September weather forecastHønefoss, Norway
September
Weather in September
In September, there's a shift in the air as Hønefoss welcomes autumn. The foliage begins to change color, painting the town in hues of red, orange, and gold. Despite the rainfall lowering to 53mm (2.09"), the dropped leaves create a picturesque backdrop for this enchanting Norwegian town. The crisp autumn air is rejuvenating, coupled with the graceful fall of leaves making this month truly delightful. However, daylight hours start to dwindle, signaling the impending arrival of winter months.Temperature
In September, the average high-temperature in Hønefoss marginally decreases from a comfortable 18.4°C (65.1°F) in August to a mild 13.9°C (57°F). The temperature in Hønefoss lowers to an average of 6.2°C (43.2°F) during September nights.Humidity
In September, the average relative humidity is 81%.Rainfall
In Hønefoss, in September, it is raining for 12.6 days, with typically 53mm (2.09") of accumulated precipitation. In Hønefoss, Norway, during the entire year, the rain falls for 136.4 days and collects up to 628mm (24.72") of precipitation.Snowfall
In Hønefoss, 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 06:14 and sunset at 20:22. On the last day of September, in Hønefoss, sunrise is at 07:23 and sunset at 18:54 CEST.
Sunshine
In Hønefoss, the average sunshine in September is 7.4h.UV index
In September, the average daily maximum UV index in Hønefoss is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 3 in September translates into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hønefoss, Norway
- Average high temperature in September: 13.9°C
The warmest month (with the highest average high temperature) is July (20.1°C).
The month with the lowest average high temperature is January (-3.8°C).
- Average low temperature in September: 6.2°C
The month with the highest average low temperature is July (10.1°C).
The coldest month (with the lowest average low temperature) is February (-8.8°C).
Average pressure in September
Hønefoss, Norway
- Average pressure in September: 1012.5mbar
The month with the highest atmospheric pressure is April (1014.6mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Hønefoss, Norway
- Average wind speed in September: 8.3km/h
The windiest month (with the highest average wind speed) is May (8.5km/h).
The calmest month (with the lowest average wind speed) is August (7.3km/h).
Average humidity in September
Hønefoss, Norway
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Hønefoss, Norway
- Average rainfall in September: 53mm
The wettest month (with the highest rainfall) is July (73mm).
The driest month (with the least rainfall) is April (26mm).
Average rainfall days in September
Hønefoss, Norway
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Hønefoss, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is January (295mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Hønefoss, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hønefoss, Norway
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The months with the least sunshine are January and December (Average sunshine: 3h and 18min).
Average sunshine days in September
Hønefoss, Norway
- Average sunshine days in September: 15.3 days
The months with the most sunshine days are March and October (16 days).
The month with the least sunshine days is July (9 days).
Average UV index in September
Hønefoss, 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 and December (UV index 1).
Average cloud cover in September
Hønefoss, Norway
- Average cloud cover in September: 50
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is June (Cloud cover 46).
Average visibility in September
Hønefoss, Norway
- Average visibility in September: 8km
The months with the highest visibility are May and June (9km).
The months with the lowest visibility are January, February and March (6km).
