Koothanallur climate — normals and trends

Q: What is the climate of Koothanallur?

Koothanallur has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.5 °C and it receives 937 mm of precipitation per year.

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

The hottest day measured in Koothanallur between 1940 and 2025 was 13 May 1956, reaching 43.2 °C.

Q: What is the coldest day in Koothanallur?

The coldest day measured in Koothanallur between 1940 and 2025 was 20 January 1990, at 15.1 °C.

Q: Does it snow in Koothanallur?

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

Q: Has the climate of Koothanallur warmed?

Yes: Koothanallur warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Koothanallur?

The wettest day measured in Koothanallur between 1940 and 2025 was 22 December 1983, with 253 mm of rain in 24 hours.

Q: What was the windiest day in Koothanallur?

The windiest day measured in Koothanallur between 1940 and 2025 was 30 December 2011, with winds reaching 34.0 km/h.

Q: What is the warmest month in Koothanallur?

The warmest month in Koothanallur is May (31.5 °C on average); the coldest is January (24.8 °C).

Q: How much does it rain in Koothanallur?

Koothanallur receives on average 937 mm of precipitation per year, spread over about 140 rainy days.

Q: Is it sunny in Koothanallur?

Koothanallur gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.

Koothanallur (India) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 28.5 °C and it receives 937 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 (31.5 °C on average) and the coldest is January (24.8 °C). Rainfall peaks in November.

Koothanallur averages 0 frost days, 279 hot days (≥ 30 °C) and 140 rainy days per year.

Koothanallur has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.

The hottest day of the period reached 43.2 °C (on 13 May 1956) and the coldest 15.1 °C (on 20 January 1990).

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

KoothanallurTamil Nadu

coords: 10.72°, 79.52°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthMayColdest monthJanuaryWettest monthNovemberDriest monthFebruary

Mean daily temperature

28.5°C

Average daily high

33.3°C

Average daily low

25.0°C

Annual rainfall

937mm

Sunshine / day

10.3h

Mean relative humidity

71%

Average peak wind

16.1km/h

Seasonal range

6.7°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

279 d/yr

Rainy days (≥ 1 mm)

140 d/yr

Annual snowfall

0.0 cm

Average feels-like high

37.0 °C

Average feels-like low

28.5 °C

Average peak gust

36.5 km/h

Tropical nights (≥ 20 °C)

354 d/yr

Solar radiation

19.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.3 °C

since 1940

+0.2 °C per decade · r² = 0.62 · 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

