Climate averages 1991–2020
Karuri (Kiambu County), Kenya weather
in September.
A warm, fairly dry month: the 6th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Karuri (Kiambu County), Kenya: daytime highs average 22.1°C and nights cool to about 11.7°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 16 mm of rain on roughly 3 days, which makes September a fairly dry month (the 2nd 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 Kikuyu (13 km away). In September its highs average 21.9°C, about as warm as Karuri (Kiambu County), Kenya, with 16 mm of rain.
Among the 37 cities listed in Kenya, Karuri (Kiambu County), Kenya ranks 30th of 37 for the warmest September highs and joint 11th of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Karuri (Kiambu County), Kenya is 3.6°C cooler than that mean.
From September to October, average highs rise by 0.7°C to 22.8°C, and monthly rainfall rises from 16 mm to 40 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
Karuri (Kiambu County), Kenya climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.6°C12.8°C | 12.8°C | 35 | 6.3 | 12.212 h |
| February | 24.8°C13.3°C | 13.3°C | 30 | 4.6 | 12.212 h |
| March | 24.5°C14.0°C | 14.0°C | 57 | 10.3 | 12.112 h |
| April | 22.6°C14.3°C | 14.3°C | 114 | 19.4 | 12.112 h |
| May | 21.4°C13.4°C | 13.4°C | 92 | 16.0 | 12.112 h |
| June | 20.3°C12.0°C | 12.0°C | 42 | 7.9 | 12.112 h |
| July | 19.7°C10.9°C | 10.9°C | 13 | 3.2 | 12.112 h |
| August | 20.2°C11.1°C | 11.1°C | 21 | 3.9 | 12.112 h |
| September, selected | 22.1°C11.7°C | 11.7°C | 16 | 3.3 | 12.112 h |
| October | 22.8°C13.0°C | 13.0°C | 40 | 9.3 | 12.112 h |
| November | 21.3°C13.3°C | 13.3°C | 83 | 17.6 | 12.212 h |
| December | 22.0°C12.9°C | 12.9°C | 47 | 10.2 | 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
- Kikuyu in SeptemberKenya · 13 kmHigh 21.9°C · Low 11.5°C · 16 mm rain
- Nairobi in SeptemberKenya · 14 kmHigh 24.2°C · Low 13.2°C · 16 mm rain
- Limuru in SeptemberKenya · 15 kmHigh 20.3°C · Low 9.8°C · 32 mm rain
- Ngong in SeptemberKenya · 22 kmHigh 23.6°C · Low 12.5°C · 16 mm rain
- Ruiru in SeptemberKenya · 23 kmHigh 24.3°C · Low 13.2°C · 9.5 mm rain
- Ongata Rongai in SeptemberKenya · 24 kmHigh 23.8°C · Low 13.2°C · 12 mm rain
- Mlolongo in SeptemberKenya · 32 kmHigh 24.3°C · Low 13.5°C · 11 mm rain
- Thika in SeptemberKenya · 38 kmHigh 24.7°C · Low 13.7°C · 23 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 Karuri) is explained once on the Karuri (Kiambu County), Kenya year overview and on the Sources, method and limits page.
Nairobi, Kikuyu and Ngong lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.