Climate averages 1991–2020
Mwanza weather
in September.
A warm, wet month: the joint 3rd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Mwanza: daytime highs average 25.7°C and nights cool to about 20.9°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 104 mm of rain on roughly 15 days, which makes September a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 06 min on an average September day.
The nearest other city in this atlas is Sengerema (32 km away). In September its highs average 27.9°C, 2.2°C warmer than Mwanza, with 66 mm of rain.
Among the 43 cities listed in Tanzania, Mwanza ranks 35th of 43 for the warmest September highs and 42nd of 43 for the driest September (rainfall, lowest first). The mean September high of those 43 cities is 28.0°C; Mwanza is 2.2°C cooler than that mean.
From September to October, average highs fall by 0.7°C to 25.1°C, and monthly rainfall rises from 104 mm to 211 mm.
The annual picture
September 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
Mwanza climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.0°C20.9°C | 20.9°C | 159 | 22.3 | 12.212 h |
| February | 25.9°C21.4°C | 21.4°C | 116 | 15.8 | 12.212 h |
| March | 25.9°C21.4°C | 21.4°C | 181 | 19.2 | 12.112 h |
| April | 25.4°C21.0°C | 21.0°C | 195 | 20.0 | 12.112 h |
| May | 25.7°C21.0°C | 21.0°C | 88 | 12.6 | 12.012 h |
| June | 25.7°C20.5°C | 20.5°C | 33 | 6.2 | 12.012 h |
| July | 25.5°C19.9°C | 19.9°C | 12 | 2.7 | 12.012 h |
| August | 25.5°C20.3°C | 20.3°C | 53 | 8.3 | 12.012 h |
| September, selected | 25.7°C20.9°C | 20.9°C | 104 | 15.4 | 12.112 h |
| October | 25.1°C20.8°C | 20.8°C | 211 | 24.4 | 12.212 h |
| November | 24.4°C20.7°C | 20.7°C | 266 | 26.0 | 12.212 h |
| December | 24.5°C20.6°C | 20.6°C | 224 | 25.7 | 12.312 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
September in nearby cities
- Sengerema in SeptemberTanzania · 32 kmHigh 27.9°C · Low 18.0°C · 66 mm rain
- Geita in SeptemberTanzania · 84 kmHigh 28.4°C · Low 18.0°C · 81 mm rain
- Katoro in SeptemberTanzania · 120 kmHigh 28.1°C · Low 18.3°C · 73 mm rain
- Bunda in SeptemberTanzania · 121 kmHigh 29.0°C · Low 18.6°C · 56 mm rain
- Bariadi in SeptemberTanzania · 124 kmHigh 30.3°C · Low 18.5°C · 20 mm rain
- Shinyanga in SeptemberTanzania · 140 kmHigh 31.7°C · Low 19.5°C · 4.1 mm rain
- Kahama in SeptemberTanzania · 150 kmHigh 30.4°C · Low 19.1°C · 13 mm rain
- Ushirombo in SeptemberTanzania · 150 kmHigh 30.4°C · Low 18.8°C · 24 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 Mwanza) is explained once on the Mwanza year overview and on the Sources, method and limits page.