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 snowfall in September
- Average snowfall 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
Illiat's weather subtly changes with the onset of September, barely falling from a warm 25.7°C (78.3°F) in August to a pleasant 21.3°C (70.3°F). An average low-temperature of 10.8°C (51.4°F) is noted during the nights in September.Humidity
In Illiat, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 12.2 days and accumulates 40mm (1.57") of precipitation.Snowfall
In Illiat, snow does not fall in April through September.Daylight
In Illiat, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 07:01 and sunset at 20:18. On the last day of September, in Illiat, sunrise is at 07:38 and sunset at 19:22 CEST.
Sunshine
In Illiat, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September in Illiat is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What are the temperatures in Illiat in September?
What is the average humidity in September in Illiat?
What is the driest month in Illiat?
How much does it rain in Illiat in September?
When it does not snow in Illiat?
Does it snow in Illiat in September?
How many hours of daylight does Illiat have in September?
When is the sunrise / sunset in September in Illiat?
How many hours of sunshine does Illiat have in September?
What is the UV index reading in September in Illiat?
Average temperature in September
Illiat, France
- Average high temperature in September: 21.3°C
The warmest month (with the highest average high temperature) is August (25.7°C).
The month with the lowest average high temperature is January (5.5°C).
- Average low temperature in September: 10.8°C
The month with the highest average low temperature is July (14.2°C).
The coldest month (with the lowest average low temperature) is February (0.1°C).
Average pressure in September
Illiat, France
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is December (1021.2mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in September
Illiat, France
- Average wind speed in September: 8km/h
The windiest month (with the highest average wind speed) is February (11.6km/h).
The calmest month (with the lowest average wind speed) is August (7.4km/h).
Average humidity in September
Illiat, France
- Average humidity in September: 78%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Illiat, France
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is November (86mm).
The driest month (with the least rainfall) is September (40mm).
Average rainfall days in September
Illiat, France
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is September (12.2 days).
Average snowfall in September
Illiat, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (48mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Illiat, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Illiat, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Illiat, France
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (14.7 days).
The month with the least sunshine days is May (7.3 days).
Average UV index in September
Illiat, France
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Illiat, France
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Illiat, France
- Average visibility in September: 8km
The months with the highest visibility are March, April, June, July and August (9km).
The months with the lowest visibility are January, February, May, September, October, November and December (8km).
Illiat, France
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