Rio Claro climate — normals and trends

Q: What is the climate of Rio Claro?

Rio Claro has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 1,570 mm of precipitation per year.

Q: What is the hottest day ever recorded in Rio Claro?

The hottest day measured in Rio Claro between 1940 and 2025 was 12 April 2010, reaching 33.7 °C.

Q: What is the coldest day in Rio Claro?

The coldest day measured in Rio Claro between 1940 and 2025 was 15 January 1949, at 18.9 °C.

Q: Does it snow in Rio Claro?

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

Q: Has the climate of Rio Claro warmed?

Yes: Rio Claro warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Rio Claro?

The wettest day measured in Rio Claro between 1940 and 2025 was 15 June 2015, with 79 mm of rain in 24 hours.

Q: What was the windiest day in Rio Claro?

The windiest day measured in Rio Claro between 1940 and 2025 was 31 January 1998, with winds reaching 25.4 km/h.

Q: What is the warmest month in Rio Claro?

The warmest month in Rio Claro is September (26.5 °C on average); the coldest is January (24.9 °C).

Q: How much does it rain in Rio Claro?

Rio Claro receives on average 1,570 mm of precipitation per year, spread over about 260 rainy days.

Q: Is it sunny in Rio Claro?

Rio Claro gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Rio Claro (Trinidad and Tobago) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 1,570 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 September (26.5 °C on average) and the coldest is January (24.9 °C). Rainfall peaks in July.

Rio Claro averages 0 frost days, 95 hot days (≥ 30 °C) and 260 rainy days per year.

Rio Claro has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.

The hottest day of the period reached 33.7 °C (on 12 April 2010) and the coldest 18.9 °C (on 15 January 1949).

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

Rio ClaroMayaro

coords: 10.31°, -61.18°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthSeptemberColdest monthJanuaryWettest monthJulyDriest monthFebruary

Mean daily temperature

25.8°C

Average daily high

29.1°C

Average daily low

23.6°C

Annual rainfall

1,570mm

Sunshine / day

10.9h

Mean relative humidity

84%

Average peak wind

14.2km/h

Seasonal range

1.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

95 d/yr

Rainy days (≥ 1 mm)

260 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.0 °C

Average feels-like low

27.2 °C

Average peak gust

36.1 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

19.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.76 · 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

