September weather forecastViken, Sweden
September
Weather in September
September, the first month of the autumn in Viken, is still a refreshing month, with an average temperature varying between 16.5°C (61.7°F) and 13°C (55.4°F).Temperature
Transition into September subtly marks a drop in the average high-temperature, moderately moving from an enjoyable 19.9°C (67.8°F) in August to a still comfortable 16.5°C (61.7°F). Viken maintains an average of approximately a mild 13°C (55.4°F) during September nights, with only a minimal decrease from the daytime temperature.Humidity
In Viken, the average relative humidity in September is 78%.Rainfall
In Viken, during September, the rain falls for 14.3 days and regularly aggregates up to 29mm (1.14") of precipitation. In Viken, during the entire year, the rain falls for 160.1 days and collects up to 338mm (13.31") of precipitation.Snowfall
June through October are months without snowfall in Viken.Daylight
The average length of the day in September in Viken is 12h and 45min.On the first day of the month, sunrise is at 06:14 and sunset at 20:04. On the last day of September, sunrise is at 07:11 and sunset at 18:47 CEST.
Sunshine
The average sunshine in September is 7.6h.UV index
In Viken, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Viken, Sweden
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is August (19.9°C).
The month with the lowest average high temperature is February (2.3°C).
- Average low temperature in September: 13°C
The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is February (-0.2°C).
Average pressure in September
Viken, Sweden
- Average pressure in September: 1014.9mbar
The month with the highest atmospheric pressure is April (1015.4mbar).
The month with the lowest atmospheric pressure is December (1010.5mbar).
Average wind speed in September
Viken, Sweden
- Average wind speed in September: 19.5km/h
The windiest month (with the highest average wind speed) is December (23.6km/h).
The calmest months (with the lowest average wind speed) are May and June (16.5km/h).
Average humidity in September
Viken, Sweden
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are April and May (74%).
Average rainfall in September
Viken, Sweden
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is August (46mm).
The driest month (with the least rainfall) is April (14mm).
Average rainfall days in September
Viken, Sweden
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is August (18.2 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in September
Viken, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (37mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Viken, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Viken, Sweden
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 30min).
The month with the shortest days is December (Average daylight: 7h and 0min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Viken, Sweden
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is April (16.1 days).
The month with the least sunshine days is December (8.7 days).
Average UV index in September
Viken, Sweden
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Viken, Sweden
- Average cloud cover in September: 48
The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is June (Cloud cover 38).
Average visibility in September
Viken, Sweden
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
