Edison climate — normals and trends

Q: What is the climate of Edison?

Edison has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 12.1 °C and it receives 1,136 mm of precipitation per year.

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

The hottest day measured in Edison between 1940 and 2025 was 3 July 1966, reaching 40.3 °C.

Q: What is the coldest day in Edison?

The coldest day measured in Edison between 1940 and 2025 was 22 January 1984, at -24.0 °C.

Q: Does it snow in Edison?

Yes. Edison gets on average 61.6 cm of snow per year and has around 84 frost days.

Q: Has the climate of Edison warmed?

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

Q: What is the wettest day in Edison?

The wettest day measured in Edison between 1940 and 2025 was 16 September 1999, with 153 mm of rain in 24 hours.

Q: What was the windiest day in Edison?

The windiest day measured in Edison between 1940 and 2025 was 29 October 2012, with winds reaching 54.9 km/h.

Q: What is the warmest month in Edison?

The warmest month in Edison is July (24.4 °C on average); the coldest is January (-0.4 °C).

Q: How much does it rain in Edison?

Edison receives on average 1,136 mm of precipitation per year, spread over about 119 rainy days.

Q: Is it sunny in Edison?

Edison gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.

Edison (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.1 °C and it receives 1,136 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 (24.4 °C on average) and the coldest is January (-0.4 °C). Rainfall peaks in July.

Edison averages 84 frost days, 35 hot days (≥ 30 °C) and 119 rainy days per year.

Edison 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 93 to 75 per year over the period.

The hottest day of the period reached 40.3 °C (on 3 July 1966) and the coldest -24.0 °C (on 22 January 1984).

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

EdisonNew Jersey

coords: 40.52°, -74.41°
period: 1940–2025 · 86 yrs

DfaHot-summer humid continentalWarmest monthJulyColdest monthJanuaryWettest monthJulyDriest monthFebruary

Mean daily temperature

12.1°C

Average daily high

16.8°C

Average daily low

7.8°C

Annual rainfall

1,136mm

Sunshine / day

8.7h

Mean relative humidity

67%

Average peak wind

16.3km/h

Seasonal range

24.8°C

Frost days (< 0 °C)

84 d/yr

Hot days (≥ 30 °C)

35 d/yr

Rainy days (≥ 1 mm)

119 d/yr

Annual snowfall

61.6 cm

Average feels-like high

15.3 °C

Average feels-like low

5.4 °C

Average peak gust

38.2 km/h

Tropical nights (≥ 20 °C)

40 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 = 0.43 · 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

