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
September
Weather in September
Temperature
A shift in the average high-temperature occurs in September, reducing from 28.5°C (83.3°F) in August to a still moderately hot 23.3°C (73.9°F). During the nights in September, Portes-en-Valdaine experiences a consistent average temperature of 12.2°C (54°F).Humidity
In Portes-en-Valdaine, the average relative humidity in September is 69%.Rainfall
In Portes-en-Valdaine, during September, the rain falls for 7 days and regularly aggregates up to 19mm (0.75") of precipitation. In Portes-en-Valdaine, during the entire year, the rain falls for 111.4 days and collects up to 380mm (14.96") of precipitation.Snowfall
April through November are months without snowfall.Daylight
In Portes-en-Valdaine, the average length of the day in September is 12h and 31min.On the first day of September in Portes-en-Valdaine, sunrise is at 07:03 and sunset at 20:16. On the last day of the month, sunrise is at 07:37 and sunset at 19:22 CEST.
Sunshine
The average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Portes-en-Valdaine in September?
What is the average humidity in September in Portes-en-Valdaine?
How much does it rain in Portes-en-Valdaine in September?
When it does not snow in Portes-en-Valdaine?
What is the average length of the day in September in Portes-en-Valdaine?
When is the sunrise / sunset in September in Portes-en-Valdaine?
How long on average sun shines in September in Portes-en-Valdaine?
How high is the UV index in September in Portes-en-Valdaine?
Average temperature in September
Portes-en-Valdaine, France
- Average high temperature in September: 23.3°C
The warmest month (with the highest average high temperature) is July (28.8°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 12.2°C
The months with the highest average low temperature are July and August (15.5°C).
The coldest month (with the lowest average low temperature) is February (0.8°C).
Average pressure in September
Portes-en-Valdaine, France
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1020.7mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Portes-en-Valdaine, France
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is May (11.9km/h).
The calmest month (with the lowest average wind speed) is November (9.5km/h).
Average humidity in September
Portes-en-Valdaine, France
- Average humidity in September: 69%
The month with the highest relative humidity is November (83%).
The months with the lowest relative humidity are July and August (62%).
Average rainfall in September
Portes-en-Valdaine, France
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is November (83mm).
The driest month (with the least rainfall) is July (16mm).
Average rainfall days in September
Portes-en-Valdaine, France
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is November (12.5 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in September
Portes-en-Valdaine, France
- Average snowfall in September: 0mm
The month with the highest snowfall is January (7mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Portes-en-Valdaine, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and November (0 days).
Average daylight in September /
Average sunshine in September
Portes-en-Valdaine, France
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is November (Average sunshine: 5h and 42min).
Average sunshine days in September
Portes-en-Valdaine, France
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is August (22.7 days).
The month with the least sunshine days is November (15.6 days).
Average UV index in September
Portes-en-Valdaine, France
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Portes-en-Valdaine, France
- Average cloud cover in September: 21
The month with the most cloud cover is November (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Portes-en-Valdaine, France
- Average visibility in September: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (9km).
