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 sea temperature 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
Weather in September
Temperature
September's presence records an average high-temperature of a frosty 8.5°C (47.3°F), closely mirroring August's climate. September introduces a small decrease to a nighttime average of 6.5°C (43.7°F) in Höfn.Humidity
In September, the average relative humidity is 82%.Rainfall
In September, the rain falls for 18.9 days. Throughout September, 125mm (4.92") of precipitation is accumulated. Throughout the year, there are 197.4 rainfall days, and 1278mm (50.31") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Sea temperature
In Höfn, the average seawater temperature in September is 9.3°C (48.7°F).Note: Swimming in 9.3°C (48.7°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
Daylight
In Höfn, Iceland, the average length of the day in September is 13h and 1min.On the first day of the month, sunrise is at 05:44 and sunset at 20:16. On the last day of September, sunrise is at 07:08 and sunset at 18:32 GMT.
Sunshine
The average sunshine in September in Höfn is 6h.UV index
The months with the lowest UV index are January through May, September through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 2 suggests this advice:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What are the temperatures in Höfn in September?
What is the average humidity in September in Höfn?
How many days does it rain in September in Höfn?
When it does not snow in Höfn?
Does it snow in Höfn in September?
What is the sea water temperature in September in Höfn?
What is the average length of the day in September in Höfn?
What time are sunrise and sunset in September in Höfn?
How many hours of sunshine does Höfn have in September?
When is the lowest UV index in Höfn?
How high is the UV index in September in Höfn?
Average temperature in September
Höfn, Iceland
- Average high temperature in September: 8.5°C
The warmest months (with the highest average high temperature) are July and August (10.3°C).
The month with the lowest average high temperature is December (2.2°C).
- Average low temperature in September: 6.5°C
The months with the highest average low temperature are July and August (8.3°C).
The coldest month (with the lowest average low temperature) is December (-1.3°C).
Average pressure in September
Höfn, Iceland
- Average pressure in September: 1003.9mbar
The month with the highest atmospheric pressure is June (1014.2mbar).
The month with the lowest atmospheric pressure is January (998.3mbar).
Average wind speed in September
Höfn, Iceland
- Average wind speed in September: 20.7km/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 July (15.7km/h).
Average humidity in September
Höfn, Iceland
- Average humidity in September: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is December (77%).
Average rainfall in September
Höfn, Iceland
- Average rainfall in September: 125mm
The wettest month (with the highest rainfall) is February (151mm).
The driest month (with the least rainfall) is June (47mm).
Average rainfall days in September
Höfn, Iceland
- Average rainfall days in September: 18.9 days
The month with the highest number of rainy days is October (19.5 days).
The month with the least rainy days is June (13.1 days).
Average snowfall in September
Höfn, Iceland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (133mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Höfn, Iceland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (11.2 days).
The months with the least snowfall days are July, August and September (0 days).
Average sea temperature in September
Höfn, Iceland
- Average sea temperature in September: 9.3°C
The best month for swimming (with the highest average sea temperature) is August (10.5°C).
The coldest months (with the lowest average sea temperature) are January and March (5.8°C).
Average daylight in September /
Average sunshine in September
Höfn, Iceland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 54min).
The month with the shortest days is December (Average daylight: 4h and 18min).
- Average sunshine in September: 6h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Höfn, Iceland
- Average sunshine days in September: 8.2 days
The month with the most sunshine days is June (13.3 days).
The month with the least sunshine days is March (6.7 days).
Average UV index in September
Höfn, Iceland
- Average UV index in September: 2
The months with the highest UV index are June, July and August (UV index 3).
The months with the lowest UV index are January, February, March, April, May, September, October, November and December (UV index 2).
Average cloud cover in September
Höfn, Iceland
- Average cloud cover in September: 57
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is December (Cloud cover 54).
Average visibility in September
Höfn, Iceland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Höfn, Iceland
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