Climate averages 1991–2020
Kisii weather
in September.
A warm, wet month: the joint 4th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Kisii: daytime highs average 25.1°C and nights cool to about 14.7°C. By daytime temperature it is the joint 4th warmest of the 12 months.
Expect about 93 mm of rain on roughly 14 days, which makes September a wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average September day.
The nearest other city in this atlas is Migori (54 km away). In September its highs average 28.0°C, 2.9°C warmer than Kisii, with 67 mm of rain.
Among the 37 cities listed in Kenya, Kisii ranks 20th of 37 for the warmest September highs and 31st of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Kisii is 0.6°C cooler than that mean.
From September to October, average highs rise by 0.2°C to 25.3°C, and monthly rainfall rises from 93 mm to 149 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
Kisii climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.1°C14.6°C | 14.6°C | 151 | 16.7 | 12.212 h |
| February | 26.4°C15.0°C | 15.0°C | 99 | 13.0 | 12.112 h |
| March | 26.1°C15.2°C | 15.2°C | 189 | 18.9 | 12.112 h |
| April | 25.0°C15.4°C | 15.4°C | 277 | 23.4 | 12.112 h |
| May | 24.5°C15.3°C | 15.3°C | 176 | 19.6 | 12.112 h |
| June | 23.7°C14.6°C | 14.6°C | 87 | 13.6 | 12.112 h |
| July | 23.6°C14.1°C | 14.1°C | 51 | 10.7 | 12.112 h |
| August | 24.2°C14.2°C | 14.2°C | 77 | 13.1 | 12.112 h |
| September, selected | 25.1°C14.7°C | 14.7°C | 93 | 14.2 | 12.112 h |
| October | 25.3°C15.1°C | 15.1°C | 149 | 17.5 | 12.112 h |
| November | 24.5°C14.6°C | 14.6°C | 260 | 23.3 | 12.112 h |
| December | 24.5°C14.5°C | 14.5°C | 216 | 21.2 | 12.212 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
- Migori in SeptemberKenya · 54 kmHigh 28.0°C · Low 17.1°C · 67 mm rain
- Kisumu in SeptemberKenya · 64 kmHigh 28.2°C · Low 18.2°C · 106 mm rain
- Tarime in SeptemberTanzania · 87 kmHigh 28.7°C · Low 16.7°C · 49 mm rain
- Khwisero in SeptemberKenya · 97 kmHigh 25.3°C · Low 15.7°C · 137 mm rain
- Kakamega in SeptemberKenya · 107 kmHigh 25.3°C · Low 13.9°C · 104 mm rain
- Musoma in SeptemberTanzania · 141 kmHigh 27.1°C · Low 20.1°C · 67 mm rain
- Eldoret in SeptemberKenya · 145 kmHigh 21.8°C · Low 11.9°C · 199 mm rain
- Busia in SeptemberKenya · 146 kmHigh 26.4°C · Low 16.6°C · 181 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 Kisii) is explained once on the Kisii year overview and on the Sources, method and limits page.