August weather forecast
Clos du Valle, Guernsey

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Weather in August

August in Guernsey enjoys an extension of the warmth from July. However, in contradiction to the continued heat, rainfall levels see a significant increase to 41mm (1.61"). The month’s tumultuous mix of sunshine and showers creates its unique charm. While the weather can be unpredictable, the warm temperatures and abundant sunshine make for great sightseeing. It's an excellent time to explore the island’s scenic trails and historic sites.

Temperature

The temperatures in Clos du Valle reach their highest averages in August, with highs of 17.8°C (64°F) and lows of 15.8°C (60.4°F).

Humidity

In Clos du Valle, Guernsey, the average relative humidity in August is 82%.

Rainfall

In Clos du Valle, during August, the rain falls for 14 days and regularly aggregates up to 41mm (1.61") of precipitation. Throughout the year, there are 196.3 rainfall days, and 557mm (21.93") of precipitation is accumulated.

Snowfall

February through December are months without snowfall in Clos du Valle, Guernsey.

Daylight

The average length of the day in August in Clos du Valle is 14h and 22min.
On the first day of August in Clos du Valle, Guernsey, sunrise is at 05:42 and sunset at 20:50. On the last day of the month, sunrise is at 06:25 and sunset at 19:55 BST.

Sunshine

In Clos du Valle, the average sunshine in August is 9.2h.

UV index

The months with the highest UV index in Clos du Valle are July through September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 5 translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Frequently asked questions

What is the warmest month in Clos du Valle?

In Clos du Valle, August registers the highest temperatures, averaging 17.8°C (64°F) at the peak and 15.8°C (60.4°F) at the lowest.

What is the temperature in August in Clos du Valle?

The high-temperature, in August, in Clos du Valle, records 17.8°C (64°F), while the low-temperature is 15.8°C (60.4°F).

What is the average humidity in August in Clos du Valle?

In Clos du Valle, Guernsey, the average relative humidity in August is 82%.

How much does it rain in Clos du Valle in August?

In Clos du Valle, during August, the rain falls for 14 days and regularly aggregates up to 41mm (1.61") of precipitation.

When it does not snow in Clos du Valle?

In Clos du Valle, snow does not fall in February through December.

How many hours of daylight does Clos du Valle have in August?

The average day length in August in Clos du Valle, Guernsey, is 14h and 22min.

What time are sunrise and sunset in August in Clos du Valle?

On the first day of August, sunrise is at 05:42 and sunset at 20:50. On the last day of the month, sunrise is at 06:25 and sunset at 19:55 BST.

How many hours of sunshine does Clos du Valle have in August?

The average sunshine duration in August is 9.2h.

What is the month with the highest UV index in Clos du Valle?

The months with the highest UV index are July through September, with an average maximum UV index of 5.

What is the UV index reading in August in Clos du Valle?

The average daily maximum UV index in August in Clos du Valle is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
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
Clos du Valle, Guernsey

Average temperature in August - Clos du Valle, Guernsey
  • Average high temperature in August: 17.8°C

The warmest month (with the highest average high temperature) is August (17.8°C).
The month with the lowest average high temperature is February (9.2°C).

  • Average low temperature in August: 15.8°C

The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (7°C).

Average pressure in August
Clos du Valle, Guernsey

Average pressure in August - Clos du Valle, Guernsey
  • Average pressure in August: 1016.4mbar

The month with the highest atmospheric pressure is September (1017.9mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).

Average wind speed in August
Clos du Valle, Guernsey

Average wind speed in August - Clos du Valle, Guernsey
  • Average wind speed in August: 22.8km/h

The windiest month (with the highest average wind speed) is December (36km/h).
The calmest month (with the lowest average wind speed) is July (21.9km/h).

Average humidity in August
Clos du Valle, Guernsey

Average humidity in August - Clos du Valle, Guernsey
  • Average humidity in August: 82%

The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are November and December (77%).

Average rainfall in August
Clos du Valle, Guernsey

Average rainfall in August - Clos du Valle, Guernsey
  • Average rainfall in August: 41mm

The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is July (26mm).

Average rainfall days in August
Clos du Valle, Guernsey

Average rainfall days in August - Clos du Valle, Guernsey
  • Average rainfall days in August: 14 days

The month with the highest number of rainy days is November (22.8 days).
The month with the least rainy days is June (11.5 days).

Average snowfall in August
Clos du Valle, Guernsey

Average snowfall in August - Clos du Valle, Guernsey
  • Average snowfall in August: 0mm

The month with the highest snowfall is January (2mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).

Average snowfall days in August
Clos du Valle, Guernsey

Average snowfall days in August - Clos du Valle, Guernsey
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average daylight in August /
Average sunshine in August
Clos du Valle, Guernsey

Average daylight in August / Average sunshine in August - Clos du Valle, Guernsey
  • Average daylight in August: 14h and 2min

The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).

  • Average sunshine in August: 9h and 1min

The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January, November and December (Average sunshine: 3h and 54min).

Average sunshine days in August
Clos du Valle, Guernsey

Average sunshine days in August - Clos du Valle, Guernsey
  • Average sunshine days in August: 12.1 days

The month with the most sunshine days is May (16.3 days).
The month with the least sunshine days is November (4 days).

Average UV index in August
Clos du Valle, Guernsey

Average UV index in August - Clos du Valle, Guernsey
  • Average UV index in August: 5

The months with the highest UV index are July, August and September (UV index 5).
The month with the lowest UV index is February (UV index 2).

Average cloud cover in August
Clos du Valle, Guernsey

Average cloud cover in August - Clos du Valle, Guernsey
  • Average cloud cover in August: 40

The months with the most cloud cover are November and December (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in August
Clos du Valle, Guernsey

Average visibility in August - Clos du Valle, Guernsey
  • Average visibility in August: 10km

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

Clos du Valle, Guernsey

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