Mount Vernon climate — normals and trends

Q: What is the climate of Mount Vernon?

Mount Vernon has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 1,067 mm of precipitation per year.

Q: What is the hottest day ever recorded in Mount Vernon?

The hottest day measured in Mount Vernon between 1940 and 2025 was 16 July 1988, reaching 37.8 °C.

Q: What is the coldest day in Mount Vernon?

The coldest day measured in Mount Vernon between 1940 and 2025 was 19 January 1994, at -31.0 °C.

Q: Does it snow in Mount Vernon?

Yes. Mount Vernon gets on average 73.0 cm of snow per year and has around 109 frost days.

Q: Has the climate of Mount Vernon warmed?

Yes: Mount Vernon warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Mount Vernon?

The wettest day measured in Mount Vernon between 1940 and 2025 was 14 September 1979, with 112 mm of rain in 24 hours.

Q: What was the windiest day in Mount Vernon?

The windiest day measured in Mount Vernon between 1940 and 2025 was 25 March 1947, with winds reaching 47.1 km/h.

Q: What is the warmest month in Mount Vernon?

The warmest month in Mount Vernon is July (22.6 °C on average); the coldest is January (-2.9 °C).

Q: How much does it rain in Mount Vernon?

Mount Vernon receives on average 1,067 mm of precipitation per year, spread over about 136 rainy days.

Q: Is it sunny in Mount Vernon?

Mount Vernon gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.

Mount Vernon (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.4 °C and it receives 1,067 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 (22.6 °C on average) and the coldest is January (-2.9 °C). Rainfall peaks in May.

Mount Vernon averages 109 frost days, 19 hot days (≥ 30 °C) and 136 rainy days per year.

Mount Vernon has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.

The number of frost days there went from about 121 to 97 per year over the period.

The hottest day of the period reached 37.8 °C (on 16 July 1988) and the coldest -31.0 °C (on 19 January 1994).

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

Mount VernonOhio

coords: 40.39°, -82.49°
period: 1940–2025 · 86 yrs

DfaHot-summer humid continentalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthOctober

Mean daily temperature

10.4°C

Average daily high

15.1°C

Average daily low

5.9°C

Annual rainfall

1,067mm

Sunshine / day

8.5h

Mean relative humidity

71%

Average peak wind

17.7km/h

Seasonal range

25.5°C

Frost days (< 0 °C)

109 d/yr

Hot days (≥ 30 °C)

19 d/yr

Rainy days (≥ 1 mm)

136 d/yr

Annual snowfall

73.0 cm

Average feels-like high

13.3 °C

Average feels-like low

3.2 °C

Average peak gust

38.7 km/h

Tropical nights (≥ 20 °C)

22 d/yr

Solar radiation

14.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.38 · 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

