September weather forecast
Windhoek, Namibia

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The monument of the first president of Namibia near the Lutheran Christ Church in Windhoek, Namibia
The monument of the first president of Namibia near the Lutheran Christ Church in Windhoek, Namibia

Weather in September

September sees Windhoek maintain relatively warm temperatures, with a slight increase from the preceding month. The gradual thawing of the city discerns the onset of the warmer months, though rainfall remains scarce. The limited 2mm (0.08") rainfall received in this month fails to alter the dry conditions considerably. However, this doesn’t deter Windhoek from being a high-traffic tourist destination as the appealing weather sets an inviting stage for outdoor activities. As the city moves toward October, a slight rise in precipitation can be expected.

Temperature

September's onset brings a subtle temperature rise, moving from 23.6°C (74.5°F) in August to a still moderately hot 27.3°C (81.1°F). September nights bring a pronounced temperature shift, with averages hovering around a cool 12.7°C (54.9°F).

Humidity

September and October, with an average relative humidity of 19%, are the least humid months in Windhoek.

Rainfall

January through May, September through December are months with rainfall in Windhoek. September is the first month it rains in Windhoek. Throughout September, in the average 1.6 rainfall days, it receives 2mm (0.08") of precipitation. Throughout the year, in Windhoek, there are 80.2 rainfall days, and 304mm (11.97") of precipitation is accumulated.

Daylight

In Windhoek, the average length of the day in September is 11h and 58min.
On the first day of the month, sunrise is at 07:01 and sunset at 18:41. On the last day of September, in Windhoek, sunrise is at 06:32 and sunset at 18:50 CAT.

Sunshine

In September, the average sunshine in Windhoek is 9.9h.

UV index

In Windhoek, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 5 in September translates into these instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
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Frequently asked questions

What is the usual temperature for Windhoek in September?

In Windhoek, 27.3°C (81.1°F) is the average high-temperature and 12.7°C (54.9°F) is the average low-temperature during September. In February, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is appraised at 28°C (82.4°F).

What are the least humid months in Windhoek?

The months with the lowest humidity in Windhoek, Namibia, are September and October, with an average relative humidity of 19%.

What is the average humidity in September in Windhoek?

In September, the average relative humidity is 19%.

When does it start raining in Windhoek?

September is the first month it rains in Windhoek, Namibia. Throughout September, in the average 1.6 rainfall days, it receives 2mm (0.08") of precipitation.

What is the average length of the day in September in Windhoek?

The average day length in September in Windhoek is 11h and 58min.

What time are sunrise and sunset in September in Windhoek?

On the first day of September, sunrise is at 07:01 and sunset at 18:41. On the last day of the month, sunrise is at 06:32 and sunset at 18:50 CAT.

How many hours of sunshine does Windhoek have in September?

In Windhoek, the average sunshine duration in September is 9.9h.

What is the UV index intensity in September in Windhoek?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Average temperature in September
Windhoek, Namibia

Average temperature in September - Windhoek, Namibia
  • Average high temperature in September: 27.3°C

The warmest months (with the highest average high temperature) are October and November (29.5°C).
The month with the lowest average high temperature is July (19.8°C).

  • Average low temperature in September: 12.7°C

The month with the highest average low temperature is January (18.9°C).
The coldest month (with the lowest average low temperature) is July (6°C).

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Average pressure in September
Windhoek, Namibia

Average pressure in September - Windhoek, Namibia
  • Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is July (1021.3mbar).
The month with the lowest atmospheric pressure is January (1010.7mbar).

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Average wind speed in September
Windhoek, Namibia

Average wind speed in September - Windhoek, Namibia
  • Average wind speed in September: 11.7km/h

The windiest month (with the highest average wind speed) is October (12.6km/h).
The calmest month (with the lowest average wind speed) is March (9.3km/h).

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Average humidity in September
Windhoek, Namibia

Average humidity in September - Windhoek, Namibia
  • Average humidity in September: 19%

The month with the highest relative humidity is March (51%).
The months with the lowest relative humidity are September and October (19%).

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Average rainfall in September
Windhoek, Namibia

Average rainfall in September - Windhoek, Namibia
  • Average rainfall in September: 2mm

The wettest month (with the highest rainfall) is February (102mm).
The driest months (with the least rainfall) are June, July and August (0mm).

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Average rainfall days in September
Windhoek, Namibia

Average rainfall days in September - Windhoek, Namibia
  • Average rainfall days in September: 1.6 days

The month with the highest number of rainy days is February (15.9 days).
The month with the least rainy days is August (0 days).

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Average daylight in September /
Average sunshine in September
Windhoek, Namibia

Average daylight in September / Average sunshine in September - Windhoek, Namibia
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is November (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 9h and 24min).

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Average sunshine days in September
Windhoek, Namibia

Average sunshine days in September - Windhoek, Namibia
  • Average sunshine days in September: 27.9 days

The month with the most sunshine days is July (30.7 days).
The month with the least sunshine days is February (9.8 days).

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Average UV index in September
Windhoek, Namibia

Average UV index in September - Windhoek, Namibia
  • Average UV index in September: 5

The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are June and July (UV index 4).

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Average cloud cover in September
Windhoek, Namibia

Average cloud cover in September - Windhoek, Namibia
  • Average cloud cover in September: 6

The month with the most cloud cover is February (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 1).

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Average visibility in September
Windhoek, Namibia

Average visibility in September - Windhoek, Namibia
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Windhoek, Namibia

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