Climate averages 1991–2020
Khwisero weather
in September.
A warm, wet month: the joint 5th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Khwisero: daytime highs average 25.3°C and nights cool to about 15.7°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 137 mm of rain on roughly 25 days, which makes September a wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average September day.
The nearest other city in this atlas is Kakamega (22 km away). In September its highs average 25.3°C, about as warm as Khwisero, with 104 mm of rain.
Among the 37 cities listed in Kenya, Khwisero ranks joint 17th of 37 for the warmest September highs and 34th of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Khwisero is 0.4°C cooler than that mean.
From September to October, average highs fall by 0.1°C to 25.2°C, and monthly rainfall rises from 137 mm to 189 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
Khwisero climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.5°C16.0°C | 16.0°C | 101 | 15.8 | 12.112 h |
| February | 27.5°C16.6°C | 16.6°C | 82 | 13.8 | 12.112 h |
| March | 26.9°C16.5°C | 16.5°C | 158 | 21.6 | 12.112 h |
| April | 25.3°C16.4°C | 16.4°C | 256 | 27.3 | 12.112 h |
| May | 24.7°C16.1°C | 16.1°C | 237 | 28.3 | 12.112 h |
| June | 24.2°C15.7°C | 15.7°C | 144 | 24.8 | 12.112 h |
| July | 23.9°C15.5°C | 15.5°C | 119 | 22.0 | 12.112 h |
| August | 24.4°C15.6°C | 15.6°C | 139 | 24.7 | 12.112 h |
| September, selected | 25.3°C15.7°C | 15.7°C | 137 | 24.7 | 12.112 h |
| October | 25.2°C16.0°C | 16.0°C | 189 | 27.9 | 12.112 h |
| November | 25.0°C15.8°C | 15.8°C | 197 | 25.8 | 12.112 h |
| December | 25.6°C15.6°C | 15.6°C | 137 | 20.0 | 12.112 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
- Kakamega in SeptemberKenya · 22 kmHigh 25.3°C · Low 13.9°C · 104 mm rain
- Kisumu in SeptemberKenya · 36 kmHigh 28.2°C · Low 18.2°C · 106 mm rain
- Busia in SeptemberKenya · 63 kmHigh 26.4°C · Low 16.6°C · 181 mm rain
- Eldoret in SeptemberKenya · 85 kmHigh 21.8°C · Low 11.9°C · 199 mm rain
- Kisii in SeptemberKenya · 97 kmHigh 25.1°C · Low 14.7°C · 93 mm rain
- Kitale in SeptemberKenya · 104 kmHigh 19.8°C · Low 10.7°C · 174 mm rain
- Migori in SeptemberKenya · 138 kmHigh 28.0°C · Low 17.1°C · 67 mm rain
- Njeru in SeptemberUganda · 160 kmHigh 25.2°C · Low 19.0°C · 151 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 Khwisero) is explained once on the Khwisero year overview and on the Sources, method and limits page.