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
September's climate shows a minor adjustment in average high-temperatures to a still moderately hot 25.9°C (78.6°F) from August's 23.8°C (74.8°F). A noticeable temperature swing characterizes Grand Valley Estate's September nights, dipping to an average of 13.6°C (56.5°F).Humidity
The average relative humidity in September is 59%.Rainfall
In Grand Valley Estate, in September, during 8.7 rainfall days, 18mm (0.71") of precipitation is typically accumulated. In Grand Valley Estate, during the entire year, the rain falls for 156.8 days and collects up to 549mm (21.61") of precipitation.Daylight
In September, the average length of the day in Grand Valley Estate is 11h and 56min.On the first day of September, sunrise is at 06:07 and sunset at 17:42. On the last day of the month, sunrise is at 05:34 and sunset at 17:54 SAST.
Sunshine
In September, the average sunshine is 7.9h.UV index
The months with the lowest UV index are April through October, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Grand Valley Estate in September?
What is the average humidity in September?
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 many hours of sunshine does Grand Valley Estate have in September?
What is the month with the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Grand Valley Estate, Swaziland
- Average high temperature in September: 25.9°C
The warmest month (with the highest average high temperature) is December (27.5°C).
The month with the lowest average high temperature is July (21.4°C).
- Average low temperature in September: 13.6°C
The month with the highest average low temperature is December (17.5°C).
The coldest month (with the lowest average low temperature) is July (9.3°C).
Average pressure in September
Grand Valley Estate, Swaziland
- Average pressure in September: 1019.2mbar
The month with the highest atmospheric pressure is July (1024.1mbar).
The month with the lowest atmospheric pressure is January (1014mbar).
Average wind speed in September
Grand Valley Estate, Swaziland
- Average wind speed in September: 8.2km/h
The windiest month (with the highest average wind speed) is September (8.2km/h).
The calmest month (with the lowest average wind speed) is March (6.1km/h).
Average humidity in September
Grand Valley Estate, Swaziland
- Average humidity in September: 59%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is August (57%).
Average rainfall in September
Grand Valley Estate, Swaziland
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is December (110mm).
The driest month (with the least rainfall) is July (4mm).
Average rainfall days in September
Grand Valley Estate, Swaziland
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is December (22.7 days).
The month with the least rainy days is June (3.6 days).
Average daylight in September /
Average sunshine in September
Grand Valley Estate, Swaziland
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 13h and 48min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is November (Average sunshine: 9h and 0min).
The month with the least sunshine is April (Average sunshine: 6h and 24min).
Average sunshine days in September
Grand Valley Estate, Swaziland
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is June (25.4 days).
The month with the least sunshine days is December (5.3 days).
Average UV index in September
Grand Valley Estate, Swaziland
- Average UV index in September: 5
The months with the highest UV index are January, February, March, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July, August, September and October (UV index 5).
Average cloud cover in September
Grand Valley Estate, Swaziland
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is June (Cloud cover 14).
Average visibility in September
Grand Valley Estate, Swaziland
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February and March (7km).
