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 sea temperature 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
Gansbaai observes a minor difference in average high-temperatures between August's 16.2°C (61.2°F) and September's 17.3°C (63.1°F). Gansbaai observes an average nighttime temperature of 12.2°C (54°F) during September.Humidity
January through March, May, September and October, with an average relative humidity of 76%, are the most humid months.Rainfall
In Gansbaai, South Africa, in September, during 7.5 rainfall days, 15mm (0.59") of precipitation is typically accumulated. In Gansbaai, during the entire year, the rain falls for 113.9 days and collects up to 270mm (10.63") of precipitation.Sea temperature
July through September, with an average sea temperature of 15.8°C (60.4°F), are months with the coldest seawater.Note: Most people do not enjoy swimming in water of 15.8°C (60.4°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Gansbaai, South Africa, the average length of the day in September is 11h and 53min.On the first day of the month, sunrise is at 07:00 and sunset at 18:24. On the last day of September, sunrise is at 06:19 and sunset at 18:45 SAST.
Sunshine
In September, the average sunshine in Gansbaai is 8.2h.UV index
The months with the lowest UV index in Gansbaai, South Africa, are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What is the average September temperature in Gansbaai?
What are the most humid months in Gansbaai?
What is the average humidity in September in Gansbaai?
How many days does it rain in September in Gansbaai?
When is the sea coldest in Gansbaai?
What is the sea temperature in September in Gansbaai?
What is the average length of the day in September in Gansbaai?
When are sunrise and sunset in September in Gansbaai?
How many hours of sunshine does Gansbaai have in September?
What is the month with the lowest UV index in Gansbaai?
What is the UV index intensity in September in Gansbaai?
Average temperature in September
Gansbaai, South Africa
- Average high temperature in September: 17.3°C
The warmest month (with the highest average high temperature) is February (23.3°C).
The month with the lowest average high temperature is August (16.2°C).
- Average low temperature in September: 12.2°C
The month with the highest average low temperature is February (18.3°C).
The coldest month (with the lowest average low temperature) is August (11.5°C).
Average pressure in September
Gansbaai, South Africa
- Average pressure in September: 1019.4mbar
The month with the highest atmospheric pressure is July (1021.8mbar).
The month with the lowest atmospheric pressure is February (1013.8mbar).
Average wind speed in September
Gansbaai, South Africa
- Average wind speed in September: 20.3km/h
The windiest month (with the highest average wind speed) is November (21.5km/h).
The calmest month (with the lowest average wind speed) is May (17.7km/h).
Average humidity in September
Gansbaai, South Africa
- Average humidity in September: 76%
The months with the highest relative humidity are January, February, March, May, September and October (76%).
The months with the lowest relative humidity are April, June and July (74%).
Average rainfall in September
Gansbaai, South Africa
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is June (47mm).
The driest months (with the least rainfall) are February and December (13mm).
Average rainfall days in September
Gansbaai, South Africa
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is October (7.1 days).
Average sea temperature in September
Gansbaai, South Africa
- Average sea temperature in September: 15.8°C
The best month for swimming (with the highest average sea temperature) is January (20.7°C).
The coldest months (with the lowest average sea temperature) are July, August and September (15.8°C).
Average daylight in September /
Average sunshine in September
Gansbaai, 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 1min
The month with the most sunshine is December (Average sunshine: 10h and 24min).
The month with the least sunshine is June (Average sunshine: 6h and 12min).
Average sunshine days in September
Gansbaai, South Africa
- Average sunshine days in September: 20 days
The month with the most sunshine days is October (22 days).
The month with the least sunshine days is February (13.9 days).
Average UV index in September
Gansbaai, South Africa
- Average UV index in September: 4
The months with the highest UV index are January and February (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
Gansbaai, South Africa
- Average cloud cover in September: 32
The months with the most cloud cover are March and October (Cloud cover 33).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Gansbaai, 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).
Gansbaai, South Africa
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