Tiruvallur climate — normals and trends

Q: What is the climate of Tiruvallur?

Tiruvallur has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.1 °C and it receives 922 mm of precipitation per year.

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

The hottest day measured in Tiruvallur between 1940 and 2025 was 1 May 1946, reaching 44.4 °C.

Q: What is the coldest day in Tiruvallur?

The coldest day measured in Tiruvallur between 1940 and 2025 was 17 January 1940, at 14.3 °C.

Q: Does it snow in Tiruvallur?

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

Q: Has the climate of Tiruvallur warmed?

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

Q: What is the wettest day in Tiruvallur?

The wettest day measured in Tiruvallur between 1940 and 2025 was 4 December 2023, with 246 mm of rain in 24 hours.

Q: What was the windiest day in Tiruvallur?

The windiest day measured in Tiruvallur between 1940 and 2025 was 12 December 2016, with winds reaching 56.3 km/h.

Q: What is the warmest month in Tiruvallur?

The warmest month in Tiruvallur is May (32.1 °C on average); the coldest is January (23.9 °C).

Q: How much does it rain in Tiruvallur?

Tiruvallur receives on average 922 mm of precipitation per year, spread over about 127 rainy days.

Q: Is it sunny in Tiruvallur?

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

Tiruvallur (India) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 28.1 °C and it receives 922 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 (32.1 °C on average) and the coldest is January (23.9 °C). Rainfall peaks in November.

Tiruvallur averages 0 frost days, 264 hot days (≥ 30 °C) and 127 rainy days per year.

Tiruvallur 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 44.4 °C (on 1 May 1946) and the coldest 14.3 °C (on 17 January 1940).

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

TiruvallurTamil Nadu

coords: 13.14°, 79.91°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthMayColdest monthJanuaryWettest monthNovemberDriest monthFebruary

Mean daily temperature

28.1°C

Average daily high

32.9°C

Average daily low

24.5°C

Annual rainfall

922mm

Sunshine / day

10.1h

Mean relative humidity

71%

Average peak wind

15.5km/h

Seasonal range

8.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

264 d/yr

Rainy days (≥ 1 mm)

127 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.7 °C

Average feels-like low

28.1 °C

Average peak gust

34.1 km/h

Tropical nights (≥ 20 °C)

334 d/yr

Solar radiation

19.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.0 °C

since 1940

+0.1 °C per decade · r² = 0.43 · 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

