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 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 South Reston, the lowest temperatures are generally noted in January, averaging a high of 6.2°C (43.2°F) and a low of 2.8°C (37°F).Humidity
In South Reston, United Kingdom, the average relative humidity in January is 86%.Rainfall
In South Reston, United Kingdom, during January, the rain falls for 13.3 days and regularly aggregates up to 27mm (1.06") of precipitation. In South Reston, United Kingdom, during the entire year, the rain falls for 165.5 days and collects up to 413mm (16.26") of precipitation.Snowfall
Months with snowfall are January through March, November and December. January is the month with the most snowfall in South Reston. Snow falls for 3.3 days and accumulates 17mm (0.67") of snow.Daylight
The average length of the day in January is 8h and 11min.On the first day of the month, sunrise is at 8:14 am and sunset at 3:51 pm. On the last day of January, in South Reston, sunrise is at 7:46 am and sunset at 4:39 pm GMT.
Sunshine
In South Reston, the average sunshine in January is 4.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in South Reston, United Kingdom. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 2 in January interprets into the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in South Reston?
How cold is January in South Reston?
What is the average humidity in January in South Reston?
How much does it rain in South Reston in January?
What is the snowiest month in South Reston?
How much does it snow in South Reston in January?
How many hours of daylight does South Reston have in January?
When is the sunrise / sunset in January in South Reston?
How many hours of sunshine does South Reston have in January?
When is the lowest UV index in South Reston?
How high is the UV index in January in South Reston?
Average temperature in January
South Reston, United Kingdom
- Average high temperature in January: 6.2°C
The warmest month (with the highest average high temperature) is August (19.8°C).
The month with the lowest average high temperature is January (6.2°C).
- Average low temperature in January: 2.8°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).
Average pressure in January
South Reston, United Kingdom
- Average pressure in January: 1012.6mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.3mbar).
Average wind speed in January
South Reston, United Kingdom
- Average wind speed in January: 21.8km/h
The windiest month (with the highest average wind speed) is December (22.3km/h).
The calmest month (with the lowest average wind speed) is July (14.6km/h).
Average humidity in January
South Reston, United Kingdom
- Average humidity in January: 86%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is August (76%).
Average rainfall in January
South Reston, United Kingdom
- Average rainfall in January: 27mm
The wettest month (with the highest rainfall) is October (48mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in January
South Reston, United Kingdom
- Average rainfall days in January: 13.3 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is September (11.3 days).
Average snowfall in January
South Reston, United Kingdom
- Average snowfall in January: 17mm
The month with the highest snowfall is January (17mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in January
South Reston, United Kingdom
- Average snowfall days in January: 3.3 days
The months with the highest number of snowfall days are January and February (3.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
South Reston, United Kingdom
- Average daylight in January: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January: 4h and 1min
The month with the most sunshine is August (Average sunshine: 8h and 12min).
The months with the least sunshine are February and November (Average sunshine: 3h and 54min).
Average sunshine days in January
South Reston, United Kingdom
- Average sunshine days in January: 12.6 days
The month with the most sunshine days is April (15.7 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in January
South Reston, United Kingdom
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
South Reston, United Kingdom
- Average cloud cover in January: 59
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are April and September (Cloud cover 47).
Average visibility in January
South Reston, United Kingdom
- Average visibility in January: 9km
The months with the highest visibility are March, August, September and October (10km).
The months with the lowest visibility are January, February, April, May, June, July, November and December (9km).
