January weather forecastPenn, PA
January
Weather in January
January, the same as December, is another cold winter month in Penn, Pennsylvania, with an average temperature fluctuating between 20.5°F (-6.4°C) and 32.9°F (0.5°C).Temperature
January, noted for its average high-temperature of 32.9°F (0.5°C) and an average low-temperature of 20.5°F (-6.4°C), is considered the coldest month.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 85%.Rainfall
In Penn, during January, the rain falls for 9.5 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Penn, during the entire year, the rain falls for 183.8 days and collects up to 35.16" (893mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 18.2 days and typically aggregates up to 7.05" (179mm) of snow.Daylight
The average length of the day in January is 9h and 41min.On the first day of January, sunrise is at 7:41 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:35 pm EST.
Sunshine
The month with the least sunshine is January, with an average of 2.9h of sunshine.UV index
In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 2 in January translates into this advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Penn, PA
- Average high temperature in January: 32.9°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in January: 20.5°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in January
Penn, PA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in January
Penn, PA
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Penn, PA
- Average humidity in January: 85%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in January
Penn, PA
- Average rainfall in January: 2.6"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in January
Penn, PA
- Average rainfall days in January: 9.5 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in January
Penn, PA
- Average snowfall in January: 7.05"
The month with the highest snowfall is January (7.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Penn, PA
- Average snowfall days in January: 18.2 days
The month with the highest number of snowfall days is January (18.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Penn, PA
- Average daylight in January: 9h and 42min
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 24min).
- Average sunshine in January: 2h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in January
Penn, PA
- Average sunshine days in January: 7 days
The month with the most sunshine days is November (14 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in January
Penn, PA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Penn, PA
- Average cloud cover in January: 70
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in January
Penn, PA
- Average visibility in January: 4mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
