Kalmunai climate — normals and trends

Q: What is the climate of Kalmunai?

Kalmunai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.3 °C and it receives 1,315 mm of precipitation per year.

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

The hottest day measured in Kalmunai between 1940 and 2025 was 13 June 1998, reaching 35.2 °C.

Q: What is the coldest day in Kalmunai?

The coldest day measured in Kalmunai between 1940 and 2025 was 7 February 1957, at 20.3 °C.

Q: Does it snow in Kalmunai?

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

Q: Has the climate of Kalmunai warmed?

Yes: Kalmunai warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Kalmunai?

The wettest day measured in Kalmunai between 1940 and 2025 was 20 November 2005, with 224 mm of rain in 24 hours.

Q: What was the windiest day in Kalmunai?

The windiest day measured in Kalmunai between 1940 and 2025 was 24 November 1978, with winds reaching 47.6 km/h.

Q: What is the warmest month in Kalmunai?

The warmest month in Kalmunai is June (29.1 °C on average); the coldest is January (25.2 °C).

Q: How much does it rain in Kalmunai?

Kalmunai receives on average 1,315 mm of precipitation per year, spread over about 180 rainy days.

Q: Is it sunny in Kalmunai?

Kalmunai gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.

Kalmunai (Sri Lanka) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.3 °C and it receives 1,315 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 June (29.1 °C on average) and the coldest is January (25.2 °C). Rainfall peaks in December.

Kalmunai averages 0 frost days, 161 hot days (≥ 30 °C) and 180 rainy days per year.

Kalmunai has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.2 °C (on 13 June 1998) and the coldest 20.3 °C (on 7 February 1957).

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

KalmunaiEastern Province

coords: 7.41°, 81.83°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthJuneColdest monthJanuaryWettest monthDecemberDriest monthJune

Mean daily temperature

27.3°C

Average daily high

29.4°C

Average daily low

25.5°C

Annual rainfall

1,315mm

Sunshine / day

10.5h

Mean relative humidity

78%

Average peak wind

15.9km/h

Seasonal range

3.9°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

161 d/yr

Rainy days (≥ 1 mm)

180 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.7 °C

Average feels-like low

29.5 °C

Average peak gust

27.9 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

19.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °C

since 1940

+0.1 °C per decade · r² = 0.66 · 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

