Siraha climate — normals and trends

Q: What is the climate of Siraha?

Siraha has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 24.5 °C and it receives 1,306 mm of precipitation per year.

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

The hottest day measured in Siraha between 1940 and 2025 was 26 May 1957, reaching 45.8 °C.

Q: What is the coldest day in Siraha?

The coldest day measured in Siraha between 1940 and 2025 was 28 January 1964, at 3.9 °C.

Q: Does it snow in Siraha?

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

Q: Has the climate of Siraha warmed?

Yes: Siraha warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Siraha?

The wettest day measured in Siraha between 1940 and 2025 was 12 August 1987, with 389 mm of rain in 24 hours.

Q: What was the windiest day in Siraha?

The windiest day measured in Siraha between 1940 and 2025 was 12 August 1987, with winds reaching 42.5 km/h.

Q: What is the warmest month in Siraha?

The warmest month in Siraha is May (30.0 °C on average); the coldest is January (15.8 °C).

Q: How much does it rain in Siraha?

Siraha receives on average 1,306 mm of precipitation per year, spread over about 129 rainy days.

Q: Is it sunny in Siraha?

Siraha gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

Siraha (Nepal) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 24.5 °C and it receives 1,306 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 (30.0 °C on average) and the coldest is January (15.8 °C). Rainfall peaks in July.

Siraha averages 0 frost days, 189 hot days (≥ 30 °C) and 129 rainy days per year.

Siraha has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.

The hottest day of the period reached 45.8 °C (on 26 May 1957) and the coldest 3.9 °C (on 28 January 1964).

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

SirahaMadhesh

coords: 26.65°, 86.21°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthMayColdest monthJanuaryWettest monthJulyDriest monthDecember

Mean daily temperature

24.5°C

Average daily high

29.9°C

Average daily low

19.8°C

Annual rainfall

1,306mm

Sunshine / day

10.0h

Mean relative humidity

69%

Average peak wind

12.9km/h

Seasonal range

14.2°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

189 d/yr

Rainy days (≥ 1 mm)

129 d/yr

Annual snowfall

0.0 cm

Average feels-like high

32.5 °C

Average feels-like low

21.6 °C

Average peak gust

29.4 km/h

Tropical nights (≥ 20 °C)

205 d/yr

Solar radiation

17.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.6 °C

since 1940

+0.2 °C per decade · r² = 0.52 · 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

