September weather forecastHella, Iceland
September
Weather in September
September serves as a transitional month marking the onset of Autumn in Hella. A downturn in average temperatures to a high of 10°C (50°F) and a low of 6.1°C (43°F) signals a departure from the summer warmth. Snowfall remains absent, but the frequency of rainy days increases. Shortening daylight hours point toward the impending winter solstice. Despite the drops in temperature, Hella continues to cater to enraptured visitors with its idyllic autumnal weather.Temperature
Transition into September in Hella subtly marks a drop in the average high-temperature, moderately moving from a mild 13.1°C (55.6°F) in August to a fresh 10°C (50°F). During September, Hella perceives a slight decrease in temperature from daytime highs, settling at an average low of 6.1°C (43°F).Humidity
The months with the highest humidity are January and September, with an average relative humidity of 82%.Rainfall
In Hella, during September, the rain falls for 18.7 days and regularly aggregates up to 95mm (3.74") of precipitation. In Hella, during the entire year, the rain falls for 208.7 days and collects up to 1105mm (43.5") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Hella is 13h and 0min.On the first day of September in Hella, sunrise is at 06:07 and sunset at 20:35. On the last day of the month, sunrise is at 07:29 and sunset at 18:53 GMT.
Sunshine
In September, the average sunshine in Hella is 4.6h.UV index
The average daily maximum UV index in September in Hella, Iceland, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the UV index of 2 transforms into the following advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hella, Iceland
- Average high temperature in September: 10°C
The warmest month (with the highest average high temperature) is July (13.8°C).
The month with the lowest average high temperature is December (1.5°C).
- Average low temperature in September: 6.1°C
The month with the highest average low temperature is July (8.9°C).
The coldest month (with the lowest average low temperature) is December (-1.9°C).
Average pressure in September
Hella, Iceland
- Average pressure in September: 1003mbar
The month with the highest atmospheric pressure is June (1013.8mbar).
The month with the lowest atmospheric pressure is January (996.8mbar).
Average wind speed in September
Hella, Iceland
- Average wind speed in September: 19.8km/h
The windiest month (with the highest average wind speed) is February (24.8km/h).
The calmest month (with the lowest average wind speed) is July (14.7km/h).
Average humidity in September
Hella, Iceland
- Average humidity in September: 82%
The months with the highest relative humidity are January and September (82%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Hella, Iceland
- Average rainfall in September: 95mm
The wettest month (with the highest rainfall) is January (142mm).
The driest month (with the least rainfall) is June (45mm).
Average rainfall days in September
Hella, Iceland
- Average rainfall days in September: 18.7 days
The month with the highest number of rainy days is April (19.9 days).
The month with the least rainy days is December (14.3 days).
Average snowfall in September
Hella, Iceland
- Average snowfall in September: 0mm
The month with the highest snowfall is March (220mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Hella, Iceland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (13.3 days).
The months with the least snowfall days are July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Hella, Iceland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in September: 4h and 36min
The month with the most sunshine is August (Average sunshine: 7h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Hella, Iceland
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is June (12.3 days).
The month with the least sunshine days is January (5.5 days).
Average UV index in September
Hella, Iceland
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
Hella, Iceland
- Average cloud cover in September: 64
The month with the most cloud cover is March (Cloud cover 67).
The months with the least cloud cover are May and August (Cloud cover 59).
Average visibility in September
Hella, Iceland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February and March (8km).
