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
Harrow's January weather, marked by an average high temperature of 44.1°F and an average low temperature of 35.4°F, is the coldest in the year.Humidity
The average relative humidity in January is 88%.Rainfall
The month with the least rainfall is January, when the rain falls for 11 days and typically collects 0.75" of precipitation.Snowfall
January through March, November and December are months with snowfall. In Harrow, in January, during 1.8 snowfall days, 0.39" of snow is typically accumulated. In Harrow, during the entire year, snow falls for 5.5 days and aggregates up to 1.57" of snow.Daylight
In January, the average length of the day is 8h and 26min.On the first day of the month, sunrise is at 8:07 am and sunset at 4:02 pm. On the last day of January, sunrise is at 7:41 am and sunset at 4:47 pm GMT.
Sunshine
In January, the average sunshine is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 2 during January, leads to the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Harrow?
How cold is January in Harrow?
What is the average humidity in January in Harrow?
What is the driest month in Harrow?
How many days does it rain in January in Harrow?
How much does it snow in Harrow in January?
How many hours of daylight does Harrow have in January?
When is the sunrise / sunset in January in Harrow?
How long on average sun shines in January in Harrow?
When is the lowest UV index in Harrow?
What is the UV index intensity in January in Harrow?
Average temperature in January
Harrow, United Kingdom
- Average high temperature in January: 44.1°F
The warmest month (with the highest average high temperature) is July (71.2°F).
The month with the lowest average high temperature is January (44.1°F).
- Average low temperature in January: 35.4°F
The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).
Average pressure in January
Harrow, United Kingdom
- Average pressure in January: 29.96"Hg
The months with the highest atmospheric pressure are May and September (30.03"Hg).
The month with the lowest atmospheric pressure is November (29.84"Hg).
Average wind speed in January
Harrow, United Kingdom
- Average wind speed in January: 10.4mph
The windiest month (with the highest average wind speed) is February (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in January
Harrow, 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, United Kingdom
- Average rainfall in January: 0.75"
The wettest month (with the highest rainfall) is June (1.81").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in January
Harrow, 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, United Kingdom
- Average snowfall in January: 0.39"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Harrow, 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, 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, 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, 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, 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, United Kingdom
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (6mi).
The month with the lowest visibility is November (5mi).