45.8 °C

26 May 1957

Coldest day

3.9 °C

28 January 1964

Wettest day

389 mm

12 August 1987

Windiest day

42.5 km/h

12 August 1987

Strongest gust

91.1 km/h

12 August 1987

Hottest feels-like

47.9 °C

12 August 2019

Coldest feels-like

0.6 °C

5 February 1964

Sunniest day

13.1 h

4 June 2023

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	40.6 °C13 July 2025	8.7 °C3 January 2025	25.3 °C	1,380 mm	221
2024	41.9 °C30 April 2024	6.6 °C29 January 2024	25.6 °C	1,097 mm	225
2023	42.5 °C8 June 2023	6.4 °C9 January 2023	25.7 °C	1,115 mm	244
2022	40.9 °C25 April 2022	8.3 °C31 January 2022	25.3 °C	977 mm	242
2021	39.2 °C26 April 2021	6.2 °C31 January 2021	24.7 °C	1,430 mm	217
2020	37.9 °C7 April 2020	7.2 °C22 December 2020	24.5 °C	1,679 mm	218
2019	41.2 °C11 May 2019	4.8 °C30 December 2019	25.2 °C	1,490 mm	219
2018	40.0 °C9 May 2018	6.8 °C7 January 2018	25.1 °C	849 mm	250
2017	40.5 °C27 April 2017	6.2 °C14 January 2017	25.2 °C	1,135 mm	223
2016	42.4 °C10 April 2016	8.1 °C23 January 2016	25.3 °C	1,285 mm	241
2015	42.2 °C7 June 2015	6.1 °C27 December 2015	25.2 °C	896 mm	224
2014	42.1 °C21 May 2014	7.7 °C29 December 2014	24.7 °C	1,169 mm	208
2013	40.8 °C12 April 2013	4.5 °C11 January 2013	24.8 °C	1,217 mm	209
2012	42.3 °C23 May 2012	6.4 °C15 January 2012	24.9 °C	1,313 mm	223
2011	38.8 °C21 April 2011	5.8 °C12 January 2011	24.5 °C	1,510 mm	216
2010	42.1 °C12 May 2010	7.5 °C3 January 2010	25.4 °C	1,838 mm	229
2009	42.5 °C9 May 2009	8.5 °C4 January 2009	25.5 °C	1,419 mm	234
2008	42.4 °C28 April 2008	6.9 °C2 February 2008	25.0 °C	1,349 mm	216
2007	43.4 °C1 June 2007	7.3 °C16 January 2007	24.9 °C	1,766 mm	188
2006	41.9 °C1 May 2006	6.8 °C25 January 2006	25.4 °C	1,223 mm	236
2005	44.3 °C1 June 2005	8.2 °C3 February 2005	25.3 °C	1,244 mm	222
2004	43.8 °C15 May 2004	7.5 °C28 December 2004	24.5 °C	1,247 mm	204
2003	41.7 °C28 May 2003	6.2 °C16 January 2003	24.4 °C	1,349 mm	190
2002	41.0 °C19 April 2002	8.3 °C3 January 2002	24.7 °C	1,156 mm	207
2001	40.7 °C11 April 2001	6.7 °C11 January 2001	24.7 °C	1,376 mm	222
2000	40.2 °C12 May 2000	6.3 °C17 January 2000	24.3 °C	1,776 mm	209
1999	41.7 °C26 April 1999	6.5 °C12 January 1999	25.0 °C	1,843 mm	196
1998	43.2 °C8 June 1998	7.8 °C28 December 1998	25.1 °C	1,496 mm	202
1997	43.3 °C15 May 1997	5.2 °C14 January 1997	24.2 °C	1,048 mm	195
1996	42.3 °C10 May 1996	7.9 °C30 January 1996	25.2 °C	1,118 mm	213
1995	44.5 °C25 May 1995	5.8 °C14 January 1995	25.4 °C	1,577 mm	228
1994	43.5 °C5 May 1994	7.6 °C18 January 1994	25.5 °C	702 mm	245
1993	39.5 °C7 April 1993	6.0 °C21 January 1993	24.5 °C	1,234 mm	195
1992	42.5 °C14 April 1992	6.3 °C3 January 1992	25.0 °C	733 mm	239
1991	41.7 °C10 May 1991	5.9 °C16 January 1991	24.5 °C	966 mm	217
1990	39.9 °C16 April 1990	6.0 °C7 January 1990	24.3 °C	1,206 mm	177
1989	45.3 °C6 May 1989	6.0 °C12 January 1989	24.3 °C	1,188 mm	195
1988	42.7 °C10 May 1988	5.6 °C26 January 1988	25.0 °C	1,722 mm	220
1987	43.2 °C16 May 1987	8.1 °C2 January 1987	25.1 °C	1,993 mm	191
1986	42.1 °C30 March 1986	6.6 °C29 December 1986	24.4 °C	1,269 mm	175
1985	42.1 °C25 April 1985	6.7 °C15 January 1985	24.7 °C	1,151 mm	187
1984	41.0 °C4 April 1984	6.2 °C28 January 1984	24.2 °C	1,265 mm	195
1983	42.6 °C20 June 1983	6.2 °C11 January 1983	24.5 °C	1,089 mm	222
1982	42.6 °C8 May 1982	8.2 °C2 January 1982	24.7 °C	1,121 mm	210
1981	42.1 °C13 June 1981	5.3 °C20 December 1981	24.2 °C	1,144 mm	192
1980	42.6 °C25 April 1980	6.5 °C13 January 1980	25.1 °C	795 mm	239
1979	43.7 °C6 June 1979	8.0 °C3 January 1979	25.3 °C	1,011 mm	187
1978	39.6 °C10 April 1978	5.1 °C9 January 1978	24.5 °C	983 mm	209
1977	43.5 °C31 May 1977	6.6 °C30 January 1977	24.7 °C	858 mm	211
1976	40.2 °C4 May 1976	6.3 °C11 January 1976	24.5 °C	1,223 mm	213
1975	41.7 °C18 May 1975	5.5 °C8 January 1975	24.5 °C	1,293 mm	187
1974	40.5 °C3 June 1974	5.5 °C7 February 1974	24.4 °C	1,504 mm	184
1973	43.6 °C15 April 1973	7.6 °C25 December 1973	24.8 °C	1,916 mm	176
1972	43.2 °C11 June 1972	7.7 °C19 February 1972	24.9 °C	1,084 mm	194
1971	36.3 °C26 March 1971	6.4 °C30 January 1971	23.5 °C	1,535 mm	117
1970	40.1 °C11 May 1970	7.6 °C28 December 1970	24.2 °C	1,186 mm	183
1969	41.0 °C18 May 1969	7.0 °C30 January 1969	24.2 °C	960 mm	183
1968	42.0 °C25 May 1968	6.9 °C2 February 1968	23.9 °C	1,600 mm	158
1967	41.3 °C27 May 1967	5.4 °C3 January 1967	24.0 °C	1,409 mm	171
1966	42.9 °C11 June 1966	7.8 °C19 January 1966	24.3 °C	1,325 mm	148
1965	41.5 °C6 June 1965	7.1 °C7 January 1965	24.1 °C	1,437 mm	142
1964	45.2 °C7 June 1964	3.9 °C28 January 1964	24.8 °C	1,273 mm	172
1963	41.4 °C17 May 1963	6.3 °C4 January 1963	24.3 °C	1,758 mm	180
1962	38.1 °C13 April 1962	6.2 °C18 January 1962	23.9 °C	1,497 mm	162
1961	43.9 °C20 May 1961	5.5 °C26 December 1961	24.2 °C	1,205 mm	176
1960	44.2 °C5 May 1960	7.8 °C26 January 1960	25.0 °C	1,198 mm	185
1959	42.4 °C20 May 1959	7.5 °C30 December 1959	24.4 °C	1,220 mm	167
1958	43.9 °C25 May 1958	8.4 °C19 January 1958	25.1 °C	1,677 mm	179
1957	45.8 °C26 May 1957	7.6 °C13 February 1957	25.0 °C	1,339 mm	190
1956	41.8 °C19 April 1956	6.9 °C18 December 1956	24.1 °C	1,615 mm	163
1955	41.1 °C15 May 1955	5.6 °C2 January 1955	24.3 °C	1,572 mm	158
1954	41.9 °C14 May 1954	6.5 °C31 December 1954	24.1 °C	1,562 mm	135
1953	33.2 °C31 July 1953	5.8 °C4 January 1953	22.7 °C	1,297 mm	84
1952	35.5 °C15 April 1952	7.8 °C29 December 1952	22.6 °C	1,983 mm	83
1951	39.2 °C19 May 1951	7.8 °C26 January 1951	23.2 °C	1,631 mm	123
1950	39.9 °C22 April 1950	5.2 °C12 February 1950	23.4 °C	1,771 mm	108
1949	33.3 °C16 June 1949	7.8 °C1 January 1949	22.7 °C	1,589 mm	72
1948	39.0 °C12 April 1948	6.9 °C17 January 1948	23.9 °C	1,235 mm	168
1947	41.1 °C18 May 1947	7.6 °C15 January 1947	24.3 °C	1,045 mm	160
1946	38.6 °C21 May 1946	6.9 °C2 January 1946	24.0 °C	1,146 mm	177
1945	39.5 °C3 April 1945	5.1 °C8 January 1945	23.7 °C	1,132 mm	173
1944	41.0 °C15 May 1944	7.1 °C19 January 1944	24.0 °C	892 mm	162
1943	36.1 °C6 April 1943	7.7 °C8 February 1943	23.0 °C	1,011 mm	104
1942	39.2 °C22 April 1942	7.6 °C7 January 1942	23.8 °C	1,330 mm	134
1941	37.7 °C25 May 1941	7.7 °C14 January 1941	23.7 °C	1,094 mm	151
1940	39.1 °C16 April 1940	7.4 °C5 January 1940	23.7 °C	923 mm	144

