Climate averages 1991–2020
Meru weather
in September.
A warm, very dry month: the joint 3rd warmest and one of the 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 Meru: daytime highs average 24.6°C and nights cool to about 14.2°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 10 mm of rain on roughly 2 days, which makes September a very dry month (one of the driest months 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 Isiolo (35 km away). In September its highs average 29.2°C, 4.6°C warmer than Meru, with 27 mm of rain.
Among the 37 cities listed in Kenya, Meru ranks 22nd of 37 for the warmest September highs and joint 6th of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Meru is 1.1°C cooler than that mean.
From September to October, average highs stay level at 24.6°C, and monthly rainfall rises from 10 mm to 43 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
Meru climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 24.1°C13.9°C | 13.9°C | 39 | 7.5 | 12.112 h |
| February | 25.5°C14.4°C | 14.4°C | 20 | 4.8 | 12.112 h |
| March | 25.5°C15.1°C | 15.1°C | 42 | 8.8 | 12.112 h |
| April | 24.2°C15.9°C | 15.9°C | 84 | 13.8 | 12.112 h |
| May | 23.7°C15.6°C | 15.6°C | 37 | 7.3 | 12.112 h |
| June | 22.9°C14.4°C | 14.4°C | 13 | 2.8 | 12.112 h |
| July | 22.4°C13.6°C | 13.6°C | 10 | 1.8 | 12.112 h |
| August | 23.0°C13.6°C | 13.6°C | 11 | 2.2 | 12.112 h |
| September, selected | 24.6°C14.2°C | 14.2°C | 10 | 2.1 | 12.112 h |
| October | 24.6°C15.1°C | 15.1°C | 43 | 9.2 | 12.112 h |
| November | 22.1°C14.7°C | 14.7°C | 112 | 20.6 | 12.112 h |
| December | 22.7°C13.9°C | 13.9°C | 55 | 13.2 | 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
- Isiolo in SeptemberKenya · 35 kmHigh 29.2°C · Low 17.2°C · 27 mm rain
- Nanyuki in SeptemberKenya · 65 kmHigh 21.6°C · Low 12.3°C · 41 mm rain
- Nyeri in SeptemberKenya · 94 kmHigh 20.4°C · Low 10.9°C · 46 mm rain
- Karuri (Murang'A), Kenya in SeptemberKenya · 98 kmHigh 25.3°C · Low 14.5°C · 27 mm rain
- Thika in SeptemberKenya · 137 kmHigh 24.7°C · Low 13.7°C · 23 mm rain
- Ruiru in SeptemberKenya · 154 kmHigh 24.3°C · Low 13.2°C · 9.5 mm rain
- Mwala in SeptemberKenya · 157 kmHigh 26.0°C · Low 15.2°C · 2.6 mm rain
- Naivasha in SeptemberKenya · 160 kmHigh 21.1°C · Low 12.0°C · 53 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 Meru) is explained once on the Meru year overview and on the Sources, method and limits page.