Princeton climate — normals and trends

Q: What is the climate of Princeton?

Princeton has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.2 °C and it receives 1,107 mm of precipitation per year.

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

The hottest day measured in Princeton between 1940 and 2025 was 5 June 1945, reaching 36.7 °C.

Q: What is the coldest day in Princeton?

The coldest day measured in Princeton between 1940 and 2025 was 20 January 1977, at -2.4 °C.

Q: Does it snow in Princeton?

Almost never: Princeton sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Princeton warmed?

Yes: Princeton warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Princeton?

The wettest day measured in Princeton between 1940 and 2025 was 10 September 2017, with 122 mm of rain in 24 hours.

Q: What was the windiest day in Princeton?

The windiest day measured in Princeton between 1940 and 2025 was 24 October 2005, with winds reaching 114.2 km/h.

Q: What is the warmest month in Princeton?

The warmest month in Princeton is August (27.8 °C on average); the coldest is January (19.6 °C).

Q: How much does it rain in Princeton?

Princeton receives on average 1,107 mm of precipitation per year, spread over about 173 rainy days.

Q: Is it sunny in Princeton?

Princeton gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.

Princeton (United States) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.2 °C and it receives 1,107 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 August (27.8 °C on average) and the coldest is January (19.6 °C). Rainfall peaks in June.

Princeton averages 0 frost days, 124 hot days (≥ 30 °C) and 173 rainy days per year.

Princeton has warmed by +1.3 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.

The hottest day of the period reached 36.7 °C (on 5 June 1945) and the coldest -2.4 °C (on 20 January 1977).

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

PrincetonFlorida

coords: 25.54°, -80.41°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAugustColdest monthJanuaryWettest monthJuneDriest monthJanuary

Mean daily temperature

24.2°C

Average daily high

28.1°C

Average daily low

20.9°C

Annual rainfall

1,107mm

Sunshine / day

10.7h

Mean relative humidity

77%

Average peak wind

18.1km/h

Seasonal range

8.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

124 d/yr

Rainy days (≥ 1 mm)

173 d/yr

Annual snowfall

0.0 cm

Average feels-like high

30.9 °C

Average feels-like low

22.8 °C

Average peak gust

35.4 km/h

Tropical nights (≥ 20 °C)

246 d/yr

Solar radiation

18.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.3 °C

since 1940

+0.2 °C per decade · r² = 0.42 · 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

