September weather forecastRoa, Norway
September
Weather in September
September, the first month of the autumn in Roa, is still a mild month, with an average temperature fluctuating between 7°C (44.6°F) and 14.6°C (58.3°F).Temperature
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a comfortable 18.6°C (65.5°F) in August to a still refreshing 14.6°C (58.3°F). During September, an average low-temperature of 7°C (44.6°F) is observed.Humidity
In Roa, the average relative humidity in September is 80%.Rainfall
In Roa, in September, during 15 rainfall days, 68mm (2.68") of precipitation is typically accumulated. Throughout the year, there are 142.4 rainfall days, and 654mm (25.75") of precipitation is accumulated.Snowfall
In Roa, snow does not fall in June through September.Daylight
In Roa, the average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 06:13 and sunset at 20:21. On the last day of the month, sunrise is at 07:22 and sunset at 18:52 CEST.
Sunshine
The average sunshine in September is 7.2h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 in September translates into these instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roa, Norway
- Average high temperature in September: 14.6°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
Roa, Norway
- Average pressure in September: 1012.5mbar
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
Roa, 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
Roa, Norway
- Average humidity in September: 80%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Roa, Norway
- Average rainfall in September: 68mm
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
Roa, Norway
- Average rainfall days in September: 15 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
Roa, 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
Roa, Norway
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Roa, Norway
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 7h and 12min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).
Average sunshine days in September
Roa, Norway
- Average sunshine days in September: 12.3 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
Roa, 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
Roa, 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
Roa, 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).
