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
September's onset brings an average high-temperature of a still comfortable 18°C (64.4°F), showing a minute difference from August's 16.6°C (61.9°F). Heideveld's temperature tends to fall to an average low of 10.9°C (51.6°F) during the nights of September.Humidity
The months with the highest humidity are June, August and September, with an average relative humidity of 74%.Rainfall
In September, the rain falls for 11.7 days. Throughout September, 37mm (1.46") of precipitation is accumulated. In Heideveld, during the entire year, the rain falls for 111 days and collects up to 435mm (17.13") of precipitation.Daylight
In September, the average length of the day in Heideveld is 11h and 53min.On the first day of September, sunrise is at 07:03 and sunset at 18:28. On the last day of the month, sunrise is at 06:23 and sunset at 18:48 SAST.
Sunshine
The average sunshine in September is 8h.UV index
The months with the lowest UV index are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Take precautions - Protection against sunburn is recommended. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
What are the temperatures in Heideveld in September?
What is the most humid month in Heideveld?
What is the average humidity in September in Heideveld?
How much does it rain in Heideveld in September?
How many hours of daylight does Heideveld have in September?
When is the sunrise / sunset in September in Heideveld?
How long on average sun shines in September in Heideveld?
When is the lowest UV index in Heideveld?
How high is the UV index in September in Heideveld?
Average temperature in September
Heideveld, South Africa
- Average high temperature in September: 18°C
The warmest month (with the highest average high temperature) is February (26.1°C).
The month with the lowest average high temperature is August (16.6°C).
- Average low temperature in September: 10.9°C
The month with the highest average low temperature is January (17.7°C).
The coldest months (with the lowest average low temperature) are July and August (10.2°C).
Average pressure in September
Heideveld, South Africa
- Average pressure in September: 1019.6mbar
The month with the highest atmospheric pressure is July (1022mbar).
The month with the lowest atmospheric pressure is February (1013.4mbar).
Average wind speed in September
Heideveld, South Africa
- Average wind speed in September: 15km/h
The windiest month (with the highest average wind speed) is January (17.6km/h).
The calmest month (with the lowest average wind speed) is May (13.4km/h).
Average humidity in September
Heideveld, South Africa
- Average humidity in September: 74%
The months with the highest relative humidity are June, August and September (74%).
The months with the lowest relative humidity are February, April and December (68%).
Average rainfall in September
Heideveld, South Africa
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is June (98mm).
The driest month (with the least rainfall) is February (7mm).
Average rainfall days in September
Heideveld, South Africa
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (4.9 days).
Average daylight in September /
Average sunshine in September
Heideveld, 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 0min
The month with the most sunshine is December (Average sunshine: 11h and 6min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).
Average sunshine days in September
Heideveld, South Africa
- Average sunshine days in September: 16 days
The month with the most sunshine days is January (23.1 days).
The month with the least sunshine days is June (14.6 days).
Average UV index in September
Heideveld, South Africa
- Average UV index in September: 4
The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).
Average cloud cover in September
Heideveld, South Africa
- Average cloud cover in September: 33
The month with the most cloud cover is June (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 15).
Average visibility in September
Heideveld, 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).
Heideveld, South Africa
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