Serasa climate — normals and trends

Q: What is the climate of Serasa?

Serasa has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 2,235 mm of precipitation per year.

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

The hottest day measured in Serasa between 1940 and 2025 was 2 June 1998, reaching 36.1 °C.

Q: What is the coldest day in Serasa?

The coldest day measured in Serasa between 1940 and 2025 was 21 February 1965, at 20.3 °C.

Q: Does it snow in Serasa?

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

Q: Has the climate of Serasa warmed?

Yes: Serasa warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Serasa?

The wettest day measured in Serasa between 1940 and 2025 was 5 June 1991, with 290 mm of rain in 24 hours.

Q: What was the windiest day in Serasa?

The windiest day measured in Serasa between 1940 and 2025 was 22 December 2024, with winds reaching 44.9 km/h.

Q: What is the warmest month in Serasa?

The warmest month in Serasa is May (27.5 °C on average); the coldest is January (26.2 °C).

Q: How much does it rain in Serasa?

Serasa receives on average 2,235 mm of precipitation per year, spread over about 272 rainy days.

Q: Is it sunny in Serasa?

Serasa gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Serasa (Brunei) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.8 °C and it receives 2,235 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 May (27.5 °C on average) and the coldest is January (26.2 °C). Rainfall peaks in October.

Serasa averages 0 frost days, 200 hot days (≥ 30 °C) and 272 rainy days per year.

Serasa has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.

The hottest day of the period reached 36.1 °C (on 2 June 1998) and the coldest 20.3 °C (on 21 February 1965).

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

SerasaBrunei-Muara District

coords: 5.02°, 115.06°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthMayColdest monthJanuaryWettest monthOctoberDriest monthFebruary

Mean daily temperature

26.8°C

Average daily high

30.1°C

Average daily low

24.4°C

Annual rainfall

2,235mm

Sunshine / day

10.1h

Mean relative humidity

84%

Average peak wind

13.8km/h

Seasonal range

1.3°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

200 d/yr

Rainy days (≥ 1 mm)

272 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.4 °C

Average feels-like low

28.8 °C

Average peak gust

27.6 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

19.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °C

since 1940

+0.2 °C per decade · r² = 0.79 · 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

