Lahān climate — normals and trends

Q: What is the climate of Lahān?

Lahān has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.8 °C and it receives 1,412 mm of precipitation per year.

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

The hottest day measured in Lahān between 1940 and 2025 was 26 May 1957, reaching 44.9 °C.

Q: What is the coldest day in Lahān?

The coldest day measured in Lahān between 1940 and 2025 was 28 January 1964, at 3.2 °C.

Q: Does it snow in Lahān?

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

Q: Has the climate of Lahān warmed?

Yes: Lahān warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Lahān?

The wettest day measured in Lahān between 1940 and 2025 was 12 August 1987, with 428 mm of rain in 24 hours.

Q: What was the windiest day in Lahān?

The windiest day measured in Lahān between 1940 and 2025 was 14 April 1992, with winds reaching 35.6 km/h.

Q: What is the warmest month in Lahān?

The warmest month in Lahān is May (28.9 °C on average); the coldest is January (15.4 °C).

Q: How much does it rain in Lahān?

Lahān receives on average 1,412 mm of precipitation per year, spread over about 140 rainy days.

Q: Is it sunny in Lahān?

Lahān gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Lahān (Nepal) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 23.8 °C and it receives 1,412 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 (28.9 °C on average) and the coldest is January (15.4 °C). Rainfall peaks in July.

Lahān averages 0 frost days, 160 hot days (≥ 30 °C) and 140 rainy days per year.

Lahān has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.

The hottest day of the period reached 44.9 °C (on 26 May 1957) and the coldest 3.2 °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

LahānMadhesh

coords: 26.72°, 86.48°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthMayColdest monthJanuaryWettest monthJulyDriest monthDecember

Mean daily temperature

23.8°C

Average daily high

29.0°C

Average daily low

19.2°C

Annual rainfall

1,412mm

Sunshine / day

9.9h

Mean relative humidity

70%

Average peak wind

11.6km/h

Seasonal range

13.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

160 d/yr

Rainy days (≥ 1 mm)

140 d/yr

Annual snowfall

0.0 cm

Average feels-like high

31.6 °C

Average feels-like low

20.9 °C

Average peak gust

30.3 km/h

Tropical nights (≥ 20 °C)

196 d/yr

Solar radiation

16.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.58 · 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

