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 onset introduces a mild reduction in the average high-temperature, from an enjoyable 19.2°C (66.6°F) in August to a moderate 14.8°C (58.6°F). In the month of September, Grasmo experiences an average low-temperature of 7.4°C (45.3°F).Humidity
In Grasmo, the average relative humidity in September is 81%.Rainfall
In Grasmo, during September, the rain falls for 15.2 days and regularly aggregates up to 49mm (1.93") of precipitation. In Grasmo, Norway, during the entire year, the rain falls for 154 days and collects up to 552mm (21.73") of precipitation.Snowfall
In Grasmo, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 52min.On the first day of the month, sunrise is at 06:07 and sunset at 20:14. On the last day of September, sunrise is at 07:15 and sunset at 18:46 CEST.
Sunshine
The average sunshine in September is 7.1h.UV index
In Grasmo, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Exercise prevention - Warding off sunburn is urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Grasmo?
What is the average humidity in September in Grasmo?
How much does it rain in Grasmo in September?
When it does not snow in Grasmo?
Does it snow in Grasmo in September?
What is the average length of the day in September in Grasmo?
When are sunrise and sunset in September in Grasmo?
How long on average sun shines in September in Grasmo?
How high is the UV index in September in Grasmo?
Average temperature in September
Grasmo, Norway
- Average high temperature in September: 14.8°C
The warmest month (with the highest average high temperature) is July (20.8°C).
The month with the lowest average high temperature is January (-2°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is July (11.1°C).
The coldest month (with the lowest average low temperature) is February (-6.4°C).
Average pressure in September
Grasmo, Norway
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is April (1014.2mbar).
The month with the lowest atmospheric pressure is December (1007.9mbar).
Average wind speed in September
Grasmo, Norway
- Average wind speed in September: 10.7km/h
The windiest month (with the highest average wind speed) is January (11.2km/h).
The calmest months (with the lowest average wind speed) are July and August (9.5km/h).
Average humidity in September
Grasmo, Norway
- Average humidity in September: 81%
The month with the highest relative humidity is February (92%).
The months with the lowest relative humidity are May and June (71%).
Average rainfall in September
Grasmo, Norway
- Average rainfall in September: 49mm
The wettest month (with the highest rainfall) is August (63mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in September
Grasmo, Norway
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in September
Grasmo, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is March (193mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Grasmo, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grasmo, Norway
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).
Average sunshine days in September
Grasmo, Norway
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is April (14.4 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Grasmo, Norway
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February, March, November and December (UV index 1).
Average cloud cover in September
Grasmo, Norway
- Average cloud cover in September: 52
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
Grasmo, Norway
- Average visibility in September: 8km
The months with the highest visibility are April, May and June (9km).
The months with the lowest visibility are January and February (6km).