44.4 °C

1 May 1946

Coldest day

14.3 °C

17 January 1940

Wettest day

246 mm

4 December 2023

Windiest day

56.3 km/h

12 December 2016

Strongest gust

115.2 km/h

12 December 2016

Hottest feels-like

48.9 °C

16 May 2023

Coldest feels-like

14.1 °C

11 December 1981

Sunniest day

12.7 h

6 June 1974

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.3 °C8 July 2025	19.4 °C20 December 2025	28.8 °C	892 mm	278
2024	41.5 °C31 May 2024	19.6 °C17 January 2024	29.2 °C	1,263 mm	301
2023	41.4 °C16 May 2023	18.1 °C15 January 2023	28.8 °C	1,231 mm	290
2022	39.3 °C1 June 2022	18.9 °C3 February 2022	28.6 °C	1,233 mm	285
2021	39.9 °C2 April 2021	18.9 °C23 December 2021	28.6 °C	1,425 mm	280
2020	41.6 °C21 May 2020	18.9 °C16 February 2020	28.7 °C	1,078 mm	294
2019	41.9 °C9 June 2019	18.2 °C9 January 2019	29.2 °C	888 mm	277
2018	39.5 °C29 May 2018	16.8 °C3 February 2018	28.8 °C	757 mm	284
2017	42.4 °C18 May 2017	17.7 °C10 February 2017	29.0 °C	1,116 mm	289
2016	41.1 °C22 April 2016	18.0 °C24 December 2016	28.8 °C	925 mm	310
2015	41.9 °C25 May 2015	18.3 °C13 January 2015	28.8 °C	1,128 mm	291
2014	43.2 °C23 May 2014	17.7 °C6 February 2014	28.8 °C	956 mm	276
2013	42.8 °C24 May 2013	17.7 °C16 December 2013	28.4 °C	905 mm	286
2012	42.1 °C19 May 2012	15.1 °C17 January 2012	28.7 °C	711 mm	283
2011	40.9 °C6 May 2011	16.7 °C13 February 2011	28.1 °C	953 mm	268
2010	41.0 °C11 May 2010	18.0 °C9 February 2010	28.2 °C	1,230 mm	266
2009	40.7 °C13 May 2009	16.9 °C11 February 2009	28.6 °C	834 mm	276
2008	41.3 °C5 May 2008	16.4 °C20 January 2008	28.0 °C	1,163 mm	264
2007	41.6 °C14 May 2007	17.3 °C16 November 2007	27.8 °C	1,137 mm	261
2006	41.1 °C28 April 2006	16.7 °C15 February 2006	28.1 °C	812 mm	258
2005	40.3 °C14 May 2005	16.9 °C11 January 2005	28.2 °C	1,300 mm	260
2004	41.0 °C18 April 2004	17.3 °C15 January 2004	28.0 °C	880 mm	259
2003	42.9 °C22 May 2003	17.3 °C31 January 2003	28.4 °C	696 mm	274
2002	41.6 °C11 May 2002	17.1 °C21 December 2002	28.3 °C	563 mm	254
2001	42.0 °C12 May 2001	18.2 °C13 December 2001	28.4 °C	1,173 mm	265
2000	41.4 °C15 May 2000	16.7 °C14 December 2000	27.9 °C	720 mm	266
1999	39.9 °C14 April 1999	17.4 °C27 January 1999	28.2 °C	559 mm	265
1998	42.8 °C2 June 1998	18.1 °C24 December 1998	28.5 °C	848 mm	276
1997	42.0 °C29 May 1997	16.0 °C16 February 1997	28.1 °C	931 mm	268
1996	41.3 °C7 May 1996	16.4 °C2 December 1996	27.8 °C	1,387 mm	254
1995	40.7 °C7 June 1995	17.0 °C23 January 1995	27.8 °C	962 mm	257
1994	41.3 °C10 May 1994	15.8 °C12 December 1994	28.1 °C	761 mm	251
1993	40.6 °C11 May 1993	16.9 °C19 January 1993	28.1 °C	996 mm	251
1992	41.4 °C23 May 1992	14.9 °C7 January 1992	27.9 °C	578 mm	265
1991	41.3 °C29 April 1991	16.8 °C29 January 1991	28.1 °C	869 mm	263
1990	40.8 °C20 April 1990	14.9 °C15 January 1990	28.0 °C	1,025 mm	258
1989	40.7 °C30 April 1989	14.5 °C3 February 1989	27.5 °C	993 mm	248
1988	41.2 °C10 May 1988	16.6 °C29 November 1988	28.0 °C	1,060 mm	252
1987	40.6 °C1 June 1987	17.0 °C12 February 1987	28.1 °C	970 mm	252
1986	41.5 °C18 May 1986	16.8 °C23 February 1986	28.2 °C	927 mm	243
1985	41.1 °C24 May 1985	17.3 °C24 November 1985	27.9 °C	991 mm	259
1984	41.2 °C24 May 1984	16.7 °C12 December 1984	27.9 °C	1,312 mm	227
1983	42.6 °C31 May 1983	16.7 °C9 January 1983	28.3 °C	725 mm	269
1982	40.4 °C28 May 1982	18.0 °C11 January 1982	28.3 °C	453 mm	273
1981	41.7 °C16 May 1981	14.3 °C11 December 1981	27.7 °C	892 mm	254
1980	43.4 °C24 May 1980	17.2 °C1 January 1980	28.2 °C	764 mm	271
1979	40.6 °C4 June 1979	17.6 °C31 December 1979	28.4 °C	722 mm	248
1978	41.6 °C19 May 1978	15.0 °C19 January 1978	28.1 °C	916 mm	253
1977	39.9 °C23 May 1977	15.1 °C13 January 1977	28.0 °C	641 mm	245
1976	42.7 °C5 May 1976	15.9 °C22 February 1976	27.8 °C	895 mm	258
1975	42.6 °C12 May 1975	15.5 °C11 January 1975	28.0 °C	920 mm	258
1974	39.9 °C3 May 1974	16.1 °C4 February 1974	27.7 °C	556 mm	256
1973	42.2 °C10 May 1973	16.0 °C10 December 1973	28.2 °C	775 mm	260
1972	43.3 °C5 June 1972	15.9 °C6 January 1972	28.0 °C	702 mm	248
1971	40.8 °C4 May 1971	16.4 °C21 December 1971	27.6 °C	873 mm	249
1970	41.6 °C4 May 1970	15.7 °C2 December 1970	27.9 °C	755 mm	252
1969	41.3 °C10 June 1969	14.6 °C27 January 1969	28.2 °C	1,096 mm	249
1968	41.1 °C30 May 1968	17.3 °C8 January 1968	27.9 °C	976 mm	245
1967	42.7 °C3 June 1967	15.1 °C7 February 1967	27.7 °C	1,063 mm	243
1966	44.4 °C24 May 1966	15.7 °C14 December 1966	27.5 °C	1,394 mm	230
1965	43.3 °C31 May 1965	15.8 °C14 January 1965	27.6 °C	1,082 mm	256
1964	44.2 °C30 May 1964	16.8 °C15 January 1964	27.8 °C	963 mm	267
1963	42.8 °C27 May 1963	16.4 °C10 February 1963	27.7 °C	818 mm	266
1962	41.0 °C2 May 1962	17.3 °C12 January 1962	27.4 °C	853 mm	231
1961	40.4 °C20 May 1961	17.1 °C27 December 1961	27.6 °C	669 mm	254
1960	42.6 °C25 May 1960	15.8 °C4 February 1960	28.0 °C	828 mm	256
1959	43.1 °C27 May 1959	18.4 °C12 February 1959	28.1 °C	690 mm	266
1958	43.0 °C7 June 1958	17.2 °C18 January 1958	28.4 °C	819 mm	271
1957	41.5 °C6 May 1957	16.2 °C23 January 1957	27.8 °C	674 mm	250
1956	44.4 °C10 May 1956	15.9 °C18 February 1956	27.3 °C	1,200 mm	222
1955	41.7 °C7 June 1955	16.2 °C19 December 1955	27.2 °C	1,275 mm	248
1954	43.2 °C28 May 1954	15.5 °C20 January 1954	27.7 °C	976 mm	259
1953	42.5 °C30 May 1953	17.4 °C22 December 1953	28.2 °C	818 mm	262
1952	43.0 °C19 May 1952	17.1 °C21 January 1952	28.8 °C	501 mm	314
1951	41.5 °C14 May 1951	16.5 °C16 December 1951	28.1 °C	870 mm	289
1950	41.7 °C21 May 1950	16.1 °C2 January 1950	28.1 °C	688 mm	333
1949	40.9 °C25 April 1949	17.8 °C31 December 1949	27.6 °C	850 mm	268
1948	43.1 °C22 May 1948	19.1 °C5 December 1948	28.3 °C	1,009 mm	264
1947	41.8 °C25 May 1947	17.1 °C10 February 1947	28.0 °C	768 mm	246
1946	44.4 °C1 May 1946	14.7 °C25 January 1946	28.0 °C	1,116 mm	261
1945	43.6 °C17 May 1945	15.4 °C7 February 1945	28.0 °C	678 mm	262
1944	41.6 °C30 May 1944	16.8 °C26 January 1944	27.8 °C	1,018 mm	256
1943	41.4 °C30 April 1943	16.5 °C22 February 1943	26.9 °C	1,405 mm	238
1942	38.8 °C19 June 1942	14.3 °C1 January 1942	27.1 °C	764 mm	255
1941	43.5 °C25 April 1941	14.4 °C26 December 1941	27.9 °C	1,140 mm	267
1940	41.8 °C3 June 1940	14.3 °C17 January 1940	27.9 °C	565 mm	288

