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
On the advent of September, Grassy Park's average high-temperature exhibits a minor adjustment to a still enjoyable 18°C (64.4°F) from August's 16.6°C (61.9°F). In Grassy Park, the September nights cool down to an average low of 10.9°C (51.6°F).Humidity
The months with the highest humidity in Grassy Park are June, August and September, with an average relative humidity of 74%.Rainfall
In September, in Grassy Park, South Africa, the rain falls for 11.7 days. Throughout September, 37mm (1.46") of precipitation is accumulated. Throughout the year, there are 111 rainfall days, and 435mm (17.13") of precipitation is accumulated.Daylight
The average length of the day in September in Grassy Park is 11h and 53min.On the first day of the month, sunrise is at 07:03 and sunset at 18:28. On the last day of September, sunrise is at 06:23 and sunset at 18:48 SAST.
Sunshine
In September, the average sunshine 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 reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the temperature in September in Grassy Park?
What are the most humid months in Grassy Park?
What is the average humidity in September in Grassy Park?
How much does it rain in Grassy Park in September?
How many hours of daylight does Grassy Park have in September?
What time are sunrise and sunset in September in Grassy Park?
How long on average sun shines in September in Grassy Park?
What are the months with the lowest UV index in Grassy Park?
How high is the UV index in September in Grassy Park?
Average temperature in September
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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
Grassy Park, 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).
Grassy Park, South Africa
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