36.1 °C

2 June 1998

Coldest day

20.3 °C

21 February 1965

Wettest day

290 mm

5 June 1991

Windiest day

44.9 km/h

22 December 2024

Strongest gust

66.2 km/h

22 November 1983

Hottest feels-like

43.3 °C

12 May 2024

Coldest feels-like

21.9 °C

21 January 1950

Sunniest day

12.3 h

5 July 1957

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.2 °C13 June 2025	23.4 °C5 October 2025	27.7 °C	2,861 mm	294
2024	34.8 °C30 March 2024	23.7 °C31 August 2024	28.2 °C	2,493 mm	338
2023	33.8 °C31 May 2023	23.0 °C14 March 2023	27.9 °C	2,490 mm	316
2022	33.6 °C3 July 2022	22.9 °C27 December 2022	27.4 °C	2,836 mm	275
2021	34.2 °C13 May 2021	23.1 °C18 January 2021	27.5 °C	2,390 mm	278
2020	35.9 °C31 May 2020	23.5 °C28 June 2020	27.9 °C	2,107 mm	322
2019	35.4 °C25 September 2019	23.6 °C28 February 2019	28.1 °C	1,976 mm	325
2018	33.7 °C18 July 2018	23.6 °C8 February 2018	27.6 °C	2,201 mm	308
2017	33.5 °C29 July 2017	22.8 °C8 February 2017	27.5 °C	2,631 mm	301
2016	34.2 °C27 May 2016	23.9 °C3 August 2016	28.1 °C	2,209 mm	326
2015	34.5 °C20 May 2015	23.1 °C13 February 2015	27.7 °C	1,999 mm	288
2014	35.4 °C7 May 2014	22.1 °C29 January 2014	27.3 °C	2,350 mm	259
2013	33.8 °C19 June 2013	23.3 °C8 October 2013	27.4 °C	2,075 mm	274
2012	34.0 °C20 June 2012	23.6 °C2 February 2012	27.3 °C	2,231 mm	286
2011	33.0 °C2 August 2011	23.3 °C1 February 2011	27.2 °C	2,586 mm	254
2010	34.4 °C12 April 2010	23.0 °C16 January 2010	27.6 °C	2,463 mm	301
2009	34.7 °C10 August 2009	22.5 °C6 February 2009	27.5 °C	2,047 mm	279
2008	32.6 °C4 May 2008	22.6 °C17 February 2008	26.9 °C	3,038 mm	260
2007	33.0 °C5 August 2007	23.0 °C2 February 2007	27.2 °C	2,884 mm	244
2006	33.8 °C27 March 2006	23.6 °C1 September 2006	27.5 °C	1,520 mm	322
2005	35.4 °C1 May 2005	23.0 °C20 January 2005	27.7 °C	1,684 mm	294
2004	34.1 °C21 April 2004	23.2 °C3 August 2004	27.5 °C	1,544 mm	263
2003	34.4 °C13 April 2003	23.2 °C26 December 2003	27.8 °C	1,562 mm	302
2002	34.8 °C19 August 2002	23.1 °C10 February 2002	27.9 °C	1,177 mm	313
2001	33.4 °C6 July 2001	23.2 °C13 January 2001	27.2 °C	2,031 mm	236
2000	34.0 °C19 May 2000	23.0 °C11 February 2000	27.1 °C	2,131 mm	243
1999	32.9 °C26 April 1999	23.4 °C7 January 1999	27.0 °C	2,485 mm	236
1998	36.1 °C2 June 1998	23.4 °C23 November 1998	28.0 °C	2,110 mm	301
1997	34.1 °C19 August 1997	21.6 °C2 January 1997	27.5 °C	1,493 mm	278
1996	33.4 °C2 August 1996	21.8 °C5 March 1996	26.9 °C	2,405 mm	210
1995	33.9 °C7 May 1995	23.4 °C10 September 1995	27.4 °C	1,981 mm	273
1994	32.8 °C30 July 1994	23.4 °C14 March 1994	27.2 °C	1,537 mm	233
1993	33.2 °C7 May 1993	20.9 °C30 January 1993	27.0 °C	1,856 mm	219
1992	34.6 °C27 April 1992	22.2 °C22 February 1992	27.1 °C	1,865 mm	212
1991	32.9 °C28 March 1991	22.3 °C13 March 1991	27.0 °C	2,221 mm	218
1990	33.8 °C17 September 1990	22.5 °C3 December 1990	27.2 °C	1,716 mm	238
1989	32.6 °C24 May 1989	22.2 °C10 December 1989	26.8 °C	1,973 mm	197
1988	32.8 °C19 April 1988	21.8 °C11 December 1988	27.0 °C	2,542 mm	232
1987	34.7 °C22 April 1987	23.0 °C15 January 1987	27.4 °C	1,658 mm	265
1986	33.7 °C26 May 1986	22.0 °C22 February 1986	26.7 °C	2,085 mm	178
1985	32.4 °C12 June 1985	22.0 °C13 January 1985	26.6 °C	2,172 mm	189
1984	31.9 °C9 June 1984	22.6 °C13 February 1984	26.4 °C	2,544 mm	143
1983	35.0 °C18 April 1983	22.8 °C4 December 1983	27.3 °C	2,022 mm	257
1982	33.1 °C28 June 1982	22.5 °C29 January 1982	26.8 °C	1,572 mm	238
1981	32.7 °C20 August 1981	22.2 °C23 January 1981	26.9 °C	2,481 mm	210
1980	32.6 °C25 May 1980	22.7 °C21 December 1980	26.8 °C	2,372 mm	215
1979	35.0 °C25 May 1979	22.5 °C13 December 1979	27.0 °C	2,193 mm	244
1978	33.5 °C4 April 1978	23.0 °C26 January 1978	26.9 °C	2,180 mm	209
1977	32.2 °C25 September 1977	22.3 °C26 January 1977	26.6 °C	2,466 mm	172
1976	32.2 °C25 July 1976	21.6 °C4 February 1976	26.3 °C	2,592 mm	149
1975	32.1 °C14 August 1975	22.4 °C1 February 1975	26.3 °C	2,726 mm	134
1974	32.0 °C31 May 1974	20.7 °C12 January 1974	26.1 °C	2,764 mm	127
1973	33.5 °C9 February 1973	22.6 °C6 December 1973	26.8 °C	2,853 mm	217
1972	31.7 °C6 June 1972	21.0 °C14 January 1972	26.4 °C	2,321 mm	171
1971	32.1 °C5 May 1971	22.1 °C1 February 1971	26.1 °C	2,503 mm	118
1970	32.1 °C16 June 1970	22.7 °C4 January 1970	26.4 °C	2,974 mm	136
1969	32.1 °C5 April 1969	22.6 °C19 January 1969	26.5 °C	2,866 mm	150
1968	31.9 °C28 July 1968	21.1 °C24 January 1968	26.2 °C	2,377 mm	129
1967	31.7 °C11 April 1967	21.3 °C5 February 1967	26.1 °C	2,308 mm	109
1966	31.1 °C24 July 1966	22.3 °C29 March 1966	26.0 °C	3,313 mm	68
1965	31.5 °C24 October 1965	20.3 °C21 February 1965	26.1 °C	1,998 mm	131
1964	32.3 °C2 April 1964	22.0 °C16 December 1964	26.4 °C	2,162 mm	175
1963	32.5 °C2 May 1963	21.7 °C20 January 1963	26.3 °C	2,563 mm	161
1962	32.5 °C2 August 1962	22.3 °C13 March 1962	26.3 °C	2,863 mm	127
1961	32.4 °C5 April 1961	21.4 °C19 January 1961	26.4 °C	1,984 mm	173
1960	32.3 °C10 June 1960	22.0 °C29 February 1960	26.4 °C	2,332 mm	154
1959	33.0 °C21 February 1959	21.6 °C19 January 1959	26.5 °C	1,919 mm	177
1958	33.8 °C30 March 1958	22.4 °C1 December 1958	26.9 °C	2,254 mm	229
1957	32.4 °C19 August 1957	21.9 °C1 February 1957	26.5 °C	2,083 mm	179
1956	31.6 °C5 June 1956	22.2 °C5 January 1956	25.9 °C	3,054 mm	105
1955	31.6 °C21 March 1955	21.0 °C5 March 1955	26.1 °C	2,810 mm	133
1954	31.9 °C9 June 1954	21.8 °C25 December 1954	26.1 °C	2,243 mm	66
1953	34.2 °C18 August 1953	21.5 °C25 January 1953	26.8 °C	1,338 mm	219
1952	33.7 °C11 June 1952	22.3 °C30 December 1952	27.0 °C	1,371 mm	208
1951	33.5 °C18 June 1951	22.0 °C8 February 1951	26.4 °C	1,629 mm	126
1950	31.4 °C10 June 1950	21.0 °C21 January 1950	26.0 °C	2,062 mm	70
1949	32.4 °C8 May 1949	21.8 °C22 January 1949	25.7 °C	2,710 mm	60
1948	31.9 °C7 May 1948	21.8 °C9 January 1948	25.9 °C	1,777 mm	67
1947	31.1 °C17 March 1947	21.6 °C29 December 1947	26.0 °C	2,442 mm	36
1946	31.3 °C21 June 1946	22.2 °C21 January 1946	25.8 °C	2,283 mm	32
1945	31.2 °C22 June 1945	21.8 °C29 December 1945	25.6 °C	3,009 mm	21
1944	31.9 °C13 May 1944	20.6 °C1 February 1944	26.0 °C	2,431 mm	62
1943	33.8 °C19 June 1943	21.4 °C23 January 1943	25.9 °C	1,699 mm	78
1942	31.4 °C11 May 1942	21.5 °C22 December 1942	25.8 °C	2,287 mm	92
1941	33.3 °C12 April 1941	22.4 °C28 January 1941	26.1 °C	2,118 mm	89
1940	32.6 °C9 July 1940	21.3 °C23 January 1940	26.1 °C	1,755 mm	96

