Puerto Rico climate — normals and trends

Q: What is the climate of Puerto Rico?

Puerto Rico has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.8 °C and it receives 1,816 mm of precipitation per year.

Q: What is the hottest day ever recorded in Puerto Rico?

The hottest day measured in Puerto Rico between 1940 and 2025 was 16 November 1985, reaching 41.1 °C.

Q: What is the coldest day in Puerto Rico?

The coldest day measured in Puerto Rico between 1940 and 2025 was 18 July 1975, at -2.9 °C.

Q: Does it snow in Puerto Rico?

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

Q: Has the climate of Puerto Rico warmed?

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

Q: What is the wettest day in Puerto Rico?

The wettest day measured in Puerto Rico between 1940 and 2025 was 23 March 2010, with 160 mm of rain in 24 hours.

Q: What was the windiest day in Puerto Rico?

The windiest day measured in Puerto Rico between 1940 and 2025 was 23 November 1951, with winds reaching 35.7 km/h.

Q: What is the warmest month in Puerto Rico?

The warmest month in Puerto Rico is January (25.5 °C on average); the coldest is July (15.7 °C).

Q: How much does it rain in Puerto Rico?

Puerto Rico receives on average 1,816 mm of precipitation per year, spread over about 140 rainy days.

Q: Is it sunny in Puerto Rico?

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

Puerto Rico (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.8 °C and it receives 1,816 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 January (25.5 °C on average) and the coldest is July (15.7 °C). Rainfall peaks in October.

Puerto Rico averages 0 frost days, 101 hot days (≥ 30 °C) and 140 rainy days per year.

Puerto Rico 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 41.1 °C (on 16 November 1985) and the coldest -2.9 °C (on 18 July 1975).

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

Puerto RicoMisiones

coords: -26.81°, -55.02°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthOctoberDriest monthAugust

Mean daily temperature

20.8°C

Average daily high

26.4°C

Average daily low

16.3°C

Annual rainfall

1,816mm

Sunshine / day

9.2h

Mean relative humidity

79%

Average peak wind

12.2km/h

Seasonal range

9.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

101 d/yr

Rainy days (≥ 1 mm)

140 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.0 °C

Average feels-like low

16.9 °C

Average peak gust

30.6 km/h

Tropical nights (≥ 20 °C)

97 d/yr

Solar radiation

16.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.1 °C

since 1940

+0.1 °C per decade · r² = 0.30 · 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

