Nunukan climate — normals and trends

Q: What is the climate of Nunukan?

Nunukan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 2,281 mm of precipitation per year.

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

The hottest day measured in Nunukan between 1940 and 2025 was 15 March 2010, reaching 34.3 °C.

Q: What is the coldest day in Nunukan?

The coldest day measured in Nunukan between 1940 and 2025 was 1 July 1949, at 21.3 °C.

Q: Does it snow in Nunukan?

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

Q: Has the climate of Nunukan warmed?

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

Q: What is the wettest day in Nunukan?

The wettest day measured in Nunukan between 1940 and 2025 was 26 May 1949, with 108 mm of rain in 24 hours.

Q: What was the windiest day in Nunukan?

The windiest day measured in Nunukan between 1940 and 2025 was 5 March 1977, with winds reaching 18.3 km/h.

Q: What is the warmest month in Nunukan?

The warmest month in Nunukan is May (26.8 °C on average); the coldest is January (26.0 °C).

Q: How much does it rain in Nunukan?

Nunukan receives on average 2,281 mm of precipitation per year, spread over about 322 rainy days.

Q: Is it sunny in Nunukan?

Nunukan gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Nunukan (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.4 °C and it receives 2,281 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 (26.8 °C on average) and the coldest is January (26.0 °C). Rainfall peaks in May.

Nunukan averages 0 frost days, 139 hot days (≥ 30 °C) and 322 rainy days per year.

Nunukan 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 34.3 °C (on 15 March 2010) and the coldest 21.3 °C (on 1 July 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

NunukanNorth Kalimantan

coords: 4.14°, 117.65°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthMayColdest monthJanuaryWettest monthMayDriest monthFebruary

Mean daily temperature

26.4°C

Average daily high

29.6°C

Average daily low

24.0°C

Annual rainfall

2,281mm

Sunshine / day

10.2h

Mean relative humidity

86%

Average peak wind

8.2km/h

Seasonal range

0.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

139 d/yr

Rainy days (≥ 1 mm)

322 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.1 °C

Average feels-like low

28.7 °C

Average peak gust

23.2 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

17.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °C

since 1940

+0.2 °C per decade · r² = 0.87 · 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

