Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September introduces a subtle rise in the average high-temperature, nudging from 30.8°C (87.4°F) in August to a still hot 34.6°C (94.3°F). Onaanda reports a considerable drop from daytime temperatures in September, recording an average nighttime figure of 17.2°C (63°F).Humidity
With an average relative humidity of 18%, September is the least humid month in Onaanda, Namibia.Rainfall
Months with rainfall are January through April, September through December. September is the first month it rains. Throughout September, in the average 0.9 rainfall days, it receives 1mm (0.04") of precipitation. In Onaanda, during the entire year, the rain falls for 100.8 days and collects up to 379mm (14.92") of precipitation.Daylight
In September, the average length of the day in Onaanda is 12h and 0min.On the first day of September, sunrise is at 07:05 and sunset at 18:51. On the last day of the month, sunrise is at 06:40 and sunset at 18:55 CAT.
Sunshine
August and September, with an average of 10h of sunshine, are months with the most sunshine in Onaanda.UV index
January, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 7 in September suggests the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the least humid month?
What is the average humidity in September?
When does it start to rain?
How many hours of daylight does Onaanda have in September?
What time are sunrise and sunset in September?
What is the month with the most sunshine?
How long on average sun shines in September?
What is the month with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Onaanda, Namibia
- Average high temperature in September: 34.6°C
The warmest month (with the highest average high temperature) is October (35.7°C).
The month with the lowest average high temperature is June (26.7°C).
- Average low temperature in September: 17.2°C
The month with the highest average low temperature is November (23.3°C).
The coldest month (with the lowest average low temperature) is July (11.3°C).
Average pressure in September
Onaanda, Namibia
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is July (1018.5mbar).
The month with the lowest atmospheric pressure is December (1009.5mbar).
Average wind speed in September
Onaanda, Namibia
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is July (13.1km/h).
The calmest month (with the lowest average wind speed) is February (9.4km/h).
Average humidity in September
Onaanda, Namibia
- Average humidity in September: 18%
The month with the highest relative humidity is March (55%).
The month with the lowest relative humidity is September (18%).
Average rainfall in September
Onaanda, Namibia
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is January (83mm).
The driest months (with the least rainfall) are May, June, July and August (0mm).
Average rainfall days in September
Onaanda, Namibia
- Average rainfall days in September: 0.9 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is July (0 days).
Average daylight in September /
Average sunshine in September
Onaanda, Namibia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 12min).
The month with the shortest days is June (Average daylight: 11h and 6min).
- Average sunshine in September: 10h and 0min
The months with the most sunshine are August and September (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 9h and 12min).
Average sunshine days in September
Onaanda, Namibia
- Average sunshine days in September: 28.6 days
The month with the most sunshine days is July (31 days).
The month with the least sunshine days is March (10 days).
Average UV index in September
Onaanda, Namibia
- Average UV index in September: 7
The months with the highest UV index are January, September, October, November and December (UV index 7).
The months with the lowest UV index are June and July (UV index 5).
Average cloud cover in September
Onaanda, Namibia
- Average cloud cover in September: 4
The month with the most cloud cover is March (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 1).
Average visibility in September
Onaanda, 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).
Onaanda, Namibia
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