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
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from an agreeable 22.8°C (73°F) in August to a comfortable 18.3°C (64.9°F). Throughout the nights in September, Saint-Jean-de-Moirans experiences an average low-temperature of 8.5°C (47.3°F).Humidity
The average relative humidity in September is 81%.Rainfall
September is the month with the least rainfall in Saint-Jean-de-Moirans. Rain falls for 10.3 days and accumulates 20mm (0.79") of precipitation.Snowfall
June through September are months without snowfall in Saint-Jean-de-Moirans.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 06:59 and sunset at 20:15. On the last day of September, in Saint-Jean-de-Moirans, sunrise is at 07:35 and sunset at 19:19 CEST.
Sunshine
In Saint-Jean-de-Moirans, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during September leads to these advisories:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the temperature in September in Saint-Jean-de-Moirans?
What is the average humidity in September in Saint-Jean-de-Moirans?
What is the driest month in Saint-Jean-de-Moirans?
How many days does it rain in September in Saint-Jean-de-Moirans?
When it does not snow in Saint-Jean-de-Moirans?
Does it snow in Saint-Jean-de-Moirans in September?
How many hours of daylight does Saint-Jean-de-Moirans have in September?
When are sunrise and sunset in September in Saint-Jean-de-Moirans?
How long on average sun shines in September in Saint-Jean-de-Moirans?
How high is the UV index in September in Saint-Jean-de-Moirans?
Average temperature in September
Saint-Jean-de-Moirans, France
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is August (22.8°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (12.1°C).
The coldest months (with the lowest average low temperature) are January and February (-2.8°C).
Average pressure in September
Saint-Jean-de-Moirans, France
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Saint-Jean-de-Moirans, France
- Average wind speed in September: 7.7km/h
The windiest month (with the highest average wind speed) is February (10.2km/h).
The calmest month (with the lowest average wind speed) is September (7.7km/h).
Average humidity in September
Saint-Jean-de-Moirans, France
- Average humidity in September: 81%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Saint-Jean-de-Moirans, France
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is June (47mm).
The driest month (with the least rainfall) is September (20mm).
Average rainfall days in September
Saint-Jean-de-Moirans, France
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Saint-Jean-de-Moirans, France
- Average snowfall in September: 0mm
The month with the highest snowfall is February (153mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Saint-Jean-de-Moirans, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint-Jean-de-Moirans, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in September
Saint-Jean-de-Moirans, France
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is December (17.4 days).
The month with the least sunshine days is June (12 days).
Average UV index in September
Saint-Jean-de-Moirans, France
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Saint-Jean-de-Moirans, France
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Saint-Jean-de-Moirans, France
- Average visibility in September: 8km
The month with the highest visibility is August (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (8km).
Saint-Jean-de-Moirans, France
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