 °C19 January 1994	16.0 °C	1,137 mm	49	25
1993	36.4 °C10 July 1993	-8.5 °C30 December 1993	15.5 °C	1,043 mm	55	40
1992	36.7 °C13 July 1992	-6.5 °C20 January 1992	14.9 °C	1,280 mm	31	37
1991	36.6 °C23 July 1991	-6.9 °C16 February 1991	16.5 °C	1,003 mm	61	32
1990	36.5 °C10 July 1990	-6.3 °C26 February 1990	16.8 °C	869 mm	49	22
1989	36.2 °C2 June 1989	-12.7 °C25 December 1989	15.4 °C	1,503 mm	45	47
1988	36.0 °C17 August 1988	-8.0 °C7 February 1988	14.9 °C	1,020 mm	59	56
1987	36.1 °C3 August 1987	-10.1 °C28 January 1987	15.2 °C	961 mm	59	45
1986	37.2 °C19 July 1986	-11.5 °C29 January 1986	15.7 °C	959 mm	62	46
1985	34.6 °C6 September 1985	-19.5 °C21 January 1985	15.9 °C	1,102 mm	54	52
1984	35.5 °C14 June 1984	-9.8 °C22 January 1984	15.5 °C	1,100 mm	44	45
1983	37.7 °C20 August 1983	-13.1 °C25 December 1983	15.5 °C	1,252 mm	59	29
1982	33.6 °C31 May 1982	-13.4 °C11 January 1982	15.3 °C	1,260 mm	32	43
1981	36.5 °C22 June 1981	-11.5 °C13 January 1981	14.6 °C	1,127 mm	49	64
1980	37.8 °C1 August 1980	-12.4 °C13 February 1980	15.1 °C	839 mm	67	48
1979	35.4 °C10 August 1979	-11.4 °C10 February 1979	15.2 °C	1,112 mm	31	49
1978	34.7 °C23 July 1978	-10.3 °C5 February 1978	14.6 °C	1,086 mm	55	67
1977	37.1 °C8 July 1977	-15.5 °C17 January 1977	15.2 °C	1,260 mm	65	66
1976	36.0 °C24 July 1976	-9.2 °C19 January 1976	14.9 °C	970 mm	36	58
1975	34.6 °C25 August 1975	-6.6 °C19 December 1975	15.9 °C	1,211 mm	47	30
1974	34.6 °C23 June 1974	-4.9 °C27 February 1974	15.6 °C	1,145 mm	32	27
1973	33.9 °C4 July 1973	-12.9 °C10 January 1973	15.6 °C	1,179 mm	39	39
1972	35.3 °C24 July 1972	-12.7 °C16 January 1972	14.9 °C	1,277 mm	30	34
1971	33.9 °C28 June 1971	-10.6 °C2 February 1971	15.3 °C	1,126 mm	33	39
1970	33.8 °C2 August 1970	-13.1 °C10 January 1970	14.8 °C	971 mm	44	55
1969	35.0 °C18 July 1969	-9.4 °C6 January 1969	14.4 °C	1,071 mm	41	51
1968	35.2 °C25 August 1968	-9.9 °C27 February 1968	14.7 °C	1,029 mm	45	67
1967	34.9 °C25 June 1967	-8.8 °C25 February 1967	14.4 °C	1,107 mm	25	44
1966	35.7 °C13 July 1966	-12.3 °C31 January 1966	14.3 °C	1,122 mm	37	53
1965	34.8 °C19 August 1965	-15.4 °C1 February 1965	14.6 °C	848 mm	50	56
1964	36.4 °C10 June 1964	-7.5 °C15 January 1964	15.0 °C	1,257 mm	39	38
1963	34.5 °C20 July 1963	-8.6 °C29 January 1963	14.1 °C	1,053 mm	31	61
1962	33.7 °C23 July 1962	-9.9 °C13 December 1962	14.6 °C	1,301 mm	29	44
1961	34.0 °C29 July 1961	-9.0 °C29 January 1961	15.0 °C	1,267 mm	47	45
1960	34.9 °C24 June 1960	-8.5 °C13 December 1960	14.7 °C	1,156 mm	43	59
1959	34.6 °C30 June 1959	-9.5 °C18 January 1959	15.7 °C	1,114 mm	50	40
1958	34.5 °C31 July 1958	-12.6 °C16 December 1958	14.3 °C	1,214 mm	46	56
1957	35.8 °C19 June 1957	-12.8 °C18 January 1957	15.7 °C	1,279 mm	58	26
1956	35.3 °C27 June 1956	-6.1 °C28 January 1956	15.5 °C	1,108 mm	54	37
1955	35.9 °C28 July 1955	-10.3 °C31 January 1955	15.2 °C	1,103 mm	44	56
1954	36.6 °C3 July 1954	-10.6 °C8 December 1954	15.6 °C	1,039 mm	50	39
1953	35.2 °C2 July 1953	-6.1 °C18 December 1953	16.2 °C	1,177 mm	53	23
1952	38.1 °C23 July 1952	-7.2 °C31 January 1952	15.7 °C	1,084 mm	64	26
1951	35.1 °C2 June 1951	-7.8 °C17 December 1951	15.3 °C	1,074 mm	42	38
1950	35.0 °C27 June 1950	-5.8 °C3 March 1950	15.3 °C	948 mm	33	37
1949	35.6 °C25 July 1949	-3.3 °C1 March 1949	16.2 °C	1,151 mm	42	21
1948	36.0 °C29 August 1948	-10.8 °C27 December 1948	15.5 °C	1,179 mm	44	37
1947	34.2 °C11 June 1947	-8.1 °C9 February 1947	15.4 °C	1,000 mm	36	38
1946	33.6 °C18 June 1946	-5.5 °C28 January 1946	16.1 °C	1,073 mm	17	23
1945	35.5 °C30 June 1945	-4.4 °C1 February 1945	16.0 °C	1,358 mm	31	29
1944	35.9 °C19 June 1944	-9.3 °C10 January 1944	15.8 °C	1,269 mm	47	17
1943	34.1 °C22 July 1943	-6.1 °C15 February 1943	15.6 °C	892 mm	52	31
1942	36.7 °C20 July 1942	-9.8 °C11 January 1942	16.0 °C	1,139 mm	40	32
1941	34.5 °C28 July 1941	-5.5 °C1 March 1941	15.8 °C	1,042 mm	50	32
1940	35.4 °C27 July 1940	-11.2 °C28 January 1940	15.0 °C	1,164 mm	31	38

