Nilópolis climate — normals and trends

Q: What is the climate of Nilópolis?

Nilópolis has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 22.8 °C and it receives 1,431 mm of precipitation per year.

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

The hottest day measured in Nilópolis between 1940 and 2025 was 18 November 2023, reaching 40.5 °C.

Q: What is the coldest day in Nilópolis?

The coldest day measured in Nilópolis between 1940 and 2025 was 18 July 2000, at 7.2 °C.

Q: Does it snow in Nilópolis?

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

Q: Has the climate of Nilópolis warmed?

Yes: Nilópolis warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Nilópolis?

The wettest day measured in Nilópolis between 1940 and 2025 was 11 March 1954, with 221 mm of rain in 24 hours.

Q: What was the windiest day in Nilópolis?

The windiest day measured in Nilópolis between 1940 and 2025 was 17 December 1989, with winds reaching 25.6 km/h.

Q: What is the warmest month in Nilópolis?

The warmest month in Nilópolis is February (26.0 °C on average); the coldest is July (19.4 °C).

Q: How much does it rain in Nilópolis?

Nilópolis receives on average 1,431 mm of precipitation per year, spread over about 167 rainy days.

Q: Is it sunny in Nilópolis?

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

Nilópolis (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 22.8 °C and it receives 1,431 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 February (26.0 °C on average) and the coldest is July (19.4 °C). Rainfall peaks in January.

Nilópolis averages 0 frost days, 108 hot days (≥ 30 °C) and 167 rainy days per year.

Nilópolis has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The hottest day of the period reached 40.5 °C (on 18 November 2023) and the coldest 7.2 °C (on 18 July 2000).

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

NilópolisRio de Janeiro

coords: -22.81°, -43.41°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthFebruaryColdest monthJulyWettest monthJanuaryDriest monthJuly

Mean daily temperature

22.8°C

Average daily high

27.6°C

Average daily low

19.2°C

Annual rainfall

1,431mm

Sunshine / day

9.2h

Mean relative humidity

80%

Average peak wind

10.8km/h

Seasonal range

6.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

108 d/yr

Rainy days (≥ 1 mm)

167 d/yr

Annual snowfall

0.0 cm

Average feels-like high

30.8 °C

Average feels-like low

21.4 °C

Average peak gust

30.8 km/h

Tropical nights (≥ 20 °C)

160 d/yr

Solar radiation

16.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.60 · 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

