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
The arrival of September introduces a minor uplift in high-temperatures, adjusting from an agreeable 21.9°C (71.4°F) in August to a warm 25.2°C (77.4°F). Groenvlei registers a pronounced decline from daytime peak temperatures, averaging a cool 11.3°C (52.3°F) lows in September.Humidity
In Groenvlei, the average relative humidity in September is 45%.Rainfall
In September, in Groenvlei, the rain falls for 7 days. Throughout September, 15mm (0.59") of precipitation is accumulated. Throughout the year, in Groenvlei, there are 148.2 rainfall days, and 490mm (19.29") of precipitation is accumulated.Daylight
In September, the average length of the day in Groenvlei is 11h and 56min.On the first day of September in Groenvlei, sunrise is at 06:11 and sunset at 17:46. On the last day of the month, sunrise is at 05:38 and sunset at 17:59 SAST.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Groenvlei is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Groenvlei?
What is the average humidity in September in Groenvlei?
How much does it rain in Groenvlei in September?
How many hours of daylight does Groenvlei have in September?
When are sunrise and sunset in September in Groenvlei?
How many hours of sunshine does Groenvlei have in September?
What is the UV index reading in September in Groenvlei?
Average temperature in September
Groenvlei, South Africa
- Average high temperature in September: 25.2°C
The warmest month (with the highest average high temperature) is December (27.2°C).
The month with the lowest average high temperature is June (18.5°C).
- Average low temperature in September: 11.3°C
The month with the highest average low temperature is December (14.9°C).
The coldest month (with the lowest average low temperature) is July (5.3°C).
Average pressure in September
Groenvlei, South Africa
- Average pressure in September: 1019.4mbar
The month with the highest atmospheric pressure is July (1024.5mbar).
The month with the lowest atmospheric pressure is December (1014.8mbar).
Average wind speed in September
Groenvlei, South Africa
- Average wind speed in September: 10.3km/h
The windiest month (with the highest average wind speed) is September (10.3km/h).
The calmest month (with the lowest average wind speed) is March (7.1km/h).
Average humidity in September
Groenvlei, South Africa
- Average humidity in September: 45%
The month with the highest relative humidity is February (75%).
The month with the lowest relative humidity is August (44%).
Average rainfall in September
Groenvlei, South Africa
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is December (94mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Groenvlei, South Africa
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is December (23.7 days).
The month with the least rainy days is July (2.3 days).
Average daylight in September /
Average sunshine in September
Groenvlei, South Africa
- 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 24min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are October and November (Average sunshine: 11h and 12min).
The month with the least sunshine is April (Average sunshine: 7h and 6min).
Average sunshine days in September
Groenvlei, South Africa
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is December (3.4 days).
Average UV index in September
Groenvlei, South Africa
- Average UV index in September: 5
The months with the highest UV index are January, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in September
Groenvlei, South Africa
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are June and July (Cloud cover 9).
Average visibility in September
Groenvlei, South Africa
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February and March (8km).
