September weather forecastOna, Norway
September
Weather in September
September, the first month of the autumn in Ona, is also a moderate month, with temperature in the range of an average low of 11.4°C (52.5°F) and an average high of 13.4°C (56.1°F).Temperature
The introduction of September notes a subtle temperature variation to a still refreshing 13.4°C (56.1°F) from August's 15°C (59°F). A minimal decline in temperature from daytime highs is anticipated throughout the September nights, averaging a cool 11.4°C (52.5°F).Humidity
The average relative humidity in September in Ona is 77%.Rainfall
In Ona, in September, it is raining for 20.7 days, with typically 111mm (4.37") of accumulated precipitation. In Ona, during the entire year, the rain falls for 219.8 days and collects up to 1124mm (44.25") of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Ona, the average length of the day in September is 12h and 58min.On the first day of the month, sunrise is at 06:22 and sunset at 20:45. On the last day of September, in Ona, Norway, sunrise is at 07:40 and sunset at 19:06 CEST.
Sunshine
In September, the average sunshine in Ona is 6.5h.UV index
In Ona, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 3 in September translates into this advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ona, Norway
- Average high temperature in September: 13.4°C
The warmest month (with the highest average high temperature) is August (15°C).
The month with the lowest average high temperature is February (4.2°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is February (2.1°C).
Average pressure in September
Ona, Norway
- Average pressure in September: 1010mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1002.5mbar).
Average wind speed in September
Ona, Norway
- Average wind speed in September: 21.6km/h
The windiest month (with the highest average wind speed) is December (28.7km/h).
The calmest month (with the lowest average wind speed) is August (16.9km/h).
Average humidity in September
Ona, Norway
- Average humidity in September: 77%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is November (70%).
Average rainfall in September
Ona, Norway
- Average rainfall in September: 111mm
The wettest month (with the highest rainfall) is December (143mm).
The driest month (with the least rainfall) is June (53mm).
Average rainfall days in September
Ona, Norway
- Average rainfall days in September: 20.7 days
The month with the highest number of rainy days is August (21 days).
The month with the least rainy days is January (15.8 days).
Average snowfall in September
Ona, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is February (127mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Ona, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ona, Norway
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 0min).
The month with the shortest days is December (Average daylight: 5h and 0min).
- Average sunshine in September: 6h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in September
Ona, Norway
- Average sunshine days in September: 7.7 days
The months with the most sunshine days are May and November (10.5 days).
The month with the least sunshine days is December (6.1 days).
Average UV index in September
Ona, 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
Ona, Norway
- Average cloud cover in September: 54
The month with the most cloud cover is March (Cloud cover 66).
The month with the least cloud cover is May (Cloud cover 52).
Average visibility in September
Ona, Norway
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
