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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a comfortable 18.3°C (64.9°F) in August to a moderate 15.2°C (59.4°F). Recording a slight drop from the daily maximum, Herefoss notes an average low temperature of 11°C (51.8°F) in the month of September.Humidity
In Herefoss, the average relative humidity in September is 78%.Rainfall
In Herefoss, Norway, in September, it is raining for 12.6 days, with typically 65mm (2.56") of accumulated precipitation. In Herefoss, during the entire year, the rain falls for 137.7 days and collects up to 744mm (29.29") of precipitation.Snowfall
In Herefoss, Norway, snow does not fall in May through September.Daylight
In Herefoss, the average length of the day in September is 12h and 49min.On the first day of the month, sunrise is at 06:26 and sunset at 20:26. On the last day of September, sunrise is at 07:30 and sunset at 19:02 CEST.
Sunshine
The average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Herefoss?
What is the average humidity in September in Herefoss?
How many days does it rain in September in Herefoss?
When it does not snow in Herefoss?
Does it snow in Herefoss in September?
How many hours of daylight does Herefoss have in September?
When is the sunrise / sunset in September in Herefoss?
How many hours of sunshine does Herefoss have in September?
What is the UV index reading in September in Herefoss?
Average temperature in September
Herefoss, Norway
- Average high temperature in September: 15.2°C
The warmest month (with the highest average high temperature) is July (19.2°C).
The month with the lowest average high temperature is February (1.3°C).
- Average low temperature in September: 11°C
The month with the highest average low temperature is July (13.6°C).
The coldest month (with the lowest average low temperature) is February (-1.5°C).
Average pressure in September
Herefoss, Norway
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is April (1014.6mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in September
Herefoss, Norway
- Average wind speed in September: 18.3km/h
The windiest month (with the highest average wind speed) is November (21.1km/h).
The calmest month (with the lowest average wind speed) is June (15.5km/h).
Average humidity in September
Herefoss, Norway
- Average humidity in September: 78%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are May and June (70%).
Average rainfall in September
Herefoss, Norway
- Average rainfall in September: 65mm
The wettest month (with the highest rainfall) is November (88mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in September
Herefoss, Norway
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is November (15.5 days).
The month with the least rainy days is February (8 days).
Average snowfall in September
Herefoss, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is January (130mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Herefoss, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Herefoss, Norway
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).
Average sunshine days in September
Herefoss, Norway
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is April (19 days).
The month with the least sunshine days is November (10.8 days).
Average UV index in September
Herefoss, Norway
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Herefoss, Norway
- Average cloud cover in September: 44
The month with the most cloud cover is November (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in September
Herefoss, Norway
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).
