September weather forecastFinnhällan, Sweden
September
Weather in September
The first month of the autumn, September, is still a mild month in Finnhällan, Sweden, with an average temperature varying between 13.3°C (55.9°F) and 7.4°C (45.3°F).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a comfortable 18.2°C (64.8°F) in August to a moderate 13.3°C (55.9°F). Finnhällan, in September, observes a steady average low-temperature of 7.4°C (45.3°F).Humidity
In Finnhällan, the average relative humidity in September is 79%.Rainfall
In Finnhällan, in September, it is raining for 10.8 days, with typically 20mm (0.79") of accumulated precipitation. In Finnhällan, during the entire year, the rain falls for 99.9 days and collects up to 252mm (9.92") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 13h and 3min.On the first day of September in Finnhällan, sunrise is at 05:16 and sunset at 19:52. On the last day of the month, sunrise is at 06:43 and sunset at 18:06 CEST.
Sunshine
In Finnhällan, the average sunshine in September is 7.6h.UV index
In Finnhällan, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Finnhällan, Sweden
- Average high temperature in September: 13.3°C
The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is January (-4.8°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is February (-9.3°C).
Average pressure in September
Finnhällan, Sweden
- Average pressure in September: 1011.2mbar
The month with the highest atmospheric pressure is May (1014.1mbar).
The month with the lowest atmospheric pressure is December (1005mbar).
Average wind speed in September
Finnhällan, Sweden
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is December (14.6km/h).
The calmest month (with the lowest average wind speed) is July (11.2km/h).
Average humidity in September
Finnhällan, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is June (65%).
Average rainfall in September
Finnhällan, Sweden
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is July (30mm).
The driest month (with the least rainfall) is February (14mm).
Average rainfall days in September
Finnhällan, Sweden
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is July (11.9 days).
The month with the least rainy days is January (3 days).
Average snowfall in September
Finnhällan, Sweden
- Average snowfall in September: 0mm
The months with the highest snowfall are January and March (107mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Finnhällan, Sweden
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Finnhällan, Sweden
- Average daylight in September: 13h and 6min
The month with the longest days is June (Average daylight: 21h and 24min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is July (Average sunshine: 12h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in September
Finnhällan, Sweden
- Average sunshine days in September: 17.1 days
The months with the most sunshine days are June and October (17.8 days).
The month with the least sunshine days is December (12.9 days).
Average UV index in September
Finnhällan, Sweden
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Finnhällan, Sweden
- Average cloud cover in September: 46
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Finnhällan, Sweden
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February and March (7km).
