Climate averages 1991–2020
Lahān weather
in May.
A hot, wet month: the 2nd warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Lahān: daytime highs average 33.6°C and nights cool to about 24.0°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 97 mm of rain on roughly 14 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 27 min on an average May day.
The nearest other city in this atlas is Triyuga (23 km away). In May its highs average 32.7°C, 0.9°C cooler than Lahān, with 101 mm of rain.
Among the 16 cities listed in Nepal, Lahān ranks 7th of 16 for the warmest May highs and 7th of 16 for the driest May (rainfall, lowest first). The mean May high of those 16 cities is 32.7°C; Lahān is 0.9°C warmer than that mean.
From May to June, average highs fall by 2.0°C to 31.6°C, and monthly rainfall rises from 97 mm to 253 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Lahān climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.4°C10.1°C | 10.1°C | 11 | 1.7 | 10.711 h |
| February | 24.9°C12.5°C | 12.5°C | 12 | 2.1 | 11.211 h |
| March | 30.7°C16.8°C | 16.8°C | 12 | 2.4 | 12.012 h |
| April | 34.1°C21.3°C | 21.3°C | 31 | 5.7 | 12.813 h |
| May, selected | 33.6°C24.0°C | 24.0°C | 97 | 13.6 | 13.413 h |
| June | 31.6°C25.1°C | 25.1°C | 253 | 23.0 | 13.814 h |
| July | 29.9°C25.1°C | 25.1°C | 412 | 27.5 | 13.614 h |
| August | 30.0°C25.1°C | 25.1°C | 279 | 27.2 | 13.113 h |
| September | 29.5°C24.0°C | 24.0°C | 239 | 22.9 | 12.312 h |
| October | 28.8°C20.3°C | 20.3°C | 57 | 6.8 | 11.512 h |
| November | 26.5°C15.3°C | 15.3°C | 3.8 | 0.5 | 10.911 h |
| December | 23.1°C11.6°C | 11.6°C | 4.0 | 0.8 | 10.510 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Triyuga in MayNepal · 23 kmHigh 32.7°C · Low 23.6°C · 101 mm rain
- Janakpur in MayNepal · 55 kmHigh 35.2°C · Low 25.0°C · 87 mm rain
- Madhubani in MayIndia · 58 kmHigh 35.4°C · Low 25.1°C · 79 mm rain
- Inaruwa in MayNepal · 67 kmHigh 32.4°C · Low 23.7°C · 118 mm rain
- Dharān in MayNepal · 80 kmHigh 29.9°C · Low 21.8°C · 127 mm rain
- Benipur in MayIndia · 81 kmHigh 36.0°C · Low 25.2°C · 82 mm rain
- Biratnagar in MayNepal · 84 kmHigh 32.8°C · Low 24.2°C · 118 mm rain
- Darbhanga in MayIndia · 86 kmHigh 36.1°C · Low 25.2°C · 79 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Lahān) is explained once on the Lahān year overview and on the Sources, method and limits page.