35.2 °C

13 June 1998

Coldest day

20.3 °C

7 February 1957

Wettest day

224 mm

20 November 2005

Windiest day

47.6 km/h

24 November 1978

Strongest gust

85.7 km/h

23 November 1978

Hottest feels-like

42.8 °C

20 May 1988

Coldest feels-like

17.5 °C

8 December 2022

Sunniest day

12.4 h

7 June 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.2 °C28 May 2025	23.4 °C7 March 2025	27.9 °C	1,677 mm	199
2024	34.7 °C19 July 2024	23.5 °C16 January 2024	28.1 °C	1,543 mm	197
2023	34.3 °C22 July 2023	22.9 °C11 January 2023	27.7 °C	1,787 mm	181
2022	33.5 °C13 July 2022	20.9 °C8 December 2022	27.4 °C	1,485 mm	163
2021	34.0 °C17 June 2021	23.0 °C12 February 2021	27.6 °C	1,347 mm	177
2020	33.8 °C11 June 2020	23.3 °C16 January 2020	27.8 °C	1,217 mm	189
2019	34.3 °C2 July 2019	23.2 °C18 January 2019	27.7 °C	1,351 mm	178
2018	33.4 °C6 August 2018	22.1 °C7 January 2018	27.3 °C	1,472 mm	159
2017	33.8 °C29 May 2017	22.2 °C11 January 2017	27.6 °C	1,313 mm	185
2016	34.6 °C30 June 2016	20.8 °C1 December 2016	28.2 °C	884 mm	210
2015	34.0 °C24 July 2015	21.8 °C19 March 2015	27.6 °C	1,704 mm	172
2014	34.4 °C16 June 2014	21.7 °C12 February 2014	27.5 °C	1,925 mm	173
2013	33.6 °C10 June 2013	23.3 °C19 January 2013	27.7 °C	1,662 mm	198
2012	35.0 °C10 June 2012	21.6 °C1 January 2012	27.7 °C	1,319 mm	184
2011	34.0 °C17 June 2011	21.9 °C28 December 2011	27.4 °C	2,634 mm	161
2010	33.4 °C28 July 2010	22.3 °C28 December 2010	27.7 °C	1,661 mm	195
2009	34.0 °C20 July 2009	22.7 °C14 February 2009	27.7 °C	1,326 mm	178
2008	32.9 °C16 June 2008	22.2 °C25 February 2008	27.3 °C	1,710 mm	151
2007	33.3 °C6 July 2007	22.0 °C20 March 2007	27.3 °C	1,318 mm	168
2006	34.3 °C11 July 2006	21.7 °C24 January 2006	27.5 °C	1,283 mm	182
2005	34.6 °C17 June 2005	22.3 °C16 February 2005	27.8 °C	1,265 mm	185
2004	34.5 °C19 May 2004	22.1 °C1 March 2004	27.5 °C	1,540 mm	171
2003	34.1 °C1 June 2003	23.2 °C8 December 2003	27.6 °C	1,391 mm	180
2002	34.1 °C13 July 2002	22.5 °C15 January 2002	27.6 °C	1,273 mm	177
2001	34.2 °C31 May 2001	20.7 °C11 February 2001	27.6 °C	1,271 mm	181
2000	33.8 °C18 June 2000	23.0 °C23 January 2000	27.3 °C	1,682 mm	162
1999	34.7 °C28 July 1999	21.4 °C30 January 1999	27.4 °C	1,362 mm	176
1998	35.2 °C13 June 1998	23.1 °C16 January 1998	28.1 °C	1,043 mm	195
1997	34.0 °C16 July 1997	21.0 °C11 February 1997	27.3 °C	965 mm	153
1996	33.9 °C30 July 1996	22.3 °C25 December 1996	27.3 °C	1,116 mm	159
1995	34.2 °C2 July 1995	22.8 °C21 February 1995	27.4 °C	1,253 mm	164
1994	34.4 °C8 June 1994	22.3 °C9 March 1994	27.3 °C	1,418 mm	165
1993	34.5 °C9 June 1993	21.0 °C9 February 1993	27.4 °C	1,249 mm	172
1992	34.3 °C17 June 1992	21.2 °C3 March 1992	27.3 °C	1,064 mm	171
1991	34.3 °C30 July 1991	21.1 °C12 February 1991	27.5 °C	1,090 mm	190
1990	34.2 °C22 June 1990	21.6 °C20 January 1990	27.6 °C	1,114 mm	184
1989	33.3 °C30 May 1989	21.3 °C19 February 1989	27.2 °C	1,026 mm	161
1988	34.3 °C20 May 1988	21.5 °C8 February 1988	27.4 °C	1,150 mm	163
1987	34.1 °C8 June 1987	22.1 °C2 February 1987	27.6 °C	1,228 mm	169
1986	34.3 °C25 June 1986	22.2 °C3 February 1986	27.4 °C	1,256 mm	178
1985	34.5 °C28 May 1985	22.6 °C8 January 1985	27.3 °C	1,180 mm	174
1984	33.7 °C30 June 1984	22.9 °C14 December 1984	27.2 °C	1,859 mm	159
1983	34.1 °C29 May 1983	22.6 °C4 January 1983	27.7 °C	981 mm	205
1982	33.8 °C8 September 1982	21.5 °C16 February 1982	27.3 °C	1,137 mm	170
1981	34.0 °C20 June 1981	21.0 °C9 January 1981	27.2 °C	1,130 mm	154
1980	34.2 °C21 May 1980	20.6 °C30 January 1980	27.5 °C	941 mm	170
1979	34.5 °C22 June 1979	22.3 °C16 March 1979	27.5 °C	1,159 mm	162
1978	34.2 °C13 August 1978	23.0 °C19 January 1978	27.2 °C	1,563 mm	168
1977	34.1 °C9 September 1977	21.3 °C28 January 1977	27.1 °C	1,416 mm	152
1976	33.8 °C28 July 1976	20.7 °C27 February 1976	27.1 °C	1,176 mm	176
1975	33.7 °C13 June 1975	20.5 °C10 January 1975	26.9 °C	1,113 mm	150
1974	34.0 °C19 June 1974	21.7 °C10 January 1974	27.0 °C	922 mm	158
1973	33.8 °C14 May 1973	21.7 °C16 January 1973	27.5 °C	1,176 mm	178
1972	33.2 °C10 September 1972	20.4 °C6 February 1972	27.2 °C	801 mm	171
1971	33.2 °C7 June 1971	22.4 °C23 December 1971	26.9 °C	1,530 mm	154
1970	33.8 °C6 July 1970	22.1 °C3 December 1970	27.2 °C	1,499 mm	155
1969	33.6 °C29 June 1969	22.4 °C27 January 1969	27.3 °C	1,507 mm	173
1968	33.9 °C25 July 1968	20.4 °C15 February 1968	27.0 °C	1,031 mm	142
1967	33.0 °C28 May 1967	20.7 °C11 February 1967	26.8 °C	1,642 mm	143
1966	34.2 °C1 August 1966	21.8 °C2 January 1966	27.1 °C	1,269 mm	139
1965	32.9 °C29 July 1965	22.1 °C9 March 1965	26.6 °C	1,640 mm	113
1964	33.9 °C4 July 1964	22.2 °C9 March 1964	27.0 °C	1,464 mm	140
1963	33.2 °C20 June 1963	21.1 °C11 February 1963	26.8 °C	1,886 mm	149
1962	32.6 °C15 July 1962	22.1 °C1 March 1962	26.8 °C	1,544 mm	135
1961	32.8 °C27 May 1961	20.6 °C19 February 1961	26.8 °C	1,584 mm	144
1960	33.5 °C7 June 1960	22.0 °C4 February 1960	27.0 °C	1,604 mm	130
1959	33.4 °C31 May 1959	21.5 °C4 March 1959	27.2 °C	1,123 mm	163
1958	33.4 °C11 June 1958	22.7 °C5 February 1958	27.2 °C	1,175 mm	154
1957	33.6 °C16 July 1957	20.3 °C7 February 1957	27.0 °C	1,221 mm	165
1956	32.7 °C12 May 1956	21.5 °C13 February 1956	26.7 °C	1,072 mm	136
1955	32.2 °C27 June 1955	22.1 °C21 December 1955	26.6 °C	1,600 mm	99
1954	32.8 °C16 June 1954	22.7 °C5 February 1954	26.6 °C	1,275 mm	98
1953	34.4 °C19 May 1953	22.2 °C31 January 1953	27.2 °C	907 mm	137
1952	33.0 °C1 May 1952	22.2 °C18 February 1952	27.3 °C	565 mm	157
1951	33.4 °C6 June 1951	22.0 °C4 February 1951	27.2 °C	1,027 mm	160
1950	33.1 °C24 May 1950	21.5 °C3 January 1950	27.0 °C	588 mm	105
1949	34.0 °C23 April 1949	22.6 °C31 December 1949	26.9 °C	884 mm	145
1948	32.8 °C5 July 1948	22.6 °C5 February 1948	27.0 °C	1,731 mm	154
1947	32.4 °C11 July 1947	22.6 °C12 February 1947	26.8 °C	1,436 mm	125
1946	33.3 °C12 May 1946	21.9 °C16 January 1946	26.9 °C	1,214 mm	155
1945	33.7 °C15 June 1945	20.5 °C1 March 1945	26.9 °C	1,088 mm	158
1944	32.3 °C20 June 1944	22.4 °C11 December 1944	26.7 °C	1,243 mm	124
1943	32.8 °C18 September 1943	21.9 °C30 January 1943	26.6 °C	1,201 mm	137
1942	32.4 °C12 July 1942	21.8 °C26 January 1942	26.5 °C	1,454 mm	98
1941	33.9 °C23 May 1941	21.1 °C26 January 1941	27.1 °C	994 mm	157
1940	33.7 °C23 August 1940	22.1 °C13 January 1940	26.8 °C	1,140 mm	140

