September weather forecastTretten, Norway
September
Weather in September
The first month of the autumn, September, is also a fresh month in Tretten, Norway, with an average temperature ranging between min 2.9°C (37.2°F) and max 10.5°C (50.9°F).Temperature
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a refreshing 15°C (59°F) to a fresh 10.5°C (50.9°F). The low-temperature average for Tretten during September stands at an icy 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 Tretten, snow does not fall in June through September.Daylight
In Tretten, the average length of the day in September is 12h and 55min.On the first day of the month, sunrise is at 06:11 and sunset at 20:25. On the last day of September, sunrise is at 07:24 and sunset at 18:53 CEST.
Sunshine
In September, the average sunshine in Tretten is 7.2h.UV index
In September, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 2 during September translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, Norway
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 36min).
- Average sunshine in September: 7h and 12min
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
Tretten, 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
Tretten, 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
Tretten, 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
Tretten, 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).
