September weather forecast
Carmel, Guernsey

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Weather in September

September signals the end of summer as Carmel, Guernsey begins transitioning into autumn. It is a crucial transition, as temperatures start descending from the summer's heat, providing relief. Winds remain relatively steady, causing the climate to be more stable than in previous months. Despite the change to autumn, daylight hours persist at a partially considerable length, supporting outdoor activities. Average sea temperatures start to fall gradually, making sea bathing less desirable.

Temperature

Carmel, Guernsey, marks the arrival of September with an average high-temperature of a still comfortable 17.2°C (63°F), hardly different from August's 17.8°C (64°F). In Carmel, a slight decrease from the daytime peak is noted during the month of September, with an average low-temperature of 15.4°C (59.7°F).

Humidity

In Carmel, the average relative humidity in September is 80%.

Rainfall

In Carmel, in September, it is raining for 13.5 days, with typically 31mm (1.22") of accumulated precipitation. In Carmel, during the entire year, the rain falls for 196.3 days and collects up to 557mm (21.93") of precipitation.

Snowfall

February through December are months without snowfall.

Daylight

The average length of the day in September is 12h and 36min.
On the first day of the month, sunrise is at 06:26 and sunset at 19:53. On the last day of September, sunrise is at 07:09 and sunset at 18:50 BST.

Sunshine

In September, the average sunshine is 8.4h.

UV index

The months with the highest UV index in Carmel 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 exposure to the Sun's UV radiation for the ordinary person.
Note: In September, an average UV index of 5 transforms into the following instructions:
Undertake protective steps - Preventing sun damage is advised. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

What is the average September temperature in Carmel?

In Carmel, 17.2°C (63°F) is the average high-temperature and 15.4°C (59.7°F) is the average low-temperature during September.

What is the average humidity in September in Carmel?

In September, the average relative humidity is 80%.

How much does it rain in Carmel in September?

In Carmel, in September, during 13.5 rainfall days, 31mm (1.22") of precipitation is typically accumulated.

When it does not snow in Carmel?

February through December are months without snowfall in Carmel, Guernsey.

How many hours of daylight does Carmel have in September?

In September, the average day length in Carmel is 12h and 36min.

What time are sunrise and sunset in September in Carmel?

In September, on the first day of the month, sunrise is at 06:26 and sunset at 19:53. On the last day of the month, in Carmel, Guernsey, sunrise is at 07:09 and sunset at 18:50 BST.

How many hours of sunshine does Carmel have in September?

The average sunshine duration in September in Carmel is 8.4h.

What are the months with the highest UV index in Carmel?

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

What is the UV index intensity in September in Carmel?

The average daily maximum UV index in September in Carmel, Guernsey, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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 September
Carmel, Guernsey

Average temperature in September - Carmel, Guernsey
  • Average high temperature in September: 17.2°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 September: 15.4°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).

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Average pressure in September
Carmel, Guernsey

Average pressure in September - Carmel, Guernsey
  • Average pressure in September: 1017.9mbar

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

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Average wind speed in September
Carmel, Guernsey

Average wind speed in September - Carmel, Guernsey
  • Average wind speed in September: 25.8km/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).

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Average humidity in September
Carmel, Guernsey

Average humidity in September - Carmel, Guernsey
  • Average humidity in September: 80%

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

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Average rainfall in September
Carmel, Guernsey

Average rainfall in September - Carmel, Guernsey
  • Average rainfall in September: 31mm

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

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Average rainfall days in September
Carmel, Guernsey

Average rainfall days in September - Carmel, Guernsey
  • Average rainfall days in September: 13.5 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).

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Average snowfall in September
Carmel, Guernsey

Average snowfall in September - Carmel, Guernsey
  • Average snowfall in September: 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).

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Average snowfall days in September
Carmel, Guernsey

Average snowfall days in September - Carmel, Guernsey
  • Average snowfall days in September: 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).

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Average daylight in September /
Average sunshine in September
Carmel, Guernsey

Average daylight in September / Average sunshine in September - Carmel, Guernsey
  • Average daylight in September: 12h and 4min

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 September: 8h and 2min

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).

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Average sunshine days in September
Carmel, Guernsey

Average sunshine days in September - Carmel, Guernsey
  • Average sunshine days in September: 13.1 days

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

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Average UV index in September
Carmel, Guernsey

Average UV index in September - Carmel, Guernsey
  • Average UV index in September: 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).

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Average cloud cover in September
Carmel, Guernsey

Average cloud cover in September - Carmel, Guernsey
  • Average cloud cover in September: 41

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).

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Average visibility in September
Carmel, Guernsey

Average visibility in September - Carmel, Guernsey
  • Average visibility in September: 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).

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Carmel, Guernsey

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