September weather forecastMongstad, Norway
September
Weather in September
September, the first month of the autumn in Mongstad, is still a refreshing month, with an average temperature fluctuating between 13.9°C (57°F) and 11.6°C (52.9°F).Temperature
Mongstad's transition from August to September introduces an average high-temperature of a still mild 13.9°C (57°F), marking an insignificant variation from the 15.7°C (60.3°F). September nights experience a minor temperature downturn to a fresh 11.6°C (52.9°F).Humidity
In September, the average relative humidity is 78%.Rainfall
In Mongstad, in September, it is raining for 21.8 days, with typically 161mm (6.34") of accumulated precipitation. Throughout the year, there are 229.7 rainfall days, and 1406mm (55.35") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 53min.On the first day of September, sunrise is at 06:34 and sunset at 20:45. On the last day of the month, sunrise is at 07:44 and sunset at 19:14 CEST.
Sunshine
In September, the average sunshine is 5.7h.UV index
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 unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 3 in September suggests the following recommendations:
Undertake protective steps - Preventing sun damage is advised. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mongstad, Norway
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is August (15.7°C).
The month with the lowest average high temperature is February (4.3°C).
- Average low temperature in September: 11.6°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Mongstad, Norway
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1005mbar).
Average wind speed in September
Mongstad, Norway
- Average wind speed in September: 23.6km/h
The windiest month (with the highest average wind speed) is January (29.5km/h).
The calmest month (with the lowest average wind speed) is July (18.5km/h).
Average humidity in September
Mongstad, Norway
- Average humidity in September: 78%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Mongstad, Norway
- Average rainfall in September: 161mm
The wettest month (with the highest rainfall) is October (178mm).
The driest month (with the least rainfall) is June (56mm).
Average rainfall days in September
Mongstad, Norway
- Average rainfall days in September: 21.8 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is June (14.7 days).
Average snowfall in September
Mongstad, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is February (51mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Mongstad, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mongstad, Norway
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 0min).
The month with the shortest days is December (Average daylight: 5h and 48min).
- Average sunshine in September: 5h and 42min
The month with the most sunshine is June (Average sunshine: 9h and 36min).
The months with the least sunshine are January and December (Average sunshine: 2h and 12min).
Average sunshine days in September
Mongstad, Norway
- Average sunshine days in September: 7.2 days
The month with the most sunshine days is June (13.5 days).
The month with the least sunshine days is December (5.4 days).
Average UV index in September
Mongstad, 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, October, November and December (UV index 2).
Average cloud cover in September
Mongstad, Norway
- Average cloud cover in September: 60
The months with the most cloud cover are January and December (Cloud cover 68).
The month with the least cloud cover is May (Cloud cover 47).
Average visibility in September
Mongstad, Norway
- Average visibility in September: 9km
The months with the highest visibility are May, June, July and August (10km).
The months with the lowest visibility are January, February, March, April, September, October, November and December (9km).
