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
Weather in September
Temperature
The arrival of September is marked by an average high-temperature of a still refreshing 13.9°C (57°F), bearing a close resemblance to August. A mild drop to an average of 11.6°C (52.9°F) marks the nights in Herdla during September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Herdla, during September, the rain falls for 21.8 days and regularly aggregates up to 161mm (6.34") of precipitation. Throughout the year, in Herdla, there are 229.7 rainfall days, and 1406mm (55.35") of precipitation is accumulated.Snowfall
In Herdla, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 53min.On the first day of the month, sunrise is at 06:35 and sunset at 20:44. On the last day of September, sunrise is at 07:45 and sunset at 19:14 CEST.
Sunshine
The average sunshine in September is 5.7h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Take precautions - Protection against sunburn is recommended. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are the temperatures in Herdla in September?
What is the average humidity in September in Herdla?
How many days does it rain in September in Herdla?
When it does not snow in Herdla?
Does it snow in Herdla in September?
What is the average length of the day in September in Herdla?
When are sunrise and sunset in September in Herdla?
How many hours of sunshine does Herdla have in September?
What is the UV index reading in September in Herdla?
Average temperature in September
Herdla, Norway
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is August (15.7°C).
The month with the lowest average high temperature is February (4.3°C).
- Average low temperature in September: 11.6°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Herdla, Norway
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1005mbar).
Average wind speed in September
Herdla, Norway
- Average wind speed in September: 23.6km/h
The windiest month (with the highest average wind speed) is January (29.5km/h).
The calmest month (with the lowest average wind speed) is July (18.5km/h).
Average humidity in September
Herdla, Norway
- Average humidity in September: 78%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Herdla, Norway
- Average rainfall in September: 161mm
The wettest month (with the highest rainfall) is October (178mm).
The driest month (with the least rainfall) is June (56mm).
Average rainfall days in September
Herdla, Norway
- Average rainfall days in September: 21.8 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is June (14.7 days).
Average snowfall in September
Herdla, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is February (51mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Herdla, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Herdla, Norway
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 5h and 4min
The month with the most sunshine is June (Average sunshine: 9h and 36min).
The months with the least sunshine are January and December (Average sunshine: 2h and 12min).
Average sunshine days in September
Herdla, Norway
- Average sunshine days in September: 7.2 days
The month with the most sunshine days is June (13.5 days).
The month with the least sunshine days is December (5.4 days).
Average UV index in September
Herdla, 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, October, November and December (UV index 2).
Average cloud cover in September
Herdla, Norway
- Average cloud cover in September: 60
The months with the most cloud cover are January and December (Cloud cover 68).
The month with the least cloud cover is May (Cloud cover 47).
Average visibility in September
Herdla, Norway
- Average visibility in September: 9km
The months with the highest visibility are May, June, July and August (10km).
The months with the lowest visibility are January, February, March, April, September, October, November and December (9km).
Herdla, Norway
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