September weather forecast and climate
Úlfsá, Iceland

Weather in September

September, the first month of the autumn, in Úlfsá, is also a frosty month, with average temperature ranging between min 3.9°C (39°F) and max 6.6°C (43.9°F).

Temperature

In September, the average high-temperature is relatively the same as in August - a still chilly 6.6°C (43.9°F). In Úlfsá, the average low-temperature is 3.9°C (39°F).

Humidity

The average relative humidity in Úlfsá, Iceland, is 87%.

Rainfall

In Úlfsá, it is raining for 17.6 days, with typically 55mm (2.17") of accumulated precipitation. Throughout the year, there are 124.6 rainfall days, and 664mm (26.14") of precipitation is accumulated.

Snowfall

January through June, August through December are months with snowfall in Úlfsá. In Úlfsá, snow falls for 1.5 days, with typically accumulated 15mm (0.59") of snow. In Úlfsá, Iceland, during the entire year, snow falls for 96.2 days, and aggregates up to 1214mm (47.8") of snow.

Sea temperature

In September, the average sea temperature in Úlfsá is 6°C (42.8°F).
Note: Swimming in 6°C (42.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Úlfsá, the average length of the day in September is 13.1h.

Sunshine

In Úlfsá, the average sunshine is 3.5h.

UV index

The average daily maximum UV index in Úlfsá is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Úlfsá?

The average relative humidity in September is 87%.

How much does it rain in Úlfsá in September?

In September, in Úlfsá, Iceland, the rain falls for 17.6 days. Throughout September, 55mm (2.17") of precipitation is accumulated.

How many days does it snow in September in Úlfsá?

In Úlfsá, Iceland, in September, during 1.5 snowfall days, 15mm (0.59") of snow is typically accumulated.

How cold is the water in September in Úlfsá?

In Úlfsá, Iceland, the average seawater temperature in September is 6°C (42.8°F). Swimming in 6°C (42.8°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.

How many hours of daylight does Úlfsá have in September?

In Úlfsá, the average length of the day in September is 13.1h.

How long on average sun shines in September in Úlfsá?

The average sunshine in September in Úlfsá, Iceland, is 3.5h.

How high is the UV index in September in Úlfsá?

In September, the average daily maximum UV index in Úlfsá is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Úlfsá, Iceland

Average temperature in September - Úlfsá, Iceland
  • Average high temperature in September: 6.6°C

The warmest month (with the highest average high temperature) is July (9.5°C).
The month with the lowest average high temperature is March (-1°C).

  • Average low temperature in September: 3.9°C

The month with the highest average low temperature is July (6.3°C).
The coldest month (with the lowest average low temperature) is December (-4.3°C).

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Average pressure in September
Úlfsá, Iceland

Average pressure in September - Úlfsá, Iceland
  • Average pressure in September: 1003.4mbar

The month with the highest atmospheric pressure is June (1014.7mbar).
The month with the lowest atmospheric pressure is January (997.3mbar).

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Average wind speed in September
Úlfsá, Iceland

Average wind speed in September - Úlfsá, Iceland
  • Average wind speed in September: 17.4km/h

The windiest months (with the highest average wind speed) are February and December (25.2km/h).
The calmest month (with the lowest average wind speed) is June (13.4km/h).

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Average humidity in September
Úlfsá, Iceland

Average humidity in September - Úlfsá, Iceland
  • Average humidity in September: 87%

Months with the highest relative humidity are January, February, October and December (88%).
The month with the lowest relative humidity is June (81%).

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Average rainfall in September
Úlfsá, Iceland

Average rainfall in September - Úlfsá, Iceland
  • Average rainfall in September: 55mm

The wettest month (with the highest rainfall) is January (88mm).
The driest month (with the least rainfall) is June (20mm).

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Average rainfall days in September
Úlfsá, Iceland

Average rainfall days in September - Úlfsá, Iceland
  • Average rainfall days in September: 17.6 days

The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is December (6.5 days).

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Average snowfall in September
Úlfsá, Iceland

Average snowfall in September - Úlfsá, Iceland
  • Average snowfall in September: 15mm

The month with the highest snowfall is March (249mm).
The month with the least snowfall is July (0mm).

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Average snowfall days in September
Úlfsá, Iceland

Average snowfall days in September - Úlfsá, Iceland
  • Average snowfall days in September: 1.5 days

The month with the highest number of snowfall days is March (17.5 days).
The month with the least snowfall days is July (0 days).

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Average sea temperature in September
Úlfsá, Iceland

Average sea temperature in September - Úlfsá, Iceland
  • Average sea temperature in September: 6°C

The best months for swimming (with the highest average sea temperature) are July and August (7°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (3°C).

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Average daylight in September /
Average sunshine in September
Úlfsá, Iceland

Average daylight in September / Average sunshine in September - Úlfsá, Iceland
  • Average daylight in September: 13.1h

The month with the longest days is June (Average daylight: 23.5h).
The month with the shortest days is December (Average daylight: 3.1h).

  • Average sunshine in September: 3.5h

The month with the most sunshine is August (Average sunshine: 5.8h).
The month with the least sunshine is June (Average sunshine: 0.4h).

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Average sunshine days in September
Úlfsá, Iceland

Average sunshine days in September - Úlfsá, Iceland
  • Average sunshine days in September: 9.5 days

The month with the most sunshine days is June (18 days).
The month with the least sunshine days is February (6.7 days).

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Average UV index in September
Úlfsá, Iceland

Average UV index in September - Úlfsá, Iceland
  • Average UV index in September: 2

The month with the highest UV index is July (UV index 3).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).

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Average cloud cover in September
Úlfsá, Iceland

Average cloud cover in September - Úlfsá, Iceland
  • Average cloud cover in September: 74

The month with the most cloud cover is March (Cloud cover 81).
The month with the least cloud cover is June (Cloud cover 65).

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Average visibility in September
Úlfsá, Iceland

Average visibility in September - Úlfsá, Iceland
  • Average visibility in September: 9km

Months with the highest visibility are May, June, July, August, September and October (9km).
Months with the lowest visibility are January, February, March, April, November and December (8km).

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