40.3 °C

3 July 1966

Coldest day

-24.0 °C

22 January 1984

Wettest day

153 mm

16 September 1999

Windiest day

54.9 km/h

29 October 2012

Strongest gust

140.0 km/h

25 November 1950

Hottest feels-like

44.8 °C

26 August 1948

Coldest feels-like

-29.4 °C

22 January 1984

Snowiest day

34.2 cm

23 January 2016

Sunniest day

14.1 h

19 June 2022

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.1 °C24 June 2025	-14.4 °C22 January 2025	12.8 °C	1,006 mm	42	88
2024	36.6 °C16 July 2024	-14.9 °C23 December 2024	13.6 °C	1,115 mm	43	59
2023	35.4 °C7 September 2023	-14.3 °C4 February 2023	13.7 °C	1,257 mm	31	53
2022	36.9 °C9 August 2022	-15.6 °C31 January 2022	13.2 °C	1,114 mm	57	90
2021	36.3 °C30 June 2021	-9.3 °C8 February 2021	13.5 °C	1,265 mm	42	70
2020	35.5 °C5 July 2020	-12.6 °C19 December 2020	13.6 °C	1,176 mm	48	55
2019	36.7 °C21 July 2019	-16.3 °C31 January 2019	13.0 °C	1,234 mm	48	90
2018	35.6 °C2 July 2018	-17.0 °C7 January 2018	12.9 °C	1,539 mm	44	80
2017	36.3 °C13 June 2017	-13.5 °C9 January 2017	13.3 °C	1,159 mm	37	68
2016	36.2 °C23 July 2016	-16.1 °C14 February 2016	13.5 °C	932 mm	63	72
2015	35.0 °C19 July 2015	-17.8 °C20 February 2015	12.9 °C	1,029 mm	50	85
2014	34.6 °C2 July 2014	-20.8 °C4 January 2014	11.6 °C	1,046 mm	30	91
2013	35.6 °C18 July 2013	-12.3 °C23 January 2013	12.3 °C	1,092 mm	31	90
2012	39.2 °C18 July 2012	-11.7 °C4 January 2012	13.8 °C	962 mm	50	60
2011	39.9 °C22 July 2011	-13.9 °C24 January 2011	13.3 °C	1,560 mm	42	82
2010	39.8 °C6 July 2010	-10.1 °C10 January 2010	13.5 °C	1,069 mm	71	84
2009	34.4 °C10 August 2009	-13.9 °C17 January 2009	12.1 °C	1,261 mm	25	82
2008	37.8 °C10 June 2008	-12.2 °C11 February 2008	12.7 °C	1,188 mm	37	86
2007	35.8 °C9 July 2007	-13.2 °C5 February 2007	12.7 °C	1,051 mm	44	85
2006	38.0 °C18 July 2006	-10.5 °C19 February 2006	13.5 °C	1,286 mm	43	65
2005	37.8 °C27 July 2005	-18.3 °C29 January 2005	12.6 °C	1,065 mm	52	85
2004	34.3 °C9 June 2004	-17.5 °C16 January 2004	12.1 °C	1,250 mm	27	86
2003	35.1 °C5 July 2003	-17.0 °C14 February 2003	11.5 °C	1,413 mm	26	94
2002	38.2 °C4 July 2002	-9.7 °C7 December 2002	13.1 °C	1,065 mm	55	71
2001	39.5 °C9 August 2001	-13.5 °C5 January 2001	12.9 °C	798 mm	36	81
2000	34.1 °C10 July 2000	-15.8 °C18 January 2000	11.7 °C	1,002 mm	18	91
1999	37.4 °C5 July 1999	-12.4 °C2 January 1999	12.8 °C	1,138 mm	47	72
1998	35.6 °C22 July 1998	-10.7 °C1 January 1998	13.5 °C	1,003 mm	40	52
1997	36.6 °C17 July 1997	-16.3 °C19 January 1997	12.0 °C	978 mm	41	73
1996	34.2 °C20 May 1996	-19.5 °C5 February 1996	11.5 °C	1,466 mm	11	82
1995	39.2 °C15 July 1995	-16.2 °C8 February 1995	12.4 °C	934 mm	45	87
1994	35.8 °C19 June 1994	-20.2 °C19 January 1994	12.3 °C	1,262 mm	37	83
1993	37.9 °C10 July 1993	-17.7 °C7 February 1993	12.3 °C	1,146 mm	46	82
1992	36.0 °C14 July 1992	-12.4 °C19 January 1992	11.5 °C	1,080 mm	22	85
1991	37.0 °C21 July 1991	-16.2 °C23 January 1991	13.2 °C	1,097 mm	56	79
1990	35.6 °C4 July 1990	-15.2 °C26 February 1990	13.2 °C	1,125 mm	31	60
1989	33.9 °C5 August 1989	-14.8 °C23 December 1989	11.6 °C	1,470 mm	25	99
1988	37.3 °C17 July 1988	-22.1 °C11 January 1988	11.7 °C	1,015 mm	54	92
1987	34.7 °C21 July 1987	-19.5 °C28 January 1987	12.0 °C	1,221 mm	40	83
1986	37.0 °C7 July 1986	-15.1 °C29 January 1986	12.1 °C	1,225 mm	29	86
