September weather forecastRotnes, Norway
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Rotnes, Norway, with an average temperature varying between 7°C (44.6°F) and 14.5°C (58.1°F).Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a refreshing 18.6°C (65.5°F) in August to a mild 14.5°C (58.1°F). Rotnes, during the nights of September, experiences an average temperature drop to a chilly 7°C (44.6°F).Humidity
In September, the average relative humidity is 81%.Rainfall
In Rotnes, in September, during 14.8 rainfall days, 62mm (2.44") of precipitation is typically accumulated. Throughout the year, there are 142.2 rainfall days, and 648mm (25.51") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Rotnes.Daylight
In Rotnes, the average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 06:12 and sunset at 20:19. On the last day of September, in Rotnes, sunrise is at 07:21 and sunset at 18:51 CEST.
Sunshine
In September, the average sunshine in Rotnes is 7.3h.UV index
In Rotnes, Norway, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during September leads to these instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rotnes, Norway
- Average high temperature in September: 14.5°C
The warmest month (with the highest average high temperature) is July (20.1°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in September: 7°C
The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is February (-8.2°C).
Average pressure in September
Rotnes, Norway
- Average pressure in September: 1012.6mbar
The month with the highest atmospheric pressure is April (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Rotnes, Norway
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is May (9.3km/h).
The calmest month (with the lowest average wind speed) is August (8.1km/h).
Average humidity in September
Rotnes, Norway
- Average humidity in September: 81%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Rotnes, Norway
- Average rainfall in September: 62mm
The wettest month (with the highest rainfall) is July (79mm).
The driest months (with the least rainfall) are January and April (27mm).
Average rainfall days in September
Rotnes, Norway
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is July (22 days).
The months with the least rainy days are January and February (2.8 days).
Average snowfall in September
Rotnes, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is March (238mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Rotnes, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rotnes, 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: 7h and 18min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).
Average sunshine days in September
Rotnes, Norway
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is January (16.9 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in September
Rotnes, Norway
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March and December (UV index 1).
Average cloud cover in September
Rotnes, Norway
- Average cloud cover in September: 51
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
Rotnes, Norway
- Average visibility in September: 8km
The months with the highest visibility are May and June (9km).
The months with the lowest visibility are January, February and March (6km).