44.9 °C

26 May 1957

Coldest day

3.2 °C

28 January 1964

Wettest day

428 mm

12 August 1987

Windiest day

35.6 km/h

14 April 1992

Strongest gust

87.1 km/h

12 August 1987

Hottest feels-like

46.8 °C

12 August 2019

Coldest feels-like

0.3 °C

28 January 1964

Sunniest day

13.2 h

5 June 1944

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.4 °C13 July 2025	8.4 °C9 January 2025	24.7 °C	1,436 mm	206
2024	40.9 °C30 April 2024	6.7 °C28 January 2024	24.9 °C	1,224 mm	210
2023	41.4 °C8 June 2023	6.7 °C9 January 2023	25.1 °C	1,184 mm	216
2022	39.8 °C17 April 2022	8.1 °C31 January 2022	24.7 °C	1,037 mm	227
2021	38.4 °C26 April 2021	5.7 °C31 January 2021	24.2 °C	1,515 mm	190
2020	36.9 °C7 April 2020	7.2 °C19 December 2020	23.9 °C	1,873 mm	189
2019	40.4 °C11 May 2019	4.8 °C30 December 2019	24.4 °C	1,620 mm	200
2018	39.2 °C10 June 2018	6.3 °C28 December 2018	24.3 °C	1,023 mm	215
2017	39.2 °C27 April 2017	5.8 °C14 January 2017	24.4 °C	1,370 mm	194
2016	41.7 °C10 April 2016	8.0 °C18 January 2016	24.7 °C	1,411 mm	210
2015	39.8 °C7 June 2015	6.0 °C27 December 2015	24.5 °C	964 mm	197
2014	41.1 °C13 May 2014	7.4 °C13 February 2014	24.2 °C	1,244 mm	190
2013	40.1 °C12 April 2013	4.2 °C11 January 2013	24.2 °C	1,312 mm	186
2012	41.5 °C23 May 2012	5.8 °C15 January 2012	24.2 °C	1,394 mm	205
2011	38.1 °C21 April 2011	5.4 °C12 January 2011	23.8 °C	1,725 mm	191
2010	41.3 °C12 May 2010	7.3 °C3 January 2010	24.8 °C	1,821 mm	207
2009	41.5 °C9 May 2009	8.1 °C4 January 2009	24.8 °C	1,414 mm	208
2008	41.5 °C28 April 2008	6.6 °C2 February 2008	24.3 °C	1,551 mm	185
2007	42.0 °C1 June 2007	7.2 °C14 January 2007	24.3 °C	1,771 mm	172
2006	41.0 °C12 April 2006	6.5 °C9 January 2006	24.7 °C	1,377 mm	208
2005	43.4 °C1 June 2005	8.4 °C30 December 2005	24.6 °C	1,471 mm	196
2004	42.4 °C15 May 2004	7.4 °C5 January 2004	23.8 °C	1,404 mm	167
2003	40.1 °C27 May 2003	6.3 °C16 January 2003	23.9 °C	1,445 mm	165
2002	39.6 °C19 April 2002	8.1 °C1 January 2002	24.1 °C	1,338 mm	177
2001	39.8 °C7 April 2001	6.3 °C11 January 2001	24.1 °C	1,395 mm	191
2000	38.9 °C12 May 2000	6.1 °C17 January 2000	23.6 °C	1,726 mm	162
1999	40.3 °C26 April 1999	6.2 °C12 January 1999	24.4 °C	1,788 mm	174
1998	41.6 °C8 June 1998	7.7 °C28 December 1998	24.4 °C	1,600 mm	167
1997	42.3 °C15 May 1997	4.9 °C14 January 1997	23.6 °C	1,075 mm	164
1996	41.0 °C21 April 1996	7.9 °C17 December 1996	24.5 °C	1,198 mm	184
1995	43.0 °C25 May 1995	5.0 °C14 January 1995	24.6 °C	1,767 mm	192
1994	42.5 °C5 May 1994	7.1 °C17 January 1994	24.7 °C	825 mm	224
1993	38.6 °C7 April 1993	6.9 °C23 January 1993	23.7 °C	1,452 mm	156
1992	41.9 °C14 April 1992	5.7 °C8 February 1992	24.2 °C	844 mm	193
1991	40.8 °C10 May 1991	5.5 °C16 January 1991	23.9 °C	1,076 mm	182
1990	39.0 °C16 April 1990	6.0 °C1 January 1990	23.7 °C	1,295 mm	151
1989	44.1 °C6 May 1989	6.0 °C12 January 1989	23.7 °C	1,378 mm	166
1988	41.3 °C10 May 1988	5.1 °C26 January 1988	24.3 °C	1,967 mm	180
1987	42.5 °C16 May 1987	7.8 °C2 January 1987	24.4 °C	2,017 mm	164
1986	41.4 °C30 March 1986	6.0 °C29 December 1986	23.8 °C	1,261 mm	156
1985	41.0 °C25 April 1985	6.5 °C15 January 1985	24.0 °C	1,248 mm	169
1984	40.2 °C4 April 1984	5.9 °C28 January 1984	23.6 °C	1,405 mm	150
1983	40.4 °C20 June 1983	5.3 °C3 February 1983	23.7 °C	1,202 mm	193
1982	41.6 °C8 May 1982	7.7 °C2 January 1982	24.0 °C	1,164 mm	184
1981	41.0 °C13 June 1981	5.3 °C20 December 1981	23.5 °C	1,238 mm	157
1980	41.4 °C25 April 1980	5.9 °C13 January 1980	24.2 °C	869 mm	187
1979	42.1 °C6 June 1979	7.4 °C3 January 1979	24.5 °C	1,205 mm	160
1978	38.4 °C10 April 1978	4.4 °C9 January 1978	23.8 °C	983 mm	185
1977	42.2 °C31 May 1977	5.5 °C1 February 1977	23.9 °C	994 mm	187
1976	39.1 °C17 April 1976	5.5 °C19 January 1976	23.8 °C	1,322 mm	168
1975	40.2 °C30 April 1975	5.3 °C8 January 1975	23.8 °C	1,419 mm	158
1974	39.1 °C20 April 1974	5.3 °C7 February 1974	23.6 °C	1,634 mm	150
1973	42.9 °C15 April 1973	7.1 °C25 December 1973	24.1 °C	2,008 mm	153
1972	41.8 °C11 June 1972	7.2 °C18 February 1972	24.2 °C	1,272 mm	166
1971	35.6 °C26 March 1971	6.1 °C1 February 1971	22.9 °C	1,622 mm	80
1970	38.9 °C11 May 1970	8.0 °C3 February 1970	23.6 °C	1,147 mm	154
1969	39.9 °C18 May 1969	6.0 °C30 January 1969	23.5 °C	1,035 mm	145
1968	41.0 °C25 May 1968	6.5 °C29 December 1968	23.2 °C	1,780 mm	128
1967	40.2 °C27 May 1967	4.9 °C3 January 1967	23.3 °C	1,510 mm	134
1966	41.6 °C1 May 1966	7.6 °C17 January 1966	23.5 °C	1,607 mm	126
1965	39.8 °C6 June 1965	6.3 °C8 January 1965	23.3 °C	1,606 mm	117
1964	44.2 °C7 June 1964	3.2 °C28 January 1964	24.0 °C	1,343 mm	154
1963	40.1 °C18 May 1963	5.9 °C20 January 1963	23.6 °C	1,666 mm	141
1962	37.2 °C13 April 1962	5.9 °C18 January 1962	23.2 °C	1,698 mm	133
1961	42.9 °C20 May 1961	4.9 °C26 December 1961	23.6 °C	1,395 mm	150
1960	43.2 °C5 May 1960	7.4 °C26 January 1960	24.3 °C	1,376 mm	146
1959	41.4 °C20 May 1959	7.2 °C30 December 1959	23.7 °C	1,406 mm	133
1958	42.6 °C25 May 1958	7.9 °C10 February 1958	24.3 °C	1,771 mm	151
1957	44.9 °C26 May 1957	6.8 °C13 February 1957	24.3 °C	1,520 mm	167
1956	40.7 °C19 April 1956	6.8 °C18 December 1956	23.4 °C	1,716 mm	134
1955	40.1 °C15 May 1955	5.1 °C2 January 1955	23.5 °C	1,648 mm	132
1954	40.6 °C14 May 1954	6.2 °C31 December 1954	23.4 °C	1,758 mm	118
1953	32.6 °C31 July 1953	5.2 °C4 January 1953	22.1 °C	1,415 mm	51
1952	34.4 °C15 April 1952	7.3 °C29 December 1952	22.1 °C	2,014 mm	60
1951	37.8 °C19 May 1951	7.3 °C26 January 1951	22.6 °C	1,773 mm	83
1950	38.8 °C22 April 1950	4.9 °C12 February 1950	22.7 °C	1,987 mm	88
1949	31.9 °C16 June 1949	6.1 °C8 February 1949	22.1 °C	1,727 mm	39
1948	37.9 °C12 April 1948	7.0 °C17 January 1948	23.2 °C	1,238 mm	131
1947	39.9 °C18 May 1947	7.4 °C15 January 1947	23.6 °C	1,061 mm	135
1946	37.5 °C21 May 1946	7.0 °C2 January 1946	23.4 °C	1,313 mm	137
1945	38.8 °C9 April 1945	4.9 °C8 January 1945	23.1 °C	1,193 mm	143
1944	39.3 °C15 May 1944	6.9 °C19 January 1944	23.3 °C	908 mm	144
1943	34.9 °C6 April 1943	6.5 °C2 February 1943	22.4 °C	1,043 mm	59
1942	37.7 °C22 April 1942	7.4 °C5 February 1942	23.1 °C	1,414 mm	109
1941	36.5 °C23 May 1941	7.0 °C12 January 1941	22.9 °C	1,235 mm	114
1940	38.3 °C16 April 1940	7.1 °C13 February 1940	22.8 °C	966 mm	115

