Climate averages 1991–2020
Ruiru weather
in January.
A warm, fairly dry month: the 3rd warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
January is a warm month in Ruiru: daytime highs average 25.1°C and nights cool to about 13.6°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 30 mm of rain on roughly 7 days, which makes January a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 11 min on an average January day.
The nearest other city in this atlas is Thika (17 km away). In January its highs average 25.1°C, about as warm as Ruiru, with 41 mm of rain.
Among the 37 cities listed in Kenya, Ruiru ranks joint 23rd of 37 for the warmest January highs and 14th of 37 for the driest January (rainfall, lowest first). The mean January high of those 37 cities is 27.3°C; Ruiru is 2.1°C cooler than that mean.
From January to February, average highs rise by 1.5°C to 26.6°C, and monthly rainfall falls from 30 mm to 21 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Thika in JanuaryKenya · 17 kmHigh 25.1°C · Low 14.2°C · 41 mm rain
- Nairobi in JanuaryKenya · 22 kmHigh 25.6°C · Low 14.4°C · 35 mm rain
- Karuri (Kiambu County), Kenya in JanuaryKenya · 23 kmHigh 23.6°C · Low 12.8°C · 35 mm rain
- Mlolongo in JanuaryKenya · 28 kmHigh 25.4°C · Low 14.8°C · 41 mm rain
- Kikuyu in JanuaryKenya · 35 kmHigh 23.6°C · Low 12.6°C · 35 mm rain
- Ongata Rongai in JanuaryKenya · 35 kmHigh 25.1°C · Low 14.6°C · 31 mm rain
- Limuru in JanuaryKenya · 36 kmHigh 22.4°C · Low 10.8°C · 45 mm rain
- Kitengela in JanuaryKenya · 37 kmHigh 25.4°C · Low 15.1°C · 41 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.