1985	35.1 °C14 August 1985	-20.8 °C21 January 1985	12.2 °C	968 mm	24	88
1984	35.2 °C13 June 1984	-24.0 °C22 January 1984	11.9 °C	1,320 mm	29	79
1983	36.9 °C16 July 1983	-16.4 °C25 December 1983	12.4 °C	1,472 mm	56	72
1982	35.2 °C19 July 1982	-20.4 °C18 January 1982	11.5 °C	948 mm	18	87
1981	35.2 °C9 July 1981	-23.1 °C12 January 1981	11.6 °C	1,010 mm	31	89
1980	37.8 °C21 July 1980	-17.1 °C25 December 1980	11.7 °C	895 mm	51	98
1979	33.8 °C10 August 1979	-22.9 °C18 February 1979	11.8 °C	1,369 mm	20	75
1978	35.8 °C23 July 1978	-16.9 °C5 February 1978	10.7 °C	1,315 mm	27	99
1977	36.1 °C19 July 1977	-19.5 °C17 January 1977	11.7 °C	1,288 mm	33	93
1976	33.3 °C22 August 1976	-17.8 °C23 January 1976	11.5 °C	984 mm	33	102
1975	35.9 °C2 August 1975	-13.4 °C25 December 1975	12.4 °C	1,287 mm	27	77
1974	35.2 °C9 July 1974	-17.4 °C10 February 1974	12.2 °C	1,042 mm	32	86
1973	34.9 °C28 August 1973	-14.2 °C17 February 1973	12.6 °C	1,307 mm	30	65
1972	34.2 °C23 July 1972	-17.9 °C23 February 1972	11.4 °C	1,534 mm	25	92
1971	36.1 °C8 July 1971	-18.5 °C3 February 1971	12.1 °C	1,244 mm	32	78
1970	34.6 °C23 September 1970	-18.7 °C20 January 1970	11.8 °C	966 mm	44	99
1969	35.2 °C17 July 1969	-13.2 °C25 December 1969	11.6 °C	1,210 mm	26	104
1968	36.8 °C1 July 1968	-17.7 °C12 January 1968	11.7 °C	1,042 mm	41	89
1967	34.8 °C16 June 1967	-21.7 °C13 February 1967	10.9 °C	1,138 mm	18	95
1966	40.3 °C3 July 1966	-15.5 °C29 January 1966	11.5 °C	939 mm	45	88
1965	34.6 °C25 July 1965	-18.4 °C15 January 1965	11.3 °C	685 mm	42	94
1964	36.9 °C1 July 1964	-16.3 °C15 January 1964	11.7 °C	946 mm	40	93
1963	36.6 °C27 June 1963	-19.2 °C29 January 1963	11.2 °C	937 mm	24	96
1962	34.8 °C19 May 1962	-18.2 °C11 February 1962	10.9 °C	983 mm	29	99
1961	34.0 °C2 July 1961	-23.4 °C22 January 1961	11.4 °C	1,229 mm	37	90
1960	33.1 °C29 August 1960	-18.6 °C23 December 1960	11.2 °C	1,223 mm	20	106
1959	35.8 °C29 June 1959	-14.1 °C23 December 1959	12.5 °C	1,141 mm	52	86
1958	33.3 °C2 July 1958	-16.5 °C13 January 1958	10.8 °C	1,296 mm	28	85
1957	37.0 °C22 July 1957	-19.5 °C15 January 1957	12.3 °C	931 mm	36	78
1956	35.7 °C2 July 1956	-9.6 °C22 February 1956	11.5 °C	1,171 mm	23	82
1955	37.4 °C2 August 1955	-17.4 °C3 February 1955	12.1 °C	995 mm	44	98
1954	37.7 °C31 July 1954	-17.6 °C18 January 1954	12.0 °C	1,026 mm	30	82
1953	38.2 °C2 September 1953	-9.9 °C18 December 1953	12.9 °C	1,122 mm	42	65
1952	37.0 °C26 June 1952	-15.7 °C30 January 1952	12.3 °C	1,298 mm	36	74
1951	34.4 °C27 July 1951	-16.0 °C17 December 1951	12.1 °C	1,138 mm	29	80
1950	33.0 °C31 July 1950	-14.1 °C28 December 1950	11.5 °C	1,077 mm	23	93
1949	36.7 °C10 August 1949	-15.5 °C20 March 1949	13.0 °C	923 mm	45	75
1948	36.5 °C26 August 1948	-19.8 °C19 January 1948	11.2 °C	1,233 mm	24	91
1947	34.9 °C15 August 1947	-13.7 °C5 February 1947	11.6 °C	1,036 mm	21	102
1946	33.2 °C20 July 1946	-13.7 °C23 January 1946	12.3 °C	947 mm	14	72
1945	34.1 °C30 June 1945	-19.1 °C25 January 1945	11.5 °C	1,409 mm	21	86
1944	35.3 °C5 August 1944	-15.4 °C22 December 1944	11.5 °C	1,220 mm	41	103
1943	34.7 °C25 June 1943	-18.8 °C16 February 1943	11.1 °C	969 mm	36	108
1942	33.7 °C19 July 1942	-20.0 °C11 January 1942	11.4 °C	1,219 mm	17	94
1941	34.6 °C28 July 1941	-13.5 °C10 February 1941	11.6 °C	964 mm	29	100
1940	33.9 °C26 July 1940	-15.2 °C20 January 1940	10.5 °C	1,240 mm	11	101

