September weather forecastArna, Norway
September
Weather in September
The first month of the autumn, September, is also a moderate month in Arna, Norway, with an average temperature varying between 11.1°C (52°F) and 14°C (57.2°F).Temperature
Stepping into September, Arna records an average high-temperature of a still refreshing 14°C (57.2°F), almost consistent with August. The nights of September in Arna are characterized by an average low-temperature of 11.1°C (52°F), subtly descending from daytime highs.Humidity
In Arna, the average relative humidity in September is 79%.Rainfall
In Arna, in September, during 21.7 rainfall days, 150mm (5.91") of precipitation is typically accumulated. In Arna, during the entire year, the rain falls for 226.5 days and collects up to 1565mm (61.61") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Arna, Norway, the average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 06:33 and sunset at 20:42. On the last day of the month, sunrise is at 07:42 and sunset at 19:13 CEST.
Sunshine
The average sunshine in September in Arna is 6.1h.UV index
In September, the average daily maximum UV index in Arna is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Arna, Norway
- Average high temperature in September: 14°C
The warmest month (with the highest average high temperature) is August (16.1°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 11.1°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (0°C).
Average pressure in September
Arna, Norway
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1005.8mbar).
Average wind speed in September
Arna, Norway
- Average wind speed in September: 16.4km/h
The windiest months (with the highest average wind speed) are January and December (21.1km/h).
The calmest month (with the lowest average wind speed) is June (13.6km/h).
Average humidity in September
Arna, Norway
- Average humidity in September: 79%
The month with the highest relative humidity is March (81%).
The months with the lowest relative humidity are May and October (75%).
Average rainfall in September
Arna, Norway
- Average rainfall in September: 150mm
The wettest month (with the highest rainfall) is October (201mm).
The driest month (with the least rainfall) is April (73mm).
Average rainfall days in September
Arna, Norway
- Average rainfall days in September: 21.7 days
The month with the highest number of rainy days is August (22.2 days).
The month with the least rainy days is February (14.8 days).
Average snowfall in September
Arna, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is January (127mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Arna, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Arna, Norway
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 6h and 6min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
Average sunshine days in September
Arna, Norway
- Average sunshine days in September: 7 days
The month with the most sunshine days is May (12 days).
The month with the least sunshine days is December (5.4 days).
Average UV index in September
Arna, Norway
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Arna, Norway
- Average cloud cover in September: 57
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is May (Cloud cover 47).
Average visibility in September
Arna, Norway
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
