Climate averages 1991–2020
Guwahati weather
in September.
A hot, very wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Guwahati: daytime highs average 30.3°C and nights cool to about 24.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 392 mm of rain on roughly 26 days, which makes September a very wet month (the 9th 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 Shillong (70 km away). In September its highs average 23.0°C, 7.3°C cooler than Guwahati, with 393 mm of rain.
Among the 692 cities listed in India, Guwahati ranks joint 440th of 692 for the warmest September highs and 685th of 692 for the driest September (rainfall, lowest first). The mean September high of those 692 cities is 30.7°C; Guwahati is 0.4°C cooler than that mean.
From September to October, average highs fall by 1.2°C to 29.0°C, and monthly rainfall falls from 392 mm to 133 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
Guwahati climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.7°C12.5°C | 12.5°C | 11 | 2.6 | 10.711 h |
| February | 25.4°C14.5°C | 14.5°C | 23 | 4.6 | 11.311 h |
| March | 29.6°C18.3°C | 18.3°C | 60 | 8.3 | 12.012 h |
| April | 30.0°C21.1°C | 21.1°C | 163 | 18.8 | 12.813 h |
| May | 29.9°C23.1°C | 23.1°C | 317 | 27.0 | 13.413 h |
| June | 30.4°C25.0°C | 25.0°C | 530 | 28.7 | 13.714 h |
| July | 30.6°C25.6°C | 25.6°C | 671 | 30.2 | 13.614 h |
| August | 30.9°C25.5°C | 25.5°C | 610 | 29.7 | 13.113 h |
| September, selected | 30.3°C24.6°C | 24.6°C | 392 | 26.0 | 12.312 h |
| October | 29.0°C22.0°C | 22.0°C | 133 | 14.0 | 11.612 h |
| November | 26.7°C17.7°C | 17.7°C | 18 | 2.8 | 10.911 h |
| December | 24.0°C13.9°C | 13.9°C | 9.2 | 1.6 | 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
- Shillong in SeptemberIndia · 70 kmHigh 23.0°C · Low 18.0°C · 393 mm rain
- Nagaon in SeptemberIndia · 94 kmHigh 30.6°C · Low 24.9°C · 344 mm rain
- Tezpur in SeptemberIndia · 116 kmHigh 29.9°C · Low 24.7°C · 332 mm rain
- Sunāmganj in SeptemberBangladesh · 129 kmHigh 29.2°C · Low 23.9°C · 521 mm rain
- Sylhet in SeptemberBangladesh · 143 kmHigh 30.1°C · Low 24.5°C · 523 mm rain
- Tura in SeptemberIndia · 171 kmHigh 29.1°C · Low 23.7°C · 269 mm rain
- Netrakona in SeptemberBangladesh · 177 kmHigh 30.6°C · Low 24.7°C · 333 mm rain
- Silchar in SeptemberIndia · 184 kmHigh 30.1°C · Low 24.4°C · 293 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 Guwahati) is explained once on the Guwahati year overview and on the Sources, method and limits page.