September weather forecastBy, Norway
September
Weather in September
September, the first month of the autumn in By, is still a cool month, with an average temperature fluctuating between 12.5°C (54.5°F) and 7.7°C (45.9°F).Temperature
The move into September indicates a slight reduction in the average high-temperature, down from August's refreshing 16.3°C (61.3°F) to a cool 12.5°C (54.5°F). September in By is characterized by a steady nighttime low-temperature of 7.7°C (45.9°F).Humidity
The average relative humidity in September in By is 82%.Rainfall
In By, Norway, during September, the rain falls for 18 days and regularly aggregates up to 72mm (2.83") of precipitation. In By, during the entire year, the rain falls for 193.1 days and collects up to 854mm (33.62") of precipitation.Snowfall
In By, snow does not fall in June through September.Daylight
The average length of the day in September in By is 13h and 1min.On the first day of the month, sunrise is at 06:03 and sunset at 20:33. On the last day of September, sunrise is at 07:25 and sunset at 18:50 CEST.
Sunshine
The average sunshine in September in By is 6.5h.UV index
In By, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
By, Norway
- Average high temperature in September: 12.5°C
The warmest month (with the highest average high temperature) is July (17°C).
The month with the lowest average high temperature is January (-1.3°C).
- Average low temperature in September: 7.7°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 (-5°C).
Average pressure in September
By, Norway
- Average pressure in September: 1010.3mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1003mbar).
Average wind speed in September
By, Norway
- Average wind speed in September: 13.3km/h
The windiest month (with the highest average wind speed) is January (16.6km/h).
The calmest month (with the lowest average wind speed) is July (10.2km/h).
Average humidity in September
By, Norway
- Average humidity in September: 82%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
By, Norway
- Average rainfall in September: 72mm
The wettest month (with the highest rainfall) is December (103mm).
The driest month (with the least rainfall) is June (46mm).
Average rainfall days in September
By, Norway
- Average rainfall days in September: 18 days
The month with the highest number of rainy days is October (19.7 days).
The month with the least rainy days is February (10.2 days).
Average snowfall in September
By, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is February (339mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
By, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (18 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
By, Norway
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 42min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in September: 6h and 30min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).
Average sunshine days in September
By, Norway
- Average sunshine days in September: 10.9 days
The month with the most sunshine days is September (10.9 days).
The month with the least sunshine days is March (7.2 days).
Average UV index in September
By, Norway
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are February, March and December (UV index 1).
Average cloud cover in September
By, Norway
- Average cloud cover in September: 56
The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 52).
Average visibility in September
By, Norway
- Average visibility in September: 9km
The months with the highest visibility are May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February, March, April and December (8km).
