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 change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 27.3°C (81.1°F) to an agreeable 22.2°C (72°F). Throughout the month of September, the average temperature in Portes-lès-Valence dips to a cool 11.3°C (52.3°F) at night.Humidity
The average relative humidity in September in Portes-lès-Valence, France, is 73%.Rainfall
In Portes-lès-Valence, in September, during 6.6 rainfall days, 17mm (0.67") of precipitation is typically accumulated. Throughout the year, there are 114.3 rainfall days, and 320mm (12.6") of precipitation is accumulated.Snowfall
In Portes-lès-Valence, snow does not fall in April through October.Daylight
In September, the average length of the day in Portes-lès-Valence is 12h and 31min.On the first day of September, sunrise is at 07:03 and sunset at 20:17. On the last day of the month, sunrise is at 07:37 and sunset at 19:22 CEST.
Sunshine
The average sunshine in September in Portes-lès-Valence is 9h.UV index
In Portes-lès-Valence, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, an average UV index of 4 transforms into the following instructions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Portes-lès-Valence?
What is the average humidity in September in Portes-lès-Valence?
How much does it rain in Portes-lès-Valence in September?
When it does not snow in Portes-lès-Valence?
How many hours of daylight does Portes-lès-Valence have in September?
What time are sunrise and sunset in September in Portes-lès-Valence?
How long on average sun shines in September in Portes-lès-Valence?
What is the UV index reading in September in Portes-lès-Valence?
Average temperature in September
Portes-lès-Valence, France
- Average high temperature in September: 22.2°C
The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 11.3°C
The month with the highest average low temperature is July (14.6°C).
The coldest month (with the lowest average low temperature) is February (0.3°C).
Average pressure in September
Portes-lès-Valence, France
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.1mbar).
Average wind speed in September
Portes-lès-Valence, France
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is February (12.9km/h).
The calmest month (with the lowest average wind speed) is September (10km/h).
Average humidity in September
Portes-lès-Valence, France
- Average humidity in September: 73%
The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Portes-lès-Valence, France
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is November (60mm).
The driest month (with the least rainfall) is August (16mm).
Average rainfall days in September
Portes-lès-Valence, France
- Average rainfall days in September: 6.6 days
The months with the highest number of rainy days are April and May (11.7 days).
The month with the least rainy days is September (6.6 days).
Average snowfall in September
Portes-lès-Valence, France
- Average snowfall in September: 0mm
The month with the highest snowfall is November (55mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Portes-lès-Valence, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Portes-lès-Valence, 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 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Portes-lès-Valence, France
- Average sunshine days in September: 21.1 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (15.1 days).
Average UV index in September
Portes-lès-Valence, 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, February, November and December (UV index 2).
Average cloud cover in September
Portes-lès-Valence, France
- Average cloud cover in September: 27
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Portes-lès-Valence, 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).
