September weather forecastSienes, Spain
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Sienes, Spain, with an average temperature fluctuating between 21.8°C (71.2°F) and 10.3°C (50.5°F).Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 26.6°C (79.9°F) in August to an agreeable 21.8°C (71.2°F). In September, Sienes reports a consistent average low-temperature of 10.3°C (50.5°F) during the nights.Humidity
The average relative humidity in September is 61%.Rainfall
In Sienes, in September, it is raining for 10.3 days, with typically 31mm (1.22") of accumulated precipitation. Throughout the year, there are 124.2 rainfall days, and 389mm (15.31") of precipitation is accumulated.Snowfall
In Sienes, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 28min.On the first day of September in Sienes, sunrise is at 07:37 and sunset at 20:43. On the last day of the month, sunrise is at 08:06 and sunset at 19:54 CEST.
Sunshine
The average sunshine in September in Sienes is 9.4h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sienes, Spain
- Average high temperature in September: 21.8°C
The warmest month (with the highest average high temperature) is August (26.6°C).
The month with the lowest average high temperature is January (6°C).
- Average low temperature in September: 10.3°C
The month with the highest average low temperature is August (13.5°C).
The coldest months (with the lowest average low temperature) are January and February (-0.5°C).
Average pressure in September
Sienes, Spain
- Average pressure in September: 1018mbar
The month with the highest atmospheric pressure is December (1022.9mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Sienes, Spain
- Average wind speed in September: 9.3km/h
The windiest month (with the highest average wind speed) is February (16.3km/h).
The calmest months (with the lowest average wind speed) are July and August (9.2km/h).
Average humidity in September
Sienes, Spain
- Average humidity in September: 61%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Sienes, Spain
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is June (53mm).
The driest month (with the least rainfall) is December (16mm).
Average rainfall days in September
Sienes, Spain
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is April (15.9 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Sienes, Spain
- Average snowfall in September: 0mm
The month with the highest snowfall is January (78mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Sienes, Spain
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sienes, Spain
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Sienes, Spain
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in September
Sienes, Spain
- Average UV index in September: 4
The month with the highest UV index is 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
Sienes, Spain
- Average cloud cover in September: 22
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Sienes, Spain
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, May, October, November and December (9km).
