Climate averages 1991–2020
Biratnagar 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 Biratnagar: daytime highs average 32.8°C and nights cool to about 24.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 118 mm of rain on roughly 15 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 26 min on an average May day.
The nearest other city in this atlas is Inaruwa (21 km away). In May its highs average 32.4°C, about as warm as Biratnagar, with 118 mm of rain.
Among the 16 cities listed in Nepal, Biratnagar ranks joint 8th of 16 for the warmest May highs and joint 9th of 16 for the driest May (rainfall, lowest first). The mean May high of those 16 cities is 32.7°C; Biratnagar is 0.2°C warmer than that mean.
From May to June, average highs fall by 1.6°C to 31.2°C, and monthly rainfall rises from 118 mm to 306 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
Biratnagar climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.3°C11.1°C | 11.1°C | 8.9 | 1.4 | 10.711 h |
| February | 25.3°C13.5°C | 13.5°C | 12 | 1.7 | 11.211 h |
| March | 31.0°C17.9°C | 17.9°C | 12 | 2.4 | 12.012 h |
| April | 33.9°C22.1°C | 22.1°C | 34 | 6.2 | 12.813 h |
| May, selected | 32.8°C24.2°C | 24.2°C | 118 | 14.9 | 13.413 h |
| June | 31.2°C25.2°C | 25.2°C | 306 | 24.5 | 13.814 h |
| July | 30.4°C25.4°C | 25.4°C | 412 | 29.5 | 13.614 h |
| August | 30.6°C25.4°C | 25.4°C | 346 | 28.5 | 13.113 h |
| September | 30.0°C24.4°C | 24.4°C | 277 | 23.0 | 12.312 h |
| October | 29.4°C21.0°C | 21.0°C | 77 | 6.1 | 11.612 h |
| November | 27.3°C16.1°C | 16.1°C | 3.6 | 0.6 | 10.911 h |
| December | 24.0°C12.4°C | 12.4°C | 3.9 | 0.5 | 10.511 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
- Inaruwa in MayNepal · 21 kmHigh 32.4°C · Low 23.7°C · 118 mm rain
- Dharān in MayNepal · 40 kmHigh 29.9°C · Low 21.8°C · 127 mm rain
- Arāria in MayIndia · 42 kmHigh 32.7°C · Low 24.0°C · 208 mm rain
- Triyuga in MayNepal · 68 kmHigh 32.7°C · Low 23.6°C · 101 mm rain
- Purnia in MayIndia · 78 kmHigh 33.3°C · Low 24.2°C · 160 mm rain
- Kishanganj in MayIndia · 79 kmHigh 31.8°C · Low 23.7°C · 215 mm rain
- Lahān in MayNepal · 84 kmHigh 33.6°C · Low 24.0°C · 97 mm rain
- Saharsa in MayIndia · 93 kmHigh 35.2°C · Low 24.9°C · 82 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 Biratnagar) is explained once on the Biratnagar year overview and on the Sources, method and limits page.
Inaruwa lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.