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 is the month when Portrush experiences its coldest temperatures, averaging a high of 7.1°C (44.8°F) and a low of 4.3°C (39.7°F).Humidity
In Portrush, the average relative humidity in January is 84%.Rainfall
In January, in Portrush, United Kingdom, the rain falls for 20.3 days. Throughout January, 49mm (1.93") of precipitation is accumulated. In Portrush, during the entire year, the rain falls for 238.3 days and collects up to 632mm (24.88") of precipitation.Snowfall
Months with snowfall in Portrush are January through April, November and December. In Portrush, during January, snow falls for 2.2 days and regularly aggregates up to 10mm (0.39") of snow. Throughout the year, there are 8 snowfall days, and 47mm (1.85") of snow is accumulated.Sea temperature
In Portrush, United Kingdom, in January, the average water temperature is 9.1°C (48.4°F).Note: You can swim in 9.1°C (48.4°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.
Daylight
In Portrush, the average length of the day in January is 7h and 52min.On the first day of the month, sunrise is at 8:52 am and sunset at 4:07 pm. On the last day of January, sunrise is at 8:20 am and sunset at 4:59 pm GMT.
Sunshine
January has the least sunshine of the year, with an average of 3.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Portrush. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In January, the maximum UV index of 2 translates into these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What is the coldest month in Portrush?
What are the temperatures in Portrush in January?
What is the average humidity in January in Portrush?
How many days does it rain in January in Portrush?
How much does it snow in Portrush in January?
How cold is the water in January in Portrush?
What is the average length of the day in January in Portrush?
When are sunrise and sunset in January in Portrush?
What is the month with the least sunshine in Portrush?
How long on average sun shines in January in Portrush?
When is the lowest UV index in Portrush?
What is the UV index intensity in January in Portrush?
Average temperature in January
Portrush, United Kingdom
- Average high temperature in January: 7.1°C
The warmest month (with the highest average high temperature) is July (16°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in January: 4.3°C
The month with the highest average low temperature is August (11.8°C).
The coldest month (with the lowest average low temperature) is February (4°C).
Average pressure in January
Portrush, United Kingdom
- Average pressure in January: 1008.9mbar
The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in January
Portrush, United Kingdom
- Average wind speed in January: 27.5km/h
The windiest month (with the highest average wind speed) is January (27.5km/h).
The calmest month (with the lowest average wind speed) is July (16.7km/h).
Average humidity in January
Portrush, United Kingdom
- Average humidity in January: 84%
The months with the highest relative humidity are July and August (86%).
The month with the lowest relative humidity is April (81%).
Average rainfall in January
Portrush, United Kingdom
- Average rainfall in January: 49mm
The wettest months (with the highest rainfall) are July and August (74mm).
The driest month (with the least rainfall) is April (35mm).
Average rainfall days in January
Portrush, United Kingdom
- Average rainfall days in January: 20.3 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is April (16.8 days).
Average snowfall in January
Portrush, United Kingdom
- Average snowfall in January: 10mm
The month with the highest snowfall is February (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in January
Portrush, United Kingdom
- Average snowfall days in January: 2.2 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in January
Portrush, United Kingdom
- Average sea temperature in January: 9.1°C
The best month for swimming (with the highest average sea temperature) is August (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in January /
Average sunshine in January
Portrush, United Kingdom
- Average daylight in January: 7h and 5min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 12min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is June (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in January
Portrush, United Kingdom
- Average sunshine days in January: 7.5 days
The month with the most sunshine days is April (9.8 days).
The month with the least sunshine days is August (4.2 days).
Average UV index in January
Portrush, United Kingdom
- Average UV index in January: 2
The months with the highest UV index are May, June, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Portrush, United Kingdom
- Average cloud cover in January: 63
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in January
Portrush, United Kingdom
- Average visibility in January: 9km
The month with the highest visibility is November (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
Portrush, United Kingdom
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