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

33.1 °C

+0.2 °C

Hot days (≥ 30 °C)

278 d/yr

+14

Frost days (< 0 °C)

0 d/yr

Annual rainfall

892 mm

-30 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.9 °C	+0.5 °C	16 mm	-5 mm
Feb	31.9 °C	+0.9 °C	0 mm	-8 mm
Mar	34.4 °C	+0.5 °C	13 mm	-1 mm
Apr	36.2 °C	-0.1 °C	8 mm	-8 mm
May	36.0 °C	-2.1 °C	105 mm	+63 mm
Jun	37.1 °C	+0.3 °C	47 mm	-19 mm
Jul	36.1 °C	+1.0 °C	72 mm	-16 mm
Aug	33.7 °C	-0.5 °C	132 mm	+24 mm
Sep	33.9 °C	+0.4 °C	52 mm	-66 mm
Oct	31.3 °C	+0.1 °C	213 mm	+48 mm
Nov	29.9 °C	+1.1 °C	151 mm	-29 mm
Dec	28.2 °C	+0.5 °C	84 mm	-11 mm

The year's extremes

Hottest day

39.3 °C

8 Jul 2025

Coldest day

19.4 °C

20 Dec 2025

Wettest day

71.6 mm

30 Nov 2025

Windiest day

31.8 km/h

1 Dec 2025

Strongest gust

56.2 km/h

1 Dec 2025

Hottest feels-like

45.6 °C

4 May 2025

Coldest feels-like

21.7 °C

20 Dec 2025

Sunniest day

12.4 h

5 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 Tiruvallur?

Tiruvallur has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.1 °C and it receives 922 mm of precipitation per year.

What is the hottest day ever recorded in Tiruvallur?

The hottest day measured in Tiruvallur between 1940 and 2025 was 1 May 1946, reaching 44.4 °C.

What is the coldest day in Tiruvallur?

The coldest day measured in Tiruvallur between 1940 and 2025 was 17 January 1940, at 14.3 °C.

Does it snow in Tiruvallur?

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

Has the climate of Tiruvallur warmed?

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

What is the wettest day in Tiruvallur?

The wettest day measured in Tiruvallur between 1940 and 2025 was 4 December 2023, with 246 mm of rain in 24 hours.

What was the windiest day in Tiruvallur?

The windiest day measured in Tiruvallur between 1940 and 2025 was 12 December 2016, with winds reaching 56.3 km/h.

What is the warmest month in Tiruvallur?

The warmest month in Tiruvallur is May (32.1 °C on average); the coldest is January (23.9 °C).

How much does it rain in Tiruvallur?

Tiruvallur receives on average 922 mm of precipitation per year, spread over about 127 rainy days.

Is it sunny in Tiruvallur?

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

Are there tropical nights in Tiruvallur?

Yes: Tiruvallur has on average 334 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Tiruvallur?

In Tiruvallur, between 1940 and 2025, the highest apparent temperature reached 48.9 °C on 16 May 2023, and the lowest was 14.1 °C on 11 December 1981.

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