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, marked by an average high-temperature of 7.1°C (44.8°F) and a low-temperature of 4.3°C (39.7°F), is the coldest month.Humidity
In January, the average relative humidity is 84%.Rainfall
In Portstewart, in January, it is raining for 20.3 days, with typically 49mm (1.93") of accumulated precipitation. Throughout the year, there are 238.3 rainfall days, and 632mm (24.88") of precipitation is accumulated.Snowfall
Months with snowfall in Portstewart are January through April, November and December. In January, in Portstewart, it is snowing for 2.2 days. Throughout January, 10mm (0.39") of snow is accumulated. In Portstewart, during the entire year, snow falls for 8 days and aggregates up to 47mm (1.85") of snow.Sea temperature
In January, the average sea temperature is 9.1°C (48.4°F).Note: It is advised against swimming in 9.1°C (48.4°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
In Portstewart, 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, in Portstewart, United Kingdom, sunrise is at 8:20 am and sunset at 4:59 pm GMT.
Sunshine
The month with the least sunshine is January, with an average of 3.8h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest month in Portstewart?
What is the temperature in January in Portstewart?
What is the average humidity in January in Portstewart?
How much does it rain in Portstewart in January?
How many days does it snow in January in Portstewart?
How cold is the water in January in Portstewart?
How many hours of daylight does Portstewart have in January?
What time are sunrise and sunset in January in Portstewart?
What is the month with the least sunshine in Portstewart?
How many hours of sunshine does Portstewart have in January?
What are the months with the lowest UV index in Portstewart?
How high is the UV index in January in Portstewart?
Average temperature in January
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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
Portstewart, 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).
Portstewart, United Kingdom
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