August weather forecast
Stykkishólmur, Iceland

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Weather in August

In August, Stykkishólmur experiences a slight drop in temperature when compared to July’s peak. Average rainfall increases to 32mm (1.26"), which is higher than the summer month of July. Nonetheless, the weather generally remains warm enough for outdoor activities. The daylight starts to retreat gradually, and wind speeds pick up again, marking the approaching autumn. However, the city maintains its splendor under the subtle shift in the weather.

Temperature

Upon the onset of August, Stykkishólmur witnesses an average high-temperature of a still cool 11.2°C (52.2°F), showing a close resemblance to the prior month. Stykkishólmur, during August nights, records a temperature marginally cooler than the daytime average, at a frosty 7.7°C (45.9°F).

Humidity

The average relative humidity in August is 82%.

Rainfall

In Stykkishólmur, in August, during 13.8 rainfall days, 32mm (1.26") of precipitation is typically accumulated. Throughout the year, in Stykkishólmur, Iceland, there are 139.6 rainfall days, and 351mm (13.82") of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Stykkishólmur.

Sea temperature

August is the month with the warmest seawater, with an average sea temperature of 10.3°C (50.5°F).
Note: Diving into 10.3°C (50.5°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 13°C (55.4°F) feels ice-cold.

Daylight

In August, the average length of the day in Stykkishólmur is 16h and 32min.
On the first day of August in Stykkishólmur, Iceland, sunrise is at 04:30 and sunset at 22:43. On the last day of the month, sunrise is at 06:09 and sunset at 20:53 GMT.

Sunshine

In Stykkishólmur, the average sunshine in August is 7.1h.

UV index

June through August, with an average maximum UV index of 3, are months with the highest UV index in Stykkishólmur, Iceland. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: A maximum high daily UV index of 3 during August translates into the following directions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What are the temperatures in Stykkishólmur in August?

The high-temperature during August is 11.2°C (52.2°F) and the low-temperature is 7.7°C (45.9°F).

What is the average humidity in August in Stykkishólmur?

In August, the average relative humidity is 82%.

How much does it rain in Stykkishólmur in August?

In Stykkishólmur, during August, the rain falls for 13.8 days and regularly aggregates up to 32mm (1.26") of precipitation.

When it does not snow in Stykkishólmur?

June through September are months without snowfall in Stykkishólmur, Iceland.

When is the sea warmest in Stykkishólmur?

The month with the warmest seawater is August, with an average sea temperature of 10.3°C (50.5°F).

What is the sea water temperature in August in Stykkishólmur?

In Stykkishólmur, Iceland, the average seawater temperature in August is 10.3°C (50.5°F). Swimming in 10.3°C (50.5°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 Stykkishólmur have in August?

The average day length in August in Stykkishólmur is 16h and 32min.

What time are sunrise and sunset in August in Stykkishólmur?

In August, on the first day of the month, sunrise is at 04:30 and sunset at 22:43. On the last day of the month, in Stykkishólmur, Iceland, sunrise is at 06:09 and sunset at 20:53 GMT.

How long on average sun shines in August in Stykkishólmur?

In Stykkishólmur, Iceland, the average sunshine duration in August is 7.1h.

What is the month with the highest UV index in Stykkishólmur?

June through August, with an average maximum UV index of 3, are months with the highest UV index.

How high is the UV index in August in Stykkishólmur?

In Stykkishólmur, Iceland, the average daily maximum UV index in August is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in August
Stykkishólmur, Iceland

Average temperature in August - Stykkishólmur, Iceland
  • Average high temperature in August: 11.2°C

The warmest month (with the highest average high temperature) is July (12.1°C).
The month with the lowest average high temperature is December (0.7°C).

  • Average low temperature in August: 7.7°C

The month with the highest average low temperature is July (8.3°C).
The coldest months (with the lowest average low temperature) are February and December (-1.8°C).

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Average pressure in August
Stykkishólmur, Iceland

Average pressure in August - Stykkishólmur, Iceland
  • Average pressure in August: 1008.3mbar

The month with the highest atmospheric pressure is June (1014.1mbar).
The month with the lowest atmospheric pressure is January (996.7mbar).

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Average wind speed in August
Stykkishólmur, Iceland

Average wind speed in August - Stykkishólmur, Iceland
  • Average wind speed in August: 15.8km/h

The windiest month (with the highest average wind speed) is February (25.9km/h).
The calmest month (with the lowest average wind speed) is June (14.6km/h).

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Average humidity in August
Stykkishólmur, Iceland

Average humidity in August - Stykkishólmur, Iceland
  • Average humidity in August: 82%

The months with the highest relative humidity are January, February and October (83%).
The month with the lowest relative humidity is May (77%).

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Average rainfall in August
Stykkishólmur, Iceland

Average rainfall in August - Stykkishólmur, Iceland
  • Average rainfall in August: 32mm

The wettest month (with the highest rainfall) is January (40mm).
The driest month (with the least rainfall) is July (17mm).

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Average rainfall days in August
Stykkishólmur, Iceland

Average rainfall days in August - Stykkishólmur, Iceland
  • Average rainfall days in August: 13.8 days

The month with the highest number of rainy days is October (15.7 days).
The month with the least rainy days is February (9.1 days).

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Average snowfall in August
Stykkishólmur, Iceland

Average snowfall in August - Stykkishólmur, Iceland
  • Average snowfall in August: 0mm

The month with the highest snowfall is March (97mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in August
Stykkishólmur, Iceland

Average snowfall days in August - Stykkishólmur, Iceland
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (11.6 days).
The months with the least snowfall days are July and August (0 days).

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Average sea temperature in August
Stykkishólmur, Iceland

Average sea temperature in August - Stykkishólmur, Iceland
  • Average sea temperature in August: 10.3°C

The best month for swimming (with the highest average sea temperature) is August (10.3°C).
The coldest month (with the lowest average sea temperature) is March (2.1°C).

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Average daylight in August /
Average sunshine in August
Stykkishólmur, Iceland

Average daylight in August / Average sunshine in August - Stykkishólmur, Iceland
  • Average daylight in August: 16h and 3min

The month with the longest days is June (Average daylight: 21h and 42min).
The month with the shortest days is December (Average daylight: 3h and 48min).

  • Average sunshine in August: 7h and 1min

The month with the most sunshine is May (Average sunshine: 7h and 18min).
The month with the least sunshine is June (Average sunshine: 0h and 48min).

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Average sunshine days in August
Stykkishólmur, Iceland

Average sunshine days in August - Stykkishólmur, Iceland
  • Average sunshine days in August: 13.5 days

The months with the most sunshine days are June and July (16.8 days).
The month with the least sunshine days is March (9.1 days).

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Average UV index in August
Stykkishólmur, Iceland

Average UV index in August - Stykkishólmur, Iceland
  • Average UV index in August: 3

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, April, October, November and December (UV index 1).

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Average cloud cover in August
Stykkishólmur, Iceland

Average cloud cover in August - Stykkishólmur, Iceland
  • Average cloud cover in August: 64

The month with the most cloud cover is March (Cloud cover 72).
The months with the least cloud cover are May and June (Cloud cover 61).

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Average visibility in August
Stykkishólmur, Iceland

Average visibility in August - Stykkishólmur, Iceland
  • Average visibility in August: 9km

The months with the highest visibility are June and July (10km).
The months with the lowest visibility are January, February, March, April, May, August, September, October, November and December (9km).

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Stykkishólmur, Iceland

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