16 July 1988

Coldest day

-31.0 °C

19 January 1994

Wettest day

112 mm

14 September 1979

Windiest day

47.1 km/h

25 March 1947

Strongest gust

112.3 km/h

25 March 1947

Hottest feels-like

41.7 °C

22 July 2011

Coldest feels-like

-37.0 °C

19 January 1994

Snowiest day

25.8 cm

1 December 1974

Sunniest day

14.9 h

26 June 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	33.7 °C23 June 2025	-24.8 °C22 January 2025	11.0 °C	1,056 mm	23	103
2024	33.5 °C27 August 2024	-15.9 °C15 January 2024	12.5 °C	1,100 mm	26	73
2023	31.4 °C3 June 2023	-13.4 °C3 February 2023	12.1 °C	1,124 mm	8	72
2022	34.8 °C15 June 2022	-23.1 °C23 December 2022	11.2 °C	1,100 mm	23	103
2021	32.5 °C29 June 2021	-19.7 °C17 February 2021	12.1 °C	1,088 mm	23	98
2020	32.8 °C9 July 2020	-11.9 °C27 December 2020	11.8 °C	1,146 mm	31	87
2019	33.4 °C13 September 2019	-25.0 °C31 January 2019	11.5 °C	1,221 mm	25	101
2018	33.5 °C17 June 2018	-20.3 °C1 January 2018	11.3 °C	1,477 mm	31	117
2017	31.7 °C12 June 2017	-17.0 °C27 December 2017	11.9 °C	1,140 mm	15	85
2016	32.2 °C11 June 2016	-18.6 °C14 February 2016	12.0 °C	997 mm	31	100
2015	32.0 °C29 July 2015	-23.0 °C20 February 2015	11.0 °C	1,100 mm	11	94
2014	32.0 °C18 June 2014	-26.5 °C28 January 2014	9.7 °C	1,046 mm	9	116
2013	33.0 °C10 September 2013	-16.1 °C22 January 2013	10.5 °C	1,097 mm	11	122
2012	37.3 °C7 July 2012	-15.5 °C20 January 2012	12.3 °C	830 mm	42	91
2011	36.0 °C21 July 2011	-22.2 °C10 February 2011	11.3 °C	1,379 mm	42	98
2010	34.3 °C23 July 2010	-18.5 °C8 February 2010	11.0 °C	841 mm	32	106
2009	32.4 °C25 June 2009	-27.0 °C16 January 2009	10.3 °C	973 mm	7	96
2008	32.9 °C3 September 2008	-18.9 °C22 December 2008	10.3 °C	1,096 mm	21	120
2007	33.0 °C24 August 2007	-20.4 °C6 February 2007	11.2 °C	990 mm	32	111
2006	32.6 °C16 July 2006	-15.9 °C19 February 2006	11.4 °C	1,140 mm	16	90
2005	33.5 °C4 August 2005	-21.8 °C24 January 2005	10.8 °C	1,030 mm	32	102
2004	30.7 °C22 July 2004	-22.7 °C20 December 2004	10.5 °C	1,164 mm	2	98
2003	31.0 °C26 June 2003	-22.3 °C27 January 2003	10.1 °C	1,188 mm	5	114
2002	34.1 °C1 August 2002	-15.2 °C4 March 2002	11.4 °C	983 mm	36	105
2001	32.8 °C8 August 2001	-15.0 °C3 January 2001	11.1 °C	1,060 mm	14	96
2000	31.6 °C11 June 2000	-21.6 °C23 December 2000	10.2 °C	1,093 mm	5	109
1999	36.0 °C31 July 1999	-23.0 °C5 January 1999	11.2 °C	869 mm	34	103
1998	33.3 °C25 June 1998	-14.4 °C23 December 1998	12.2 °C	924 mm	22	83
1997	31.5 °C27 July 1997	-21.4 °C19 January 1997	9.8 °C	1,063 mm	10	110
1996	31.7 °C30 June 1996	-20.1 °C4 February 1996	9.6 °C	1,409 mm	9	120
1995	34.2 °C15 July 1995	-22.1 °C12 February 1995	10.1 °C	1,128 mm	26	118
1994	34.2 °C18 June 1994	-31.0 °C19 January 1994	10.4 °C	932 mm	19	102
1993	34.6 °C28 July 1993	-22.3 °C25 February 1993	10.3 °C	1,085 mm	28	97
1992	30.9 °C14 July 1992	-24.0 °C19 January 1992	10.0 °C	1,027 mm	4	103
1991	34.5 °C2 August 1991	-19.0 °C25 January 1991	11.8 °C	743 mm	44	104
1990	34.6 °C4 July 1990	-19.7 °C26 February 1990	11.5 °C	1,422 mm	14	95
1989	33.5 °C10 July 1989	-26.7 °C22 December 1989	9.8 °C	1,098 mm	15	115
1988	37.8 °C16 July 1988	-20.4 °C5 January 1988	10.2 °C	1,004 mm	44	122
1987	33.2 °C2 August 1987	-18.6 °C24 January 1987	11.3 °C	982 mm	31	105
1986	33.3 °C18 July 1986	-17.8 °C28 January 1986	11.0 °C	1,057 mm	16	99