36.7 °C

5 June 1945

Coldest day

-2.4 °C

20 January 1977

Wettest day

122 mm

10 September 2017

Windiest day

114.2 km/h

24 October 2005

Strongest gust

197.3 km/h

24 October 2005

Hottest feels-like

43.5 °C

21 August 2010

Coldest feels-like

-7.7 °C

24 December 1989

Sunniest day

13.0 h

16 June 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	33.9 °C5 August 2025	7.0 °C31 December 2025	25.1 °C	1,293 mm	155	0
2024	36.5 °C15 May 2024	9.1 °C1 January 2024	25.3 °C	1,458 mm	148	0
2023	35.0 °C23 July 2023	4.6 °C15 January 2023	25.5 °C	1,439 mm	173	0
2022	34.2 °C18 August 2022	3.7 °C30 January 2022	25.3 °C	1,312 mm	151	0
2021	33.9 °C7 May 2021	6.0 °C4 February 2021	25.1 °C	1,101 mm	152	0
2020	34.0 °C10 July 2020	3.4 °C22 January 2020	25.5 °C	1,517 mm	167	0
2019	34.6 °C26 June 2019	7.2 °C21 January 2019	25.4 °C	1,266 mm	170	0
2018	34.2 °C21 July 2018	5.9 °C18 January 2018	24.9 °C	1,375 mm	147	0
2017	33.9 °C15 May 2017	7.1 °C14 December 2017	25.2 °C	1,185 mm	149	0
2016	35.2 °C18 June 2016	7.2 °C24 January 2016	24.9 °C	1,266 mm	146	0
2015	34.6 °C12 August 2015	3.6 °C20 February 2015	25.6 °C	856 mm	162	0
2014	34.2 °C28 July 2014	5.2 °C19 January 2014	24.6 °C	1,072 mm	139	0
2013	32.6 °C25 July 2013	6.3 °C4 March 2013	24.8 °C	1,159 mm	106	0
2012	34.0 °C14 June 2012	4.2 °C4 January 2012	24.5 °C	1,121 mm	116	0
2011	34.5 °C14 June 2011	5.3 °C23 January 2011	25.0 °C	949 mm	162	0
2010	35.7 °C7 June 2010	-0.4 °C11 January 2010	23.5 °C	1,082 mm	142	1
2009	35.5 °C22 June 2009	2.4 °C5 February 2009	24.6 °C	1,001 mm	151	0
2008	33.9 °C20 May 2008	2.2 °C3 January 2008	24.6 °C	1,044 mm	132	0
2007	34.0 °C5 June 2007	4.2 °C19 February 2007	24.8 °C	1,099 mm	127	0
2006	33.5 °C16 June 2006	4.2 °C14 February 2006	24.5 °C	939 mm	145	0
2005	33.9 °C23 July 2005	5.4 °C24 January 2005	24.3 °C	1,103 mm	130	0
2004	33.2 °C7 July 2004	6.2 °C15 December 2004	24.3 °C	788 mm	125	0
2003	32.4 °C23 July 2003	2.4 °C24 January 2003	24.4 °C	1,052 mm	144	0
2002	32.8 °C1 August 2002	5.2 °C4 January 2002	24.5 °C	885 mm	129	0
2001	32.7 °C11 June 2001	1.4 °C5 January 2001	23.9 °C	1,034 mm	102	0
2000	32.5 °C16 July 2000	4.0 °C27 January 2000	23.9 °C	917 mm	122	0
1999	34.1 °C12 April 1999	5.0 °C6 January 1999	24.1 °C	1,113 mm	114	0
1998	34.4 °C7 June 1998	7.1 °C17 December 1998	24.7 °C	907 mm	148	0
1997	33.2 °C22 May 1997	0.8 °C19 January 1997	24.3 °C	1,338 mm	102	0
1996	32.9 °C4 September 1996	1.8 °C5 February 1996	23.8 °C	1,130 mm	106	0
1995	34.7 °C16 May 1995	3.2 °C9 February 1995	24.2 °C	1,288 mm	122	0
1994	32.7 °C10 June 1994	7.9 °C15 January 1994	24.5 °C	1,369 mm	114	0
1993	34.3 °C16 August 1993	5.8 °C15 March 1993	24.2 °C	1,064 mm	131	0
1992	34.9 °C3 July 1992	6.1 °C17 January 1992	24.0 °C	1,004 mm	126	0
1991	33.4 °C16 August 1991	6.6 °C17 February 1991	24.7 °C	1,129 mm	137	0
1990	34.4 °C29 July 1990	9.1 °C11 December 1990	24.9 °C	881 mm	154	0
1989	33.2 °C26 May 1989	-2.4 °C25 December 1989	24.3 °C	936 mm	153	2
1988	33.3 °C2 July 1988	5.2 °C18 December 1988	24.1 °C	1,042 mm	130	0
1987	34.4 °C9 August 1987	4.1 °C28 January 1987	24.0 °C	1,136 mm	132	0
1986	34.8 °C31 July 1986	3.0 °C28 January 1986	24.2 °C	989 mm	132	0
1985	35.5 °C3 June 1985	-1.4 °C22 January 1985	23.9 °C	1,058 mm	133	1