41.1 °C

16 November 1985

Coldest day

-2.9 °C

18 July 1975

Wettest day

160 mm

23 March 2010

Windiest day

35.7 km/h

23 November 1951

Strongest gust

105.1 km/h

23 November 1951

Hottest feels-like

45.5 °C

24 January 2022

Coldest feels-like

-6.1 °C

18 July 1975

Snowiest day

0.1 cm

20 August 1965

Sunniest day

13.6 h

6 January 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.9 °C3 March 2025	-0.7 °C24 June 2025	21.1 °C	1,775 mm	116	1
2024	38.7 °C12 February 2024	1.2 °C30 June 2024	22.0 °C	1,692 mm	154	0
2023	37.4 °C24 September 2023	4.1 °C15 July 2023	21.8 °C	2,131 mm	121	0
2022	40.4 °C23 January 2022	0.8 °C12 June 2022	20.8 °C	1,515 mm	122	0
2021	37.6 °C28 December 2021	-0.3 °C29 July 2021	21.3 °C	1,224 mm	136	1
2020	40.1 °C1 October 2020	0.2 °C21 August 2020	21.7 °C	1,135 mm	157	0
2019	38.6 °C13 October 2019	-0.6 °C6 July 2019	21.9 °C	1,433 mm	118	1
2018	37.3 °C11 December 2018	1.5 °C17 June 2018	21.3 °C	1,587 mm	118	0
2017	36.2 °C10 September 2017	-0.4 °C18 July 2017	21.8 °C	1,924 mm	123	1
2016	36.8 °C24 January 2016	1.1 °C11 June 2016	20.7 °C	1,705 mm	113	0
2015	38.4 °C20 October 2015	3.1 °C12 September 2015	21.7 °C	2,560 mm	108	0
2014	38.5 °C8 February 2014	2.3 °C14 August 2014	21.7 °C	2,299 mm	125	0
2013	36.8 °C1 February 2013	0.5 °C24 July 2013	20.6 °C	1,864 mm	104	0
2012	38.8 °C6 February 2012	-0.9 °C8 June 2012	22.0 °C	1,215 mm	156	1
2011	39.1 °C21 December 2011	-0.4 °C27 June 2011	21.1 °C	1,703 mm	118	1
2010	38.0 °C5 February 2010	1.3 °C14 July 2010	20.5 °C	2,056 mm	108	0
2009	37.9 °C2 November 2009	-1.4 °C25 July 2009	20.9 °C	1,618 mm	140	2
2008	38.6 °C21 December 2008	-0.4 °C17 June 2008	21.0 °C	1,180 mm	122	1
2007	36.3 °C3 December 2007	-0.1 °C30 May 2007	21.0 °C	1,910 mm	137	2
2006	38.0 °C10 January 2006	1.2 °C31 July 2006	21.6 °C	1,572 mm	130	0
2005	39.8 °C20 February 2005	1.3 °C20 July 2005	21.7 °C	1,687 mm	143	0
2004	38.5 °C2 March 2004	0.2 °C11 July 2004	21.1 °C	1,378 mm	149	0
2003	39.2 °C11 November 2003	-0.1 °C12 July 2003	21.1 °C	1,525 mm	117	1
2002	37.8 °C9 January 2002	0.7 °C2 September 2002	21.5 °C	2,006 mm	124	0
2001	36.3 °C20 December 2001	-1.4 °C28 July 2001	21.5 °C	2,115 mm	111	1
2000	36.9 °C9 December 2000	-1.8 °C14 July 2000	20.8 °C	1,889 mm	121	3
1999	38.7 °C30 November 1999	-1.1 °C15 August 1999	20.8 °C	1,583 mm	132	1
1998	36.0 °C21 January 1998	2.7 °C25 June 1998	20.7 °C	2,541 mm	88	0
1997	35.9 °C26 December 1997	2.1 °C30 June 1997	21.3 °C	2,102 mm	120	0
1996	37.0 °C11 January 1996	-0.3 °C29 June 1996	20.5 °C	2,469 mm	97	1
1995	38.4 °C17 December 1995	1.4 °C26 June 1995	21.2 °C	1,773 mm	125	0
1994	36.9 °C12 December 1994	-1.3 °C26 June 1994	21.3 °C	2,132 mm	115	1
1993	35.8 °C4 December 1993	-1.3 °C15 July 1993	20.6 °C	1,843 mm	123	2
1992	36.4 °C21 January 1992	0.5 °C23 July 1992	20.4 °C	2,028 mm	96	0
1991	38.4 °C21 January 1991	-1.7 °C3 August 1991	21.3 °C	1,612 mm	137	3
1990	38.3 °C15 November 1990	0.1 °C29 July 1990	20.4 °C	2,270 mm	99	0
1989	37.3 °C5 December 1989	-0.3 °C6 July 1989	20.1 °C	1,893 mm	93	1
1988	38.5 °C7 December 1988	-0.8 °C12 July 1988	20.6 °C	1,357 mm	124	2
1987	37.5 °C11 October 1987	0.3 °C24 June 1987	20.5 °C	2,426 mm	104	0
1986	37.9 °C28 January 1986	2.2 °C5 September 1986	21.3 °C	1,897 mm	107	0
