September weather forecastRjukan, Norway
September
Weather in September
September, the first month of the autumn in Rjukan, is still a cool month, with an average temperature fluctuating between 10.3°C (50.5°F) and 3°C (37.4°F).Temperature
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a refreshing 14.2°C (57.6°F) in August to a cool 10.3°C (50.5°F). Rjukan records an average nighttime low of 3°C (37.4°F) in September.Humidity
In September, the average relative humidity is 83%.Rainfall
In Rjukan, during September, the rain falls for 13.2 days and regularly aggregates up to 46mm (1.81") of precipitation. Throughout the year, in Rjukan, there are 114.7 rainfall days, and 585mm (23.03") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Rjukan, Norway. September is the first month it typically snows. Throughout September, in the average 0.8 snowfall days, it receives 23mm (0.91") of snow. In Rjukan, during the entire year, snow falls for 118.3 days and aggregates up to 2354mm (92.68") of snow.Daylight
In Rjukan, Norway, the average length of the day in September is 12h and 52min.On the first day of September in Rjukan, sunrise is at 06:22 and sunset at 20:28. On the last day of the month, sunrise is at 07:29 and sunset at 19:00 CEST.
Sunshine
In September, the average sunshine in Rjukan is 6.9h.UV index
In Rjukan, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in September transforms into the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rjukan, Norway
- Average high temperature in September: 10.3°C
The warmest month (with the highest average high temperature) is July (15.8°C).
The month with the lowest average high temperature is January (-5.6°C).
- Average low temperature in September: 3°C
The month with the highest average low temperature is July (7°C).
The coldest month (with the lowest average low temperature) is January (-11°C).
Average pressure in September
Rjukan, Norway
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is April (1014.8mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in September
Rjukan, Norway
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is December (11.8km/h).
The calmest month (with the lowest average wind speed) is August (9.3km/h).
Average humidity in September
Rjukan, Norway
- Average humidity in September: 83%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is June (72%).
Average rainfall in September
Rjukan, Norway
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is November (65mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in September
Rjukan, Norway
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is August (17.5 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Rjukan, Norway
- Average snowfall in September: 23mm
The month with the highest snowfall is November (442mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Rjukan, Norway
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is December (18.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Rjukan, Norway
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 6h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 36min).
Average sunshine days in September
Rjukan, Norway
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is May (14.2 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in September
Rjukan, Norway
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, October, November and December (UV index 1).
Average cloud cover in September
Rjukan, Norway
- Average cloud cover in September: 54
The months with the most cloud cover are February and November (Cloud cover 63).
The month with the least cloud cover is June (Cloud cover 45).
Average visibility in September
Rjukan, Norway
- Average visibility in September: 8km
The month with the highest visibility is June (9km).
The months with the lowest visibility are January, February, March and November (6km).