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

30.0 °C

+0.6 °C

Hot days (≥ 30 °C)

199 d/yr

+38

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1677 mm

+362 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	26.9 °C	+0.3 °C	366 mm	+198 mm
Feb	28.3 °C	+1.0 °C	118 mm	+28 mm
Mar	29.2 °C	+0.5 °C	99 mm	+32 mm
Apr	30.5 °C	+0.4 °C	110 mm	+43 mm
May	32.0 °C	+0.8 °C	30 mm	-30 mm
Jun	32.3 °C	+0.5 °C	8 mm	-23 mm
Jul	32.6 °C	+1.1 °C	9 mm	-29 mm
Aug	31.0 °C	-0.1 °C	51 mm	+4 mm
Sep	31.4 °C	+0.9 °C	48 mm	-23 mm
Oct	30.0 °C	+0.8 °C	128 mm	-26 mm
Nov	28.6 °C	+0.7 °C	529 mm	+282 mm
Dec	27.2 °C	+0.4 °C	183 mm	-92 mm

The year's extremes

Hottest day

34.2 °C

28 May 2025

Coldest day

23.4 °C

7 Mar 2025

Wettest day

95.5 mm

27 Nov 2025

Windiest day

47.2 km/h

27 Nov 2025

Strongest gust

72.0 km/h

27 Nov 2025

Hottest feels-like

40.9 °C

4 Jun 2025

Coldest feels-like

24.3 °C

27 Nov 2025

Sunniest day

12.4 h

7 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 Kalmunai?

Kalmunai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.3 °C and it receives 1,315 mm of precipitation per year.

What is the hottest day ever recorded in Kalmunai?

The hottest day measured in Kalmunai between 1940 and 2025 was 13 June 1998, reaching 35.2 °C.

What is the coldest day in Kalmunai?

The coldest day measured in Kalmunai between 1940 and 2025 was 7 February 1957, at 20.3 °C.

Does it snow in Kalmunai?

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

Has the climate of Kalmunai warmed?

Yes: Kalmunai warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Kalmunai?

The wettest day measured in Kalmunai between 1940 and 2025 was 20 November 2005, with 224 mm of rain in 24 hours.

What was the windiest day in Kalmunai?

The windiest day measured in Kalmunai between 1940 and 2025 was 24 November 1978, with winds reaching 47.6 km/h.

What is the warmest month in Kalmunai?

The warmest month in Kalmunai is June (29.1 °C on average); the coldest is January (25.2 °C).

How much does it rain in Kalmunai?

Kalmunai receives on average 1,315 mm of precipitation per year, spread over about 180 rainy days.

Is it sunny in Kalmunai?

Kalmunai gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.

Are there tropical nights in Kalmunai?

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

What was the most extreme apparent temperature in Kalmunai?

In Kalmunai, between 1940 and 2025, the highest apparent temperature reached 42.8 °C on 20 May 1988, and the lowest was 17.5 °C on 8 December 2022.

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