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 witnesses a gentle descent in average high-temperature, descending from August's comfortable 16.2°C (61.2°F) to a cool 11.4°C (52.5°F). Nighttime temperatures in Grong consistently average a wintry 5.2°C (41.4°F) during September.Humidity
In Grong, Norway, the average relative humidity in September is 85%.Rainfall
In Grong, during September, the rain falls for 15.9 days and regularly aggregates up to 66mm (2.6") of precipitation. Throughout the year, in Grong, there are 158.4 rainfall days, and 874mm (34.41") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Grong, Norway.Daylight
In Grong, the average length of the day in September is 13h and 2min.On the first day of the month, sunrise is at 05:53 and sunset at 20:27. On the last day of September, in Grong, sunrise is at 07:18 and sunset at 18:42 CEST.
Sunshine
The average sunshine in September is 5.6h.UV index
In Grong, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, an average UV index of 2 transforms into the following instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Grong?
What is the average humidity in September in Grong?
How much does it rain in Grong in September?
When it does not snow in Grong?
Does it snow in Grong in September?
What is the average length of the day in September in Grong?
When are sunrise and sunset in September in Grong?
How many hours of sunshine does Grong have in September?
How high is the UV index in September in Grong?
Average temperature in September
Grong, Norway
- Average high temperature in September: 11.4°C
The warmest month (with the highest average high temperature) is July (17.1°C).
The month with the lowest average high temperature is January (-4.5°C).
- Average low temperature in September: 5.2°C
The month with the highest average low temperature is July (8.8°C).
The coldest month (with the lowest average low temperature) is February (-9.6°C).
Average pressure in September
Grong, Norway
- Average pressure in September: 1010.6mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1003.5mbar).
Average wind speed in September
Grong, Norway
- Average wind speed in September: 9.9km/h
The windiest month (with the highest average wind speed) is January (11.8km/h).
The calmest month (with the lowest average wind speed) is August (8.4km/h).
Average humidity in September
Grong, Norway
- Average humidity in September: 85%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is June (74%).
Average rainfall in September
Grong, Norway
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is March (112mm).
The driest month (with the least rainfall) is July (41mm).
Average rainfall days in September
Grong, Norway
- Average rainfall days in September: 15.9 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in September
Grong, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is March (470mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Grong, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (21.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grong, Norway
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 6min).
The month with the shortest days is December (Average daylight: 4h and 12min).
- Average sunshine in September: 5h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 1h and 18min).
Average sunshine days in September
Grong, Norway
- Average sunshine days in September: 13 days
The month with the most sunshine days is August (16.8 days).
The month with the least sunshine days is March (6.3 days).
Average UV index in September
Grong, Norway
- Average UV index in September: 2
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, October, November and December (UV index 1).
Average cloud cover in September
Grong, Norway
- Average cloud cover in September: 63
The month with the most cloud cover is March (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 58).
Average visibility in September
Grong, Norway
- Average visibility in September: 8km
The month with the highest visibility is June (9km).
The months with the lowest visibility are January, February, March, April and December (6km).
