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
With average high and low temperatures of 30.6°F (-0.8°C) and 18.9°F (-7.3°C) respectively, January is Williamsport's coldest month.Humidity
In Williamsport, the average relative humidity in January is 81%.Rainfall
In January, the rain falls for 8.4 days. Throughout January, 0.98" (25mm) of precipitation is accumulated. Throughout the year, in Williamsport, Pennsylvania, there are 145.2 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Williamsport, during January, snow falls for 11.8 days and regularly aggregates up to 2.13" (54mm) of snow. In Williamsport, during the entire year, snow falls for 39.1 days and aggregates up to 7.56" (192mm) of snow.Daylight
In Williamsport, the average length of the day in January is 9h and 36min.On the first day of the month, sunrise is at 7:33 am and sunset at 4:49 pm. On the last day of January, in Williamsport, sunrise is at 7:20 am and sunset at 5:22 pm EST.
Sunshine
The months with the least sunshine are January and February, with an average of 3.7h of sunshine.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Williamsport. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In January, the maximum UV index of 2 transforms into these recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What part of the year is the coldest in Williamsport?
How cold is January in Williamsport?
What is the average humidity in January in Williamsport?
How many days does it rain in January in Williamsport?
How much does it snow in Williamsport in January?
How many hours of daylight does Williamsport have in January?
When are sunrise and sunset in January in Williamsport?
What are the months with the least sunshine in Williamsport?
How many hours of sunshine does Williamsport have in January?
When is the lowest UV index in Williamsport?
How high is the UV index in January in Williamsport?
Average temperature in January
Williamsport, PA
- Average high temperature in January: 30.6°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in January: 18.9°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in January
Williamsport, PA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in January
Williamsport, PA
- Average wind speed in January: 7.5mph
The windiest months (with the highest average wind speed) are January, March and April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Williamsport, PA
- Average humidity in January: 81%
The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in January
Williamsport, PA
- Average rainfall in January: 0.98"
The wettest month (with the highest rainfall) is April (1.93").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in January
Williamsport, PA
- Average rainfall days in January: 8.4 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in January
Williamsport, PA
- Average snowfall in January: 2.13"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Williamsport, PA
- Average snowfall days in January: 11.8 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Williamsport, PA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).
Average sunshine days in January
Williamsport, PA
- Average sunshine days in January: 14.4 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in January
Williamsport, PA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in January
Williamsport, PA
- Average cloud cover in January: 60
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in January
Williamsport, PA
- Average visibility in January: 5mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is September (4mi).
Williamsport, Pennsylvania, USA
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