Dehiwala-Mount Lavinia climate — normals and trends

Q: What is the climate of Dehiwala-Mount Lavinia?

Dehiwala-Mount Lavinia has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 2,393 mm of precipitation per year.

Q: What is the hottest day ever recorded in Dehiwala-Mount Lavinia?

The hottest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 25 February 2025, reaching 33.6 °C.

Q: What is the coldest day in Dehiwala-Mount Lavinia?

The coldest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 24 December 1971, at 20.8 °C.

Q: Does it snow in Dehiwala-Mount Lavinia?

Almost never: Dehiwala-Mount Lavinia sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Dehiwala-Mount Lavinia warmed?

Yes: Dehiwala-Mount Lavinia warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Dehiwala-Mount Lavinia?

The wettest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 15 May 2016, with 196 mm of rain in 24 hours.

Q: What was the windiest day in Dehiwala-Mount Lavinia?

The windiest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 30 November 2017, with winds reaching 52.2 km/h.

Q: What is the warmest month in Dehiwala-Mount Lavinia?

The warmest month in Dehiwala-Mount Lavinia is April (27.7 °C on average); the coldest is December (26.2 °C).

Q: How much does it rain in Dehiwala-Mount Lavinia?

Dehiwala-Mount Lavinia receives on average 2,393 mm of precipitation per year, spread over about 267 rainy days.

Q: Is it sunny in Dehiwala-Mount Lavinia?

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

Dehiwala-Mount Lavinia (Sri Lanka) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.8 °C and it receives 2,393 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 April (27.7 °C on average) and the coldest is December (26.2 °C). Rainfall peaks in May.

Dehiwala-Mount Lavinia averages 0 frost days, 50 hot days (≥ 30 °C) and 267 rainy days per year.

Dehiwala-Mount Lavinia has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.

The hottest day of the period reached 33.6 °C (on 25 February 2025) and the coldest 20.8 °C (on 24 December 1971).

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

Dehiwala-Mount LaviniaWestern Province

coords: 6.84°, 79.87°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthAprilColdest monthDecemberWettest monthMayDriest monthFebruary

Mean daily temperature

26.8°C

Average daily high

28.6°C

Average daily low

25.3°C

Annual rainfall

2,393mm

Sunshine / day

10.1h

Mean relative humidity

82%

Average peak wind

19.8km/h

Seasonal range

1.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

50 d/yr

Rainy days (≥ 1 mm)

267 d/yr

Annual snowfall

0.0 cm

Average feels-like high

33.4 °C

Average feels-like low

28.8 °C

Average peak gust

33.8 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

19.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.4 °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

