Climate averages 1991–2020
Siwān weather
in August.
A hot, very wet month: the 6th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Siwān: daytime highs average 31.5°C and nights cool to about 26.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 294 mm of rain on roughly 27 days, which makes August a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 04 min on an average August day.
The nearest other city in this atlas is Chāpra (63 km away). In August its highs average 31.6°C, about as warm as Siwān, with 275 mm of rain.
Among the 692 cities listed in India, Siwān ranks joint 189th of 692 for the warmest August highs and joint 533rd of 692 for the driest August (rainfall, lowest first). The mean August high of those 692 cities is 30.2°C; Siwān is 1.3°C warmer than that mean.
From August to September, average highs fall by 0.6°C to 30.9°C, and monthly rainfall falls from 294 mm to 205 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Chāpra in AugustIndia · 63 kmHigh 31.6°C · Low 26.2°C · 275 mm rain
- Deoria in AugustIndia · 65 kmHigh 31.5°C · Low 26.0°C · 301 mm rain
- Bettiah in AugustIndia · 66 kmHigh 31.4°C · Low 25.8°C · 332 mm rain
- Mothīhāri in AugustIndia · 73 kmHigh 31.5°C · Low 25.9°C · 385 mm rain
- Kushinagar in AugustIndia · 74 kmHigh 31.4°C · Low 25.9°C · 310 mm rain
- Arrah in AugustIndia · 80 kmHigh 31.7°C · Low 26.2°C · 284 mm rain
- Buxar in AugustIndia · 81 kmHigh 31.7°C · Low 26.2°C · 290 mm rain
- Mau in AugustIndia · 85 kmHigh 31.5°C · Low 26.0°C · 284 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.