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
January, having an average high-temperature of 6.4°C (43.5°F) and an average low-temperature of 1.6°C (34.9°F), is the coldest month.Humidity
In Radlett, the average relative humidity in January is 89%.Rainfall
In Radlett, in January, it is raining for 12 days, with typically 24mm (0.94") of accumulated precipitation. In Radlett, during the entire year, the rain falls for 159.2 days and collects up to 359mm (14.13") of precipitation.Snowfall
Months with snowfall are January through March, November and December. In January, in Radlett, it is snowing for 2.9 days. Throughout January, 14mm (0.55") of snow is accumulated. In Radlett, during the entire year, snow falls for 10.1 days and aggregates up to 59mm (2.32") of snow.Daylight
The average length of the day in January in Radlett, United Kingdom, is 8h and 25min.On the first day of January in Radlett, sunrise is at 8:07 am and sunset at 4:01 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 4:47 pm GMT.
Sunshine
The average sunshine in January in Radlett is 4.3h.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 rays for the ordinary person.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Radlett?
How cold is it in Radlett in January?
What is the average humidity in January in Radlett?
How much does it rain in Radlett in January?
How many days does it snow in January in Radlett?
How many hours of daylight does Radlett have in January?
When is the sunrise / sunset in January in Radlett?
How many hours of sunshine does Radlett have in January?
What are the months with the lowest UV index in Radlett?
How high is the UV index in January in Radlett?
Average temperature in January
Radlett, United Kingdom
- Average high temperature in January: 6.4°C
The warmest month (with the highest average high temperature) is July (21.6°C).
The month with the lowest average high temperature is January (6.4°C).
- Average low temperature in January: 1.6°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in January
Radlett, United Kingdom
- Average pressure in January: 1014.3mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in January
Radlett, United Kingdom
- Average wind speed in January: 17.4km/h
The windiest month (with the highest average wind speed) is February (18.2km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in January
Radlett, United Kingdom
- Average humidity in January: 89%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (76%).
Average rainfall in January
Radlett, United Kingdom
- Average rainfall in January: 24mm
The wettest month (with the highest rainfall) is June (44mm).
The driest month (with the least rainfall) is September (19mm).
Average rainfall days in January
Radlett, United Kingdom
- Average rainfall days in January: 12 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is September (10.7 days).
Average snowfall in January
Radlett, United Kingdom
- Average snowfall in January: 14mm
The month with the highest snowfall is December (20mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in January
Radlett, United Kingdom
- Average snowfall days in January: 2.9 days
The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Radlett, United Kingdom
- Average daylight in January: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in January: 4h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in January
Radlett, United Kingdom
- Average sunshine days in January: 14.8 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in January
Radlett, United Kingdom
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Radlett, United Kingdom
- Average cloud cover in January: 57
The months with the most cloud cover are February and November (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in January
Radlett, United Kingdom
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
