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 stands out as Gretna's coldest month, with temperatures ranging between an average high of 5.2°C (41.4°F) and a low of 1.3°C (34.3°F).Humidity
January, November and December, with an average relative humidity of 89%, are the most humid months in Gretna, United Kingdom.Rainfall
In Gretna, United Kingdom, in January, during 17.8 rainfall days, 40mm (1.57") of precipitation is typically accumulated. Throughout the year, in Gretna, there are 204.6 rainfall days, and 478mm (18.82") of precipitation is accumulated.Snowfall
January through April and December are months with snowfall in Gretna. January is the month with the most snowfall. Snow falls for 2.7 days and accumulates 22mm (0.87") of snow.Sea temperature
In Gretna, the average seawater temperature in January is 7.6°C (45.7°F).Note: Engaging in a swim in 7.6°C (45.7°F) can threaten life. Brief exposure to 13°C (55.4°F) waters is uneasy, and submersion below 10°C (50°F) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
In January, the average length of the day in Gretna, United Kingdom, is 7h and 55min.On the first day of January in Gretna, sunrise is at 8:36 am and sunset at 3:54 pm. On the last day of the month, sunrise is at 8:05 am and sunset at 4:45 pm GMT.
Sunshine
In January, the average sunshine in Gretna is 3.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 2 during January translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the coldest months in Gretna?
How cold is January in Gretna?
What is the most humid month in Gretna?
What is the average humidity in January in Gretna?
How many days does it rain in January in Gretna?
What is the snowiest month in Gretna?
How many days does it snow in January in Gretna?
What is the sea water temperature in January in Gretna?
What is the average length of the day in January in Gretna?
When is the sunrise / sunset in January in Gretna?
How long on average sun shines in January in Gretna?
What is the month with the lowest UV index in Gretna?
What is the UV index intensity in January in Gretna?
Average temperature in January
Gretna, United Kingdom
- Average high temperature in January: 5.2°C
The warmest month (with the highest average high temperature) is July (17.5°C).
The month with the lowest average high temperature is January (5.2°C).
- Average low temperature in January: 1.3°C
The month with the highest average low temperature is August (10.3°C).
The coldest months (with the lowest average low temperature) are January and February (1.3°C).
Average pressure in January
Gretna, United Kingdom
- Average pressure in January: 1010.3mbar
The month with the highest atmospheric pressure is May (1015.8mbar).
The month with the lowest atmospheric pressure is November (1007.7mbar).
Average wind speed in January
Gretna, United Kingdom
- Average wind speed in January: 18.2km/h
The windiest month (with the highest average wind speed) is December (18.4km/h).
The calmest months (with the lowest average wind speed) are June and July (12.5km/h).
Average humidity in January
Gretna, United Kingdom
- Average humidity in January: 89%
The months with the highest relative humidity are January, November and December (89%).
The month with the lowest relative humidity is April (82%).
Average rainfall in January
Gretna, United Kingdom
- Average rainfall in January: 40mm
The wettest month (with the highest rainfall) is December (55mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in January
Gretna, United Kingdom
- Average rainfall days in January: 17.8 days
The month with the highest number of rainy days is August (19.9 days).
The month with the least rainy days is April (13.3 days).
Average snowfall in January
Gretna, United Kingdom
- Average snowfall in January: 22mm
The month with the highest snowfall is January (22mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in January
Gretna, United Kingdom
- Average snowfall days in January: 2.7 days
The month with the highest number of snowfall days is January (2.7 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average sea temperature in January
Gretna, United Kingdom
- Average sea temperature in January: 7.6°C
The best month for swimming (with the highest average sea temperature) is August (15.8°C).
The coldest month (with the lowest average sea temperature) is February (7.1°C).
Average daylight in January /
Average sunshine in January
Gretna, 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 18min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is May (Average sunshine: 7h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in January
Gretna, United Kingdom
- Average sunshine days in January: 9.3 days
The month with the most sunshine days is April (13 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in January
Gretna, 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
Gretna, United Kingdom
- Average cloud cover in January: 62
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 51).
Average visibility in January
Gretna, United Kingdom
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, October, November and December (9km).
The months with the lowest visibility are June, July, August and September (8km).
Gretna, United Kingdom
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