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 reports an average high-temperature of a still comfortable 18.5°C (65.3°F), slightly varied from August's 17.8°C (64°F). Throughout September in Riversdale, a steady low-temperature average of 12.5°C (54.5°F) is noted.Humidity
In September, the average relative humidity is 72%.Rainfall
In Riversdale, in September, it is raining for 10.5 days, with typically 22mm (0.87") of accumulated precipitation. In Riversdale, South Africa, during the entire year, the rain falls for 131.2 days and collects up to 289mm (11.38") of precipitation.Daylight
In September, the average length of the day in Riversdale is 11h and 53min.On the first day of September, sunrise is at 06:52 and sunset at 18:17. On the last day of the month, sunrise is at 06:12 and sunset at 18:37 SAST.
Sunshine
In September, the average sunshine in Riversdale is 8.4h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Take precautions - Protection against sun damage is advised. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For excellent sun protection for the eyes, ears, face, and neck, consider 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 Riversdale?
What is the average humidity in September in Riversdale?
How much does it rain in Riversdale in September?
What is the average length of the day in September in Riversdale?
When is the sunrise / sunset in September in Riversdale?
How many hours of sunshine does Riversdale have in September?
What is the UV index reading in September in Riversdale?
Average temperature in September
Riversdale, South Africa
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is February (23.8°C).
The month with the lowest average high temperature is July (17.6°C).
- Average low temperature in September: 12.5°C
The month with the highest average low temperature is February (18.6°C).
The coldest months (with the lowest average low temperature) are July and August (11.8°C).
Average pressure in September
Riversdale, South Africa
- Average pressure in September: 1018.9mbar
The month with the highest atmospheric pressure is July (1021.9mbar).
The month with the lowest atmospheric pressure is February (1013.7mbar).
Average wind speed in September
Riversdale, South Africa
- Average wind speed in September: 15.9km/h
The windiest months (with the highest average wind speed) are October and November (16.8km/h).
The calmest month (with the lowest average wind speed) is May (13.3km/h).
Average humidity in September
Riversdale, South Africa
- Average humidity in September: 72%
The month with the highest relative humidity is February (77%).
The months with the lowest relative humidity are June and July (67%).
Average rainfall in September
Riversdale, South Africa
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is June (38mm).
The driest month (with the least rainfall) is December (13mm).
Average rainfall days in September
Riversdale, South Africa
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is October (12.5 days).
The month with the least rainy days is May (9.2 days).
Average daylight in September /
Average sunshine in September
Riversdale, South Africa
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are January and November (Average sunshine: 10h and 0min).
The months with the least sunshine are June and July (Average sunshine: 6h and 36min).
Average sunshine days in September
Riversdale, South Africa
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is May (18.9 days).
The month with the least sunshine days is February (15 days).
Average UV index in September
Riversdale, South Africa
- Average UV index in September: 5
The months with the highest UV index are February and December (UV index 6).
The months with the lowest UV index are May, June, July and August (UV index 4).
Average cloud cover in September
Riversdale, South Africa
- Average cloud cover in September: 30
The month with the most cloud cover is October (Cloud cover 36).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in September
Riversdale, South Africa
- 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).