1985	33.5 °C13 August 1985	-29.5 °C20 January 1985	10.3 °C	1,070 mm	14	100
1984	32.0 °C9 June 1984	-29.6 °C21 January 1984	10.3 °C	1,252 mm	12	104
1983	34.2 °C20 August 1983	-25.6 °C25 December 1983	10.7 °C	1,110 mm	41	103
1982	31.2 °C6 July 1982	-28.5 °C17 January 1982	10.3 °C	1,104 mm	9	105
1981	31.7 °C8 July 1981	-22.5 °C5 January 1981	9.9 °C	1,058 mm	7	115
1980	34.8 °C20 July 1980	-21.8 °C25 December 1980	9.6 °C	1,182 mm	18	118
1979	30.8 °C16 July 1979	-23.5 °C11 January 1979	9.5 °C	1,284 mm	2	117
1978	32.9 °C22 July 1978	-19.2 °C10 January 1978	9.2 °C	1,096 mm	18	120
1977	33.2 °C6 July 1977	-26.9 °C17 January 1977	10.0 °C	1,172 mm	18	109
1976	32.4 °C14 July 1976	-21.1 °C2 February 1976	9.3 °C	910 mm	8	128
1975	32.9 °C1 August 1975	-23.3 °C10 February 1975	10.5 °C	1,184 mm	13	117
1974	33.7 °C14 July 1974	-19.5 °C13 January 1974	10.1 °C	1,183 mm	7	108
1973	33.4 °C28 August 1973	-23.8 °C17 February 1973	11.2 °C	1,269 mm	18	95
1972	31.8 °C21 July 1972	-25.8 °C16 January 1972	9.4 °C	1,084 mm	6	117
1971	34.4 °C28 June 1971	-23.4 °C2 February 1971	10.2 °C	861 mm	11	119
1970	32.9 °C1 July 1970	-25.6 °C22 January 1970	10.2 °C	1,023 mm	12	113
1969	32.1 °C27 June 1969	-17.7 °C1 January 1969	9.6 °C	980 mm	10	127
1968	32.4 °C6 August 1968	-24.7 °C8 January 1968	9.8 °C	1,071 mm	16	117
1967	32.2 °C15 June 1967	-23.0 °C8 February 1967	9.6 °C	1,081 mm	8	108
1966	34.4 °C3 July 1966	-20.3 °C28 January 1966	9.6 °C	1,041 mm	20	115
1965	33.3 °C15 August 1965	-22.0 °C17 January 1965	10.2 °C	969 mm	14	114
1964	33.3 °C10 September 1964	-16.9 °C27 February 1964	10.4 °C	1,081 mm	28	116
1963	32.4 °C26 June 1963	-28.9 °C24 January 1963	9.1 °C	794 mm	12	113
1962	33.9 °C20 August 1962	-22.5 °C10 January 1962	9.7 °C	900 mm	20	121
1961	32.3 °C1 July 1961	-24.6 °C25 January 1961	10.0 °C	999 mm	12	106
1960	31.6 °C1 September 1960	-22.3 °C22 December 1960	9.6 °C	872 mm	12	124
1959	32.9 °C1 July 1959	-21.9 °C5 January 1959	10.7 °C	1,156 mm	33	121
1958	31.1 °C5 July 1958	-23.8 °C10 December 1958	9.2 °C	1,034 mm	8	112
1957	33.2 °C20 July 1957	-22.6 °C17 January 1957	10.4 °C	1,113 mm	17	108
1956	33.2 °C27 July 1956	-16.2 °C23 January 1956	10.4 °C	1,006 mm	13	113
1955	34.6 °C2 August 1955	-21.5 °C28 January 1955	10.8 °C	920 mm	40	118
1954	35.6 °C5 September 1954	-18.7 °C20 December 1954	10.8 °C	1,020 mm	22	114
1953	35.6 °C2 September 1953	-18.6 °C18 December 1953	11.3 °C	775 mm	39	95
1952	34.5 °C26 June 1952	-13.7 °C30 January 1952	10.8 °C	977 mm	34	114
1951	35.3 °C31 August 1951	-25.6 °C16 December 1951	9.8 °C	1,261 mm	18	113
1950	32.2 °C17 August 1950	-24.3 °C27 December 1950	9.5 °C	1,368 mm	6	127
1949	33.9 °C3 July 1949	-17.4 °C30 January 1949	11.2 °C	1,099 mm	29	109
1948	34.9 °C27 August 1948	-22.9 °C9 February 1948	10.2 °C	1,243 mm	22	99
1947	31.3 °C5 August 1947	-18.0 °C5 February 1947	9.3 °C	1,032 mm	9	131
1946	32.2 °C19 July 1946	-21.6 °C27 January 1946	10.6 °C	1,056 mm	3	94
1945	31.6 °C28 June 1945	-19.2 °C9 January 1945	9.7 °C	1,163 mm	9	109
1944	33.0 °C10 August 1944	-20.4 °C13 February 1944	10.1 °C	946 mm	18	122
1943	31.7 °C1 September 1943	-22.7 °C20 January 1943	8.9 °C	847 mm	6	139
1942	32.6 °C2 August 1942	-22.8 °C8 January 1942	9.3 °C	1,046 mm	4	129
1941	32.6 °C30 July 1941	-21.2 °C4 February 1941	9.7 °C	818 mm	11	123
1940	33.8 °C29 July 1940	-27.2 °C19 January 1940	8.3 °C	1,069 mm	17	136