33.6 °C

25 February 2025

Coldest day

20.8 °C

24 December 1971

Wettest day

196 mm

15 May 2016

Windiest day

52.2 km/h

30 November 2017

Strongest gust

84.2 km/h

30 November 2017

Hottest feels-like

41.2 °C

28 April 2024

Coldest feels-like

19.7 °C

19 February 1961

Sunniest day

12.1 h

16 June 1971

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.6 °C25 February 2025	23.7 °C4 February 2025	27.6 °C	2,331 mm	104
2024	33.4 °C28 February 2024	24.1 °C16 January 2024	28.0 °C	2,884 mm	156
2023	32.0 °C23 April 2023	22.6 °C13 January 2023	27.5 °C	3,249 mm	98
2022	32.8 °C1 March 2022	23.3 °C9 December 2022	27.4 °C	2,249 mm	99
2021	32.3 °C22 February 2021	23.0 °C11 February 2021	27.4 °C	2,553 mm	94
2020	32.9 °C12 February 2020	23.6 °C14 January 2020	27.8 °C	1,934 mm	149
2019	32.5 °C31 January 2019	23.2 °C19 January 2019	27.6 °C	2,540 mm	127
2018	32.2 °C16 February 2018	22.6 °C8 January 2018	27.2 °C	2,191 mm	84
2017	31.8 °C16 February 2017	22.5 °C8 January 2017	27.4 °C	2,171 mm	75
2016	32.5 °C24 March 2016	22.5 °C24 December 2016	27.8 °C	1,942 mm	143
2015	32.2 °C21 February 2015	23.3 °C11 January 2015	27.5 °C	2,762 mm	103
2014	32.3 °C17 March 2014	23.7 °C5 January 2014	27.3 °C	2,544 mm	103
2013	32.0 °C1 February 2013	22.9 °C14 January 2013	27.2 °C	2,099 mm	83
2012	31.8 °C3 February 2012	22.1 °C16 November 2012	27.2 °C	2,263 mm	49
2011	32.5 °C17 March 2011	22.0 °C13 January 2011	27.1 °C	2,280 mm	31
2010	32.0 °C11 March 2010	22.6 °C24 December 2010	27.3 °C	2,616 mm	100
2009	31.5 °C19 January 2009	22.7 °C6 February 2009	27.3 °C	2,329 mm	65
2008	31.0 °C17 February 2008	22.7 °C19 January 2008	27.0 °C	2,860 mm	18
2007	32.1 °C20 February 2007	22.5 °C1 January 2007	27.3 °C	2,430 mm	91
2006	31.6 °C6 February 2006	21.8 °C31 December 2006	27.2 °C	3,013 mm	59
2005	32.6 °C11 February 2005	22.6 °C27 December 2005	27.3 °C	2,362 mm	83
2004	32.3 °C15 February 2004	22.3 °C22 December 2004	27.2 °C	2,604 mm	94
2003	31.6 °C31 December 2003	22.5 °C3 January 2003	27.2 °C	2,451 mm	62
2002	32.2 °C20 March 2002	22.0 °C29 December 2002	27.2 °C	2,288 mm	66
2001	31.1 °C1 April 2001	22.0 °C11 February 2001	27.0 °C	2,005 mm	31
2000	30.8 °C16 November 2000	23.0 °C26 December 2000	26.7 °C	2,345 mm	12
1999	31.5 °C15 February 1999	21.9 °C31 January 1999	26.7 °C	2,555 mm	17
1998	32.9 °C2 February 1998	24.1 °C23 December 1998	27.7 °C	2,532 mm	124
1997	31.7 °C22 April 1997	22.2 °C28 January 1997	27.1 °C	2,806 mm	53
1996	32.4 °C18 February 1996	22.4 °C25 December 1996	26.9 °C	2,266 mm	43
1995	31.5 °C6 January 1995	22.8 °C24 January 1995	27.0 °C	2,271 mm	49
1994	31.2 °C27 February 1994	22.6 °C27 January 1994	26.8 °C	2,207 mm	31
1993	31.5 °C4 February 1993	22.0 °C9 February 1993	26.8 °C	2,189 mm	43
1992	31.9 °C8 April 1992	22.6 °C27 December 1992	26.9 °C	2,002 mm	77
1991	32.0 °C27 March 1991	22.5 °C29 January 1991	27.0 °C	2,162 mm	54
1990	31.7 °C7 February 1990	22.5 °C20 January 1990	27.0 °C	2,248 mm	58
1989	31.2 °C7 April 1989	22.6 °C23 January 1989	26.8 °C	2,315 mm	48
1988	32.3 °C29 January 1988	22.8 °C29 November 1988	27.2 °C	2,462 mm	85
1987	31.3 °C7 February 1987	23.1 °C2 February 1987	27.3 °C	2,002 mm	74
1986	30.8 °C6 March 1986	23.0 °C22 February 1986	26.7 °C	1,721 mm	11
