September weather forecastGalluis, France
September
Weather in September
September, the first month of the autumn in Galluis, is still a pleasant month, with an average temperature fluctuating between 20.8°C (69.4°F) and 11.5°C (52.7°F).Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a moderately hot 24.3°C (75.7°F) in August to a pleasant 20.8°C (69.4°F). The low-temperature average for Galluis during September stands at a cool 11.5°C (52.7°F).Humidity
In Galluis, the average relative humidity in September is 73%.Rainfall
The month with the least rainfall in Galluis is September, when the rain falls for 9.6 days and typically collects 15mm (0.59") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 35min.On the first day of September in Galluis, sunrise is at 07:10 and sunset at 20:34. On the last day of the month, sunrise is at 07:51 and sunset at 19:33 CEST.
Sunshine
In Galluis, the average sunshine in September is 7.7h.UV index
The average daily maximum UV index in September in Galluis, France, is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Galluis, France
- Average high temperature in September: 20.8°C
The warmest month (with the highest average high temperature) is August (24.3°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 11.5°C
The months with the highest average low temperature are July and August (14.4°C).
The coldest months (with the lowest average low temperature) are January and February (1.6°C).
Average pressure in September
Galluis, France
- Average pressure in September: 1018.1mbar
The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in September
Galluis, France
- Average wind speed in September: 10.7km/h
The windiest month (with the highest average wind speed) is February (16km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).
Average humidity in September
Galluis, France
- Average humidity in September: 73%
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Galluis, France
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is June (40mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days in September
Galluis, France
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is September (9.6 days).
Average snowfall in September
Galluis, France
- Average snowfall in September: 0mm
The months with the highest snowfall are January, March and December (18mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Galluis, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Galluis, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 7h and 42min
The months with the most sunshine are July and August (Average sunshine: 9h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Galluis, France
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Galluis, France
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Galluis, France
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 38).
Average visibility in September
Galluis, France
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
