January weather forecast
Saint Peter Port, Guernsey

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A calm sunny day in Saint Peter Port, Guernsey, with ships docked at the harbor
A calm sunny day in Saint Peter Port, Guernsey, with ships docked at the harbor

Weather in January

The year in Saint Peter Port, Guernsey begins with January, a month notable for relatively cool temperatures and high rainfall, accentuated by 63mm (2.48") of rain across 22 rainy days. The chill in the air is signaled by relatively low sea temperatures and the presence of snowfall, though it must be noted that snow remains an uncommon occurrence. Meanwhile, the wind starts to make its presence felt with brisk speeds taking the mercury down a notch. The daylight hours are short and the UV index low, underlining the clear dominance of winter.

Temperature

January registers an average high-temperature of a chilly 9.8°C (49.6°F), slightly varied from December's 11.1°C (52°F). Saint Peter Port consistently logs a low temperature averaging a still frosty 7.8°C (46°F) during January, a modest drop from daytime temperatures.

Humidity

In January, the average relative humidity in Saint Peter Port is 78%.

Rainfall

In Saint Peter Port, during January, the rain falls for 22 days and regularly aggregates up to 63mm (2.48") of precipitation. In Saint Peter Port, during the entire year, the rain falls for 196.3 days and collects up to 557mm (21.93") of precipitation.

Snowfall

The only month with snowfall in Saint Peter Port is January. The month with the most snowfall in Saint Peter Port is January, when snow falls for 0.3 days and typically aggregates up to 2mm (0.08") of snow.

Sea temperature

In Saint Peter Port, the average seawater temperature in January is 10°C (50°F).
Note: In 10°C (50°F), cold shock and rapid breathing can occur when swimming at temperatures below 10°C (50°F).

Daylight

The average length of the day in January is 8h and 43min.
On the first day of the month, sunrise is at 08:06 and sunset at 16:20. On the last day of January, sunrise is at 07:43 and sunset at 17:03 GMT.

Sunshine

January, November and December, with an average of 3.9h of sunshine, are months with the least sunshine.

UV index

In January, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: During January, 3 as the daily maximum UV index converts into the following advice:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What is the temperature in January in Saint Peter Port?

An average high-temperature, in January, in Saint Peter Port, is 9.8°C (49.6°F) and the average low-temperature is 7.8°C (46°F).

What is the average humidity in January in Saint Peter Port?

In January, the average relative humidity is 78%.

How much does it rain in Saint Peter Port in January?

In January, in Saint Peter Port, the rain falls for 22 days. Throughout January, 63mm (2.48") of precipitation is accumulated.

When does it snow the most in Saint Peter Port?

January is the month with the most snowfall in Saint Peter Port. Snow falls for 0.3 days and accumulates 2mm (0.08") of snow.

When does it start to snow in Saint Peter Port?

January is the first month it typically snows in Saint Peter Port, Guernsey. Throughout January, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow.

What is the water temperature in January in Saint Peter Port?

In January, the average sea temperature in Saint Peter Port, Guernsey, is 10°C (50°F). Swimming in 10°C (50°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Saint Peter Port?

In Saint Peter Port, Guernsey, the average day length in January is 8h and 43min.

When is the sunrise / sunset in January in Saint Peter Port?

On the first day of January in Saint Peter Port, sunrise is at 08:06 and sunset at 16:20. On the last day of the month, sunrise is at 07:43 and sunset at 17:03 GMT.

What are the months with the least sunshine in Saint Peter Port?

January, November and December, with an average of 3.9h of sunshine, are months with the least sunshine in Saint Peter Port, Guernsey.

How many hours of sunshine does Saint Peter Port have in January?

The average sunshine duration in January in Saint Peter Port, Guernsey, is 3.9h.

What is the UV index intensity in January in Saint Peter Port?

The average daily maximum UV index in January in Saint Peter Port is 3. A UV Index reading of 3 to 5 represents a moderate health threat 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 January
Saint Peter Port, Guernsey

Average temperature in January - Saint Peter Port, Guernsey
  • Average high temperature in January: 9.8°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 January: 7.8°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).

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Average pressure in January
Saint Peter Port, Guernsey

Average pressure in January - Saint Peter Port, Guernsey
  • Average pressure in January: 1016.1mbar

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 January
Saint Peter Port, Guernsey

Average wind speed in January - Saint Peter Port, Guernsey
  • Average wind speed in January: 34.1km/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 January
Saint Peter Port, Guernsey

Average humidity in January - Saint Peter Port, Guernsey
  • Average humidity in January: 78%

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 January
Saint Peter Port, Guernsey

Average rainfall in January - Saint Peter Port, Guernsey
  • Average rainfall in January: 63mm

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 January
Saint Peter Port, Guernsey

Average rainfall days in January - Saint Peter Port, Guernsey
  • Average rainfall days in January: 22 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 January
Saint Peter Port, Guernsey

Average snowfall in January - Saint Peter Port, Guernsey
  • Average snowfall in January: 2mm

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 January
Saint Peter Port, Guernsey

Average snowfall days in January - Saint Peter Port, Guernsey
  • Average snowfall days in January: 0.3 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 sea temperature in January
Saint Peter Port, Guernsey

Average sea temperature in January - Saint Peter Port, Guernsey
  • Average sea temperature in January: 10°C

The best month for swimming (with the highest average sea temperature) is August (17°C).
The coldest months (with the lowest average sea temperature) are February and March (9°C).

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Average daylight in January /
Average sunshine in January
Saint Peter Port, Guernsey

Average daylight in January / Average sunshine in January - Saint Peter Port, Guernsey
  • Average daylight in January: 8h 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 January: 3h and 5min

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 January
Saint Peter Port, Guernsey

Average sunshine days in January - Saint Peter Port, Guernsey
  • Average sunshine days in January: 5.5 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 January
Saint Peter Port, Guernsey

Average UV index in January - Saint Peter Port, Guernsey
  • Average UV index in January: 3

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 January
Saint Peter Port, Guernsey

Average cloud cover in January - Saint Peter Port, Guernsey
  • Average cloud cover in January: 62

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 January
Saint Peter Port, Guernsey

Average visibility in January - Saint Peter Port, Guernsey
  • Average visibility in January: 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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Saint Peter Port, Guernsey

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