Climate averages 1991–2020
Nyeri weather
in September.
A mild, moderately wet month: the 8th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Nyeri: daytime highs average 20.4°C and nights cool to about 10.9°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 46 mm of rain on roughly 12 days, which makes September a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average September day.
The nearest other city in this atlas is Karuri (Murang'A), Kenya (41 km away). In September its highs average 25.3°C, 4.9°C warmer than Nyeri, with 27 mm of rain.
Among the 37 cities listed in Kenya, Nyeri ranks 35th of 37 for the warmest September highs and 25th of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Nyeri is 5.3°C cooler than that mean.
From September to October, average highs rise by 0.5°C to 20.9°C, and monthly rainfall rises from 46 mm to 129 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
Nyeri climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.6°C10.9°C | 10.9°C | 110 | 14.5 | 12.112 h |
| February | 23.8°C11.1°C | 11.1°C | 85 | 12.1 | 12.112 h |
| March | 23.5°C12.2°C | 12.2°C | 133 | 18.4 | 12.112 h |
| April | 21.5°C13.4°C | 13.4°C | 206 | 25.4 | 12.112 h |
| May | 20.5°C13.2°C | 13.2°C | 158 | 22.2 | 12.112 h |
| June | 19.6°C11.9°C | 11.9°C | 77 | 16.6 | 12.112 h |
| July | 18.6°C10.8°C | 10.8°C | 51 | 14.1 | 12.112 h |
| August | 18.9°C10.7°C | 10.7°C | 57 | 15.4 | 12.112 h |
| September, selected | 20.4°C10.9°C | 10.9°C | 46 | 11.9 | 12.112 h |
| October | 20.9°C12.1°C | 12.1°C | 129 | 18.7 | 12.112 h |
| November | 20.2°C12.4°C | 12.4°C | 230 | 26.4 | 12.112 h |
| December | 21.1°C11.5°C | 11.5°C | 181 | 22.0 | 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
- Karuri (Murang'A), Kenya in SeptemberKenya · 41 kmHigh 25.3°C · Low 14.5°C · 27 mm rain
- Nanyuki in SeptemberKenya · 49 kmHigh 21.6°C · Low 12.3°C · 41 mm rain
- Naivasha in SeptemberKenya · 66 kmHigh 21.1°C · Low 12.0°C · 53 mm rain
- Thika in SeptemberKenya · 70 kmHigh 24.7°C · Low 13.7°C · 23 mm rain
- Ruiru in SeptemberKenya · 81 kmHigh 24.3°C · Low 13.2°C · 9.5 mm rain
- Limuru in SeptemberKenya · 84 kmHigh 20.3°C · Low 9.8°C · 32 mm rain
- Karuri (Kiambu County), Kenya in SeptemberKenya · 87 kmHigh 22.1°C · Low 11.7°C · 16 mm rain
- Meru in SeptemberKenya · 94 kmHigh 24.6°C · Low 14.2°C · 10 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 Nyeri) is explained once on the Nyeri year overview and on the Sources, method and limits page.