40.5 °C

18 November 2023

Coldest day

7.2 °C

18 July 2000

Wettest day

221 mm

11 March 1954

Windiest day

25.6 km/h

17 December 1989

Strongest gust

74.5 km/h

10 December 2025

Hottest feels-like

46.5 °C

14 November 2023

Coldest feels-like

5.6 °C

18 July 2000

Sunniest day

13.4 h

22 December 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.1 °C17 February 2025	10.7 °C1 August 2025	23.3 °C	759 mm	141
2024	37.7 °C2 October 2024	9.4 °C14 August 2024	23.9 °C	1,242 mm	173
2023	40.5 °C18 November 2023	10.8 °C4 July 2023	23.7 °C	1,265 mm	159
2022	36.5 °C27 January 2022	10.5 °C28 June 2022	22.7 °C	1,471 mm	114
2021	38.0 °C14 September 2021	8.6 °C21 July 2021	22.8 °C	1,331 mm	125
2020	39.1 °C2 October 2020	9.9 °C27 May 2020	23.1 °C	1,357 mm	110
2019	37.9 °C18 September 2019	10.4 °C12 July 2019	24.1 °C	1,142 mm	158
2018	37.0 °C18 January 2018	11.3 °C22 May 2018	23.7 °C	1,303 mm	134
2017	36.6 °C1 January 2017	11.3 °C7 August 2017	23.6 °C	1,123 mm	139
2016	37.8 °C27 December 2016	9.0 °C15 June 2016	23.6 °C	1,206 mm	157
2015	38.2 °C24 September 2015	13.2 °C27 June 2015	24.2 °C	1,198 mm	157
2014	37.7 °C3 January 2014	10.5 °C8 August 2014	24.0 °C	793 mm	173
2013	38.8 °C12 November 2013	10.9 °C29 August 2013	23.0 °C	1,614 mm	112
2012	39.3 °C19 September 2012	11.6 °C29 September 2012	23.4 °C	1,138 mm	143
2011	36.2 °C28 January 2011	9.6 °C4 September 2011	22.8 °C	1,222 mm	119
2010	38.0 °C8 February 2010	9.7 °C18 August 2010	23.4 °C	1,310 mm	146
2009	36.7 °C19 November 2009	8.5 °C4 June 2009	23.4 °C	1,734 mm	129
2008	35.5 °C4 September 2008	10.2 °C15 July 2008	22.6 °C	1,643 mm	104
2007	37.1 °C10 March 2007	10.3 °C31 July 2007	23.5 °C	1,216 mm	150
2006	37.9 °C25 January 2006	11.1 °C6 September 2006	23.4 °C	1,252 mm	135
2005	38.6 °C14 October 2005	12.7 °C9 July 2005	23.5 °C	1,590 mm	127
2004	36.4 °C31 October 2004	11.0 °C11 August 2004	22.9 °C	1,336 mm	91
2003	38.5 °C16 December 2003	11.2 °C19 August 2003	23.5 °C	1,493 mm	142
2002	37.8 °C1 December 2002	12.0 °C3 September 2002	24.2 °C	1,030 mm	168
2001	35.2 °C15 February 2001	12.4 °C30 July 2001	23.6 °C	1,100 mm	155
2000	35.8 °C15 January 2000	7.2 °C18 July 2000	22.8 °C	1,155 mm	115
1999	37.0 °C2 February 1999	11.0 °C13 July 1999	22.3 °C	1,337 mm	107
1998	37.1 °C31 January 1998	11.1 °C7 June 1998	23.2 °C	1,400 mm	128
1997	37.5 °C9 September 1997	10.5 °C3 June 1997	23.3 °C	1,266 mm	163
1996	36.9 °C27 January 1996	10.1 °C25 July 1996	22.7 °C	1,684 mm	115
1995	38.6 °C17 January 1995	11.4 °C6 September 1995	23.3 °C	1,646 mm	136
1994	37.9 °C17 February 1994	7.7 °C27 June 1994	23.6 °C	1,600 mm	146
1993	38.0 °C17 November 1993	10.5 °C13 August 1993	23.6 °C	1,187 mm	141
1992	37.0 °C22 February 1992	10.9 °C27 July 1992	23.4 °C	1,402 mm	140
1991	35.2 °C26 December 1991	11.4 °C5 August 1991	23.0 °C	1,380 mm	107
1990	36.8 °C25 January 1990	11.3 °C19 May 1990	23.4 °C	1,247 mm	140
1989	34.7 °C21 February 1989	9.6 °C20 July 1989	22.7 °C	1,408 mm	93
1988	35.8 °C19 January 1988	7.3 °C6 June 1988	22.8 °C	1,578 mm	93
1987	35.5 °C9 January 1987	10.6 °C26 June 1987	23.2 °C	1,403 mm	108
1986	35.8 °C7 October 1986	10.5 °C13 July 1986	23.3 °C	1,410 mm	115
