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
September
Weather in September
Temperature
As August gives way to September, the average high-temperature displays a slight ascent, adjusting from a pleasant 22.9°C (73.2°F) to a moderately hot 26.5°C (79.7°F). In Grunau, September nights witness a remarkable decline from the day's zenith to a cool 12.6°C (54.7°F).Humidity
In Grunau, the average relative humidity in September is 31%.Rainfall
The months with the least rainfall are June through September Rain falls for 1.5 days and accumulates 1mm (0.04") of rain.Daylight
In September, the average length of the day is 11h and 56min.On the first day of the month, sunrise is at 06:59 and sunset at 18:33. On the last day of September, sunrise is at 06:25 and sunset at 18:46 CAT.
Sunshine
In September, the average sunshine is 9.9h.UV index
In September, the average daily maximum UV index in Grunau is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Shield from overexposure. Defense against sun-related harm is required. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Grunau, Namibia
- Average high temperature in September: 26.5°C
The warmest month (with the highest average high temperature) is January (34.4°C).
The month with the lowest average high temperature is June (20.8°C).
- Average low temperature in September: 12.6°C
The month with the highest average low temperature is February (21.3°C).
The coldest month (with the lowest average low temperature) is July (9.1°C).
Average pressure in September
Grunau, Namibia
- Average pressure in September: 1017.7mbar
The month with the highest atmospheric pressure is July (1021.9mbar).
The months with the lowest atmospheric pressure are January and February (1011.2mbar).
Average wind speed in September
Grunau, Namibia
- Average wind speed in September: 10.8km/h
The windiest month (with the highest average wind speed) is December (12.2km/h).
The calmest month (with the lowest average wind speed) is May (9.7km/h).
Average humidity in September
Grunau, Namibia
- Average humidity in September: 31%
The month with the highest relative humidity is June (41%).
The month with the lowest relative humidity is November (29%).
Average rainfall in September
Grunau, Namibia
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is February (14mm).
The driest months (with the least rainfall) are June, July, August and September (1mm).
Average rainfall days in September
Grunau, Namibia
- Average rainfall days in September: 1.5 days
The month with the highest number of rainy days is February (5.7 days).
The month with the least rainy days is November (0.9 days).
Average daylight in September /
Average sunshine in September
Grunau, Namibia
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 13h and 54min).
The month with the shortest days is June (Average daylight: 10h and 24min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is December (Average sunshine: 12h and 12min).
The months with the least sunshine are April, May and June (Average sunshine: 9h and 36min).
Average sunshine days in September
Grunau, Namibia
- Average sunshine days in September: 27.7 days
The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is February (20.3 days).
Average UV index in September
Grunau, Namibia
- Average UV index in September: 6
The months with the highest UV index are January, February, March, November and December (UV index 7).
The months with the lowest UV index are May, June, July and August (UV index 5).
Average cloud cover in September
Grunau, Namibia
- Average cloud cover in September: 7
The months with the most cloud cover are February and April (Cloud cover 9).
The months with the least cloud cover are July, August and December (Cloud cover 5).
Average visibility in September
Grunau, 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).
