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
Harrow notes the coldest temperatures in January, with a high average of 34.9°F (1.6°C) and a low of 22.5°F (-5.3°C).Humidity
The average relative humidity in January is 77%.Rainfall
In Harrow, in January, it is raining for 4.3 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 91.3 rainfall days, and 7.28" (185mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Harrow, in January, snow falls for 3.6 days, with typically accumulated 0.35" (9mm) of snow. Throughout the year, in Harrow, there are 14.8 snowfall days, and 2.24" (57mm) of snow is accumulated.Daylight
In January, the average length of the day is 9h and 40min.On the first day of the month, sunrise is at 7:23 am and sunset at 4:44 pm. On the last day of January, in Harrow, sunrise is at 7:11 am and sunset at 5:16 pm EST.
Sunshine
The average sunshine in January in Harrow is 4.8h.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 2 in January translates into the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Harrow?
How cold is it in Harrow in January?
What is the average humidity in January in Harrow?
How many days does it rain in January in Harrow?
How much does it snow in Harrow in January?
What is the average length of the day in January in Harrow?
What time are sunrise and sunset in January in Harrow?
How long on average sun shines in January in Harrow?
What are the months with the lowest UV index in Harrow?
What is the UV index reading in January in Harrow?
Average temperature in January
Harrow, PA
- Average high temperature in January: 34.9°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in January: 22.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in January
Harrow, PA
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Harrow, PA
- Average wind speed in January: 8.1mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in January
Harrow, PA
- Average humidity in January: 77%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and July (76%).
Average rainfall in January
Harrow, PA
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is July (0.91").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in January
Harrow, PA
- Average rainfall days in January: 4.3 days
The months with the highest number of rainy days are June and July (10.2 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in January
Harrow, PA
- Average snowfall in January: 0.35"
The month with the highest snowfall is March (0.63").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Harrow, PA
- Average snowfall days in January: 3.6 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Harrow, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in January
Harrow, PA
- Average sunshine days in January: 23.8 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in January
Harrow, PA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Harrow, PA
- Average cloud cover in January: 47
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in January
Harrow, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, November and December (6mi).
The months with the lowest visibility are May, June, July, August, September and October (5mi).
Harrow, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location