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 beginning of September brings a slight decrease in the average high-temperature, transitioning from a refreshing 15°C (59°F) in August to a fresh 10.5°C (50.9°F). During September, Harpefoss witnesses a consistent average low-temperature of 2.9°C (37.2°F).Humidity
In September, the average relative humidity is 82%.Rainfall
In September, the rain falls for 10.4 days. Throughout September, 18mm (0.71") of precipitation is accumulated. Throughout the year, there are 122 rainfall days, and 286mm (11.26") of precipitation is accumulated.Snowfall
In Harpefoss, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 55min.On the first day of September, sunrise is at 06:12 and sunset at 20:28. On the last day of the month, sunrise is at 07:26 and sunset at 18:54 CEST.
Sunshine
In Harpefoss, the average sunshine in September is 7.2h.UV index
The average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 2 during September leads to these instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September in Harpefoss?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Harpefoss have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Harpefoss have in September?
What is the UV index intensity in September?
Average temperature in September
Harpefoss, Norway
- Average high temperature in September: 10.5°C
The warmest month (with the highest average high temperature) is July (16.8°C).
The month with the lowest average high temperature is January (-7.5°C).
- Average low temperature in September: 2.9°C
The month with the highest average low temperature is July (6.8°C).
The coldest month (with the lowest average low temperature) is January (-13.7°C).
Average pressure in September
Harpefoss, Norway
- Average pressure in September: 1012.1mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1007.2mbar).
Average wind speed in September
Harpefoss, Norway
- Average wind speed in September: 10.5km/h
The windiest month (with the highest average wind speed) is June (10.9km/h).
The calmest months (with the lowest average wind speed) are April and November (8.8km/h).
Average humidity in September
Harpefoss, Norway
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is June (70%).
Average rainfall in September
Harpefoss, Norway
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is July (56mm).
The driest month (with the least rainfall) is January (11mm).
Average rainfall days in September
Harpefoss, Norway
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in September
Harpefoss, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is December (75mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Harpefoss, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harpefoss, Norway
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 24min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
Average sunshine days in September
Harpefoss, Norway
- Average sunshine days in September: 16.1 days
The months with the most sunshine days are January and October (16.8 days).
The month with the least sunshine days is July (8.9 days).
Average UV index in September
Harpefoss, Norway
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, October and December (UV index 1).
Average cloud cover in September
Harpefoss, Norway
- Average cloud cover in September: 53
The months with the most cloud cover are January and February (Cloud cover 61).
The month with the least cloud cover is June (Cloud cover 49).
Average visibility in September
Harpefoss, Norway
- Average visibility in September: 8km
The months with the highest visibility are June and July (9km).
The months with the lowest visibility are January, March, April and November (6km).