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

15.8 °C

+0.7 °C

Hot days (≥ 30 °C)

23 d/yr

Frost days (< 0 °C)

103 d/yr

-6

Annual rainfall

1056 mm

-11 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	-1.8 °C	-2.8 °C	40 mm	-42 mm
Feb	2.5 °C	-0.4 °C	106 mm	+33 mm
Mar	13.6 °C	+5.0 °C	84 mm	-18 mm
Apr	17.2 °C	+1.8 °C	146 mm	+37 mm
May	19.5 °C	-1.5 °C	156 mm	+45 mm
Jun	27.4 °C	+1.7 °C	138 mm	+36 mm
Jul	28.7 °C	+1.2 °C	104 mm	+8 mm
Aug	26.0 °C	-0.7 °C	28 mm	-53 mm
Sep	25.9 °C	+2.7 °C	44 mm	-30 mm
Oct	18.0 °C	+1.1 °C	91 mm	+21 mm
Nov	9.2 °C	-0.2 °C	50 mm	-34 mm
Dec	3.0 °C	-0.3 °C	69 mm	-15 mm

The year's extremes

Hottest day

33.7 °C

23 Jun 2025

Coldest day

-24.8 °C

22 Jan 2025

Wettest day

34.9 mm

16 Feb 2025

Windiest day

37.8 km/h

15 Apr 2025

Strongest gust

91.4 km/h

29 Dec 2025

Hottest feels-like

38.3 °C

25 Jun 2025

Coldest feels-like

-30.4 °C

22 Jan 2025

Snowiest day

5.3 cm

2 Dec 2025

Sunniest day

14.9 h

21 Jun 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 Mount Vernon?

Mount Vernon has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 1,067 mm of precipitation per year.

What is the hottest day ever recorded in Mount Vernon?

The hottest day measured in Mount Vernon between 1940 and 2025 was 16 July 1988, reaching 37.8 °C.

What is the coldest day in Mount Vernon?

The coldest day measured in Mount Vernon between 1940 and 2025 was 19 January 1994, at -31.0 °C.

Does it snow in Mount Vernon?

Yes. Mount Vernon gets on average 73.0 cm of snow per year and has around 109 frost days.

Has the climate of Mount Vernon warmed?

Yes: Mount Vernon warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Mount Vernon?

The wettest day measured in Mount Vernon between 1940 and 2025 was 14 September 1979, with 112 mm of rain in 24 hours.

What was the windiest day in Mount Vernon?

The windiest day measured in Mount Vernon between 1940 and 2025 was 25 March 1947, with winds reaching 47.1 km/h.

What is the warmest month in Mount Vernon?

The warmest month in Mount Vernon is July (22.6 °C on average); the coldest is January (-2.9 °C).

How much does it rain in Mount Vernon?

Mount Vernon receives on average 1,067 mm of precipitation per year, spread over about 136 rainy days.

Is it sunny in Mount Vernon?

Mount Vernon gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.

What is the biggest single-day snowfall in Mount Vernon?

The heaviest 24-hour snowfall measured in Mount Vernon between 1940 and 2025 was 1 December 1974, with 25.8 cm.

Are there tropical nights in Mount Vernon?

Yes: Mount Vernon has on average 22 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Mount Vernon?

In Mount Vernon, between 1940 and 2025, the highest apparent temperature reached 41.7 °C on 22 July 2011, and the lowest was -37.0 °C on 19 January 1994.

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