Climate averages 1991–2020
Siwān weather
in April.
A very hot, very dry month: the 2nd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a very hot month in Siwān: daytime highs average 37.1°C and nights cool to about 23.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 10 mm of rain on roughly 3 days, which makes April a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 46 min on an average April day.
The nearest other city in this atlas is Chāpra (63 km away). In April its highs average 37.2°C, about as warm as Siwān, with 10 mm of rain.
Among the 692 cities listed in India, Siwān ranks joint 254th of 692 for the warmest April highs and joint 239th of 692 for the driest April (rainfall, lowest first). The mean April high of those 692 cities is 36.0°C; Siwān is 1.1°C warmer than that mean.
From April to May, average highs rise by 0.5°C to 37.6°C, and monthly rainfall rises from 10 mm to 29 mm.
The annual picture
April 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
Siwān climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.8°C10.3°C | 10.3°C | 16 | 2.2 | 10.711 h |
| February | 25.7°C13.2°C | 13.2°C | 17 | 2.4 | 11.311 h |
| March | 32.0°C18.2°C | 18.2°C | 12 | 2.1 | 12.012 h |
| April, selected | 37.1°C23.3°C | 23.3°C | 10 | 2.5 | 12.813 h |
| May | 37.6°C26.1°C | 26.1°C | 29 | 5.2 | 13.413 h |
| June | 35.6°C27.0°C | 27.0°C | 180 | 15.5 | 13.814 h |
| July | 31.9°C26.3°C | 26.3°C | 329 | 26.0 | 13.614 h |
| August | 31.5°C26.0°C | 26.0°C | 294 | 26.6 | 13.113 h |
| September | 30.9°C25.0°C | 25.0°C | 205 | 20.5 | 12.312 h |
| October | 30.2°C21.3°C | 21.3°C | 37 | 4.3 | 11.612 h |
| November | 27.8°C16.0°C | 16.0°C | 4.5 | 0.4 | 10.911 h |
| December | 23.7°C11.8°C | 11.8°C | 7.6 | 0.7 | 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
April in nearby cities
- Chāpra in AprilIndia · 63 kmHigh 37.2°C · Low 23.5°C · 10 mm rain
- Deoria in AprilIndia · 65 kmHigh 37.0°C · Low 23.1°C · 14 mm rain
- Bettiah in AprilIndia · 66 kmHigh 36.2°C · Low 22.7°C · 21 mm rain
- Mothīhāri in AprilIndia · 73 kmHigh 36.5°C · Low 23.2°C · 30 mm rain
- Kushinagar in AprilIndia · 74 kmHigh 36.8°C · Low 22.9°C · 15 mm rain
- Arrah in AprilIndia · 80 kmHigh 37.5°C · Low 23.5°C · 11 mm rain
- Buxar in AprilIndia · 81 kmHigh 37.8°C · Low 23.4°C · 8.4 mm rain
- Mau in AprilIndia · 85 kmHigh 37.6°C · Low 23.4°C · 9.5 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 Siwān) is explained once on the Siwān year overview and on the Sources, method and limits page.