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
The coldest period tends to be January, when average temperatures fluctuate between a high of 6.7°C (44.1°F) and a low of 1.9°C (35.4°F).Humidity
In January, the average relative humidity is 88%.Rainfall
The month with the least rainfall in Harrow on the Hill is January, when the rain falls for 11 days and typically collects 19mm (0.75") of precipitation.Snowfall
January through March, November and December are months with snowfall. In Harrow on the Hill, in January, during 1.8 snowfall days, 10mm (0.39") of snow is typically accumulated. Throughout the year, in Harrow on the Hill, there are 5.5 snowfall days, and 40mm (1.57") of snow is accumulated.Daylight
In Harrow on the Hill, the average length of the day in January is 8h and 26min.On the first day of January in Harrow on the Hill, United Kingdom, sunrise is at 8:07 am and sunset at 4:02 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:47 pm GMT.
Sunshine
In Harrow on the Hill, United Kingdom, the average sunshine in January is 4.3h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Harrow on the Hill?
Is it cold in Harrow on the Hill during January?
What is the average humidity in January in Harrow on the Hill?
What is the driest month in Harrow on the Hill?
How many days does it rain in January in Harrow on the Hill?
How much does it snow in Harrow on the Hill in January?
What is the average length of the day in January in Harrow on the Hill?
When is the sunrise / sunset in January in Harrow on the Hill?
How long on average sun shines in January in Harrow on the Hill?
What is the month with the lowest UV index in Harrow on the Hill?
What is the UV index intensity in January in Harrow on the Hill?
Average temperature in January
Harrow on the Hill, United Kingdom
- Average high temperature in January: 6.7°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in January: 1.9°C
The month with the highest average low temperature is August (13.7°C).
The coldest month (with the lowest average low temperature) is January (1.9°C).
Average pressure in January
Harrow on the Hill, United Kingdom
- Average pressure in January: 1014.5mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in January
Harrow on the Hill, United Kingdom
- Average wind speed in January: 16.8km/h
The windiest month (with the highest average wind speed) is February (17.6km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in January
Harrow on the Hill, United Kingdom
- Average humidity in January: 88%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in January
Harrow on the Hill, United Kingdom
- Average rainfall in January: 19mm
The wettest month (with the highest rainfall) is June (46mm).
The driest month (with the least rainfall) is January (19mm).
Average rainfall days in January
Harrow on the Hill, United Kingdom
- Average rainfall days in January: 11 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in January
Harrow on the Hill, United Kingdom
- Average snowfall in January: 10mm
The month with the highest snowfall is February (16mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in January
Harrow on the Hill, United Kingdom
- Average snowfall days in January: 1.8 days
The month with the highest number of snowfall days is February (2.1 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
Harrow on the Hill, 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
Harrow on the Hill, United Kingdom
- Average sunshine days in January: 16 days
The month with the most sunshine days is December (16.3 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in January
Harrow on the Hill, 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
Harrow on the Hill, United Kingdom
- Average cloud cover in January: 57
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 49).
Average visibility in January
Harrow on the Hill, 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).
