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 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
September
Weather in September
Temperature
The average high-temperature shows a slight dip in September, from August's comfortable 18.6°C (65.5°F) to a moderate 14.5°C (58.1°F). Strømmen's average low-temperature in the month of September is recorded at a chilly 7°C (44.6°F).Humidity
The average relative humidity in September is 81%.Rainfall
In September, the rain falls for 14.8 days. Throughout September, 62mm (2.44") of precipitation is accumulated. Throughout the year, there are 142.2 rainfall days, and 648mm (25.51") of precipitation is accumulated.Snowfall
In Strømmen, snow does not fall in June through September.Daylight
In Strømmen, the average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 06:12 and sunset at 20:19. On the last day of September, sunrise is at 07:20 and sunset at 18:51 CEST.
Sunshine
In Strømmen, Norway, the average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Strømmen in September?
What is the average humidity in September in Strømmen?
How much does it rain in Strømmen in September?
When it does not snow in Strømmen?
Does it snow in Strømmen in September?
How many hours of daylight does Strømmen have in September?
What time are sunrise and sunset in September in Strømmen?
How long on average sun shines in September in Strømmen?
What is the UV index reading in September in Strømmen?
Average temperature in September
Strømmen, Norway
- Average high temperature in September: 14.5°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
Strømmen, Norway
- Average pressure in September: 1012.6mbar
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
Strømmen, 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
Strømmen, Norway
- Average humidity in September: 81%
The month with the highest relative humidity is February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Strømmen, Norway
- Average rainfall in September: 62mm
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
Strømmen, Norway
- Average rainfall days in September: 14.8 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
Strømmen, 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
Strømmen, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Strømmen, Norway
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The months with the least sunshine are January and December (Average sunshine: 3h and 6min).
Average sunshine days in September
Strømmen, Norway
- Average sunshine days in September: 12.1 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
Strømmen, 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
Strømmen, 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
Strømmen, 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).