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

20.5 °C

+0.5 °C

Hot days (≥ 30 °C)

54 d/yr

Frost days (< 0 °C)

48 d/yr

Annual rainfall

1188 mm

+50 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	7.1 °C	-2.1 °C	49 mm	-39 mm
Feb	11.2 °C	+0.6 °C	125 mm	+41 mm
Mar	18.2 °C	+3.7 °C	54 mm	-40 mm
Apr	22.8 °C	+3.0 °C	102 mm	+21 mm
May	25.2 °C	+1.2 °C	125 mm	+31 mm
Jun	30.4 °C	+2.3 °C	119 mm	+24 mm
Jul	31.6 °C	+1.5 °C	145 mm	+15 mm
Aug	27.2 °C	-2.0 °C	97 mm	-28 mm
Sep	25.6 °C	-0.7 °C	132 mm	+25 mm
Oct	20.4 °C	-0.8 °C	81 mm	+2 mm
Nov	16.7 °C	+0.6 °C	59 mm	-22 mm
Dec	9.7 °C	-1.5 °C	100 mm	+20 mm

The year's extremes

Hottest day

36.1 °C

25 Jun 2025

Coldest day

-9.0 °C

23 Jan 2025

Wettest day

62.2 mm

16 Sep 2025

Windiest day

49.0 km/h

5 Mar 2025

Strongest gust

107.3 km/h

16 Feb 2025

Hottest feels-like

43.4 °C

24 Jun 2025

Coldest feels-like

-14.0 °C

14 Dec 2025

Snowiest day

10.5 cm

19 Feb 2025

Sunniest day

14.0 h

18 May 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 Portsmouth Heights?

Portsmouth Heights has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 1,138 mm of precipitation per year.

What is the hottest day ever recorded in Portsmouth Heights?

The hottest day measured in Portsmouth Heights between 1940 and 2025 was 23 July 2011, reaching 39.4 °C.

What is the coldest day in Portsmouth Heights?

The coldest day measured in Portsmouth Heights between 1940 and 2025 was 21 January 1985, at -19.5 °C.

Does it snow in Portsmouth Heights?

Yes. Portsmouth Heights gets on average 14.9 cm of snow per year and has around 40 frost days.

Has the climate of Portsmouth Heights warmed?

Yes: Portsmouth Heights warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Portsmouth Heights?

The wettest day measured in Portsmouth Heights between 1940 and 2025 was 27 August 2011, with 157 mm of rain in 24 hours.

What was the windiest day in Portsmouth Heights?

The windiest day measured in Portsmouth Heights between 1940 and 2025 was 18 September 2003, with winds reaching 73.2 km/h.

What is the warmest month in Portsmouth Heights?

The warmest month in Portsmouth Heights is July (25.9 °C on average); the coldest is January (4.9 °C).

How much does it rain in Portsmouth Heights?

Portsmouth Heights receives on average 1,138 mm of precipitation per year, spread over about 126 rainy days.

Is it sunny in Portsmouth Heights?

Portsmouth Heights gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

What is the biggest single-day snowfall in Portsmouth Heights?

The heaviest 24-hour snowfall measured in Portsmouth Heights between 1940 and 2025 was 26 January 1966, with 23.8 cm.

Are there tropical nights in Portsmouth Heights?

Yes: Portsmouth Heights has on average 83 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Portsmouth Heights?

In Portsmouth Heights, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 1 August 1999, and the lowest was -26.6 °C on 21 January 1985.

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