1984	32.6 °C15 August 1984	4.8 °C1 March 1984	23.4 °C	1,024 mm	84	0
1983	33.4 °C26 July 1983	-1.0 °C26 December 1983	23.6 °C	1,396 mm	107	1
1982	32.6 °C2 July 1982	1.2 °C12 January 1982	24.5 °C	1,176 mm	117	0
1981	34.7 °C17 June 1981	-0.9 °C13 January 1981	23.3 °C	866 mm	131	1
1980	34.4 °C14 July 1980	2.4 °C3 March 1980	23.8 °C	972 mm	129	0
1979	33.5 °C18 June 1979	3.1 °C2 February 1979	23.7 °C	1,142 mm	113	0
1978	32.3 °C11 June 1978	0.1 °C23 February 1978	23.6 °C	1,378 mm	116	0
1977	32.2 °C13 July 1977	-2.4 °C20 January 1977	23.3 °C	1,237 mm	99	1
1976	33.8 °C15 July 1976	4.3 °C18 January 1976	23.4 °C	1,280 mm	70	0
1975	32.9 °C6 May 1975	4.8 °C23 December 1975	24.4 °C	1,045 mm	137	0
1974	33.1 °C12 May 1974	4.8 °C11 February 1974	24.4 °C	844 mm	127	0
1973	33.9 °C28 May 1973	3.5 °C11 February 1973	23.9 °C	1,146 mm	109	0
1972	33.0 °C2 July 1972	5.9 °C28 December 1972	24.3 °C	1,152 mm	126	0
1971	33.3 °C29 May 1971	1.6 °C20 January 1971	24.0 °C	1,010 mm	130	0
1970	34.4 °C5 August 1970	0.8 °C10 January 1970	23.4 °C	970 mm	96	0
1969	33.4 °C13 July 1969	5.4 °C19 February 1969	23.2 °C	1,409 mm	102	0
1968	32.5 °C20 August 1968	1.3 °C16 December 1968	22.9 °C	1,479 mm	93	0
1967	32.9 °C8 September 1967	2.6 °C26 February 1967	23.7 °C	1,003 mm	107	0
1966	32.8 °C31 August 1966	1.4 °C31 January 1966	23.2 °C	1,239 mm	97	0
1965	34.1 °C13 May 1965	0.9 °C18 January 1965	23.9 °C	1,021 mm	135	0
1964	34.0 °C14 August 1964	1.8 °C15 January 1964	24.1 °C	1,130 mm	126	0
1963	34.8 °C12 August 1963	5.0 °C26 December 1963	23.6 °C	1,073 mm	136	0
1962	34.3 °C4 August 1962	1.2 °C14 December 1962	23.6 °C	1,081 mm	144	0
1961	33.9 °C6 August 1961	4.8 °C30 December 1961	24.1 °C	867 mm	141	0
1960	33.3 °C20 May 1960	2.3 °C22 January 1960	23.6 °C	1,294 mm	103	0
1959	33.0 °C22 April 1959	4.2 °C30 November 1959	24.3 °C	1,144 mm	123	0
1958	33.7 °C25 August 1958	2.2 °C5 February 1958	23.5 °C	1,138 mm	116	0
1957	33.0 °C10 June 1957	1.9 °C12 December 1957	24.2 °C	1,146 mm	106	0
1956	35.1 °C7 August 1956	4.8 °C6 January 1956	23.7 °C	677 mm	121	0
1955	33.8 °C10 August 1955	4.7 °C30 January 1955	23.7 °C	885 mm	110	0
1954	33.5 °C14 August 1954	3.5 °C21 December 1954	23.5 °C	1,263 mm	94	0
1953	33.9 °C27 May 1953	6.2 °C16 December 1953	24.1 °C	1,227 mm	117	0
1952	34.2 °C25 July 1952	5.0 °C17 December 1952	23.8 °C	1,091 mm	139	0
1951	33.3 °C7 August 1951	2.6 °C9 January 1951	23.6 °C	1,019 mm	134	0
1950	33.8 °C19 August 1950	3.5 °C26 November 1950	23.6 °C	992 mm	112	0
1949	34.0 °C26 May 1949	4.3 °C1 January 1949	24.3 °C	879 mm	121	0
1948	33.7 °C15 August 1948	1.7 °C15 January 1948	24.6 °C	1,226 mm	131	0
1947	33.2 °C6 May 1947	4.1 °C6 February 1947	24.0 °C	1,361 mm	64	0
1946	31.4 °C7 April 1946	9.0 °C25 January 1946	24.3 °C	1,186 mm	61	0
1945	36.7 °C5 June 1945	8.4 °C1 December 1945	24.2 °C	1,073 mm	101	0
1944	36.5 °C25 June 1944	9.0 °C15 December 1944	24.3 °C	814 mm	132	0
1943	33.0 °C14 April 1943	6.6 °C20 December 1943	24.0 °C	1,009 mm	110	0
1942	33.9 °C22 July 1942	7.6 °C3 February 1942	24.1 °C	815 mm	108	0
1941	32.4 °C5 June 1941	6.5 °C10 February 1941	23.7 °C	1,191 mm	69	0
1940	32.0 °C30 June 1940	2.4 °C28 January 1940	23.4 °C	1,106 mm	64	0

