Climate Insights for Sumbawanga

The climate in Sumbawanga is warm and mild. The average annual temperature is 18°C and approximately 1674mm of precipitation falls per year. December is the wettest month, receiving around 327mm 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 10°C to 26°C. The warmest month is October, when average highs reach 26°C and the mean temperature sits around 21°C. July is the coolest month, with minimum temperatures around 10°C and an average of 16°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.

Sumbawanga is a fairly wet location, receiving approximately 1674mm of precipitation annually, which averages out to around 140mm per month. The wettest month is December, averaging 327mm of rainfall. January and March also tend to see above-average precipitation. The driest month is July, with just 1mm. That's 326mm less than December, 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 7km/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 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in January, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 9km/h in winter, 8km/h in spring, 5km/h in summer, 7km/h in autumn.

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 26°C, while the coldest stretch bottoms out in July near 10°C. Spring is next, beginning on September 23, 2026 (9 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 18°C with modest rainfall averaging 16mm 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.