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

29.7 °C

+0.7 °C

Hot days (≥ 30 °C)

206 d/yr

+46

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1436 mm

+24 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	22.0 °C	0.0 °C	1 mm	-12 mm
Feb	25.4 °C	+0.1 °C	2 mm	-11 mm
Mar	31.0 °C	+0.1 °C	10 mm	-5 mm
Apr	32.7 °C	-1.8 °C	125 mm	+91 mm
May	33.4 °C	-0.8 °C	67 mm	-10 mm
Jun	34.1 °C	+1.9 °C	119 mm	-129 mm
Jul	33.8 °C	+3.6 °C	154 mm	-253 mm
Aug	31.4 °C	+1.2 °C	450 mm	+145 mm
Sep	32.0 °C	+2.1 °C	172 mm	-49 mm
Oct	30.1 °C	+1.2 °C	336 mm	+267 mm
Nov	27.9 °C	+1.3 °C	1 mm	-6 mm
Dec	22.6 °C	-0.9 °C	0 mm	-5 mm

The year's extremes

Hottest day

39.4 °C

13 Jul 2025

Coldest day

8.4 °C

9 Jan 2025

Wettest day

101.5 mm

4 Oct 2025

Windiest day

28.7 km/h

17 Mar 2025

Strongest gust

66.6 km/h

17 Mar 2025

Hottest feels-like

45.5 °C

24 Jul 2025

Coldest feels-like

7.4 °C

3 Jan 2025

Sunniest day

13.0 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 Lahān?

Lahān has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 23.8 °C and it receives 1,412 mm of precipitation per year.

What is the hottest day ever recorded in Lahān?

The hottest day measured in Lahān between 1940 and 2025 was 26 May 1957, reaching 44.9 °C.

What is the coldest day in Lahān?

The coldest day measured in Lahān between 1940 and 2025 was 28 January 1964, at 3.2 °C.

Does it snow in Lahān?

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

Has the climate of Lahān warmed?

Yes: Lahān warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Lahān?

The wettest day measured in Lahān between 1940 and 2025 was 12 August 1987, with 428 mm of rain in 24 hours.

What was the windiest day in Lahān?

The windiest day measured in Lahān between 1940 and 2025 was 14 April 1992, with winds reaching 35.6 km/h.

What is the warmest month in Lahān?

The warmest month in Lahān is May (28.9 °C on average); the coldest is January (15.4 °C).

How much does it rain in Lahān?

Lahān receives on average 1,412 mm of precipitation per year, spread over about 140 rainy days.

Is it sunny in Lahān?

Lahān gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Are there tropical nights in Lahān?

Yes: Lahān has on average 196 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Lahān?

In Lahān, between 1940 and 2025, the highest apparent temperature reached 46.8 °C on 12 August 2019, and the lowest was 0.3 °C on 28 January 1964.

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