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

30.5 °C

+0.6 °C

Hot days (≥ 30 °C)

221 d/yr

+32

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1380 mm

+74 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	22.2 °C	-0.5 °C	1 mm	-13 mm
Feb	26.2 °C	+0.1 °C	2 mm	-11 mm
Mar	32.0 °C	+0.1 °C	6 mm	-8 mm
Apr	33.8 °C	-1.8 °C	103 mm	+74 mm
May	35.0 °C	-0.5 °C	54 mm	-13 mm
Jun	35.2 °C	+1.9 °C	130 mm	-95 mm
Jul	34.7 °C	+3.8 °C	136 mm	-247 mm
Aug	32.1 °C	+1.2 °C	449 mm	+166 mm
Sep	32.5 °C	+1.9 °C	176 mm	-29 mm
Oct	30.7 °C	+0.9 °C	322 mm	+259 mm
Nov	28.3 °C	+0.8 °C	1 mm	-5 mm
Dec	22.8 °C	-1.4 °C	0 mm	-4 mm

The year's extremes

Hottest day

40.6 °C

13 Jul 2025

Coldest day

8.7 °C

3 Jan 2025

Wettest day

119.7 mm

4 Oct 2025

Windiest day

32.7 km/h

26 Jul 2025

Strongest gust

60.8 km/h

17 Mar 2025

Hottest feels-like

46.2 °C

24 Jul 2025

Coldest feels-like

7.7 °C

3 Jan 2025

Sunniest day

13.0 h

2 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 Siraha?

Siraha has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 24.5 °C and it receives 1,306 mm of precipitation per year.

What is the hottest day ever recorded in Siraha?

The hottest day measured in Siraha between 1940 and 2025 was 26 May 1957, reaching 45.8 °C.

What is the coldest day in Siraha?

The coldest day measured in Siraha between 1940 and 2025 was 28 January 1964, at 3.9 °C.

Does it snow in Siraha?

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

Has the climate of Siraha warmed?

Yes: Siraha warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Siraha?

The wettest day measured in Siraha between 1940 and 2025 was 12 August 1987, with 389 mm of rain in 24 hours.

What was the windiest day in Siraha?

The windiest day measured in Siraha between 1940 and 2025 was 12 August 1987, with winds reaching 42.5 km/h.

What is the warmest month in Siraha?

The warmest month in Siraha is May (30.0 °C on average); the coldest is January (15.8 °C).

How much does it rain in Siraha?

Siraha receives on average 1,306 mm of precipitation per year, spread over about 129 rainy days.

Is it sunny in Siraha?

Siraha gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

Are there tropical nights in Siraha?

Yes: Siraha has on average 205 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Siraha?

In Siraha, between 1940 and 2025, the highest apparent temperature reached 47.9 °C on 12 August 2019, and the lowest was 0.6 °C on 5 February 1964.

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