Climate averages 1991–2020
Isiolo weather
in May.
A hot, moderately wet month: the 5th warmest and the 8th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Isiolo: daytime highs average 28.9°C and nights cool to about 18.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 47 mm of rain on roughly 8 days, which makes May a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 08 min on an average May day.
The nearest other city in this atlas is Meru (35 km away). In May its highs average 23.7°C, 5.1°C cooler than Isiolo, with 37 mm of rain.
Among the 37 cities listed in Kenya, Isiolo ranks 5th of 37 for the warmest May highs and 6th of 37 for the driest May (rainfall, lowest first). The mean May high of those 37 cities is 25.2°C; Isiolo is 3.7°C warmer than that mean.
From May to June, average highs fall by 0.8°C to 28.0°C, and monthly rainfall falls from 47 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
Isiolo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 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, selected | 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
May in nearby cities
- Meru in MayKenya · 35 kmHigh 23.7°C · Low 15.6°C · 37 mm rain
- Nanyuki in MayKenya · 69 kmHigh 21.6°C · Low 13.7°C · 199 mm rain
- Nyeri in MayKenya · 111 kmHigh 20.5°C · Low 13.2°C · 158 mm rain
- Karuri (Murang'A), Kenya in MayKenya · 125 kmHigh 23.8°C · Low 15.8°C · 135 mm rain
- Thika in MayKenya · 165 kmHigh 23.4°C · Low 15.1°C · 136 mm rain
- Naivasha in MayKenya · 175 kmHigh 21.0°C · Low 13.8°C · 130 mm rain
- Ruiru in MayKenya · 181 kmHigh 23.2°C · Low 14.8°C · 74 mm rain
- Nakuru in MayKenya · 183 kmHigh 23.3°C · Low 13.3°C · 68 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.