Climate averages 1991–2020
Ruiru weather
in May.
A warm, moderately wet month: the 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Ruiru: daytime highs average 23.2°C and nights cool to about 14.8°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 74 mm of rain on roughly 15 days, which makes May a moderately wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 04 min on an average May day.
The nearest other city in this atlas is Thika (17 km away). In May its highs average 23.4°C, about as warm as Ruiru, with 136 mm of rain.
Among the 37 cities listed in Kenya, Ruiru ranks joint 26th of 37 for the warmest May highs and 9th of 37 for the driest May (rainfall, lowest first). The mean May high of those 37 cities is 25.2°C; Ruiru is 2.0°C cooler than that mean.
From May to June, average highs fall by 1.0°C to 22.2°C, and monthly rainfall falls from 74 mm to 28 mm.
The annual picture
May 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
Ruiru climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.1°C13.6°C | 13.6°C | 30 | 6.8 | 12.212 h |
| February | 26.6°C14.1°C | 14.1°C | 21 | 5.1 | 12.112 h |
| March | 26.4°C15.1°C | 15.1°C | 58 | 12.7 | 12.112 h |
| April | 24.3°C15.7°C | 15.7°C | 120 | 22.0 | 12.112 h |
| May, selected | 23.2°C14.8°C | 14.8°C | 74 | 15.1 | 12.112 h |
| June | 22.2°C13.4°C | 13.4°C | 28 | 5.7 | 12.112 h |
| July | 21.7°C12.3°C | 12.3°C | 8.5 | 2.0 | 12.112 h |
| August | 22.2°C12.6°C | 12.6°C | 12 | 2.6 | 12.112 h |
| September | 24.3°C13.2°C | 13.2°C | 9.5 | 2.1 | 12.112 h |
| October | 24.9°C14.6°C | 14.6°C | 44 | 9.6 | 12.112 h |
| November | 22.9°C14.8°C | 14.8°C | 123 | 21.1 | 12.212 h |
| December | 23.5°C14.0°C | 14.0°C | 57 | 13.7 | 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
May in nearby cities
- Thika in MayKenya · 17 kmHigh 23.4°C · Low 15.1°C · 136 mm rain
- Nairobi in MayKenya · 22 kmHigh 23.2°C · Low 14.9°C · 92 mm rain
- Karuri (Kiambu County), Kenya in MayKenya · 23 kmHigh 21.4°C · Low 13.4°C · 92 mm rain
- Mlolongo in MayKenya · 28 kmHigh 23.3°C · Low 15.2°C · 80 mm rain
- Kikuyu in MayKenya · 35 kmHigh 21.0°C · Low 13.1°C · 92 mm rain
- Ongata Rongai in MayKenya · 35 kmHigh 22.8°C · Low 14.7°C · 82 mm rain
- Limuru in MayKenya · 36 kmHigh 19.6°C · Low 11.7°C · 132 mm rain
- Kitengela in MayKenya · 37 kmHigh 23.4°C · Low 15.5°C · 80 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 Ruiru) is explained once on the Ruiru year overview and on the Sources, method and limits page.