Climate averages 1991–2020
Lahān weather
in December.
A warm, very dry month: the 11th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Lahān: daytime highs average 23.1°C and nights cool to about 11.6°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 4.0 mm of rain on fewer than one day, which makes December a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 30 min on an average December day.
The nearest other city in this atlas is Triyuga (23 km away). In December its highs average 22.9°C, about as warm as Lahān, with 3.6 mm of rain.
Among the 16 cities listed in Nepal, Lahān ranks 5th of 16 for the warmest December highs and 4th of 16 for the driest December (rainfall, lowest first). The mean December high of those 16 cities is 21.6°C; Lahān is 1.5°C warmer than that mean.
From December to January, average highs fall by 1.7°C to 21.4°C, and monthly rainfall rises from 4.0 mm to 11 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Triyuga in DecemberNepal · 23 kmHigh 22.9°C · Low 12.0°C · 3.6 mm rain
- Janakpur in DecemberNepal · 55 kmHigh 23.6°C · Low 12.2°C · 5.0 mm rain
- Madhubani in DecemberIndia · 58 kmHigh 24.1°C · Low 12.3°C · 5.6 mm rain
- Inaruwa in DecemberNepal · 67 kmHigh 23.2°C · Low 12.1°C · 3.9 mm rain
- Dharān in DecemberNepal · 80 kmHigh 21.4°C · Low 11.0°C · 4.6 mm rain
- Benipur in DecemberIndia · 81 kmHigh 24.2°C · Low 12.3°C · 5.5 mm rain
- Biratnagar in DecemberNepal · 84 kmHigh 24.0°C · Low 12.4°C · 3.9 mm rain
- Darbhanga in DecemberIndia · 86 kmHigh 24.0°C · Low 12.2°C · 5.6 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.