Climate Insights for Lahān

Siraha, Madhesh, Nepal

Hottest
April
35°C peak
Coldest
January
10°C low
Wettest
July
363mm rain
Best to Visit
January, February, March
Mild temps & low rain

Climate Overview

The climate in Lahān is warm and mild. The average annual temperature is 24°C and approximately 1398mm of precipitation falls per year. July is the wettest month, receiving around 363mm 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: 26° Average: 19° Min: 13° Mar Max: 31° Average: 24° Min: 18° Apr Max: 35° Average: 28° Min: 22° May Max: 34° Average: 29° Min: 24° Jun Max: 33° Average: 29° Min: 26° Jul Max: 32° Average: 29° Min: 26° Aug Max: 32° Average: 29° Min: 26° Sep Max: 31° Average: 28° Min: 25° Oct Max: 31° Average: 26° Min: 22° Nov Max: 28° Average: 21° Min: 16° Dec Max: 24° Average: 17° Min: 11°
Max
Average
Min

Temperatures in Lahān vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is April, when average highs reach 35°C and the mean temperature sits around 28°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 400mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 7mm Feb Precipitation: 10mm Mar Precipitation: 22mm Apr Precipitation: 40mm May Precipitation: 98mm Jun Precipitation: 208mm Jul Precipitation: 363mm Aug Precipitation: 296mm Sep Precipitation: 253mm Oct Precipitation: 96mm Nov Precipitation: 1mm Dec Precipitation: 4mm
Precipitation

Lahān is a fairly wet location, receiving approximately 1398mm of precipitation annually, which averages out to around 116mm per month. The wettest month is July, averaging 363mm of rainfall. August and September also tend to see above-average precipitation. The driest month is November, with just 1mm. That's 363mm 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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 5km/h Feb Wind Speed: 6km/h Mar Wind Speed: 8km/h Apr Wind Speed: 9km/h May Wind Speed: 8km/h Jun Wind Speed: 8km/h Jul Wind Speed: 8km/h Aug Wind Speed: 7km/h Sep Wind Speed: 6km/h Oct Wind Speed: 5km/h Nov Wind Speed: 5km/h Dec Wind Speed: 5km/h
Wind Speed

Lahān is relatively calm, with an average annual wind speed of 7km/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 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 6km/h in winter, 8km/h in spring, 8km/h in summer, 5km/h in autumn.

Seasons

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

7 days until Autumn

It is currently summer in Lahān, which began on June 21, 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 35°C, while the coldest stretch bottoms out in January near 10°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

Spring

Temperatures range from 18 to 35°C. Precipitation is moderate at around 160mm for the season, averaging 53mm per month. Winds are generally light, averaging 8km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.

Summer

Temperatures range from 26 to 33°C. Rainfall is heavy, totalling around 867mm across the season with a monthly average of 289mm. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.

Autumn

Temperatures range from 16 to 31°C. Rainfall is heavy, totalling around 350mm across the season with a monthly average of 117mm. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 10 to 26°C. Precipitation is minimal, with only around 21mm for the entire season. Winds are generally light, averaging 6km/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 24°
Apr 28°
May 29°
Jun 29°
Jul 29°
Aug 29°
Sep 28°
Oct 26°
Nov 21°
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 19°C with modest rainfall averaging 9mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 35°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
5 km/h
7 mm
0 cm
Feb
13 °C
26 °C
6 km/h
10 mm
0 cm
Mar
18 °C
31 °C
8 km/h
22 mm
0 cm
Apr
22 °C
35 °C
9 km/h
40 mm
0 cm
May
24 °C
34 °C
8 km/h
98 mm
0 cm
Jun
26 °C
33 °C
8 km/h
208 mm
0 cm
Jul
26 °C
32 °C
8 km/h
363 mm
0 cm
Aug
26 °C
32 °C
7 km/h
296 mm
0 cm
Sep Current
25 °C
31 °C
6 km/h
253 mm
0 cm
Oct
22 °C
31 °C
5 km/h
96 mm
0 cm
Nov
16 °C
28 °C
5 km/h
1 mm
0 cm
Dec
11 °C
24 °C
5 km/h
4 mm
0 cm
Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)