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 beginning of September signals a minor rise in the average high-temperature, moving from a warm 24.8°C (76.6°F) in August to a still moderately hot 28.9°C (84°F). September nights present a stark temperature decrease to a moderate 13.6°C (56.5°F).Humidity
In September, the average relative humidity is 20%.Rainfall
Months with rainfall are January through June, September through December. September is the first month it rains. Throughout September, in the average 1.2 rainfall days, it receives 1mm (0.04") of precipitation. Throughout the year, there are 38.2 rainfall days, and 98mm (3.86") of precipitation is accumulated.Daylight
In September, the average length of the day is 11h and 58min.On the first day of September, sunrise is at 06:59 and sunset at 18:37. On the last day of the month, sunrise is at 06:28 and sunset at 18:47 CAT.
Sunshine
In Mariental, the average sunshine in September is 9.8h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 6 in September translates into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
When does it start raining in Mariental?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Mariental have in September?
How high is the UV index in September?
Average temperature in September
Mariental, Namibia
- Average high temperature in September: 28.9°C
The warmest months (with the highest average high temperature) are January and December (33.6°C).
The month with the lowest average high temperature is July (21.3°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is January (23.7°C).
The coldest month (with the lowest average low temperature) is July (8°C).
Average pressure in September
Mariental, Namibia
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is July (1022.2mbar).
The month with the lowest atmospheric pressure is January (1010mbar).
Average wind speed in September
Mariental, Namibia
- Average wind speed in September: 14.6km/h
The windiest month (with the highest average wind speed) is October (15.4km/h).
The calmest month (with the lowest average wind speed) is March (13km/h).
Average humidity in September
Mariental, Namibia
- Average humidity in September: 20%
The months with the highest relative humidity are February and April (34%).
The month with the lowest relative humidity is October (18%).
Average rainfall in September
Mariental, Namibia
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is February (28mm).
The driest months (with the least rainfall) are July and August (0mm).
Average rainfall days in September
Mariental, Namibia
- Average rainfall days in September: 1.2 days
The month with the highest number of rainy days is February (8.8 days).
The month with the least rainy days is June (0.3 days).
Average daylight in September /
Average sunshine in September
Mariental, Namibia
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 36min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is November (Average sunshine: 11h and 48min).
The month with the least sunshine is April (Average sunshine: 9h and 36min).
Average sunshine days in September
Mariental, Namibia
- Average sunshine days in September: 28.4 days
The month with the most sunshine days is July (30.4 days).
The month with the least sunshine days is February (18.1 days).
Average UV index in September
Mariental, Namibia
- Average UV index in September: 6
The months with the highest UV index are January, February, November and December (UV index 7).
The month with the lowest UV index is July (UV index 4).
Average cloud cover in September
Mariental, Namibia
- Average cloud cover in September: 7
The month with the most cloud cover is February (Cloud cover 16).
The months with the least cloud cover are June, July and August (Cloud cover 3).
Average visibility in September
Mariental, 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).
Mariental, Namibia
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