Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January brings the lowest temperatures in Belfast, with an average high of 6.8°C (44.2°F) and an average low of 3.1°C (37.6°F).Humidity
January and December, with an average relative humidity of 88%, are the most humid months in Belfast.Rainfall
In Belfast, in January, it is raining for 18 days, with typically 45mm (1.77") of accumulated precipitation. Throughout the year, in Belfast, United Kingdom, there are 220.2 rainfall days, and 626mm (24.65") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Belfast. In Belfast, United Kingdom, in January, snow falls for 2.5 days, with typically accumulated 10mm (0.39") of snow. In Belfast, during the entire year, snow falls for 8.2 days and aggregates up to 47mm (1.85") of snow.Sea temperature
In January, the average sea temperature is 8.8°C (47.8°F).Note: Swimming in 8.8°C (47.8°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.
Daylight
In January, the average length of the day is 7h and 58min.On the first day of January, sunrise is at 8:45 am and sunset at 4:08 pm. On the last day of the month, sunrise is at 8:15 am and sunset at 4:59 pm GMT.
Sunshine
The average sunshine in January in Belfast, United Kingdom, is 3.7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Belfast. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In January, the UV index of 2 transforms into the following advice:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What part of the year is the coldest in Belfast?
How cold is it in Belfast in January?
What is the most humid month in Belfast?
What is the average humidity in January in Belfast?
How much does it rain in Belfast in January?
How many days does it snow in January in Belfast?
What is the sea water temperature in January in Belfast?
What is the average length of the day in January in Belfast?
When is the sunrise / sunset in January in Belfast?
How long on average sun shines in January in Belfast?
When is the lowest UV index in Belfast?
What is the UV index intensity in January in Belfast?
Average temperature in January
Belfast, United Kingdom
- Average high temperature in January: 6.8°C
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in January: 3.1°C
The month with the highest average low temperature is August (11.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).
Average pressure in January
Belfast, United Kingdom
- Average pressure in January: 1009.9mbar
The month with the highest atmospheric pressure is May (1015.6mbar).
The month with the lowest atmospheric pressure is November (1007.3mbar).
Average wind speed in January
Belfast, United Kingdom
- Average wind speed in January: 21.3km/h
The windiest month (with the highest average wind speed) is January (21.3km/h).
The calmest months (with the lowest average wind speed) are June and July (13.7km/h).
Average humidity in January
Belfast, United Kingdom
- Average humidity in January: 88%
The months with the highest relative humidity are January and December (88%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in January
Belfast, United Kingdom
- Average rainfall in January: 45mm
The wettest month (with the highest rainfall) is August (72mm).
The driest month (with the least rainfall) is May (38mm).
Average rainfall days in January
Belfast, United Kingdom
- Average rainfall days in January: 18 days
The month with the highest number of rainy days is August (23 days).
The month with the least rainy days is April (16.1 days).
Average snowfall in January
Belfast, United Kingdom
- Average snowfall in January: 10mm
The month with the highest snowfall is February (25mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in January
Belfast, United Kingdom
- Average snowfall days in January: 2.5 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in January
Belfast, United Kingdom
- Average sea temperature in January: 8.8°C
The best month for swimming (with the highest average sea temperature) is September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8°C).
Average daylight in January /
Average sunshine in January
Belfast, United Kingdom
- Average daylight in January: 8h and 0min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is June (Average sunshine: 7h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in January
Belfast, United Kingdom
- Average sunshine days in January: 9.2 days
The month with the most sunshine days is April (11.5 days).
The month with the least sunshine days is August (5.6 days).
Average UV index in January
Belfast, United Kingdom
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Belfast, United Kingdom
- Average cloud cover in January: 63
The months with the most cloud cover are January and February (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 55).
Average visibility in January
Belfast, United Kingdom
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Belfast, United Kingdom
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