1985	31.0 °C5 May 1985	22.8 °C25 November 1985	26.7 °C	2,358 mm	41
1984	30.8 °C25 February 1984	22.5 °C12 December 1984	26.5 °C	2,240 mm	8
1983	31.9 °C13 April 1983	21.6 °C4 January 1983	27.4 °C	1,710 mm	95
1982	31.2 °C30 January 1982	23.1 °C23 January 1982	26.9 °C	2,134 mm	45
1981	31.5 °C20 February 1981	22.1 °C7 January 1981	26.9 °C	1,680 mm	52
1980	31.8 °C21 February 1980	23.3 °C24 January 1980	27.2 °C	1,649 mm	71
1979	32.0 °C9 April 1979	23.0 °C12 January 1979	27.1 °C	2,325 mm	63
1978	32.9 °C27 February 1978	23.8 °C17 January 1978	26.7 °C	2,572 mm	63
1977	31.4 °C24 January 1977	22.2 °C30 January 1977	26.7 °C	2,269 mm	38
1976	31.0 °C26 January 1976	22.4 °C21 January 1976	26.6 °C	2,076 mm	41
1975	31.5 °C20 February 1975	21.5 °C10 January 1975	26.4 °C	2,660 mm	26
1974	31.1 °C23 March 1974	22.0 °C15 January 1974	26.5 °C	1,740 mm	36
1973	32.2 °C7 February 1973	23.0 °C12 December 1973	26.9 °C	2,147 mm	88
1972	31.1 °C4 March 1972	22.2 °C6 January 1972	26.7 °C	2,201 mm	29
1971	31.8 °C16 February 1971	20.8 °C24 December 1971	26.4 °C	2,135 mm	22
1970	30.8 °C14 February 1970	21.9 °C4 December 1970	26.6 °C	2,545 mm	20
1969	31.1 °C5 March 1969	22.9 °C3 January 1969	26.8 °C	2,752 mm	36
1968	31.6 °C12 March 1968	22.5 °C28 January 1968	26.5 °C	2,416 mm	17
1967	31.3 °C19 February 1967	22.7 °C7 January 1967	26.5 °C	3,192 mm	20
1966	31.6 °C8 February 1966	22.7 °C2 January 1966	26.6 °C	3,095 mm	15
1965	30.8 °C30 January 1965	23.3 °C11 January 1965	26.4 °C	3,642 mm	15
1964	32.0 °C13 February 1964	22.5 °C19 January 1964	26.4 °C	3,007 mm	17
1963	30.5 °C19 February 1963	22.4 °C24 January 1963	26.3 °C	2,857 mm	6
1962	30.5 °C15 February 1962	22.3 °C31 December 1962	26.5 °C	2,691 mm	10
1961	31.0 °C10 March 1961	21.3 °C19 February 1961	26.4 °C	2,269 mm	8
1960	30.9 °C18 February 1960	22.8 °C28 January 1960	26.4 °C	2,272 mm	14
1959	32.7 °C20 March 1959	23.6 °C20 December 1959	26.7 °C	2,348 mm	31
1958	33.1 °C7 March 1958	23.1 °C24 December 1958	26.8 °C	2,527 mm	33
1957	31.1 °C17 February 1957	22.1 °C26 January 1957	26.6 °C	2,386 mm	25
1956	30.7 °C7 April 1956	21.8 °C13 February 1956	26.0 °C	2,490 mm	8
1955	30.4 °C10 March 1955	22.1 °C30 December 1955	26.0 °C	2,954 mm	2
1954	31.3 °C1 March 1954	22.7 °C29 January 1954	26.2 °C	2,942 mm	14
1953	31.4 °C10 February 1953	22.6 °C29 January 1953	26.7 °C	1,769 mm	56
1952	31.8 °C29 January 1952	22.8 °C17 January 1952	26.8 °C	1,742 mm	69
1951	31.1 °C20 December 1951	22.9 °C18 December 1951	26.6 °C	1,967 mm	31
1950	31.3 °C7 April 1950	22.4 °C2 January 1950	26.5 °C	1,444 mm	21
1949	30.7 °C3 February 1949	23.1 °C11 January 1949	26.4 °C	1,983 mm	18
1948	30.2 °C23 April 1948	22.8 °C29 December 1948	26.4 °C	2,496 mm	3
1947	30.5 °C21 February 1947	22.3 °C29 December 1947	26.4 °C	2,118 mm	5
1946	31.3 °C12 March 1946	22.3 °C16 January 1946	26.4 °C	2,584 mm	28
1945	31.0 °C9 March 1945	22.1 °C14 December 1945	26.4 °C	2,688 mm	16
1944	31.1 °C18 February 1944	22.4 °C7 February 1944	26.2 °C	3,101 mm	3
1943	31.1 °C9 February 1943	22.3 °C20 January 1943	25.9 °C	2,653 mm	19
1942	31.2 °C8 February 1942	22.2 °C26 January 1942	26.0 °C	2,574 mm	9
1941	31.4 °C2 February 1941	22.7 °C15 January 1941	26.4 °C	2,695 mm	48
1940	30.8 °C28 March 1940	22.9 °C12 January 1940	26.2 °C	2,646 mm	14

