Climate averages 1991–2020
Garissa weather
in September.
A hot, very dry month: the 8th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Garissa: daytime highs average 32.6°C and nights cool to about 22.1°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 4.6 mm of rain on fewer than one day, which makes September a very dry month (the 5th 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 Meru (228 km away). In September its highs average 24.6°C, 8.0°C cooler than Garissa, with 10 mm of rain.
Among the 37 cities listed in Kenya, Garissa ranks 4th of 37 for the warmest September highs and 4th of 37 for the driest September (rainfall, lowest first). The mean September high of those 37 cities is 25.7°C; Garissa is 6.8°C warmer than that mean.
From September to October, average highs rise by 1.0°C to 33.6°C, and monthly rainfall rises from 4.6 mm to 16 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
Garissa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 34.4°C23.8°C | 23.8°C | 17 | 1.9 | 12.112 h |
| February | 35.5°C24.2°C | 24.2°C | 3.8 | 0.9 | 12.112 h |
| March | 35.6°C25.1°C | 25.1°C | 20 | 3.6 | 12.112 h |
| April | 34.4°C24.9°C | 24.9°C | 36 | 7.9 | 12.112 h |
| May | 33.2°C24.0°C | 24.0°C | 16 | 3.1 | 12.112 h |
| June | 32.1°C22.8°C | 22.8°C | 2.1 | 0.4 | 12.112 h |
| July | 31.2°C21.8°C | 21.8°C | 2.0 | 0.3 | 12.112 h |
| August | 31.5°C21.6°C | 21.6°C | 2.4 | 0.2 | 12.112 h |
| September, selected | 32.6°C22.1°C | 22.1°C | 4.6 | 0.8 | 12.112 h |
| October | 33.6°C23.2°C | 23.2°C | 16 | 3.6 | 12.112 h |
| November | 32.4°C23.7°C | 23.7°C | 67 | 11.8 | 12.112 h |
| December | 32.8°C23.7°C | 23.7°C | 42 | 7.6 | 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
- Meru in SeptemberKenya · 228 kmHigh 24.6°C · Low 14.2°C · 10 mm rain
- Isiolo in SeptemberKenya · 246 kmHigh 29.2°C · Low 17.2°C · 27 mm rain
- Wajir in SeptemberKenya · 249 kmHigh 32.7°C · Low 22.2°C · 2.6 mm rain
- Kaambooni in SeptemberSomalia · 253 kmHigh 29.0°C · Low 23.7°C · 26 mm rain
- Mwala in SeptemberKenya · 263 kmHigh 26.0°C · Low 15.2°C · 2.6 mm rain
- Karuri (Murang'A), Kenya in SeptemberKenya · 275 kmHigh 25.3°C · Low 14.5°C · 27 mm rain
- Nanyuki in SeptemberKenya · 291 kmHigh 21.6°C · Low 12.3°C · 41 mm rain
- Thika in SeptemberKenya · 294 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 Garissa) is explained once on the Garissa year overview and on the Sources, method and limits page.