September weather forecastStjärnsund, Sweden
September
Weather in September
The first month of the autumn, September, is still a mild month in Stjärnsund, Sweden, with an average temperature varying between 15.3°C (59.5°F) and 7.6°C (45.7°F).Temperature
The arrival of September correlates with a minor temperature reduction, down from August's agreeable 20.1°C (68.2°F) to a moderate 15.3°C (59.5°F). During September, the nighttime temperature in Stjärnsund averages to a chilly 7.6°C (45.7°F).Humidity
In September, the average relative humidity is 80%.Rainfall
In September, the rain falls for 13.1 days. Throughout September, 29mm (1.14") of precipitation is accumulated. In Stjärnsund, during the entire year, the rain falls for 133.6 days and collects up to 408mm (16.06") of precipitation.Snowfall
June through September are months without snowfall in Stjärnsund.Daylight
The average length of the day in September is 12h and 53min.On the first day of September, sunrise is at 05:50 and sunset at 19:59. On the last day of the month, sunrise is at 06:59 and sunset at 18:30 CEST.
Sunshine
In Stjärnsund, the average sunshine in September is 7.3h.UV index
In Stjärnsund, Sweden, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Stjärnsund, Sweden
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (21.6°C).
The month with the lowest average high temperature is January (-2.5°C).
- Average low temperature in September: 7.6°C
The month with the highest average low temperature is July (11.7°C).
The coldest months (with the lowest average low temperature) are January and February (-6°C).
Average pressure in September
Stjärnsund, Sweden
- Average pressure in September: 1012.8mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1007mbar).
Average wind speed in September
Stjärnsund, Sweden
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is December (10.9km/h).
The calmest month (with the lowest average wind speed) is August (9.1km/h).
Average humidity in September
Stjärnsund, Sweden
- Average humidity in September: 80%
The month with the highest relative humidity is February (92%).
The months with the lowest relative humidity are May and June (67%).
Average rainfall in September
Stjärnsund, Sweden
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is May (47mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Stjärnsund, Sweden
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Stjärnsund, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is March (201mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Stjärnsund, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Stjärnsund, Sweden
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 7h and 18min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in September
Stjärnsund, Sweden
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is September (14.7 days).
The month with the least sunshine days is February (9.2 days).
Average UV index in September
Stjärnsund, 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
Stjärnsund, Sweden
- Average cloud cover in September: 52
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 46).
Average visibility in September
Stjärnsund, Sweden
- Average visibility in September: 8km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (6km).
