Climate averages 1991–2020
Nanyuki weather
in September.
A mild, moderately wet month: the joint 6th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Nanyuki: daytime highs average 21.6°C and nights cool to about 12.3°C. By daytime temperature it is the joint 6th warmest of the 12 months.
Expect about 41 mm of rain on roughly 9 days, which makes September a moderately wet month (the 2nd 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 Nyeri (49 km away). In September its highs average 20.4°C, 1.2°C cooler than Nanyuki, with 46 mm of rain.
Among the 37 cities listed in Kenya, Nanyuki ranks 33rd of 37 for the warmest September highs and 22nd of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Nanyuki is 4.1°C cooler than that mean.
From September to October, average highs rise by 0.1°C to 21.7°C, and monthly rainfall rises from 41 mm to 219 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
Nanyuki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.5°C11.4°C | 11.4°C | 45 | 7.5 | 12.112 h |
| February | 23.8°C11.4°C | 11.4°C | 32 | 4.9 | 12.112 h |
| March | 23.9°C12.1°C | 12.1°C | 66 | 10.5 | 12.112 h |
| April | 22.5°C13.5°C | 13.5°C | 218 | 19.7 | 12.112 h |
| May | 21.6°C13.7°C | 13.7°C | 199 | 15.4 | 12.112 h |
| June | 20.9°C12.8°C | 12.8°C | 42 | 8.9 | 12.112 h |
| July | 20.0°C12.0°C | 12.0°C | 45 | 10.2 | 12.112 h |
| August | 20.3°C12.1°C | 12.1°C | 54 | 10.9 | 12.112 h |
| September, selected | 21.6°C12.3°C | 12.3°C | 41 | 8.5 | 12.112 h |
| October | 21.7°C12.7°C | 12.7°C | 219 | 18.1 | 12.112 h |
| November | 20.8°C12.5°C | 12.5°C | 203 | 22.4 | 12.112 h |
| December | 21.4°C11.9°C | 11.9°C | 62 | 12.8 | 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
- Nyeri in SeptemberKenya · 49 kmHigh 20.4°C · Low 10.9°C · 46 mm rain
- Meru in SeptemberKenya · 65 kmHigh 24.6°C · Low 14.2°C · 10 mm rain
- Isiolo in SeptemberKenya · 69 kmHigh 29.2°C · Low 17.2°C · 27 mm rain
- Karuri (Murang'A), Kenya in SeptemberKenya · 79 kmHigh 25.3°C · Low 14.5°C · 27 mm rain
- Naivasha in SeptemberKenya · 107 kmHigh 21.1°C · Low 12.0°C · 53 mm rain
- Thika in SeptemberKenya · 116 kmHigh 24.7°C · Low 13.7°C · 23 mm rain
- Nakuru in SeptemberKenya · 117 kmHigh 23.1°C · Low 11.6°C · 51 mm rain
- Ruiru in SeptemberKenya · 129 kmHigh 24.3°C · Low 13.2°C · 9.5 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 Nanyuki) is explained once on the Nanyuki year overview and on the Sources, method and limits page.