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
Grand Valley Estate marks the start of September with an average high-temperature of a still warm 25.9°C (78.6°F), hinting at a slight fluctuation from August's 23.8°C (74.8°F). Grand Valley Estate observes a distinct decrease from peak daytime temperatures, with an average low-temperature of 13.6°C (56.5°F) throughout the month of September.Humidity
The average relative humidity in September in Grand Valley Estate, Swaziland, is 59%.Rainfall
In Grand Valley Estate, in September, it is raining for 8.7 days, with typically 18mm (0.71") of accumulated precipitation. 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
The average length of the day in September is 11h and 56min.On the first day of the month, sunrise is at 06:07 and sunset at 17:42. On the last day of September, in Grand Valley Estate, Swaziland, 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 in Grand Valley Estate are April through October, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What is the usual temperature for Grand Valley Estate in September?
What is the average humidity in September in Grand Valley Estate?
How many days does it rain in September in Grand Valley Estate?
What is the average length of the day in September in Grand Valley Estate?
What time are sunrise and sunset in September in Grand Valley Estate?
How many hours of sunshine does Grand Valley Estate have in September?
When is the lowest UV index in Grand Valley Estate?
How high is the UV index in September in Grand Valley Estate?
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).
Grand Valley Estate, Swaziland
Weather forecast for your location
2. Allow the app to use your location