34.3 °C

15 March 2010

Coldest day

21.3 °C

1 July 1949

Wettest day

108 mm

26 May 1949

Windiest day

18.3 km/h

5 March 1977

Strongest gust

52.9 km/h

29 November 1955

Hottest feels-like

42.9 °C

13 April 2016

Coldest feels-like

23.7 °C

22 January 1961

Sunniest day

12.0 h

27 April 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.0 °C4 March 2025	23.3 °C29 October 2025	27.3 °C	3,207 mm	285
2024	34.3 °C13 March 2024	24.0 °C28 September 2024	27.9 °C	2,783 mm	321
2023	33.9 °C17 December 2023	23.3 °C4 February 2023	27.6 °C	2,917 mm	325
2022	33.5 °C24 April 2022	23.0 °C22 September 2022	27.1 °C	3,219 mm	276
2021	33.5 °C16 October 2021	23.3 °C17 June 2021	27.1 °C	2,795 mm	277
2020	34.1 °C15 March 2020	23.4 °C23 January 2020	27.4 °C	2,402 mm	306
2019	34.3 °C19 March 2019	23.1 °C1 March 2019	27.6 °C	1,941 mm	330
2018	33.5 °C17 March 2018	23.1 °C6 August 2018	27.4 °C	2,539 mm	311
2017	33.5 °C18 October 2017	23.5 °C13 March 2017	27.3 °C	2,950 mm	301
2016	34.0 °C23 March 2016	23.6 °C30 October 2016	27.6 °C	2,603 mm	326
2015	32.8 °C27 February 2015	22.9 °C6 March 2015	27.4 °C	1,814 mm	308
2014	33.5 °C10 June 2014	22.4 °C23 February 2014	27.1 °C	2,323 mm	292
2013	32.8 °C18 April 2013	22.7 °C2 February 2013	27.0 °C	2,587 mm	274
2012	32.6 °C18 May 2012	23.1 °C28 January 2012	26.9 °C	2,952 mm	243
2011	32.5 °C23 December 2011	22.7 °C22 October 2011	26.9 °C	2,848 mm	245
2010	34.3 °C15 March 2010	23.1 °C6 February 2010	27.3 °C	2,183 mm	287
2009	32.9 °C17 September 2009	23.1 °C5 February 2009	27.1 °C	2,430 mm	274
2008	32.4 °C23 May 2008	22.9 °C13 February 2008	26.7 °C	2,855 mm	225
2007	32.8 °C3 April 2007	23.0 °C24 July 2007	26.9 °C	2,499 mm	232
2006	32.4 °C5 March 2006	23.2 °C3 January 2006	26.9 °C	2,066 mm	229
2005	33.2 °C17 March 2005	22.7 °C20 January 2005	27.0 °C	1,986 mm	256
2004	32.5 °C29 April 2004	22.8 °C12 September 2004	26.9 °C	1,749 mm	224
2003	32.9 °C4 March 2003	23.0 °C23 August 2003	26.8 °C	1,917 mm	210
2002	33.4 °C2 May 2002	23.0 °C12 September 2002	27.0 °C	1,511 mm	249
2001	32.7 °C6 May 2001	22.9 °C30 December 2001	26.7 °C	2,259 mm	203
2000	32.4 °C10 May 2000	22.9 °C19 January 2000	26.6 °C	2,580 mm	192
1999	32.0 °C4 June 1999	22.7 °C6 September 1999	26.6 °C	2,711 mm	178
1998	33.4 °C19 March 1998	22.7 °C1 February 1998	27.2 °C	1,959 mm	253
1997	32.5 °C17 October 1997	22.5 °C2 January 1997	26.8 °C	1,645 mm	235
1996	32.8 °C7 April 1996	22.2 °C31 December 1996	26.7 °C	2,376 mm	198
1995	31.8 °C10 April 1995	22.8 °C23 February 1995	26.7 °C	2,124 mm	199
1994	32.0 °C12 November 1994	22.7 °C17 February 1994	26.6 °C	2,050 mm	187
1993	32.2 °C11 April 1993	21.5 °C29 January 1993	26.6 °C	1,865 mm	180
1992	32.5 °C20 April 1992	22.2 °C22 February 1992	26.6 °C	1,770 mm	217
1991	32.7 °C12 March 1991	22.3 °C7 January 1991	26.6 °C	1,998 mm	182
1990	32.4 °C6 March 1990	22.6 °C22 January 1990	26.7 °C	2,064 mm	203
1989	32.5 °C21 April 1989	22.3 °C9 January 1989	26.4 °C	2,503 mm	161
1988	32.2 °C25 October 1988	22.3 °C10 December 1988	26.5 °C	2,545 mm	183
1987	31.9 °C21 February 1987	22.2 °C24 January 1987	26.7 °C	1,973 mm	200
1986	32.2 °C1 May 1986	22.2 °C23 February 1986	26.3 °C	2,090 mm	113
1985	31.8 °C10 April 1985	22.1 °C24 January 1985	26.2 °C	2,199 mm	84
1984	31.1 °C24 March 1984	22.7 °C22 January 1984	26.0 °C	2,618 mm	59
1983	33.0 °C2 April 1983	22.6 °C3 March 1983	26.6 °C	1,878 mm	132
1982	31.7 °C13 March 1982	22.5 °C5 January 1982	26.3 °C	1,835 mm	78
1981	31.5 °C27 January 1981	22.6 °C17 February 1981	26.3 °C	2,152 mm	98
1980	32.0 °C23 March 1980	22.7 °C5 March 1980	26.4 °C	2,333 mm	111
1979	31.9 °C22 May 1979	22.4 °C16 April 1979	26.5 °C	2,019 mm	147
1978	31.5 °C20 May 1978	22.3 °C26 January 1978	26.3 °C	2,655 mm	89
1977	31.0 °C3 March 1977	21.8 °C20 December 1977	26.1 °C	2,696 mm	60
1976	31.5 °C21 October 1976	22.2 °C27 January 1976	26.0 °C	2,333 mm	50
1975	31.4 °C8 April 1975	22.0 °C17 January 1975	25.8 °C	2,704 mm	45
1974	31.3 °C1 November 1974	21.9 °C13 February 1974	25.8 °C	2,463 mm	43
1973	33.1 °C2 March 1973	22.6 °C6 December 1973	26.2 °C	2,472 mm	91
1972	31.3 °C2 May 1972	22.3 °C5 January 1972	26.1 °C	1,944 mm	44
1971	31.8 °C12 April 1971	22.2 °C1 March 1971	25.7 °C	2,585 mm	51
1970	31.3 °C12 March 1970	22.3 °C2 March 1970	25.9 °C	2,856 mm	49
1969	31.2 °C3 February 1969	22.3 °C11 August 1969	26.0 °C	2,341 mm	56
1968	32.2 °C22 February 1968	21.9 °C25 January 1968	25.8 °C	2,390 mm	45
1967	30.6 °C9 February 1967	21.7 °C31 January 1967	25.7 °C	2,093 mm	15
1966	30.7 °C16 April 1966	22.2 °C25 February 1966	25.6 °C	2,268 mm	8
1965	30.9 °C9 March 1965	21.7 °C14 January 1965	25.7 °C	1,952 mm	20
1964	31.5 °C28 January 1964	22.0 °C19 December 1964	25.9 °C	2,368 mm	53
1963	31.3 °C24 April 1963	21.8 °C12 February 1963	25.8 °C	2,376 mm	61
1962	30.8 °C18 April 1962	22.2 °C13 March 1962	25.8 °C	2,745 mm	38
1961	31.0 °C8 May 1961	22.1 °C21 January 1961	26.0 °C	2,105 mm	59
1960	31.5 °C24 March 1960	22.6 °C16 February 1960	26.1 °C	2,430 mm	82
1959	33.2 °C11 March 1959	22.0 °C11 March 1959	26.1 °C	2,121 mm	86
1958	32.7 °C8 April 1958	22.1 °C22 December 1958	26.3 °C	2,118 mm	98
1957	31.2 °C28 February 1957	21.8 °C5 February 1957	26.1 °C	2,161 mm	65
1956	31.4 °C27 March 1956	22.0 °C27 January 1956	25.7 °C	2,532 mm	35
1955	31.4 °C22 March 1955	22.2 °C15 January 1955	25.7 °C	2,727 mm	39
1954	31.1 °C13 May 1954	22.2 °C7 January 1954	25.7 °C	2,466 mm	19
1953	32.0 °C21 March 1953	22.5 °C14 January 1953	26.1 °C	1,543 mm	48
1952	31.2 °C1 February 1952	22.3 °C25 September 1952	26.1 °C	1,769 mm	47
1951	31.5 °C30 March 1951	22.2 °C11 January 1951	25.9 °C	1,747 mm	39
1950	31.3 °C9 March 1950	22.1 °C29 December 1950	25.7 °C	2,148 mm	31
1949	30.5 °C14 April 1949	21.3 °C1 July 1949	25.4 °C	2,963 mm	12
1948	30.0 °C17 March 1948	22.0 °C23 January 1948	25.5 °C	2,053 mm	1
1947	30.7 °C15 April 1947	22.1 °C15 January 1947	25.6 °C	2,000 mm	4
1946	30.0 °C15 May 1946	22.1 °C24 November 1946	25.6 °C	1,897 mm	2
1945	30.3 °C8 February 1945	22.1 °C14 January 1945	25.4 °C	2,643 mm	2
1944	31.1 °C11 February 1944	22.0 °C25 February 1944	25.7 °C	1,872 mm	17
1943	30.0 °C7 March 1943	21.4 °C18 March 1943	25.3 °C	1,741 mm	1
1942	31.0 °C19 March 1942	21.8 °C22 January 1942	25.5 °C	1,857 mm	8
1941	30.4 °C12 March 1941	21.7 °C4 February 1941	25.7 °C	1,740 mm	6
1940	31.3 °C3 March 1940	21.5 °C18 January 1940	25.8 °C	1,664 mm	9