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

31.0 °C

+0.9 °C

Hot days (≥ 30 °C)

294 d/yr

+94

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2861 mm

+626 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.4 °C	+1.3 °C	371 mm	+213 mm
Feb	30.1 °C	+0.7 °C	198 mm	+107 mm
Mar	30.5 °C	+0.2 °C	199 mm	+103 mm
Apr	31.2 °C	+0.3 °C	150 mm	+17 mm
May	31.7 °C	+0.7 °C	207 mm	+23 mm
Jun	31.8 °C	+1.1 °C	145 mm	-49 mm
Jul	32.0 °C	+1.5 °C	117 mm	-70 mm
Aug	31.0 °C	+0.5 °C	252 mm	+52 mm
Sep	30.9 °C	+0.7 °C	357 mm	+128 mm
Oct	30.9 °C	+1.1 °C	313 mm	+41 mm
Nov	30.6 °C	+1.0 °C	254 mm	-8 mm
Dec	30.4 °C	+1.0 °C	297 mm	+70 mm

The year's extremes

Hottest day

34.2 °C

13 Jun 2025

Coldest day

23.4 °C

5 Oct 2025

Wettest day

92.0 mm

21 Dec 2025

Windiest day

33.9 km/h

9 Feb 2025

Strongest gust

48.6 km/h

9 Feb 2025

Hottest feels-like

42.1 °C

14 Jun 2025

Coldest feels-like

25.7 °C

9 Feb 2025

Sunniest day

12.1 h

25 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 Serasa?

Serasa has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 2,235 mm of precipitation per year.

What is the hottest day ever recorded in Serasa?

The hottest day measured in Serasa between 1940 and 2025 was 2 June 1998, reaching 36.1 °C.

What is the coldest day in Serasa?

The coldest day measured in Serasa between 1940 and 2025 was 21 February 1965, at 20.3 °C.

Does it snow in Serasa?

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

Has the climate of Serasa warmed?

Yes: Serasa warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Serasa?

The wettest day measured in Serasa between 1940 and 2025 was 5 June 1991, with 290 mm of rain in 24 hours.

What was the windiest day in Serasa?

The windiest day measured in Serasa between 1940 and 2025 was 22 December 2024, with winds reaching 44.9 km/h.

What is the warmest month in Serasa?

The warmest month in Serasa is May (27.5 °C on average); the coldest is January (26.2 °C).

How much does it rain in Serasa?

Serasa receives on average 2,235 mm of precipitation per year, spread over about 272 rainy days.

Is it sunny in Serasa?

Serasa gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.

Are there tropical nights in Serasa?

Yes: Serasa has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Serasa?

In Serasa, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 12 May 2024, and the lowest was 21.9 °C on 21 January 1950.

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