Climate averages 1991–2020
Windhoek weather
in September.
A warm, very dry month: the 6th warmest and the 5th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Windhoek: daytime highs average 27.9°C and nights cool to about 11.6°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 5.2 mm of rain on roughly 1 day, which makes September a very dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 57 min on an average September day.
The nearest other city in this atlas is Walvis Bay (268 km away). In September its highs average 18.2°C, 9.7°C cooler than Windhoek, with almost no rain (under 1 mm).
Among the 3 cities listed in Namibia, Windhoek ranks 2nd of 3 for the warmest September highs and 3rd of 3 for the driest September (rainfall, lowest first). The mean September high of those 3 cities is 26.3°C; Windhoek is 1.6°C warmer than that mean.
From September to October, average highs rise by 2.1°C to 30.0°C, and monthly rainfall rises from 5.2 mm to 13 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
Windhoek climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.2°C17.3°C | 17.3°C | 131 | 12.8 | 13.313 h |
| February | 28.1°C16.8°C | 16.8°C | 145 | 13.1 | 12.913 h |
| March | 27.0°C15.8°C | 15.8°C | 89 | 11.7 | 12.212 h |
| April | 25.4°C13.4°C | 13.4°C | 29 | 4.8 | 11.612 h |
| May | 23.3°C10.3°C | 10.3°C | 3.7 | 0.6 | 11.011 h |
| June | 20.8°C6.9°C | 6.9°C | 0.4 | 0.1 | 10.811 h |
| July | 20.6°C6.0°C | 6.0°C | 0.4 | 0.1 | 10.911 h |
| August | 23.9°C8.2°C | 8.2°C | 0.3 | 0.1 | 11.311 h |
| September, selected | 27.9°C11.6°C | 11.6°C | 5.2 | 1.1 | 11.912 h |
| October | 30.0°C14.5°C | 14.5°C | 13 | 3.4 | 12.613 h |
| November | 30.3°C15.5°C | 15.5°C | 34 | 5.8 | 13.213 h |
| December | 30.5°C16.7°C | 16.7°C | 64 | 7.9 | 13.513 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
- Walvis Bay in SeptemberNamibia · 268 kmHigh 18.2°C · Low 11.1°C · 0.7 mm rain
- Rundu in SeptemberNamibia · 587 kmHigh 32.8°C · Low 17.2°C · 1.1 mm rain
- Ondjiva in SeptemberAngola · 627 kmHigh 33.8°C · Low 17.8°C · 1.8 mm rain
- Maun in SeptemberBotswana · 716 kmHigh 32.6°C · Low 15.9°C · 2.8 mm rain
- Cahama in SeptemberAngola · 756 kmHigh 34.0°C · Low 16.3°C · 2.5 mm rain
- Upington in SeptemberSouth Africa · 777 kmHigh 27.2°C · Low 11.2°C · 4.9 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 Windhoek) is explained once on the Windhoek year overview and on the Sources, method and limits page.