Climate averages 1991–2020
Koch Bihār weather
in September.
A hot, very wet month: the joint 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Koch Bihār: daytime highs average 30.2°C and nights cool to about 24.6°C. By daytime temperature it is the joint 4th warmest of the 12 months.
Expect about 460 mm of rain on roughly 27 days, which makes September a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average September day.
The nearest other city in this atlas is Jaigaon (58 km away). In September its highs average 27.8°C, 2.4°C cooler than Koch Bihār, with 418 mm of rain.
Among the 692 cities listed in India, Koch Bihār ranks joint 457th of 692 for the warmest September highs and 690th of 692 for the driest September (rainfall, lowest first). The mean September high of those 692 cities is 30.7°C; Koch Bihār is 0.4°C cooler than that mean.
From September to October, average highs fall by 0.9°C to 29.3°C, and monthly rainfall falls from 460 mm to 171 mm.
The annual picture
September 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
Koch Bihār climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.0°C11.9°C | 11.9°C | 13 | 2.0 | 10.711 h |
| February | 25.7°C14.3°C | 14.3°C | 22 | 3.5 | 11.311 h |
| March | 30.2°C18.4°C | 18.4°C | 59 | 7.0 | 12.012 h |
| April | 30.7°C21.3°C | 21.3°C | 207 | 17.4 | 12.813 h |
| May | 29.8°C23.0°C | 23.0°C | 561 | 26.4 | 13.413 h |
| June | 30.2°C24.8°C | 24.8°C | 755 | 29.1 | 13.814 h |
| July | 30.6°C25.5°C | 25.5°C | 690 | 30.6 | 13.614 h |
| August | 31.0°C25.5°C | 25.5°C | 590 | 30.1 | 13.113 h |
| September, selected | 30.2°C24.6°C | 24.6°C | 460 | 26.7 | 12.312 h |
| October | 29.3°C21.7°C | 21.7°C | 171 | 12.5 | 11.612 h |
| November | 27.3°C16.9°C | 16.9°C | 9.9 | 1.8 | 10.911 h |
| December | 24.6°C13.4°C | 13.4°C | 5.6 | 0.9 | 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
September in nearby cities
- Jaigaon in SeptemberIndia · 58 kmHigh 27.8°C · Low 23.6°C · 418 mm rain
- Rangpur in SeptemberBangladesh · 67 kmHigh 30.4°C · Low 24.8°C · 334 mm rain
- Jalpāiguri in SeptemberIndia · 74 kmHigh 29.7°C · Low 24.2°C · 468 mm rain
- Saidpur in SeptemberBangladesh · 82 kmHigh 30.5°C · Low 24.7°C · 338 mm rain
- Thākurgaon in SeptemberBangladesh · 103 kmHigh 30.3°C · Low 24.6°C · 310 mm rain
- Siliguri in SeptemberIndia · 110 kmHigh 29.0°C · Low 23.5°C · 411 mm rain
- Dinajpur in SeptemberBangladesh · 112 kmHigh 30.6°C · Low 24.7°C · 331 mm rain
- Tura in SeptemberIndia · 118 kmHigh 29.1°C · Low 23.7°C · 269 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 Koch Bihār) is explained once on the Koch Bihār year overview and on the Sources, method and limits page.