33.7 °C

12 April 2010

Coldest day

18.9 °C

15 January 1949

Wettest day

79 mm

15 June 2015

Windiest day

25.4 km/h

31 January 1998

Strongest gust

60.5 km/h

13 March 1983

Hottest feels-like

41.6 °C

1 October 2024

Coldest feels-like

20.8 °C

7 February 1983

Sunniest day

12.1 h

16 July 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	31.8 °C10 August 2025	21.8 °C25 December 2025	26.6 °C	1,553 mm	132
2024	33.4 °C30 March 2024	22.3 °C28 February 2024	27.3 °C	1,486 mm	261
2023	33.1 °C19 September 2023	20.0 °C30 January 2023	26.9 °C	1,602 mm	210
2022	32.7 °C15 September 2022	20.8 °C28 January 2022	26.2 °C	2,096 mm	112
2021	32.0 °C22 September 2021	20.8 °C5 January 2021	26.2 °C	1,776 mm	111
2020	32.3 °C4 April 2020	21.2 °C6 January 2020	26.6 °C	1,352 mm	174
2019	31.8 °C24 May 2019	20.1 °C14 January 2019	26.6 °C	1,355 mm	186
2018	32.2 °C11 November 2018	21.1 °C4 February 2018	26.2 °C	1,478 mm	116
2017	33.4 °C17 September 2017	20.7 °C10 January 2017	26.5 °C	1,731 mm	173
2016	33.0 °C4 October 2016	21.9 °C14 January 2016	26.9 °C	1,361 mm	242
2015	32.9 °C26 August 2015	22.1 °C7 February 2015	26.7 °C	1,111 mm	216
2014	32.6 °C19 October 2014	21.5 °C13 December 2014	26.6 °C	1,187 mm	192
2013	32.3 °C22 September 2013	22.2 °C4 February 2013	26.6 °C	1,573 mm	201
2012	32.6 °C29 September 2012	21.9 °C9 March 2012	26.5 °C	1,818 mm	193
2011	33.3 °C27 September 2011	21.3 °C2 March 2011	26.7 °C	1,975 mm	201
2010	33.7 °C12 April 2010	22.1 °C26 January 2010	27.1 °C	1,764 mm	260
2009	32.4 °C10 September 2009	21.2 °C9 March 2009	26.6 °C	1,275 mm	185
2008	32.5 °C30 September 2008	20.3 °C2 February 2008	26.4 °C	1,456 mm	183
2007	32.6 °C26 May 2007	21.5 °C22 February 2007	26.3 °C	1,666 mm	154
2006	32.3 °C15 May 2006	21.4 °C19 February 2006	26.4 °C	1,361 mm	165
2005	32.7 °C21 April 2005	21.2 °C29 November 2005	26.7 °C	1,777 mm	212
2004	32.6 °C12 April 2004	21.9 °C28 January 2004	26.4 °C	1,659 mm	170
2003	32.7 °C30 April 2003	22.1 °C14 January 2003	26.4 °C	1,478 mm	171
2002	32.3 °C13 September 2002	21.8 °C10 January 2002	26.1 °C	1,507 mm	111
2001	32.2 °C14 May 2001	19.8 °C27 February 2001	26.0 °C	1,424 mm	133
2000	32.0 °C2 May 2000	21.3 °C7 March 2000	25.8 °C	1,543 mm	93
1999	32.4 °C17 September 1999	20.9 °C25 December 1999	26.0 °C	1,501 mm	138
1998	32.8 °C25 April 1998	21.6 °C11 March 1998	26.4 °C	1,704 mm	162
1997	32.7 °C18 October 1997	20.8 °C22 January 1997	25.9 °C	1,275 mm	91
1996	32.0 °C12 April 1996	21.2 °C25 January 1996	25.9 °C	1,468 mm	111
1995	32.2 °C17 May 1995	20.1 °C4 February 1995	26.2 °C	1,272 mm	159
1994	31.5 °C16 October 1994	20.6 °C13 March 1994	25.8 °C	1,221 mm	62
1993	31.7 °C8 June 1993	20.8 °C27 February 1993	26.1 °C	1,250 mm	115
1992	31.7 °C5 May 1992	20.8 °C17 December 1992	25.8 °C	1,232 mm	58
1991	31.7 °C22 June 1991	20.8 °C15 January 1991	25.8 °C	1,311 mm	63
1990	32.8 °C25 September 1990	20.9 °C23 December 1990	26.0 °C	1,325 mm	98
1989	31.9 °C15 September 1989	20.1 °C16 February 1989	25.7 °C	1,224 mm	87
1988	31.9 °C15 September 1988	20.9 °C18 January 1988	26.0 °C	1,445 mm	136
1987	31.9 °C27 March 1987	20.6 °C10 March 1987	26.2 °C	1,223 mm	139
1986	31.6 °C16 May 1986	20.9 °C5 February 1986	25.4 °C	1,314 mm	37
1985	31.9 °C12 August 1985	20.6 °C29 January 1985	25.4 °C	1,395 mm	36
1984	30.9 °C12 September 1984	21.1 °C2 January 1984	25.1 °C	1,392 mm	10
1983	31.6 °C23 March 1983	19.9 °C7 February 1983	25.8 °C	1,556 mm	57
1982	31.8 °C3 May 1982	20.6 °C24 January 1982	25.6 °C	1,550 mm	50
1981	31.5 °C10 March 1981	21.5 °C12 February 1981	26.0 °C	1,724 mm	97
1980	31.2 °C11 April 1980	20.7 °C23 February 1980	25.7 °C	1,411 mm	76
1979	32.2 °C21 May 1979	19.4 °C5 January 1979	25.8 °C	1,603 mm	126
1978	31.7 °C3 May 1978	20.5 °C17 January 1978	25.8 °C	1,592 mm	89
1977	32.4 °C19 May 1977	20.7 °C4 February 1977	25.7 °C	1,365 mm	67
1976	31.8 °C29 October 1976	20.3 °C29 March 1976	25.3 °C	1,382 mm	46
1975	30.8 °C9 April 1975	19.1 °C29 December 1975	25.3 °C	1,575 mm	31
1974	31.1 °C13 July 1974	20.0 °C19 January 1974	25.3 °C	1,403 mm	18
1973	31.9 °C1 April 1973	20.5 °C13 December 1973	25.6 °C	1,735 mm	66
1972	31.7 °C8 June 1972	20.7 °C11 March 1972	25.5 °C	1,626 mm	41
1971	32.0 °C15 April 1971	20.8 °C11 February 1971	25.3 °C	1,242 mm	38
1970	31.9 °C15 April 1970	21.2 °C27 February 1970	25.7 °C	1,452 mm	78
1969	32.4 °C9 May 1969	21.0 °C16 February 1969	26.1 °C	1,513 mm	109
1968	30.8 °C8 May 1968	21.0 °C2 January 1968	25.5 °C	1,476 mm	31
1967	31.0 °C6 September 1967	21.3 °C15 December 1967	25.4 °C	1,254 mm	31
1966	32.1 °C19 March 1966	21.3 °C13 February 1966	25.8 °C	1,478 mm	68
1965	31.2 °C22 April 1965	21.0 °C28 January 1965	25.4 °C	1,324 mm	36
1964	31.1 °C22 March 1964	19.6 °C16 December 1964	25.5 °C	1,601 mm	44
1963	31.3 °C25 August 1963	21.3 °C17 January 1963	25.6 °C	1,655 mm	64
1962	32.7 °C4 May 1962	21.3 °C12 March 1962	25.5 °C	1,743 mm	73
1961	31.4 °C25 May 1961	21.6 °C6 February 1961	25.5 °C	1,686 mm	55
1960	31.6 °C20 February 1960	21.2 °C6 February 1960	25.7 °C	1,676 mm	62
1959	32.0 °C20 April 1959	21.0 °C13 January 1959	25.5 °C	1,579 mm	83
1958	33.4 °C22 April 1958	21.6 °C31 January 1958	25.9 °C	1,551 mm	102
1957	31.5 °C22 October 1957	21.0 °C2 January 1957	25.5 °C	1,380 mm	47
1956	31.1 °C22 April 1956	20.7 °C15 February 1956	25.0 °C	1,845 mm	15
1955	30.5 °C22 February 1955	19.0 °C1 January 1955	25.1 °C	1,807 mm	14
1954	31.2 °C24 March 1954	21.0 °C20 December 1954	25.0 °C	2,107 mm	14
1953	31.4 °C19 March 1953	20.8 °C8 December 1953	25.5 °C	1,526 mm	44
1952	31.9 °C6 April 1952	21.3 °C2 February 1952	25.6 °C	1,322 mm	63
1951	30.5 °C19 September 1951	19.8 °C7 March 1951	25.2 °C	2,134 mm	6
1950	30.6 °C7 April 1950	19.5 °C8 January 1950	25.0 °C	1,907 mm	5
1949	30.4 °C20 April 1949	18.9 °C15 January 1949	24.9 °C	2,098 mm	8
1948	30.6 °C3 April 1948	20.0 °C20 January 1948	25.1 °C	2,339 mm	9
1947	31.4 °C1 May 1947	20.7 °C19 February 1947	25.4 °C	1,526 mm	39
1946	30.8 °C5 April 1946	21.1 °C10 January 1946	25.0 °C	2,029 mm	7
1945	31.0 °C26 March 1945	20.7 °C9 January 1945	25.2 °C	1,797 mm	33
1944	31.2 °C11 April 1944	20.2 °C24 February 1944	25.3 °C	1,982 mm	21
1943	30.1 °C4 October 1943	20.8 °C8 February 1943	24.8 °C	1,766 mm	1
1942	31.1 °C23 March 1942	20.9 °C18 November 1942	25.1 °C	2,347 mm	31
1941	31.5 °C9 October 1941	20.9 °C10 January 1941	25.5 °C	1,750 mm	59
1940	31.2 °C4 April 1940	20.8 °C4 March 1940	25.4 °C	1,641 mm	43