1985	35.5 °C27 August 1985	10.1 °C19 July 1985	22.6 °C	1,563 mm	79
1984	36.4 °C13 January 1984	11.3 °C27 August 1984	23.4 °C	1,223 mm	107
1983	36.1 °C26 February 1983	9.5 °C7 August 1983	22.9 °C	1,882 mm	78
1982	35.1 °C4 November 1982	11.3 °C6 May 1982	22.8 °C	1,547 mm	68
1981	37.1 °C29 September 1981	9.8 °C22 July 1981	22.7 °C	1,479 mm	85
1980	36.2 °C27 October 1980	11.3 °C18 June 1980	23.1 °C	1,301 mm	108
1979	34.7 °C14 December 1979	7.5 °C1 June 1979	22.3 °C	1,736 mm	78
1978	36.2 °C31 January 1978	8.7 °C2 June 1978	22.7 °C	1,389 mm	91
1977	36.9 °C1 November 1977	13.3 °C21 May 1977	23.5 °C	1,168 mm	127
1976	35.9 °C19 January 1976	9.8 °C16 August 1976	22.5 °C	1,642 mm	89
1975	35.5 °C9 December 1975	7.9 °C8 July 1975	22.5 °C	1,553 mm	92
1974	36.3 °C26 November 1974	10.2 °C1 July 1974	22.7 °C	1,262 mm	94
1973	37.1 °C11 February 1973	11.5 °C22 June 1973	23.2 °C	1,549 mm	96
1972	35.7 °C27 October 1972	11.2 °C23 June 1972	23.0 °C	1,419 mm	109
1971	36.0 °C24 January 1971	11.3 °C20 July 1971	22.7 °C	1,219 mm	104
1970	35.4 °C10 December 1970	10.7 °C13 August 1970	22.6 °C	996 mm	87
1969	37.5 °C9 January 1969	11.5 °C7 June 1969	22.6 °C	1,186 mm	80
1968	37.9 °C24 December 1968	9.9 °C14 July 1968	21.6 °C	1,049 mm	72
1967	35.5 °C14 January 1967	11.4 °C10 June 1967	22.8 °C	1,656 mm	71
1966	35.3 °C3 December 1966	11.4 °C25 September 1966	22.2 °C	1,798 mm	90
1965	35.3 °C21 December 1965	9.6 °C13 July 1965	22.1 °C	2,038 mm	83
1964	35.1 °C18 February 1964	9.3 °C29 July 1964	21.4 °C	1,730 mm	67
1963	37.1 °C1 November 1963	10.7 °C8 August 1963	22.5 °C	1,102 mm	110
1962	33.8 °C18 February 1962	9.4 °C26 August 1962	21.3 °C	2,083 mm	56
1961	40.3 °C28 September 1961	12.1 °C19 June 1961	23.0 °C	1,690 mm	117
1960	36.9 °C24 September 1960	10.1 °C15 July 1960	21.8 °C	1,591 mm	70
1959	35.5 °C28 October 1959	11.6 °C13 June 1959	22.7 °C	1,310 mm	113
1958	36.4 °C16 November 1958	9.6 °C22 September 1958	22.4 °C	1,659 mm	99
1957	36.0 °C19 October 1957	10.6 °C23 July 1957	22.0 °C	1,375 mm	73
1956	38.1 °C27 January 1956	9.8 °C17 August 1956	21.6 °C	1,233 mm	93
1955	36.2 °C14 September 1955	11.0 °C14 July 1955	22.0 °C	1,000 mm	113
1954	36.8 °C22 September 1954	10.7 °C30 August 1954	22.4 °C	1,938 mm	79
1953	36.0 °C30 January 1953	11.1 °C27 July 1953	22.4 °C	1,494 mm	90
1952	35.2 °C1 October 1952	11.0 °C17 July 1952	22.0 °C	1,596 mm	63
1951	37.9 °C23 November 1951	10.7 °C14 August 1951	21.8 °C	1,301 mm	98
1950	35.3 °C18 September 1950	10.0 °C14 July 1950	21.9 °C	1,709 mm	78
1949	34.0 °C18 March 1949	11.1 °C3 July 1949	21.5 °C	1,730 mm	56
1948	36.4 °C27 September 1948	10.3 °C31 August 1948	22.1 °C	1,196 mm	92
1947	36.8 °C8 January 1947	8.4 °C4 August 1947	21.6 °C	1,813 mm	57
1946	34.8 °C19 October 1946	10.7 °C30 July 1946	22.6 °C	1,828 mm	105
1945	35.6 °C13 November 1945	11.6 °C12 July 1945	22.4 °C	1,728 mm	80
1944	35.2 °C7 September 1944	10.5 °C22 August 1944	22.1 °C	1,702 mm	74
1943	34.1 °C19 January 1943	9.6 °C5 September 1943	21.2 °C	1,461 mm	60
1942	37.2 °C27 November 1942	8.8 °C24 June 1942	21.5 °C	1,241 mm	89
1941	35.7 °C12 January 1941	11.4 °C12 July 1941	22.2 °C	1,891 mm	80
1940	35.1 °C13 September 1940	12.1 °C28 September 1940	22.4 °C	2,033 mm	69

