Climate Insights for Isiolo

The climate in Isiolo is warm and mild. The average annual temperature is 24°C and approximately 213mm of precipitation falls per year. April is the wettest month, receiving around 66mm of rainfall. Isiolo sits near the equator, so seasonal temperature differences are minimal throughout the year.

Isiolo sees moderate temperature variation throughout the year, ranging from 18°C to 32°C. The warmest month is March, when average highs reach 32°C and the mean temperature sits around 25°C. January is the coolest month, with minimum temperatures around 18°C and an average of 24°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs.

Isiolo is a quite dry location, receiving approximately 213mm of precipitation annually, which averages out to around 18mm per month. The wettest month is April, averaging 66mm of rainfall. November and May also tend to see above-average precipitation. The driest month is September, with just 2mm. That's 65mm less than April, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Isiolo is mildly breezy, with an average annual wind speed of 14km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently spring in Isiolo, which began on March 20, 2026. Isiolo sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in March at around 32°C, while the coldest stretch bottoms out in January near 18°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Isiolo is during January, February, April, May, June, July, August, September, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 19mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 32°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Isiolo based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.