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
January
Weather in January
Temperature
In Rostrevor, January is the month with the lowest recorded average temperatures, measuring a high of 6.7°C (44.1°F) and a low of 3.3°C (37.9°F).Humidity
In January, the average relative humidity is 87%.Rainfall
January and April are months with the least rain when the rain falls for 13.6 days and typically aggregates up to 35mm (1.38") of rain.Snowfall
Months with snowfall are January through April, November and December. In January, it is snowing for 3.5 days. Throughout January, 37mm (1.46") of snow is accumulated. Throughout the year, there are 13.2 snowfall days, and 128mm (5.04") of snow is accumulated.Sea temperature
In January, the average sea temperature is 9.3°C (48.7°F).Note: Entering waters of 9.3°C (48.7°F) is life-endangering. A mere moment in 13°C (55.4°F) waters feels piercing cold, and below 10°C (50°F) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
In Rostrevor, the average length of the day in January is 8h and 4min.On the first day of the month, sunrise is at 8:44 am and sunset at 4:12 pm. On the last day of January, sunrise is at 8:14 am and sunset at 5:02 pm GMT.
Sunshine
The average sunshine in January in Rostrevor is 3.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: An average maximum UV index of 2 in January leads to these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
Is January cold?
What is the average humidity in January?
What is the driest month in Rostrevor?
How many days does it rain in January?
How many days does it snow in January?
How cold is the water in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Rostrevor, United Kingdom
- Average high temperature in January: 6.7°C
The warmest months (with the highest average high temperature) are July and August (16.4°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in January: 3.3°C
The month with the highest average low temperature is August (11.5°C).
The coldest month (with the lowest average low temperature) is February (3.1°C).
Average pressure in January
Rostrevor, United Kingdom
- Average pressure in January: 1010.5mbar
The month with the highest atmospheric pressure is May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1007.6mbar).
Average wind speed in January
Rostrevor, United Kingdom
- Average wind speed in January: 22.8km/h
The windiest month (with the highest average wind speed) is January (22.8km/h).
The calmest months (with the lowest average wind speed) are June and July (14.2km/h).
Average humidity in January
Rostrevor, United Kingdom
- Average humidity in January: 87%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are March, April and May (84%).
Average rainfall in January
Rostrevor, United Kingdom
- Average rainfall in January: 35mm
The wettest month (with the highest rainfall) is August (66mm).
The driest months (with the least rainfall) are January and April (35mm).
Average rainfall days in January
Rostrevor, United Kingdom
- Average rainfall days in January: 13.6 days
The month with the highest number of rainy days is August (21.6 days).
The month with the least rainy days is February (13.5 days).
Average snowfall in January
Rostrevor, United Kingdom
- Average snowfall in January: 37mm
The month with the highest snowfall is February (40mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in January
Rostrevor, United Kingdom
- Average snowfall days in January: 3.5 days
The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in January
Rostrevor, United Kingdom
- Average sea temperature in January: 9.3°C
The best month for swimming (with the highest average sea temperature) is August (14.7°C).
The coldest month (with the lowest average sea temperature) is March (8.3°C).
Average daylight in January /
Average sunshine in January
Rostrevor, United Kingdom
- Average daylight in January: 8h and 1min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 30min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is June (Average sunshine: 7h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in January
Rostrevor, United Kingdom
- Average sunshine days in January: 12 days
The months with the most sunshine days are January and November (12 days).
The month with the least sunshine days is August (6.1 days).
Average UV index in January
Rostrevor, 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
Rostrevor, United Kingdom
- Average cloud cover in January: 61
The months with the most cloud cover are January and February (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in January
Rostrevor, 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).
