September weather forecastMercenac, France
September
Weather in September
September, the first month of the autumn in Mercenac, is still a comfortable month, with an average temperature varying between 18°C (64.4°F) and 7.5°C (45.5°F).Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a pleasant 21.7°C (71.1°F) in August to a comfortable 18°C (64.4°F). An average low-temperature of 7.5°C (45.5°F) marks the month of September in Mercenac.Humidity
The average relative humidity in September in Mercenac is 73%.Rainfall
In Mercenac, in September, it is raining for 12.8 days, with typically 45mm (1.77") of accumulated precipitation. In Mercenac, France, during the entire year, the rain falls for 149.7 days and collects up to 817mm (32.17") of precipitation.Snowfall
January through June, August through December are months with snowfall in Mercenac, France. In Mercenac, in September, during 0.4 snowfall days, 20mm (0.79") of snow is typically accumulated. In Mercenac, during the entire year, snow falls for 90.2 days and aggregates up to 2798mm (110.16") of snow.Daylight
In Mercenac, France, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 07:20 and sunset at 20:30. On the last day of September, in Mercenac, sunrise is at 07:52 and sunset at 19:38 CEST.
Sunshine
The average sunshine in September in Mercenac is 9.4h.UV index
The average daily maximum UV index in September in Mercenac is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mercenac, France
- Average high temperature in September: 18°C
The warmest months (with the highest average high temperature) are July and August (21.7°C).
The month with the lowest average high temperature is February (3.2°C).
- Average low temperature in September: 7.5°C
The month with the highest average low temperature is August (10.5°C).
The coldest month (with the lowest average low temperature) is February (-4.3°C).
Average pressure in September
Mercenac, France
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1021.7mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Mercenac, France
- Average wind speed in September: 5.7km/h
The windiest month (with the highest average wind speed) is February (8.8km/h).
The calmest month (with the lowest average wind speed) is August (5.6km/h).
Average humidity in September
Mercenac, France
- Average humidity in September: 73%
The months with the highest relative humidity are February and March (81%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
Mercenac, France
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is May (94mm).
The driest month (with the least rainfall) is February (43mm).
Average rainfall days in September
Mercenac, France
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in September
Mercenac, France
- Average snowfall in September: 20mm
The month with the highest snowfall is January (479mm).
The month with the least snowfall is July (0mm).
Average snowfall days in September
Mercenac, France
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is January (15.3 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Mercenac, France
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is November (Average sunshine: 6h and 24min).
Average sunshine days in September
Mercenac, France
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is October (17.1 days).
The month with the least sunshine days is June (6.9 days).
Average UV index in September
Mercenac, France
- Average UV index in September: 4
The month with the highest UV index is 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
Mercenac, France
- Average cloud cover in September: 22
The month with the most cloud cover is April (Cloud cover 38).
The months with the least cloud cover are July, August and September (Cloud cover 22).
Average visibility in September
Mercenac, France
- Average visibility in September: 9km
The months with the highest visibility are February, March, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and April (8km).
