September weather forecastHellnar, Iceland
September
Weather in September
September, the first month of the autumn in Hellnar, is still a chilly month, with temperature in the range of an average low of 7.8°C (46°F) and an average high of 9.5°C (49.1°F).Temperature
As Hellnar welcomes September, the average high-temperature stabilizes at a chilly 9.5°C (49.1°F), showing little deviation from August's 11.3°C (52.3°F). Hellnar maintains a minor drop in temperature during September nights, with averages of 7.8°C (46°F).Humidity
In September, the average relative humidity is 80%.Rainfall
In Hellnar, in September, during 19.9 rainfall days, 91mm (3.58") of precipitation is typically accumulated. In Hellnar, during the entire year, the rain falls for 184.8 days and collects up to 827mm (32.56") of precipitation.Snowfall
Months with snowfall in Hellnar are January through May, September through December. September is the first month it typically snows in Hellnar. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. In Hellnar, during the entire year, snow falls for 46.9 days and aggregates up to 421mm (16.57") of snow.Daylight
In Hellnar, the average length of the day in September is 13h and 2min.On the first day of the month, sunrise is at 06:17 and sunset at 20:51. On the last day of September, sunrise is at 07:43 and sunset at 19:05 GMT.
Sunshine
The average sunshine in September is 4.6h.UV index
The average daily maximum UV index in September in Hellnar is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 2 suggests these recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hellnar, Iceland
- Average high temperature in September: 9.5°C
The warmest month (with the highest average high temperature) is August (11.3°C).
The month with the lowest average high temperature is March (3.3°C).
- Average low temperature in September: 7.8°C
The months with the highest average low temperature are July and August (9.3°C).
The coldest month (with the lowest average low temperature) is March (0.8°C).
Average pressure in September
Hellnar, Iceland
- Average pressure in September: 1002.6mbar
The month with the highest atmospheric pressure is June (1014.1mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).
Average wind speed in September
Hellnar, Iceland
- Average wind speed in September: 26.8km/h
The windiest month (with the highest average wind speed) is February (36.4km/h).
The calmest month (with the lowest average wind speed) is June (19.4km/h).
Average humidity in September
Hellnar, Iceland
- Average humidity in September: 80%
The months with the highest relative humidity are June and July (82%).
The months with the lowest relative humidity are March and December (75%).
Average rainfall in September
Hellnar, Iceland
- Average rainfall in September: 91mm
The wettest month (with the highest rainfall) is January (96mm).
The driest month (with the least rainfall) is June (37mm).
Average rainfall days in September
Hellnar, Iceland
- Average rainfall days in September: 19.9 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is February (12.2 days).
Average snowfall in September
Hellnar, Iceland
- Average snowfall in September: 1mm
The month with the highest snowfall is March (99mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Hellnar, Iceland
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is March (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Hellnar, Iceland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 24min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- 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 June (Average sunshine: 0h and 54min).
Average sunshine days in September
Hellnar, Iceland
- Average sunshine days in September: 8.5 days
The month with the most sunshine days is July (14.2 days).
The month with the least sunshine days is January (4.7 days).
Average UV index in September
Hellnar, Iceland
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Hellnar, Iceland
- Average cloud cover in September: 64
The month with the most cloud cover is March (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 56).
Average visibility in September
Hellnar, Iceland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March and December (8km).
