Climate Insights for Sumbawanga

The climate in Sumbawanga is warm and mild. The average annual temperature is 20°C and approximately 1369mm of precipitation falls per year. January is the wettest month, receiving around 271mm of rainfall. Sumbawanga sits near the equator, so seasonal temperature differences are minimal throughout the year.

Sumbawanga sees moderate temperature variation throughout the year, ranging from 12°C to 27°C. The warmest month is October, when average highs reach 27°C and the mean temperature sits around 22°C. July is the coolest month, with minimum temperatures around 12°C and an average of 18°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.

Sumbawanga is a fairly wet location, receiving approximately 1369mm of precipitation annually, which averages out to around 114mm per month. The wettest month is January, averaging 271mm of rainfall. December and March also tend to see above-average precipitation. The driest month is June, with just 1mm. That's 270mm less than January, 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.

Sumbawanga is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently winter in Sumbawanga, which began on June 21, 2026. Sumbawanga sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in October at around 27°C, while the coldest stretch bottoms out in July near 12°C. Spring is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Sumbawanga is during May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 14mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Sumbawanga 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.