Climate averages 1991–2020
Isiolo weather
in January.
A hot, moderately wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Isiolo: daytime highs average 28.1°C and nights cool to about 16.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 41 mm of rain on roughly 8 days, which makes January a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average January day.
The nearest other city in this atlas is Meru (35 km away). In January its highs average 24.1°C, 3.9°C cooler than Isiolo, with 39 mm of rain.
Among the 37 cities listed in Kenya, Isiolo ranks 13th of 37 for the warmest January highs and joint 22nd of 37 for the driest January (rainfall, lowest first). The mean January high of those 37 cities is 27.3°C; Isiolo is 0.8°C warmer than that mean.
From January to February, average highs rise by 1.3°C to 29.4°C, and monthly rainfall falls from 41 mm to 23 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
Isiolo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 28.1°C16.6°C | 16.6°C | 41 | 8.2 | 12.112 h |
| February | 29.4°C17.2°C | 17.2°C | 23 | 4.9 | 12.112 h |
| March | 29.5°C18.1°C | 18.1°C | 43 | 8.6 | 12.112 h |
| April | 28.7°C18.8°C | 18.8°C | 76 | 11.2 | 12.112 h |
| May | 28.9°C18.5°C | 18.5°C | 47 | 7.5 | 12.112 h |
| June | 28.0°C17.4°C | 17.4°C | 28 | 5.6 | 12.112 h |
| July | 27.2°C16.7°C | 16.7°C | 38 | 7.8 | 12.112 h |
| August | 27.7°C16.7°C | 16.7°C | 40 | 9.0 | 12.112 h |
| September | 29.2°C17.2°C | 17.2°C | 27 | 5.7 | 12.112 h |
| October | 29.0°C18.3°C | 18.3°C | 52 | 10.0 | 12.112 h |
| November | 26.2°C17.6°C | 17.6°C | 99 | 19.8 | 12.112 h |
| December | 26.7°C16.6°C | 16.6°C | 55 | 13.3 | 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
January in nearby cities
- Meru in JanuaryKenya · 35 kmHigh 24.1°C · Low 13.9°C · 39 mm rain
- Nanyuki in JanuaryKenya · 69 kmHigh 22.5°C · Low 11.4°C · 45 mm rain
- Nyeri in JanuaryKenya · 111 kmHigh 22.6°C · Low 10.9°C · 110 mm rain
- Karuri (Murang'A), Kenya in JanuaryKenya · 125 kmHigh 26.1°C · Low 13.5°C · 26 mm rain
- Thika in JanuaryKenya · 165 kmHigh 25.1°C · Low 14.2°C · 41 mm rain
- Naivasha in JanuaryKenya · 175 kmHigh 23.7°C · Low 13.0°C · 82 mm rain
- Ruiru in JanuaryKenya · 181 kmHigh 25.1°C · Low 13.6°C · 30 mm rain
- Nakuru in JanuaryKenya · 183 kmHigh 24.7°C · Low 13.2°C · 19 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 Isiolo) is explained once on the Isiolo year overview and on the Sources, method and limits page.