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

17.5 °C

+0.7 °C

Hot days (≥ 30 °C)

42 d/yr

Frost days (< 0 °C)

88 d/yr

Annual rainfall

1006 mm

-130 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	2.5 °C	-0.9 °C	29 mm	-55 mm
Feb	5.4 °C	+0.4 °C	82 mm	+1 mm
Mar	14.2 °C	+4.3 °C	101 mm	-3 mm
Apr	17.9 °C	+1.7 °C	103 mm	+5 mm
May	21.5 °C	-0.3 °C	154 mm	+53 mm
Jun	27.7 °C	+0.9 °C	70 mm	-23 mm
Jul	31.2 °C	+1.8 °C	164 mm	+55 mm
Aug	27.6 °C	-0.6 °C	33 mm	-72 mm
Sep	25.9 °C	+1.6 °C	78 mm	-14 mm
Oct	19.1 °C	+0.8 °C	70 mm	-16 mm
Nov	11.9 °C	0.0 °C	52 mm	-38 mm
Dec	3.9 °C	-1.9 °C	72 mm	-23 mm

The year's extremes

Hottest day

38.1 °C

24 Jun 2025

Coldest day

-14.4 °C

22 Jan 2025

Wettest day

44.5 mm

31 Jul 2025

Windiest day

33.8 km/h

17 Feb 2025

Strongest gust

81.7 km/h

5 Mar 2025

Hottest feels-like

42.8 °C

23 Jun 2025

Coldest feels-like

-19.4 °C

22 Jan 2025

Snowiest day

8.0 cm

14 Dec 2025

Sunniest day

14.1 h

3 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 Edison?

Edison has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 12.1 °C and it receives 1,136 mm of precipitation per year.

What is the hottest day ever recorded in Edison?

The hottest day measured in Edison between 1940 and 2025 was 3 July 1966, reaching 40.3 °C.

What is the coldest day in Edison?

The coldest day measured in Edison between 1940 and 2025 was 22 January 1984, at -24.0 °C.

Does it snow in Edison?

Yes. Edison gets on average 61.6 cm of snow per year and has around 84 frost days.

Has the climate of Edison warmed?

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

What is the wettest day in Edison?

The wettest day measured in Edison between 1940 and 2025 was 16 September 1999, with 153 mm of rain in 24 hours.

What was the windiest day in Edison?

The windiest day measured in Edison between 1940 and 2025 was 29 October 2012, with winds reaching 54.9 km/h.

What is the warmest month in Edison?

The warmest month in Edison is July (24.4 °C on average); the coldest is January (-0.4 °C).

How much does it rain in Edison?

Edison receives on average 1,136 mm of precipitation per year, spread over about 119 rainy days.

Is it sunny in Edison?

Edison gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.

What is the biggest single-day snowfall in Edison?

The heaviest 24-hour snowfall measured in Edison between 1940 and 2025 was 23 January 2016, with 34.2 cm.

Are there tropical nights in Edison?

Yes: Edison has on average 40 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Edison?

In Edison, between 1940 and 2025, the highest apparent temperature reached 44.8 °C on 26 August 1948, and the lowest was -29.4 °C on 22 January 1984.

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