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
September
Weather in September
Temperature
September's advent presents an average high-temperature of a still pleasant 21.9°C (71.4°F), indicating a slight variation from the conditions of the previous month. In September, Umkomaas experiences an average nighttime temperature of 16°C (60.8°F).Humidity
In Umkomaas, the average relative humidity in September is 74%.Rainfall
In Umkomaas, in September, during 13.8 rainfall days, 31mm (1.22") of precipitation is typically accumulated. In Umkomaas, South Africa, during the entire year, the rain falls for 177.7 days and collects up to 573mm (22.56") of precipitation.Sea temperature
In Umkomaas, South Africa, the average seawater temperature in September is 22.1°C (71.8°F).Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.1°C (71.8°F) water may be enjoyable. (FYI: The official water temperature required for the Olympic swimming competition is 25°C (77°F) to 28°C (82.4°F).)
Daylight
In Umkomaas, South Africa, the average length of the day in September is 11h and 55min.On the first day of the month, sunrise is at 06:11 and sunset at 17:41. On the last day of September, sunrise is at 05:35 and sunset at 17:57 SAST.
Sunshine
In Umkomaas, the average sunshine in September is 6.8h.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 unsafe exposure to UV radiation for average individuals.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be vigilant - Suggestions to stave off sun damage are provided. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Umkomaas?
What is the average humidity in September in Umkomaas?
How much does it rain in Umkomaas in September?
How warm is the water in September in Umkomaas?
What is the average length of the day in September in Umkomaas?
What time are sunrise and sunset in September in Umkomaas?
How many hours of sunshine does Umkomaas have in September?
What is the UV index reading in September in Umkomaas?
Average temperature in September
Umkomaas, South Africa
- Average high temperature in September: 21.9°C
The warmest month (with the highest average high temperature) is February (26.2°C).
The month with the lowest average high temperature is July (20.9°C).
- Average low temperature in September: 16°C
The month with the highest average low temperature is February (20.6°C).
The coldest month (with the lowest average low temperature) is July (14.3°C).
Average pressure in September
Umkomaas, South Africa
- Average pressure in September: 1018.9mbar
The month with the highest atmospheric pressure is July (1023.1mbar).
The month with the lowest atmospheric pressure is January (1014.2mbar).
Average wind speed in September
Umkomaas, South Africa
- Average wind speed in September: 15.5km/h
The windiest month (with the highest average wind speed) is October (16.6km/h).
The calmest month (with the lowest average wind speed) is May (12.8km/h).
Average humidity in September
Umkomaas, South Africa
- Average humidity in September: 74%
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is June (63%).
Average rainfall in September
Umkomaas, South Africa
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is November (80mm).
The driest month (with the least rainfall) is June (12mm).
Average rainfall days in September
Umkomaas, South Africa
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is June (6.1 days).
Average sea temperature in September
Umkomaas, South Africa
- Average sea temperature in September: 22.1°C
The best month for swimming (with the highest average sea temperature) is February (26.3°C).
The coldest month (with the lowest average sea temperature) is August (21.2°C).
Average daylight in September /
Average sunshine in September
Umkomaas, South Africa
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 6min).
The month with the shortest days is June (Average daylight: 10h and 12min).
- Average sunshine in September: 6h and 5min
The month with the most sunshine is February (Average sunshine: 8h and 36min).
The month with the least sunshine is April (Average sunshine: 5h and 54min).
Average sunshine days in September
Umkomaas, South Africa
- Average sunshine days in September: 12.2 days
The month with the most sunshine days is June (21.3 days).
The month with the least sunshine days is December (5.7 days).
Average UV index in September
Umkomaas, South Africa
- Average UV index in September: 5
The months with the highest UV index are January, February, March and December (UV index 6).
The month with the lowest UV index is October (UV index 4).
Average cloud cover in September
Umkomaas, South Africa
- Average cloud cover in September: 41
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Umkomaas, South Africa
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August and September (10km).
The months with the lowest visibility are January, October, November and December (9km).