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

29.5 °C

+0.4 °C

Hot days (≥ 30 °C)

132 d/yr

+37

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1553 mm

-17 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.9 °C	+0.6 °C	84 mm	+28 mm
Feb	29.1 °C	+0.4 °C	31 mm	-10 mm
Mar	29.7 °C	+0.4 °C	38 mm	-4 mm
Apr	29.8 °C	0.0 °C	65 mm	0 mm
May	29.4 °C	-0.2 °C	138 mm	+22 mm
Jun	28.6 °C	-0.2 °C	212 mm	+4 mm
Jul	29.6 °C	+0.8 °C	152 mm	-57 mm
Aug	30.1 °C	+0.8 °C	195 mm	-6 mm
Sep	30.2 °C	+0.5 °C	122 mm	-33 mm
Oct	30.4 °C	+0.9 °C	134 mm	-40 mm
Nov	29.3 °C	+0.4 °C	190 mm	+2 mm
Dec	28.6 °C	+0.2 °C	192 mm	+77 mm

The year's extremes

Hottest day

31.8 °C

10 Aug 2025

Coldest day

21.8 °C

25 Dec 2025

Wettest day

35.0 mm

3 Dec 2025

Windiest day

21.7 km/h

20 Jan 2025

Strongest gust

50.4 km/h

21 Jan 2025

Hottest feels-like

39.0 °C

3 Oct 2025

Coldest feels-like

24.7 °C

14 Jan 2025

Sunniest day

12.1 h

16 Jul 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 Rio Claro?

Rio Claro has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 1,570 mm of precipitation per year.

What is the hottest day ever recorded in Rio Claro?

The hottest day measured in Rio Claro between 1940 and 2025 was 12 April 2010, reaching 33.7 °C.

What is the coldest day in Rio Claro?

The coldest day measured in Rio Claro between 1940 and 2025 was 15 January 1949, at 18.9 °C.

Does it snow in Rio Claro?

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

Has the climate of Rio Claro warmed?

Yes: Rio Claro warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Rio Claro?

The wettest day measured in Rio Claro between 1940 and 2025 was 15 June 2015, with 79 mm of rain in 24 hours.

What was the windiest day in Rio Claro?

The windiest day measured in Rio Claro between 1940 and 2025 was 31 January 1998, with winds reaching 25.4 km/h.

What is the warmest month in Rio Claro?

The warmest month in Rio Claro is September (26.5 °C on average); the coldest is January (24.9 °C).

How much does it rain in Rio Claro?

Rio Claro receives on average 1,570 mm of precipitation per year, spread over about 260 rainy days.

Is it sunny in Rio Claro?

Rio Claro gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Are there tropical nights in Rio Claro?

Yes: Rio Claro has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Rio Claro?

In Rio Claro, between 1940 and 2025, the highest apparent temperature reached 41.6 °C on 1 October 2024, and the lowest was 20.8 °C on 7 February 1983.

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