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
The coming of September brings a minor shift in Irene's weather, with average high-temperatures adjusting from August's pleasant 21.9°C (71.4°F) to a warm 26.3°C (79.3°F). A noticeable temperature swing characterizes Irene's September nights, dipping to an average of 12.4°C (54.3°F).Humidity
The least humid month is September, with an average relative humidity of 35%.Rainfall
In September, in Irene, the rain falls for 3.9 days. Throughout September, 8mm (0.31") of precipitation is accumulated. Throughout the year, there are 125.6 rainfall days, and 446mm (17.56") of precipitation is accumulated.Daylight
In Irene, South Africa, the average length of the day in September is 11h and 57min.On the first day of the month, sunrise is at 06:18 and sunset at 17:55. On the last day of September, in Irene, sunrise is at 05:47 and sunset at 18:06 SAST.
Sunshine
In Irene, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: An average UV index of 5 in September transforms into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
What are the temperatures in Irene in September?
What is the least humid month in Irene?
What is the average humidity in September in Irene?
How many days does it rain in September in Irene?
What is the average length of the day in September in Irene?
When are sunrise and sunset in September in Irene?
How long on average sun shines in September in Irene?
What is the UV index reading in September in Irene?
Average temperature in September
Irene, South Africa
- Average high temperature in September: 26.3°C
The warmest month (with the highest average high temperature) is January (28.1°C).
The month with the lowest average high temperature is July (18.5°C).
- Average low temperature in September: 12.4°C
The months with the highest average low temperature are January and December (17.1°C).
The coldest month (with the lowest average low temperature) is July (6.8°C).
Average pressure in September
Irene, South Africa
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is July (1024.6mbar).
The month with the lowest atmospheric pressure is January (1013.1mbar).
Average wind speed in September
Irene, South Africa
- Average wind speed in September: 10.7km/h
The windiest months (with the highest average wind speed) are October and November (11.2km/h).
The calmest month (with the lowest average wind speed) is May (7.5km/h).
Average humidity in September
Irene, South Africa
- Average humidity in September: 35%
The months with the highest relative humidity are January and February (63%).
The month with the lowest relative humidity is September (35%).
Average rainfall in September
Irene, South Africa
- Average rainfall in September: 8mm
The wettest month (with the highest rainfall) is January (97mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Irene, South Africa
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is January (21.8 days).
The month with the least rainy days is July (1.2 days).
Average daylight in September /
Average sunshine in September
Irene, South Africa
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is October (Average sunshine: 11h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 30min).
Average sunshine days in September
Irene, South Africa
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is August (29.2 days).
The month with the least sunshine days is December (6.1 days).
Average UV index in September
Irene, South Africa
- Average UV index in September: 5
The months with the highest UV index are January, February, March, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in September
Irene, South Africa
- Average cloud cover in September: 9
The month with the most cloud cover is January (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Irene, South Africa
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Irene, South Africa
Weather forecast for your location
2. Allow the app to use your location