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

28.5 °C

+0.9 °C

Hot days (≥ 30 °C)

141 d/yr

+33

Frost days (< 0 °C)

0 d/yr

Annual rainfall

759 mm

-672 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.9 °C	+0.5 °C	157 mm	-74 mm
Feb	34.1 °C	+3.4 °C	20 mm	-166 mm
Mar	31.0 °C	+1.5 °C	77 mm	-107 mm
Apr	27.7 °C	0.0 °C	124 mm	+24 mm
May	27.0 °C	+1.2 °C	22 mm	-38 mm
Jun	26.1 °C	+1.0 °C	25 mm	-13 mm
Jul	23.9 °C	-0.9 °C	21 mm	-14 mm
Aug	25.9 °C	0.0 °C	11 mm	-28 mm
Sep	27.3 °C	+0.6 °C	34 mm	-35 mm
Oct	27.8 °C	+0.4 °C	94 mm	-18 mm
Nov	28.2 °C	+0.5 °C	79 mm	-90 mm
Dec	32.1 °C	+3.1 °C	95 mm	-114 mm

The year's extremes

Hottest day

38.1 °C

17 Feb 2025

Coldest day

10.7 °C

1 Aug 2025

Wettest day

40.6 mm

5 Apr 2025

Windiest day

24.7 km/h

10 Dec 2025

Strongest gust

74.5 km/h

10 Dec 2025

Hottest feels-like

43.4 °C

19 Jan 2025

Coldest feels-like

9.9 °C

2 Aug 2025

Sunniest day

13.4 h

22 Dec 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 Nilópolis?

Nilópolis has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 22.8 °C and it receives 1,431 mm of precipitation per year.

What is the hottest day ever recorded in Nilópolis?

The hottest day measured in Nilópolis between 1940 and 2025 was 18 November 2023, reaching 40.5 °C.

What is the coldest day in Nilópolis?

The coldest day measured in Nilópolis between 1940 and 2025 was 18 July 2000, at 7.2 °C.

Does it snow in Nilópolis?

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

Has the climate of Nilópolis warmed?

Yes: Nilópolis warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Nilópolis?

The wettest day measured in Nilópolis between 1940 and 2025 was 11 March 1954, with 221 mm of rain in 24 hours.

What was the windiest day in Nilópolis?

The windiest day measured in Nilópolis between 1940 and 2025 was 17 December 1989, with winds reaching 25.6 km/h.

What is the warmest month in Nilópolis?

The warmest month in Nilópolis is February (26.0 °C on average); the coldest is July (19.4 °C).

How much does it rain in Nilópolis?

Nilópolis receives on average 1,431 mm of precipitation per year, spread over about 167 rainy days.

Is it sunny in Nilópolis?

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

Are there tropical nights in Nilópolis?

Yes: Nilópolis has on average 160 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Nilópolis?

In Nilópolis, between 1940 and 2025, the highest apparent temperature reached 46.5 °C on 14 November 2023, and the lowest was 5.6 °C on 18 July 2000.

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