Climate averages 1991–2020
Arrah 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 Arrah: daytime highs average 23.7°C and nights cool to about 12.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 7.0 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 35 min on an average December day.
The nearest other city in this atlas is Chāpra (26 km away). In December its highs average 23.6°C, about as warm as Arrah, with 7.6 mm of rain.
Among the 692 cities listed in India, Arrah ranks joint 463rd of 692 for the warmest December highs and joint 258th of 692 for the driest December (rainfall, lowest first). The mean December high of those 692 cities is 25.6°C; Arrah is 1.9°C cooler than that mean.
From December to January, average highs fall by 1.7°C to 22.0°C, and monthly rainfall rises from 7.0 mm to 17 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
Arrah climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.0°C10.7°C | 10.7°C | 17 | 2.3 | 10.711 h |
| February | 25.9°C13.6°C | 13.6°C | 17 | 2.7 | 11.311 h |
| March | 32.3°C18.5°C | 18.5°C | 11 | 2.1 | 12.012 h |
| April | 37.5°C23.5°C | 23.5°C | 11 | 3.4 | 12.713 h |
| May | 38.3°C26.6°C | 26.6°C | 26 | 4.9 | 13.413 h |
| June | 36.1°C27.5°C | 27.5°C | 179 | 15.6 | 13.714 h |
| July | 32.1°C26.6°C | 26.6°C | 314 | 25.4 | 13.614 h |
| August | 31.7°C26.2°C | 26.2°C | 284 | 26.1 | 13.013 h |
| September | 31.0°C25.3°C | 25.3°C | 197 | 20.3 | 12.312 h |
| October | 30.2°C21.7°C | 21.7°C | 47 | 5.6 | 11.612 h |
| November | 27.7°C16.5°C | 16.5°C | 5.7 | 0.6 | 10.911 h |
| December, selected | 23.7°C12.2°C | 12.2°C | 7.0 | 0.8 | 10.611 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
- Chāpra in DecemberIndia · 26 kmHigh 23.6°C · Low 12.4°C · 7.6 mm rain
- Dinapore in DecemberIndia · 40 kmHigh 23.7°C · Low 12.3°C · 7.5 mm rain
- Patna in DecemberIndia · 48 kmHigh 23.8°C · Low 12.4°C · 7.4 mm rain
- Jahānābād in DecemberIndia · 50 kmHigh 23.9°C · Low 11.4°C · 7.2 mm rain
- Hājīpur in DecemberIndia · 57 kmHigh 23.8°C · Low 12.9°C · 6.2 mm rain
- Buxar in DecemberIndia · 69 kmHigh 23.6°C · Low 11.6°C · 6.9 mm rain
- Siwān in DecemberIndia · 80 kmHigh 23.7°C · Low 11.8°C · 7.6 mm rain
- Madhurampur Dehri in DecemberIndia · 80 kmHigh 23.7°C · Low 11.2°C · 7.2 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 Arrah) is explained once on the Arrah year overview and on the Sources, method and limits page.