Climate Insights for Isiolo

The climate in Isiolo is warm and mild. The average annual temperature is 23°C and approximately 541mm of precipitation falls per year. April is the wettest month, receiving around 137mm 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 17°C to 30°C. The warmest month is March, when average highs reach 30°C and the mean temperature sits around 24°C. January is the coolest month, with minimum temperatures around 17°C and an average of 22°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.

Isiolo is a relatively dry area, receiving approximately 541mm of precipitation annually, which averages out to around 45mm per month. The wettest month is April, averaging 137mm of rainfall. November and December also tend to see above-average precipitation. The driest month is July, with just 6mm. That's 130mm 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 relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 2km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently summer in Isiolo, which began on June 21, 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 30°C, while the coldest stretch bottoms out in January near 17°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

The best time to visit Isiolo is during January, February, March, May, June, July, August, September, October and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 30mm per month. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

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.