September weather forecastTertnes, Norway
September
Weather in September
The first month of the autumn, September, is still a mild month in Tertnes, Norway, with an average temperature varying between 11°C (51.8°F) and 13.9°C (57°F).Temperature
Tertnes experiences a subtle adjustment in high-temperatures to a still refreshing 13.9°C (57°F) with the onset of September, maintaining near parity with August's 16.1°C (61°F). Tertnes's nighttime temperatures in September see a subtle dip to an average of 11°C (51.8°F).Humidity
In Tertnes, the average relative humidity in September is 79%.Rainfall
In Tertnes, during September, the rain falls for 22.3 days and regularly aggregates up to 179mm (7.05") of precipitation. Throughout the year, in Tertnes, there are 227.1 rainfall days, and 1594mm (62.76") of precipitation is accumulated.Snowfall
In Tertnes, snow does not fall in June through September.Daylight
In Tertnes, Norway, the average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 06:34 and sunset at 20:43. On the last day of the month, sunrise is at 07:43 and sunset at 19:13 CEST.
Sunshine
In September, the average sunshine is 6h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 3 during September leads to these advisories:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tertnes, Norway
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is August (16.1°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 11°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (0°C).
Average pressure in September
Tertnes, Norway
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1005.8mbar).
Average wind speed in September
Tertnes, Norway
- Average wind speed in September: 16.7km/h
The windiest months (with the highest average wind speed) are January and December (21.1km/h).
The calmest month (with the lowest average wind speed) is June (13.6km/h).
Average humidity in September
Tertnes, Norway
- Average humidity in September: 79%
The month with the highest relative humidity is March (81%).
The months with the lowest relative humidity are May and October (75%).
Average rainfall in September
Tertnes, Norway
- Average rainfall in September: 179mm
The wettest month (with the highest rainfall) is October (201mm).
The driest month (with the least rainfall) is April (73mm).
Average rainfall days in September
Tertnes, Norway
- Average rainfall days in September: 22.3 days
The month with the highest number of rainy days is September (22.3 days).
The month with the least rainy days is February (14.8 days).
Average snowfall in September
Tertnes, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is January (127mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Tertnes, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Tertnes, Norway
- Average daylight in September: 12h and 54min
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: 6h and 0min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 12min).
Average sunshine days in September
Tertnes, Norway
- Average sunshine days in September: 6.6 days
The month with the most sunshine days is May (12 days).
The month with the least sunshine days is December (5.4 days).
Average UV index in September
Tertnes, Norway
- Average UV index in September: 3
The months with the highest UV index are 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
Tertnes, Norway
- Average cloud cover in September: 58
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is May (Cloud cover 47).
Average visibility in September
Tertnes, Norway
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
