Climate Insights for Lahān

Siraha, Madhesh, Nepal

Hottest
April
36°C peak
Coldest
January
10°C low
Wettest
July
332mm rain
Best to Visit
January, February, March
Mild temps & low rain

Climate Overview

The climate in Lahān is hot. The average annual temperature is 25°C and approximately 1195mm of precipitation falls per year. July is the wettest month, receiving around 332mm of rainfall. Lahān is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, June. The coldest months are January, December, February, when temperatures can drop to 10°C.

Temperature

10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 22° Average: 15° Min: 10° Feb Max: 27° Average: 19° Min: 13° Mar Max: 32° Average: 25° Min: 19° Apr Max: 36° Average: 29° Min: 23° May Max: 35° Average: 30° Min: 25° Jun Max: 35° Average: 30° Min: 27° Jul Max: 32° Average: 29° Min: 27° Aug Max: 32° Average: 29° Min: 27° Sep Max: 32° Average: 29° Min: 26° Oct Max: 32° Average: 26° Min: 22° Nov Max: 29° Average: 22° Min: 16° Dec Max: 25° Average: 17° Min: 12°
Max
Average
Min

Temperatures in Lahān vary considerably across the year, with a 26°C difference between the coldest and warmest months. April is the hottest month, with daytime highs reaching 36°C and an average of 29°C. January is the coolest month, with minimum temperatures around 10°C and an average of 15°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 5°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm 250mm 300mm 350mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 6mm Feb Precipitation: 9mm Mar Precipitation: 21mm Apr Precipitation: 25mm May Precipitation: 79mm Jun Precipitation: 170mm Jul Precipitation: 332mm Aug Precipitation: 266mm Sep Precipitation: 230mm Oct Precipitation: 53mm Nov Precipitation: 0mm Dec Precipitation: 4mm
Precipitation

Lahān is a moderately rainy area, receiving approximately 1195mm of precipitation annually, which averages out to around 100mm per month. The wettest month is July, averaging 332mm of rainfall. August and September also tend to see above-average precipitation. The driest month is November, with just 0mm. That's 331mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 10km/h Feb Wind Speed: 13km/h Mar Wind Speed: 16km/h Apr Wind Speed: 17km/h May Wind Speed: 15km/h Jun Wind Speed: 15km/h Jul Wind Speed: 15km/h Aug Wind Speed: 13km/h Sep Wind Speed: 12km/h Oct Wind Speed: 9km/h Nov Wind Speed: 9km/h Dec Wind Speed: 9km/h
Wind Speed

Lahān is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 8km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 11km/h in winter, 16km/h in spring, 14km/h in summer, 10km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

89 days until Summer

It is currently spring in Lahān, which began on March 20, 2026. Lahān is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 36°C, while the coldest stretch bottoms out in January near 10°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 19 to 36°C. Rainfall is relatively light, with around 125mm over the season and a monthly average of 42mm. Winds are moderate at around 16km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 27 to 35°C. Rainfall is heavy, totalling around 767mm across the season with a monthly average of 256mm. Winds are generally light, averaging 14km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 16 to 32°C. Precipitation is moderate at around 283mm for the season, averaging 94mm per month. Winds are generally light, averaging 10km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 10 to 27°C. Precipitation is minimal, with only around 19mm for the entire season. Winds are generally light, averaging 11km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan 15°
Feb 19°
Mar 25°
Apr 29°
May 30°
Jun 30°
Jul 29°
Aug 29°
Sep 29°
Oct 26°
Nov 22°
Dec 17°

The best time to visit Lahān is during January, February, March, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 8mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 36°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

Monthly Climate Data

The table below shows monthly climate averages for Lahān based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
10 °C
22 °C
10 km/h
6 mm
0 cm
Feb
13 °C
27 °C
13 km/h
9 mm
0 cm
Mar Current
19 °C
32 °C
16 km/h
21 mm
0 cm
Apr
23 °C
36 °C
17 km/h
25 mm
0 cm
May
25 °C
35 °C
15 km/h
79 mm
0 cm
Jun
27 °C
35 °C
15 km/h
170 mm
0 cm
Jul
27 °C
32 °C
15 km/h
332 mm
0 cm
Aug
27 °C
32 °C
13 km/h
266 mm
0 cm
Sep
26 °C
32 °C
12 km/h
230 mm
0 cm
Oct
22 °C
32 °C
9 km/h
53 mm
0 cm
Nov
16 °C
29 °C
9 km/h
0 mm
0 cm
Dec
12 °C
25 °C
9 km/h
4 mm
0 cm
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Metric (°C, km/h)