January weather forecastCalais, Guernsey

January

Weather in January

The year in Calais, Guernsey begins with January characterized by cool temperatures, with frequent rainfall signifying a wet start to the year. The lowest average temperature falls at 7.8°C (46°F) while the highest stands at 9.8°C (49.6°F). Prolonged wet spells may happen every now and then due to the average rainfall of 63mm (2.48") spread across 22 days. The city's winter gusts may reach an average peak of 47.7km/h (29.6mph), wrapping the coastal city in a wintry mix of rainfall and strong winds. Daylight graces Calais for approximately 8.7 hours, leaving majority of the day under the cover of the January cloud cover.

Temperature

The shift to January in Calais signals an average high-temperature of a chilly 9.8°C (49.6°F), subtly varied from December's 11.1°C (52°F). During the nights of January, the average low-temperature holds at a still frosty 7.8°C (46°F).

Humidity

The average relative humidity in January is 78%.

Rainfall

In Calais, in January, it is raining for 22 days, with typically 63mm (2.48") of accumulated precipitation. In Calais, 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 Calais is January. January is the month with the most snowfall in Calais. Snow falls for 0.3 days and accumulates 2mm (0.08") of snow.

Daylight

In January, the average length of the day in Calais is 8h and 43min.
On the first day of the month, sunrise is at 08:05 and sunset at 16:21. On the last day of January, in Calais, 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

The average daily maximum UV index in January in Calais is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 3 during January leads to these advisories:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Calais, in January, the average high-temperature is 9.8°C (49.6°F), and the average low-temperature is 7.8°C (46°F).

In January, the average relative humidity in Calais, Guernsey, is 78%.

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

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

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

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

On the first day of January in Calais, Guernsey, sunrise is at 08:05 and sunset at 16:21. On the last day of the month, sunrise is at 07:43 and sunset at 17:03 GMT.

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

In January, the average sunshine duration in Calais, Guernsey, is 3.9h.

In January, the average daily maximum UV index in Calais, Guernsey, is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

11.1°C

9.8°C

9.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

37.8km/h

35.8km/h

35.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

5.3

5.5

6.9

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Calais, 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).

Average pressure in January
Calais, 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).

Average wind speed in January
Calais, 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).

Average humidity in January
Calais, 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%).

Average rainfall in January
Calais, 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).

Average rainfall days in January
Calais, 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).

Average snowfall in January
Calais, 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).

Average snowfall days in January
Calais, 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).

Average daylight in January /
Average sunshine in January
Calais, Guernsey

Average daylight in January: 8h and 42min

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 18min).

Average sunshine in January: 3h and 54min

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 January
Calais, 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).

Average UV index in January
Calais, 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).

Average cloud cover in January
Calais, 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).

Average visibility in January
Calais, 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).