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 tends to be the coldest month, with temperatures averaging a daily high of 25°F (-3.9°C) and a low of 13.1°F (-10.5°C).Humidity
January and February, with an average relative humidity of 88%, are the most humid months.Rainfall
In January, in Philadelphia, the rain falls for 8.8 days. Throughout January, 2.4" (61mm) of precipitation is accumulated. Throughout the year, in Philadelphia, there are 166.4 rainfall days, and 30.55" (776mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Philadelphia. In Philadelphia, in January, during 20.6 snowfall days, 8.94" (227mm) of snow is typically accumulated. In Philadelphia, during the entire year, snow falls for 87.3 days and aggregates up to 40.16" (1020mm) of snow.Daylight
The average length of the day in January in Philadelphia is 9h and 20min.On the first day of January, sunrise is at 7:37 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:10 pm EST.
Sunshine
The months with the least sunshine are January and February, with an average of 2.9h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Philadelphia. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 1 in January translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Philadelphia?
How cold is it in Philadelphia in January?
What are the most humid months in Philadelphia?
What is the average humidity in January in Philadelphia?
How many days does it rain in January in Philadelphia?
How many days does it snow in January in Philadelphia?
What is the average length of the day in January in Philadelphia?
What time are sunrise and sunset in January in Philadelphia?
What are the months with the least sunshine in Philadelphia?
How long on average sun shines in January in Philadelphia?
When is the lowest UV index in Philadelphia?
What is the UV index reading in January in Philadelphia?
Average temperature in January
Philadelphia, NY
- Average high temperature in January: 25°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in January: 13.1°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in January
Philadelphia, NY
- Average pressure in January: 30.03"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Philadelphia, NY
- Average wind speed in January: 9.7mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in January
Philadelphia, NY
- Average humidity in January: 88%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (77%).
Average rainfall in January
Philadelphia, NY
- Average rainfall in January: 2.4"
The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in January
Philadelphia, NY
- Average rainfall days in January: 8.8 days
The month with the highest number of rainy days is October (17.4 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in January
Philadelphia, NY
- Average snowfall in January: 8.94"
The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Philadelphia, NY
- Average snowfall days in January: 20.6 days
The month with the highest number of snowfall days is January (20.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Philadelphia, NY
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January: 2h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 2h and 54min).
Average sunshine days in January
Philadelphia, NY
- Average sunshine days in January: 7.1 days
The month with the most sunshine days is September (14.8 days).
The month with the least sunshine days is February (6.9 days).
Average UV index in January
Philadelphia, NY
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Philadelphia, NY
- Average cloud cover in January: 71
The months with the most cloud cover are January and February (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in January
Philadelphia, NY
- Average visibility in January: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Philadelphia, New York, USA
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