Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Hellissandur, Iceland, marks the onset of September with an average high-temperature of a frosty 9.5°C (49.1°F), subtly divergent from August's 11.3°C (52.3°F). Throughout September, Hellissandur observes a steady low-temperature average of 7.8°C (46°F), reflecting a minor dip from daytime highs.Humidity
In Hellissandur, the average relative humidity in September is 80%.Rainfall
In Hellissandur, during September, the rain falls for 19.9 days and regularly aggregates up to 91mm (3.58") of precipitation. In Hellissandur, Iceland, during the entire year, the rain falls for 184.8 days and collects up to 827mm (32.56") of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow. Throughout the year, in Hellissandur, there are 46.9 snowfall days, and 421mm (16.57") of snow is accumulated.Daylight
In Hellissandur, 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 20:53. On the last day of September, sunrise is at 07:44 and sunset at 19:06 GMT.
Sunshine
The average sunshine in September in Hellissandur, Iceland, is 4.6h.UV index
In Hellissandur, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in September translates into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Hellissandur in September?
What is the average humidity in September in Hellissandur?
How much does it rain in Hellissandur in September?
When does it start snowing in Hellissandur?
How many hours of daylight does Hellissandur have in September?
What time are sunrise and sunset in September in Hellissandur?
How long on average sun shines in September in Hellissandur?
What is the UV index reading in September in Hellissandur?
Average temperature in September
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, Iceland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 36min).
The month with the shortest days is December (Average daylight: 3h and 54min).
- Average sunshine in September: 4h and 4min
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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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
Hellissandur, 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).