1985	41.1 °C16 November 1985	1.1 °C10 June 1985	21.3 °C	1,668 mm	126	0
1984	37.6 °C18 February 1984	1.0 °C26 August 1984	21.0 °C	1,870 mm	110	0
1983	35.6 °C9 December 1983	2.7 °C9 September 1983	20.3 °C	2,568 mm	112	0
1982	36.5 °C16 January 1982	3.5 °C29 June 1982	21.1 °C	1,839 mm	102	0
1981	35.6 °C1 March 1981	-1.1 °C19 June 1981	20.9 °C	1,591 mm	120	1
1980	36.5 °C17 December 1980	-0.6 °C31 July 1980	20.7 °C	2,042 mm	98	3
1979	39.1 °C26 January 1979	1.6 °C15 June 1979	20.4 °C	1,888 mm	96	0
1978	37.5 °C24 February 1978	0.9 °C1 June 1978	21.2 °C	1,187 mm	144	0
1977	36.5 °C29 December 1977	2.0 °C26 June 1977	21.6 °C	1,563 mm	130	0
1976	35.2 °C14 December 1976	-1.1 °C28 June 1976	19.7 °C	1,305 mm	96	2
1975	36.6 °C14 February 1975	-2.9 °C18 July 1975	20.3 °C	1,801 mm	83	2
1974	35.7 °C18 November 1974	1.4 °C13 June 1974	20.1 °C	1,736 mm	97	0
1973	36.1 °C12 January 1973	2.7 °C28 June 1973	20.5 °C	2,309 mm	93	0
1972	36.4 °C26 October 1972	0.9 °C9 July 1972	20.7 °C	2,289 mm	84	0
1971	36.9 °C5 February 1971	-0.2 °C12 June 1971	20.1 °C	1,886 mm	98	2
1970	38.6 °C8 December 1970	1.2 °C2 July 1970	20.8 °C	1,693 mm	103	0
1969	36.2 °C21 December 1969	1.8 °C3 August 1969	20.5 °C	1,797 mm	107	0
1968	37.2 °C2 November 1968	2.2 °C17 May 1968	20.3 °C	1,408 mm	105	0
1967	35.9 °C21 December 1967	-1.3 °C14 June 1967	20.7 °C	1,989 mm	83	1
1966	35.4 °C15 March 1966	-0.1 °C15 August 1966	20.2 °C	1,902 mm	80	1
1965	36.0 °C22 January 1965	0.1 °C11 July 1965	20.0 °C	1,910 mm	81	0
1964	36.3 °C30 January 1964	1.9 °C29 June 1964	19.9 °C	1,275 mm	106	0
1963	37.9 °C3 January 1963	0.3 °C6 August 1963	21.1 °C	1,790 mm	119	0
1962	41.0 °C24 December 1962	0.0 °C30 May 1962	19.5 °C	1,142 mm	95	0
1961	35.7 °C16 January 1961	-0.5 °C16 June 1961	21.2 °C	1,488 mm	111	1
1960	36.2 °C24 December 1960	0.1 °C25 June 1960	20.1 °C	1,504 mm	104	0
1959	34.5 °C14 January 1959	3.8 °C10 June 1959	20.7 °C	2,090 mm	72	0
1958	36.7 °C5 January 1958	3.6 °C30 August 1958	20.7 °C	1,911 mm	76	0
1957	35.7 °C18 October 1957	1.7 °C22 July 1957	20.5 °C	1,692 mm	54	0
1956	32.7 °C5 February 1956	2.1 °C15 May 1956	19.5 °C	1,762 mm	35	0
1955	34.5 °C29 November 1955	0.4 °C31 July 1955	20.1 °C	2,021 mm	64	0
1954	34.5 °C1 December 1954	6.0 °C21 June 1954	20.5 °C	2,004 mm	57	0
1953	33.9 °C5 January 1953	4.1 °C6 July 1953	21.2 °C	2,045 mm	57	0
1952	37.1 °C11 December 1952	4.5 °C19 June 1952	20.6 °C	1,436 mm	65	0
1951	33.7 °C25 September 1951	4.5 °C9 July 1951	20.6 °C	2,072 mm	37	0
1950	32.3 °C10 November 1950	2.1 °C11 July 1950	20.2 °C	1,884 mm	34	0
1949	34.8 °C14 November 1949	2.2 °C14 May 1949	20.1 °C	1,964 mm	47	0
1948	33.2 °C25 September 1948	3.7 °C8 August 1948	20.4 °C	2,819 mm	18	0
1947	33.6 °C30 November 1947	3.2 °C10 July 1947	20.2 °C	2,117 mm	25	0
1946	32.2 °C16 November 1946	2.1 °C18 July 1946	20.2 °C	2,505 mm	28	0
1945	36.1 °C10 January 1945	1.8 °C24 June 1945	20.9 °C	1,660 mm	53	0
1944	35.0 °C6 February 1944	1.2 °C27 June 1944	22.0 °C	1,191 mm	102	0
1943	38.5 °C17 January 1943	2.2 °C29 August 1943	20.9 °C	931 mm	97	0
1942	40.7 °C26 November 1942	-0.6 °C19 June 1942	20.6 °C	1,395 mm	116	1
1941	33.4 °C21 February 1941	3.0 °C26 June 1941	20.7 °C	2,475 mm	53	0
1940	33.1 °C26 December 1940	4.3 °C27 August 1940	20.4 °C	2,166 mm	47	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

