September weather forecastIsdalsstø, Norway
September
Weather in September
The first month of the autumn, September, is still a mild month in Isdalsstø, Norway, with temperature in the range of an average low of 11.1°C (52°F) and an average high of 14°C (57.2°F).Temperature
September commences with an average high-temperature of a moderate 14°C (57.2°F), showing little deviation from August's 16.1°C (61°F). In Isdalsstø, the nightly September temperatures experience a slight descent from daily highs to an average low of 11.1°C (52°F).Humidity
In September, the average relative humidity is 79%.Rainfall
In September, the rain falls for 21.7 days. Throughout September, 150mm (5.91") of precipitation is accumulated. Throughout the year, there are 226.5 rainfall days, and 1565mm (61.61") of precipitation is accumulated.Snowfall
In Isdalsstø, snow does not fall in June through September.Sea temperature
In September, the average sea temperature is 14.4°C (57.9°F).Note: Diving into 14.4°C (57.9°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 13°C (55.4°F) feels ice-cold.
Daylight
The average length of the day in September is 12h and 53min.On the first day of September, sunrise is at 06:33 and sunset at 20:43. On the last day of the month, sunrise is at 07:43 and sunset at 19:13 CEST.
Sunshine
The average sunshine in September is 6.1h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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 sea temperature in September
Isdalsstø, Norway
- Average sea temperature in September: 14.4°C
The best month for swimming (with the highest average sea temperature) is August (15.3°C).
The coldest month (with the lowest average sea temperature) is March (4.9°C).
Average daylight in September /
Average sunshine in September
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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
Isdalsstø, 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).
