September weather forecastHerøyholmen, Norway
September
Weather in September
September, the first month of the autumn in Herøyholmen, is also a fresh month, with an average temperature fluctuating between 12.2°C (54°F) and 10.1°C (50.2°F).Temperature
Herøyholmen's shift into September is marked by a subtle change to a cool 12.2°C (54°F) from August's 14.5°C (58.1°F) in temperature. During the nights of September, Herøyholmen records an average temperature of 10.1°C (50.2°F), a minor drop from daytime peaks.Humidity
The average relative humidity in September is 77%.Rainfall
In September, the rain falls for 18.5 days. Throughout September, 78mm (3.07") of precipitation is accumulated. In Herøyholmen, during the entire year, the rain falls for 171.1 days and collects up to 742mm (29.21") of precipitation.Snowfall
June through September are months without snowfall in Herøyholmen, Norway.Daylight
The average length of the day in September is 13h and 7min.On the first day of September in Herøyholmen, Norway, sunrise is at 05:48 and sunset at 20:33. On the last day of the month, sunrise is at 07:20 and sunset at 18:41 CEST.
Sunshine
The average sunshine in September is 6.3h.UV index
In Herøyholmen, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 3 in September transforms into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Herøyholmen, Norway
- Average high temperature in September: 12.2°C
The warmest month (with the highest average high temperature) is August (14.5°C).
The months with the lowest average high temperature are January and February (1.2°C).
- Average low temperature in September: 10.1°C
The month with the highest average low temperature is August (11.9°C).
The coldest months (with the lowest average low temperature) are January and February (-1.5°C).
Average pressure in September
Herøyholmen, Norway
- Average pressure in September: 1009.7mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1001.9mbar).
Average wind speed in September
Herøyholmen, Norway
- Average wind speed in September: 19.7km/h
The windiest month (with the highest average wind speed) is January (27.7km/h).
The calmest month (with the lowest average wind speed) is July (15.6km/h).
Average humidity in September
Herøyholmen, Norway
- Average humidity in September: 77%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Herøyholmen, Norway
- Average rainfall in September: 78mm
The wettest month (with the highest rainfall) is October (79mm).
The driest month (with the least rainfall) is May (41mm).
Average rainfall days in September
Herøyholmen, Norway
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is September (18.5 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in September
Herøyholmen, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is March (106mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Herøyholmen, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Herøyholmen, Norway
- Average daylight in September: 13h and 6min
The month with the longest days is July (Average daylight: 20h and 54min).
The month with the shortest days is December (Average daylight: 3h and 12min).
- Average sunshine in September: 6h and 18min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in September
Herøyholmen, Norway
- Average sunshine days in September: 10.1 days
The month with the most sunshine days is January (13.1 days).
The month with the least sunshine days is March (9.8 days).
Average UV index in September
Herøyholmen, Norway
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Herøyholmen, Norway
- Average cloud cover in September: 57
The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 51).
Average visibility in September
Herøyholmen, Norway
- Average visibility in September: 10km
The months with the highest visibility are June, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, July, November and December (9km).