27.0 °C

+0.6 °C

Hot days (≥ 30 °C)

116 d/yr

+15

Frost days (< 0 °C)

1 d/yr

Annual rainfall

1775 mm

-41 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	33.5 °C	+2.5 °C	61 mm	-114 mm
Feb	34.3 °C	+3.9 °C	55 mm	-101 mm
Mar	32.0 °C	+2.6 °C	83 mm	-53 mm
Apr	25.6 °C	-0.8 °C	84 mm	-54 mm
May	24.4 °C	+1.6 °C	150 mm	-0 mm
Jun	18.3 °C	-2.6 °C	350 mm	+199 mm
Jul	21.9 °C	+0.8 °C	49 mm	-64 mm
Aug	22.7 °C	-0.5 °C	121 mm	+9 mm
Sep	25.7 °C	+0.7 °C	121 mm	-37 mm
Oct	26.3 °C	-0.7 °C	292 mm	+90 mm
Nov	29.2 °C	+0.2 °C	145 mm	-15 mm
Dec	29.8 °C	-0.9 °C	264 mm	+100 mm

The year's extremes

Hottest day

37.9 °C

3 Mar 2025

Coldest day

-0.7 °C

24 Jun 2025

Wettest day

88.1 mm

12 Oct 2025

Windiest day

26.5 km/h

22 Sep 2025

Strongest gust

76.0 km/h

19 Aug 2025

Hottest feels-like

42.7 °C

2 Mar 2025

Coldest feels-like

-3.8 °C

24 Jun 2025

Sunniest day

13.6 h

4 Jan 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 Puerto Rico?

Puerto Rico has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.8 °C and it receives 1,816 mm of precipitation per year.

What is the hottest day ever recorded in Puerto Rico?

The hottest day measured in Puerto Rico between 1940 and 2025 was 16 November 1985, reaching 41.1 °C.

What is the coldest day in Puerto Rico?

The coldest day measured in Puerto Rico between 1940 and 2025 was 18 July 1975, at -2.9 °C.

Does it snow in Puerto Rico?

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

Has the climate of Puerto Rico warmed?

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

What is the wettest day in Puerto Rico?

The wettest day measured in Puerto Rico between 1940 and 2025 was 23 March 2010, with 160 mm of rain in 24 hours.

What was the windiest day in Puerto Rico?

The windiest day measured in Puerto Rico between 1940 and 2025 was 23 November 1951, with winds reaching 35.7 km/h.

What is the warmest month in Puerto Rico?

The warmest month in Puerto Rico is January (25.5 °C on average); the coldest is July (15.7 °C).

How much does it rain in Puerto Rico?

Puerto Rico receives on average 1,816 mm of precipitation per year, spread over about 140 rainy days.

Is it sunny in Puerto Rico?

Puerto Rico 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 Puerto Rico?

The heaviest 24-hour snowfall measured in Puerto Rico between 1940 and 2025 was 20 August 1965, with 0.1 cm.

Are there tropical nights in Puerto Rico?

Yes: Puerto Rico has on average 97 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Puerto Rico?

In Puerto Rico, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 24 January 2022, and the lowest was -6.1 °C on 18 July 1975.

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