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

30.8 °C

+1.2 °C

Hot days (≥ 30 °C)

285 d/yr

+146

Frost days (< 0 °C)

0 d/yr

Annual rainfall

3207 mm

+926 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.5 °C	+1.3 °C	398 mm	+237 mm
Feb	30.4 °C	+0.9 °C	219 mm	+83 mm
Mar	30.4 °C	+0.5 °C	292 mm	+135 mm
Apr	30.9 °C	+0.9 °C	232 mm	+56 mm
May	31.3 °C	+1.4 °C	340 mm	+113 mm
Jun	30.5 °C	+1.0 °C	199 mm	-16 mm
Jul	31.3 °C	+2.0 °C	152 mm	-47 mm
Aug	30.3 °C	+0.9 °C	255 mm	+56 mm
Sep	30.9 °C	+1.4 °C	322 mm	+120 mm
Oct	30.7 °C	+1.1 °C	251 mm	+30 mm
Nov	31.1 °C	+1.6 °C	309 mm	+109 mm
Dec	30.8 °C	+1.4 °C	237 mm	+51 mm

The year's extremes

Hottest day

33.0 °C

4 Mar 2025

Coldest day

23.3 °C

29 Oct 2025

Wettest day

56.4 mm

29 Jan 2025

Windiest day

13.3 km/h

18 Mar 2025

Strongest gust

38.2 km/h

28 May 2025

Hottest feels-like

41.8 °C

21 Oct 2025

Coldest feels-like

27.2 °C

23 Aug 2025

Sunniest day

12.0 h

4 May 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 Nunukan?

Nunukan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 2,281 mm of precipitation per year.

What is the hottest day ever recorded in Nunukan?

The hottest day measured in Nunukan between 1940 and 2025 was 15 March 2010, reaching 34.3 °C.

What is the coldest day in Nunukan?

The coldest day measured in Nunukan between 1940 and 2025 was 1 July 1949, at 21.3 °C.

Does it snow in Nunukan?

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

Has the climate of Nunukan warmed?

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

What is the wettest day in Nunukan?

The wettest day measured in Nunukan between 1940 and 2025 was 26 May 1949, with 108 mm of rain in 24 hours.

What was the windiest day in Nunukan?

The windiest day measured in Nunukan between 1940 and 2025 was 5 March 1977, with winds reaching 18.3 km/h.

What is the warmest month in Nunukan?

The warmest month in Nunukan is May (26.8 °C on average); the coldest is January (26.0 °C).

How much does it rain in Nunukan?

Nunukan receives on average 2,281 mm of precipitation per year, spread over about 322 rainy days.

Is it sunny in Nunukan?

Nunukan gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.

Are there tropical nights in Nunukan?

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

What was the most extreme apparent temperature in Nunukan?

In Nunukan, between 1940 and 2025, the highest apparent temperature reached 42.9 °C on 13 April 2016, and the lowest was 23.7 °C on 22 January 1961.

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