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

28.9 °C

+0.8 °C

Hot days (≥ 30 °C)

155 d/yr

+31

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1293 mm

+186 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	23.3 °C	-0.8 °C	17 mm	-16 mm
Feb	26.7 °C	+1.9 °C	27 mm	-12 mm
Mar	27.0 °C	+0.6 °C	26 mm	-18 mm
Apr	28.6 °C	+0.5 °C	15 mm	-32 mm
May	31.3 °C	+1.6 °C	72 mm	-24 mm
Jun	31.1 °C	+0.6 °C	254 mm	+76 mm
Jul	31.7 °C	+0.6 °C	185 mm	+35 mm
Aug	32.2 °C	+0.9 °C	251 mm	+84 mm
Sep	31.4 °C	+0.9 °C	254 mm	+81 mm
Oct	29.9 °C	+1.0 °C	126 mm	+24 mm
Nov	27.2 °C	+0.6 °C	21 mm	-20 mm
Dec	26.1 °C	+1.2 °C	44 mm	+10 mm

The year's extremes

Hottest day

33.9 °C

5 Aug 2025

Coldest day

7.0 °C

31 Dec 2025

Wettest day

94.6 mm

3 Jun 2025

Windiest day

33.3 km/h

10 Mar 2025

Strongest gust

60.8 km/h

10 Mar 2025

Hottest feels-like

41.8 °C

18 Aug 2025

Coldest feels-like

3.3 °C

25 Jan 2025

Sunniest day

13.0 h

16 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 Princeton?

Princeton has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.2 °C and it receives 1,107 mm of precipitation per year.

What is the hottest day ever recorded in Princeton?

The hottest day measured in Princeton between 1940 and 2025 was 5 June 1945, reaching 36.7 °C.

What is the coldest day in Princeton?

The coldest day measured in Princeton between 1940 and 2025 was 20 January 1977, at -2.4 °C.

Does it snow in Princeton?

Almost never: Princeton sees virtually no snow, with about 0 frost days per year.

Has the climate of Princeton warmed?

Yes: Princeton warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Princeton?

The wettest day measured in Princeton between 1940 and 2025 was 10 September 2017, with 122 mm of rain in 24 hours.

What was the windiest day in Princeton?

The windiest day measured in Princeton between 1940 and 2025 was 24 October 2005, with winds reaching 114.2 km/h.

What is the warmest month in Princeton?

The warmest month in Princeton is August (27.8 °C on average); the coldest is January (19.6 °C).

How much does it rain in Princeton?

Princeton receives on average 1,107 mm of precipitation per year, spread over about 173 rainy days.

Is it sunny in Princeton?

Princeton gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.

Are there tropical nights in Princeton?

Yes: Princeton has on average 246 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Princeton?

In Princeton, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 21 August 2010, and the lowest was -7.7 °C on 24 December 1989.

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