43.2 °C

13 May 1956

Coldest day

15.1 °C

20 January 1990

Wettest day

253 mm

22 December 1983

Windiest day

34.0 km/h

30 December 2011

Strongest gust

78.5 km/h

4 December 1993

Hottest feels-like

48.0 °C

2 June 2014

Coldest feels-like

15.7 °C

20 January 1990

Sunniest day

12.5 h

26 May 1953

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	38.8 °C17 July 2025	20.3 °C21 December 2025	29.0 °C	1,084 mm	285
2024	39.3 °C1 May 2024	20.8 °C17 January 2024	29.4 °C	1,359 mm	322
2023	39.2 °C3 August 2023	19.3 °C16 January 2023	29.0 °C	1,366 mm	299
2022	38.3 °C24 May 2022	20.1 °C9 December 2022	28.7 °C	1,193 mm	301
2021	39.4 °C30 May 2021	20.0 °C11 February 2021	28.9 °C	1,504 mm	299
2020	39.6 °C9 June 2020	20.5 °C16 February 2020	29.1 °C	1,178 mm	313
2019	40.7 °C22 June 2019	19.5 °C22 January 2019	29.3 °C	848 mm	299
2018	38.7 °C21 June 2018	19.4 °C3 February 2018	28.9 °C	820 mm	303
2017	39.9 °C5 June 2017	19.4 °C8 February 2017	29.1 °C	1,214 mm	298
2016	39.5 °C12 July 2016	19.7 °C24 December 2016	29.4 °C	627 mm	326
2015	40.4 °C6 July 2015	19.8 °C15 January 2015	29.0 °C	1,436 mm	288
2014	41.9 °C7 June 2014	19.7 °C6 February 2014	29.4 °C	1,199 mm	281
2013	41.4 °C9 May 2013	20.1 °C14 January 2013	29.2 °C	652 mm	306
2012	41.0 °C3 June 2012	18.2 °C18 January 2012	29.1 °C	754 mm	297
2011	40.0 °C31 May 2011	18.3 °C28 December 2011	28.7 °C	1,087 mm	271
2010	41.2 °C27 May 2010	19.0 °C4 March 2010	28.9 °C	1,402 mm	284
2009	40.0 °C11 May 2009	18.2 °C12 February 2009	29.0 °C	1,083 mm	267
2008	39.8 °C6 June 2008	18.6 °C20 January 2008	28.6 °C	1,361 mm	289
2007	40.7 °C14 May 2007	18.3 °C26 December 2007	28.6 °C	1,182 mm	273
2006	39.4 °C6 July 2006	17.2 °C20 January 2006	28.7 °C	960 mm	268
2005	40.1 °C16 June 2005	18.8 °C14 February 2005	28.8 °C	1,222 mm	280
2004	40.7 °C18 April 2004	18.0 °C1 March 2004	28.5 °C	1,154 mm	268
2003	40.6 °C22 May 2003	19.0 °C25 January 2003	29.1 °C	833 mm	288
2002	40.4 °C13 May 2002	18.4 °C15 January 2002	28.7 °C	749 mm	272
2001	40.3 °C15 May 2001	18.0 °C11 February 2001	28.8 °C	879 mm	278
2000	40.0 °C22 May 2000	17.4 °C21 January 2000	28.4 °C	865 mm	273
1999	39.6 °C14 April 1999	17.1 °C27 January 1999	28.5 °C	853 mm	274
1998	40.7 °C29 May 1998	19.7 °C17 January 1998	29.0 °C	961 mm	302
1997	40.4 °C29 May 1997	17.2 °C17 February 1997	28.7 °C	966 mm	283
1996	39.8 °C13 May 1996	18.0 °C3 December 1996	28.4 °C	1,237 mm	291
1995	39.7 °C14 June 1995	19.4 °C14 February 1995	28.7 °C	766 mm	278
1994	39.5 °C24 May 1994	18.7 °C30 January 1994	28.4 °C	844 mm	248
1993	40.5 °C30 May 1993	17.9 °C20 January 1993	28.6 °C	1,052 mm	265
1992	39.9 °C6 April 1992	18.1 °C10 March 1992	28.4 °C	666 mm	281
1991	41.2 °C29 April 1991	18.2 °C12 February 1991	28.7 °C	845 mm	279
1990	40.0 °C17 May 1990	15.1 °C20 January 1990	28.8 °C	900 mm	283
1989	41.6 °C28 May 1989	16.4 °C8 February 1989	28.4 °C	863 mm	280
1988	40.9 °C27 May 1988	18.6 °C8 February 1988	28.7 °C	859 mm	291
1987	41.0 °C4 June 1987	19.4 °C12 February 1987	29.0 °C	722 mm	288
1986	41.5 °C21 May 1986	17.7 °C17 November 1986	28.7 °C	784 mm	263
1985	41.1 °C23 April 1985	18.7 °C6 February 1985	28.6 °C	776 mm	273
1984	39.8 °C2 June 1984	16.8 °C14 December 1984	28.0 °C	1,273 mm	244
1983	41.8 °C31 May 1983	18.1 °C3 January 1983	28.8 °C	1,027 mm	291
1982	40.6 °C4 April 1982	19.0 °C12 January 1982	28.6 °C	602 mm	274
1981	40.3 °C27 May 1981	17.6 °C1 February 1981	28.3 °C	800 mm	276
1980	42.3 °C25 May 1980	17.4 °C28 January 1980	28.8 °C	625 mm	281
1979	40.0 °C4 June 1979	19.5 °C30 January 1979	28.6 °C	793 mm	261
1978	41.2 °C18 May 1978	16.5 °C19 January 1978	28.7 °C	888 mm	287
1977	39.1 °C27 June 1977	17.0 °C13 January 1977	28.2 °C	774 mm	255
1976	41.0 °C24 May 1976	16.6 °C26 February 1976	28.2 °C	691 mm	264
1975	41.3 °C4 May 1975	18.9 °C9 January 1975	28.3 °C	939 mm	282
1974	39.4 °C30 April 1974	16.7 °C8 February 1974	28.3 °C	474 mm	285
1973	42.2 °C10 May 1973	19.0 °C22 January 1973	28.5 °C	851 mm	276
1972	40.3 °C5 June 1972	18.2 °C6 February 1972	28.1 °C	1,036 mm	268
1971	39.7 °C3 May 1971	18.0 °C12 February 1971	27.9 °C	946 mm	261
1970	39.9 °C7 May 1970	18.4 °C4 December 1970	28.4 °C	750 mm	268
1969	40.6 °C11 May 1969	17.1 °C27 January 1969	28.8 °C	1,073 mm	267
1968	39.2 °C21 May 1968	17.8 °C7 February 1968	28.3 °C	787 mm	273
1967	40.2 °C7 May 1967	17.7 °C10 February 1967	28.1 °C	1,140 mm	263
1966	42.2 °C24 May 1966	18.6 °C14 December 1966	27.9 °C	1,139 mm	247
1965	40.6 °C31 May 1965	18.6 °C8 March 1965	27.9 °C	1,250 mm	264
1964	42.3 °C27 May 1964	17.1 °C15 January 1964	28.2 °C	849 mm	271
1963	42.2 °C27 May 1963	17.6 °C13 February 1963	27.9 °C	1,195 mm	243
1962	39.4 °C29 May 1962	18.8 °C11 January 1962	28.0 °C	883 mm	248
1961	39.1 °C12 May 1961	18.0 °C26 February 1961	27.8 °C	711 mm	258
1960	40.3 °C14 June 1960	17.1 °C4 February 1960	28.1 °C	873 mm	256
1959	40.5 °C23 May 1959	19.3 °C12 February 1959	28.5 °C	759 mm	280
1958	40.3 °C4 June 1958	18.8 °C5 February 1958	28.4 °C	1,011 mm	266
1957	40.2 °C8 May 1957	18.0 °C8 February 1957	28.1 °C	840 mm	258
1956	43.2 °C13 May 1956	16.8 °C21 January 1956	27.7 °C	965 mm	247
1955	39.4 °C6 June 1955	17.5 °C30 December 1955	27.6 °C	1,035 mm	260
1954	40.7 °C27 May 1954	16.3 °C20 January 1954	27.8 °C	1,095 mm	262
1953	41.4 °C3 June 1953	19.4 °C31 January 1953	28.5 °C	666 mm	310
1952	42.5 °C20 May 1952	19.2 °C21 January 1952	28.9 °C	455 mm	350
1951	40.5 °C10 May 1951	18.7 °C4 January 1951	28.4 °C	794 mm	319
1950	41.2 °C18 May 1950	18.5 °C3 January 1950	28.8 °C	347 mm	350
1949	39.3 °C25 April 1949	19.5 °C26 January 1949	27.8 °C	703 mm	287
1948	40.0 °C1 June 1948	20.0 °C27 February 1948	28.4 °C	1,012 mm	272
1947	40.4 °C3 June 1947	18.2 °C9 February 1947	28.0 °C	814 mm	263
1946	41.5 °C12 May 1946	16.6 °C29 January 1946	28.2 °C	1,061 mm	263
1945	41.1 °C23 May 1945	17.2 °C4 January 1945	28.3 °C	668 mm	275
1944	39.5 °C18 May 1944	18.2 °C6 February 1944	27.9 °C	1,103 mm	266
1943	40.8 °C30 April 1943	18.3 °C22 February 1943	27.3 °C	909 mm	266
1942	38.7 °C8 August 1942	17.7 °C1 January 1942	27.4 °C	838 mm	258
1941	41.5 °C29 April 1941	16.1 °C29 December 1941	27.8 °C	1,156 mm	260
1940	38.5 °C3 April 1940	17.2 °C9 January 1940	27.6 °C	874 mm	277

