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
Weather in January
Temperature
January, marked by an average high-temperature of 6.9°C (44.4°F) and a low-temperature of 3.3°C (37.9°F), is the coldest month.Humidity
In Rayleigh, the average relative humidity in January is 86%.Rainfall
In Rayleigh, during January, the rain falls for 12.4 days and regularly aggregates up to 20mm (0.79") of precipitation. In Rayleigh, during the entire year, the rain falls for 148.1 days and collects up to 293mm (11.54") of precipitation.Snowfall
Months with snowfall in Rayleigh, United Kingdom, are January through April, November and December. In Rayleigh, in January, snow falls for 2.3 days, with typically accumulated 9mm (0.35") of snow. In Rayleigh, during the entire year, snow falls for 9.6 days and aggregates up to 42mm (1.65") of snow.Daylight
The average length of the day in January in Rayleigh is 8h and 26min.On the first day of January in Rayleigh, sunrise is at 8:03 am and sunset at 3:58 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:43 pm GMT.
Sunshine
The average sunshine in January is 4.3h.UV index
The months with the lowest UV index in Rayleigh are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 2 during January, leads to the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
What part of the year is the coldest in Rayleigh?
How cold is January in Rayleigh?
What is the average humidity in January in Rayleigh?
How much does it rain in Rayleigh in January?
How many days does it snow in January in Rayleigh?
What is the average length of the day in January in Rayleigh?
What time are sunrise and sunset in January in Rayleigh?
How long on average sun shines in January in Rayleigh?
What is the month with the lowest UV index in Rayleigh?
What is the UV index intensity in January in Rayleigh?
Average temperature in January
Rayleigh, United Kingdom
- Average high temperature in January: 6.9°C
The warmest month (with the highest average high temperature) is August (20.9°C).
The month with the lowest average high temperature is January (6.9°C).
- Average low temperature in January: 3.3°C
The month with the highest average low temperature is August (14.7°C).
The coldest month (with the lowest average low temperature) is January (3.3°C).
Average pressure in January
Rayleigh, United Kingdom
- Average pressure in January: 1014.6mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in January
Rayleigh, United Kingdom
- Average wind speed in January: 20.9km/h
The windiest month (with the highest average wind speed) is December (22km/h).
The calmest month (with the lowest average wind speed) is July (14.9km/h).
Average humidity in January
Rayleigh, 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 (75%).
Average rainfall in January
Rayleigh, United Kingdom
- Average rainfall in January: 20mm
The wettest month (with the highest rainfall) is October (33mm).
The driest month (with the least rainfall) is April (15mm).
Average rainfall days in January
Rayleigh, United Kingdom
- Average rainfall days in January: 12.4 days
The month with the highest number of rainy days is July (15.3 days).
The months with the least rainy days are February and September (9.7 days).
Average snowfall in January
Rayleigh, United Kingdom
- Average snowfall in January: 9mm
The month with the highest snowfall is February (14mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in January
Rayleigh, United Kingdom
- Average snowfall days in January: 2.3 days
The month with the highest number of snowfall days is February (3.3 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
Rayleigh, 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 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in January
Rayleigh, United Kingdom
- Average sunshine days in January: 14.2 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is July (11.8 days).
Average UV index in January
Rayleigh, 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, November and December (UV index 2).
Average cloud cover in January
Rayleigh, United Kingdom
- Average cloud cover in January: 56
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 42).
Average visibility in January
Rayleigh, United Kingdom
- Average visibility in January: 9km
The months with the highest visibility are March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, November and December (9km).
Rayleigh, United Kingdom
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