September weather forecastRosendal, Norway
September
Weather in September
The first month of the autumn, September, is also a frosty month in Rosendal, Norway, with an average temperature ranging between min 3.8°C (38.8°F) and max 8.3°C (46.9°F).Temperature
In Rosendal, entering September brings a subtle temperature decrement, reducing from August's fresh 11.6°C (52.9°F) to a chilly 8.3°C (46.9°F). The temperature in Rosendal during September nights demonstrates a small drop from the daytime highs, settling to an average of 3.8°C (38.8°F).Humidity
In September, the average relative humidity is 87%.Rainfall
In Rosendal, in September, it is raining for 19.6 days, with typically 113mm (4.45") of accumulated precipitation. Throughout the year, there are 198.1 rainfall days, and 1530mm (60.24") of precipitation is accumulated.Snowfall
In Rosendal, snow does not fall in June through September.Sea temperature
In Rosendal, the average seawater temperature in September is 14.8°C (58.6°F).Note: Taking a dip in 14.8°C (58.6°F) can be perilous. Submersion in temperatures under 10°C (50°F) triggers severe cold shock accompanied by hyperventilation.
Daylight
In Rosendal, the average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 06:32 and sunset at 20:39. On the last day of September, sunrise is at 07:40 and sunset at 19:11 CEST.
Sunshine
In Rosendal, the average sunshine in September is 4.8h.UV index
The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 during September translates into the following directions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rosendal, Norway
- Average high temperature in September: 8.3°C
The warmest month (with the highest average high temperature) is July (12.6°C).
The month with the lowest average high temperature is January (-4.5°C).
- Average low temperature in September: 3.8°C
The month with the highest average low temperature is July (6.8°C).
The coldest month (with the lowest average low temperature) is February (-10.6°C).
Average pressure in September
Rosendal, Norway
- Average pressure in September: 1012.3mbar
The months with the highest atmospheric pressure are April and May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1006.8mbar).
Average wind speed in September
Rosendal, Norway
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is January (13.3km/h).
The calmest month (with the lowest average wind speed) is July (9.1km/h).
Average humidity in September
Rosendal, Norway
- Average humidity in September: 87%
The month with the highest relative humidity is December (94%).
The month with the lowest relative humidity is June (81%).
Average rainfall in September
Rosendal, Norway
- Average rainfall in September: 113mm
The wettest month (with the highest rainfall) is December (206mm).
The driest month (with the least rainfall) is June (87mm).
Average rainfall days in September
Rosendal, Norway
- Average rainfall days in September: 19.6 days
The month with the highest number of rainy days is August (23.2 days).
The month with the least rainy days is February (9.1 days).
Average snowfall in September
Rosendal, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is January (581mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Rosendal, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (18.3 days).
The months with the least snowfall days are July, August and September (0 days).
Average sea temperature in September
Rosendal, Norway
- Average sea temperature in September: 14.8°C
The best month for swimming (with the highest average sea temperature) is August (16.3°C).
The coldest month (with the lowest average sea temperature) is March (4.8°C).
Average daylight in September /
Average sunshine in September
Rosendal, 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 0min).
- Average sunshine in September: 4h and 48min
The month with the most sunshine is June (Average sunshine: 7h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).
Average sunshine days in September
Rosendal, Norway
- Average sunshine days in September: 8.4 days
The month with the most sunshine days is October (10.4 days).
The month with the least sunshine days is August (5.7 days).
Average UV index in September
Rosendal, Norway
- Average UV index in September: 2
The months with the highest UV index are June, July and August (UV index 3).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Rosendal, Norway
- Average cloud cover in September: 69
The month with the most cloud cover is December (Cloud cover 76).
The month with the least cloud cover is June (Cloud cover 61).
Average visibility in September
Rosendal, Norway
- Average visibility in September: 8km
The months with the highest visibility are June, July, August, September and October (8km).
The months with the lowest visibility are February, March and December (6km).