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

33.3 °C

0.0 °C

Hot days (≥ 30 °C)

285 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1084 mm

+147 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	29.1 °C	+0.4 °C	48 mm	+12 mm
Feb	31.5 °C	+0.6 °C	12 mm	-6 mm
Mar	33.2 °C	-0.4 °C	40 mm	+17 mm
Apr	35.3 °C	-0.4 °C	41 mm	+7 mm
May	35.9 °C	-1.3 °C	120 mm	+70 mm
Jun	36.4 °C	-0.4 °C	28 mm	-18 mm
Jul	37.0 °C	+0.9 °C	31 mm	-26 mm
Aug	35.3 °C	-0.4 °C	83 mm	+10 mm
Sep	35.1 °C	+0.1 °C	87 mm	-14 mm
Oct	32.1 °C	-0.1 °C	208 mm	+31 mm
Nov	30.1 °C	+0.6 °C	345 mm	+148 mm
Dec	28.9 °C	+0.6 °C	43 mm	-84 mm

The year's extremes

Hottest day

38.8 °C

17 Jul 2025

Coldest day

20.3 °C

21 Dec 2025

Wettest day

156.9 mm

29 Nov 2025

Windiest day

28.0 km/h

28 May 2025

Strongest gust

64.4 km/h

28 May 2025

Hottest feels-like

46.4 °C

4 May 2025

Coldest feels-like

21.8 °C

15 Dec 2025

Sunniest day

12.3 h

1 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 Koothanallur?

Koothanallur has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 28.5 °C and it receives 937 mm of precipitation per year.

What is the hottest day ever recorded in Koothanallur?

The hottest day measured in Koothanallur between 1940 and 2025 was 13 May 1956, reaching 43.2 °C.

What is the coldest day in Koothanallur?

The coldest day measured in Koothanallur between 1940 and 2025 was 20 January 1990, at 15.1 °C.

Does it snow in Koothanallur?

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

Has the climate of Koothanallur warmed?

Yes: Koothanallur warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Koothanallur?

The wettest day measured in Koothanallur between 1940 and 2025 was 22 December 1983, with 253 mm of rain in 24 hours.

What was the windiest day in Koothanallur?

The windiest day measured in Koothanallur between 1940 and 2025 was 30 December 2011, with winds reaching 34.0 km/h.

What is the warmest month in Koothanallur?

The warmest month in Koothanallur is May (31.5 °C on average); the coldest is January (24.8 °C).

How much does it rain in Koothanallur?

Koothanallur receives on average 937 mm of precipitation per year, spread over about 140 rainy days.

Is it sunny in Koothanallur?

Koothanallur gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.

Are there tropical nights in Koothanallur?

Yes: Koothanallur has on average 354 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Koothanallur?

In Koothanallur, between 1940 and 2025, the highest apparent temperature reached 48.0 °C on 2 June 2014, and the lowest was 15.7 °C on 20 January 1990.

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