September weather forecastHenna, Norway
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Henna, Norway, with an average temperature varying between 13.7°C (56.7°F) and 9.8°C (49.6°F).Temperature
Henna experiences a subtle adjustment in high-temperatures to a still mild 13.7°C (56.7°F) with the onset of September, maintaining near parity with August's 15.9°C (60.6°F). Maintaining close parity with daytime warmth, the average nocturnal temperature during September stays at a frosty 9.8°C (49.6°F).Humidity
The average relative humidity in September in Henna is 76%.Rainfall
In Henna, during September, the rain falls for 16.4 days and regularly aggregates up to 74mm (2.91") of precipitation. Throughout the year, there are 168.1 rainfall days, and 781mm (30.75") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Henna is 12h and 58min.On the first day of September in Henna, sunrise is at 06:13 and sunset at 20:38. On the last day of the month, sunrise is at 07:33 and sunset at 18:59 CEST.
Sunshine
The average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Henna, Norway
- Average high temperature in September: 13.7°C
The warmest month (with the highest average high temperature) is August (15.9°C).
The months with the lowest average high temperature are January and February (2.2°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is August (11.6°C).
The coldest month (with the lowest average low temperature) is February (-0.8°C).
Average pressure in September
Henna, Norway
- Average pressure in September: 1010.1mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1002.8mbar).
Average wind speed in September
Henna, Norway
- Average wind speed in September: 15.7km/h
The windiest month (with the highest average wind speed) is December (21.3km/h).
The calmest month (with the lowest average wind speed) is August (11.9km/h).
Average humidity in September
Henna, Norway
- Average humidity in September: 76%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is November (72%).
Average rainfall in September
Henna, Norway
- Average rainfall in September: 74mm
The wettest month (with the highest rainfall) is December (92mm).
The driest month (with the least rainfall) is November (39mm).
Average rainfall days in September
Henna, Norway
- Average rainfall days in September: 16.4 days
The month with the highest number of rainy days is September (16.4 days).
The month with the least rainy days is November (10.9 days).
Average snowfall in September
Henna, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is February (209mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Henna, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Henna, Norway
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 12min).
The month with the shortest days is December (Average daylight: 4h and 54min).
- Average sunshine in September: 7h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 1h and 36min).
Average sunshine days in September
Henna, Norway
- Average sunshine days in September: 11.3 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is March (9.6 days).
Average UV index in September
Henna, 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
Henna, Norway
- Average cloud cover in September: 51
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 49).
Average visibility in September
Henna, Norway
- Average visibility in September: 10km
The months with the highest visibility are June, August, September, October and November (10km).
The months with the lowest visibility are January, February, March, April, May, July and December (9km).