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

29.4 °C

+0.8 °C

Hot days (≥ 30 °C)

104 d/yr

+54

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2331 mm

-62 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.8 °C	-0.3 °C	167 mm	+104 mm
Feb	31.1 °C	+1.5 °C	39 mm	-14 mm
Mar	30.4 °C	+0.7 °C	117 mm	+29 mm
Apr	30.0 °C	+0.4 °C	243 mm	+76 mm
May	30.0 °C	+1.0 °C	202 mm	-116 mm
Jun	29.2 °C	+1.0 °C	228 mm	-59 mm
Jul	28.9 °C	+1.0 °C	136 mm	-85 mm
Aug	28.5 °C	+0.8 °C	97 mm	-110 mm
Sep	29.0 °C	+1.2 °C	149 mm	-88 mm
Oct	29.1 °C	+1.1 °C	354 mm	+50 mm
Nov	28.6 °C	+0.4 °C	491 mm	+204 mm
Dec	29.3 °C	+0.8 °C	108 mm	-54 mm

The year's extremes

Hottest day

33.6 °C

25 Feb 2025

Coldest day

23.7 °C

4 Feb 2025

Wettest day

127.2 mm

28 Nov 2025

Windiest day

45.8 km/h

27 Nov 2025

Strongest gust

80.3 km/h

28 Nov 2025

Hottest feels-like

38.9 °C

21 Mar 2025

Coldest feels-like

22.8 °C

28 Nov 2025

Sunniest day

12.0 h

30 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 Dehiwala-Mount Lavinia?

Dehiwala-Mount Lavinia has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 2,393 mm of precipitation per year.

What is the hottest day ever recorded in Dehiwala-Mount Lavinia?

The hottest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 25 February 2025, reaching 33.6 °C.

What is the coldest day in Dehiwala-Mount Lavinia?

The coldest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 24 December 1971, at 20.8 °C.

Does it snow in Dehiwala-Mount Lavinia?

Almost never: Dehiwala-Mount Lavinia sees virtually no snow, with about 0 frost days per year.

Has the climate of Dehiwala-Mount Lavinia warmed?

Yes: Dehiwala-Mount Lavinia warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Dehiwala-Mount Lavinia?

The wettest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 15 May 2016, with 196 mm of rain in 24 hours.

What was the windiest day in Dehiwala-Mount Lavinia?

The windiest day measured in Dehiwala-Mount Lavinia between 1940 and 2025 was 30 November 2017, with winds reaching 52.2 km/h.

What is the warmest month in Dehiwala-Mount Lavinia?

The warmest month in Dehiwala-Mount Lavinia is April (27.7 °C on average); the coldest is December (26.2 °C).

How much does it rain in Dehiwala-Mount Lavinia?

Dehiwala-Mount Lavinia receives on average 2,393 mm of precipitation per year, spread over about 267 rainy days.

Is it sunny in Dehiwala-Mount Lavinia?

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

Are there tropical nights in Dehiwala-Mount Lavinia?

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

What was the most extreme apparent temperature in Dehiwala-Mount Lavinia?

In Dehiwala-Mount Lavinia, between 1940 and 2025, the highest apparent temperature reached 41.2 °C on 28 April 2024, and the lowest was 19.7 °C on 19 February 1961.

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