Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Rognan's September weather features a light decline in high-temperatures, reducing from a moderate 13.1°C (55.6°F) in August to a frosty 8.4°C (47.1°F). September's nights observe an average temperature of 2.7°C (36.9°F).Humidity
The average relative humidity in September in Rognan is 85%.Rainfall
In September, the rain falls for 19.2 days. Throughout September, 56mm (2.2") of precipitation is accumulated. In Rognan, during the entire year, the rain falls for 188.6 days and collects up to 807mm (31.77") of precipitation.Snowfall
Months with snowfall in Rognan are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, there are 130.4 snowfall days, and 2323mm (91.46") of snow is accumulated.Sea temperature
In Rognan, the average seawater temperature in September is 11.4°C (52.5°F).Note: Dipping into 11.4°C (52.5°F) below 10°C (50°F) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 13°C (55.4°F) can be jarring.
Daylight
In September, the average length of the day is 13h and 10min.On the first day of the month, sunrise is at 05:31 and sunset at 20:25. On the last day of September, sunrise is at 07:08 and sunset at 18:27 CEST.
Sunshine
In Rognan, Norway, the average sunshine in September is 6.3h.UV index
February through April, September through December, with an average maximum UV index of 1, are months with the lowest UV index in Rognan. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 1 during September leads to these advisories:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the temperature in September in Rognan?
What is the average humidity in September in Rognan?
How many days does it rain in September in Rognan?
When does it start to snow in Rognan?
What is the water temperature in September in Rognan?
How many hours of daylight does Rognan have in September?
When are sunrise and sunset in September in Rognan?
How many hours of sunshine does Rognan have in September?
When is the lowest UV index in Rognan?
How high is the UV index in September in Rognan?
Average temperature in September
Rognan, Norway
- Average high temperature in September: 8.4°C
The warmest month (with the highest average high temperature) is July (14.4°C).
The month with the lowest average high temperature is January (-7.8°C).
- Average low temperature in September: 2.7°C
The month with the highest average low temperature is July (7.3°C).
The coldest month (with the lowest average low temperature) is January (-13.3°C).
Average pressure in September
Rognan, Norway
- Average pressure in September: 1009.9mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1002.9mbar).
Average wind speed in September
Rognan, Norway
- Average wind speed in September: 11.5km/h
The windiest month (with the highest average wind speed) is January (15km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in September
Rognan, Norway
- Average humidity in September: 85%
The month with the highest relative humidity is April (93%).
The month with the lowest relative humidity is July (77%).
Average rainfall in September
Rognan, Norway
- Average rainfall in September: 56mm
The wettest month (with the highest rainfall) is March (99mm).
The driest month (with the least rainfall) is August (50mm).
Average rainfall days in September
Rognan, Norway
- Average rainfall days in September: 19.2 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is January (10.4 days).
Average snowfall in September
Rognan, Norway
- Average snowfall in September: 6mm
The month with the highest snowfall is March (472mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Rognan, Norway
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is March (22.9 days).
The months with the least snowfall days are July and August (0 days).
Average sea temperature in September
Rognan, Norway
- Average sea temperature in September: 11.4°C
The best month for swimming (with the highest average sea temperature) is July (13.5°C).
The coldest month (with the lowest average sea temperature) is March (3.3°C).
Average daylight in September /
Average sunshine in September
Rognan, Norway
- Average daylight in September: 13h and 1min
The month with the longest days is May (Average daylight: 20h and 6min).
The month with the shortest days is June (Average daylight: 0h and 0min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is August (Average sunshine: 8h and 30min).
The month with the least sunshine is June (Average sunshine: 1h and 0min).
Average sunshine days in September
Rognan, Norway
- Average sunshine days in September: 7.8 days
The month with the most sunshine days is August (9.3 days).
The month with the least sunshine days is March (5.5 days).
Average UV index in September
Rognan, Norway
- Average UV index in September: 1
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February, March, April, September, October, November and December (UV index 1).
Average cloud cover in September
Rognan, Norway
- Average cloud cover in September: 58
The month with the most cloud cover is March (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 54).
Average visibility in September
Rognan, Norway
- Average visibility in September: 8km
The months with the highest visibility are June, July and August (9km).
The month with the lowest visibility is April (6km).
Rognan, Norway
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