September weather forecastHeiligenstein, France
September
Weather in September
September, the first month of the autumn in Heiligenstein, is also an agreeable month, with an average temperature ranging between min 10°C (50°F) and max 20.5°C (68.9°F).Temperature
With the arrival of September, Heiligenstein experiences a modest decline in average high-temperatures, transitioning from a moderately hot 24.9°C (76.8°F) in August to a pleasant 20.5°C (68.9°F). Throughout September, an average nighttime temperature of 10°C (50°F) is experienced in Heiligenstein.Humidity
In Heiligenstein, the average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 26mm (1.02") of precipitation.Snowfall
In Heiligenstein, snow does not fall in April through September.Daylight
The average length of the day in September in Heiligenstein is 12h and 35min.On the first day of September in Heiligenstein, sunrise is at 06:48 and sunset at 20:11. On the last day of the month, sunrise is at 07:28 and sunset at 19:11 CEST.
Sunshine
The average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Heiligenstein, France
- Average high temperature in September: 20.5°C
The warmest month (with the highest average high temperature) is August (24.9°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 10°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (-0.7°C).
Average pressure in September
Heiligenstein, France
- Average pressure in September: 1018.4mbar
The month with the highest atmospheric pressure is December (1019.8mbar).
The month with the lowest atmospheric pressure is November (1015.2mbar).
Average wind speed in September
Heiligenstein, France
- Average wind speed in September: 7.7km/h
The windiest month (with the highest average wind speed) is February (11km/h).
The calmest month (with the lowest average wind speed) is August (7.4km/h).
Average humidity in September
Heiligenstein, France
- Average humidity in September: 76%
The months with the highest relative humidity are January and December (86%).
The months with the lowest relative humidity are April, July and August (73%).
Average rainfall in September
Heiligenstein, France
- Average rainfall in September: 26mm
The wettest months (with the highest rainfall) are June and July (56mm).
The driest month (with the least rainfall) is September (26mm).
Average rainfall days in September
Heiligenstein, France
- Average rainfall days in September: 10.5 days
The months with the highest number of rainy days are May and July (17.1 days).
The month with the least rainy days is September (10.5 days).
Average snowfall in September
Heiligenstein, France
- Average snowfall in September: 0mm
The month with the highest snowfall is December (40mm).
The months with the least snowfall are April, May, June, July, August and September (0mm).
Average snowfall days in September
Heiligenstein, France
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Heiligenstein, France
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Heiligenstein, France
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is October (17.3 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Heiligenstein, France
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Heiligenstein, France
- Average cloud cover in September: 33
The months with the most cloud cover are January and December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Heiligenstein, France
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and December (8km).
