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, with its high-temperature average of 31.3°F (-0.4°C) and a low-temperature average of 18.1°F (-7.7°C), is the coldest month.Humidity
In January, the average relative humidity is 87%.Rainfall
In Slippery Rock, in January, during 8.1 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. In Slippery Rock, during the entire year, the rain falls for 177.8 days and collects up to 36.65" (931mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. January is the month with the most snowfall in Slippery Rock. Snow falls for 19.1 days and accumulates 8.54" (217mm) of snow.Daylight
The average length of the day in January is 9h and 37min.On the first day of the month, sunrise is at 7:45 am and sunset at 5:02 pm. On the last day of January, sunrise is at 7:31 am and sunset at 5:35 pm EST.
Sunshine
The month with the least sunshine is January, with an average of 2.3h of sunshine.UV index
In January, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
How cold is January?
What is the average humidity in January in Slippery Rock?
How many days does it rain in January?
What is the snowiest month in Slippery Rock?
How many days does it snow in January?
How many hours of daylight does Slippery Rock have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the UV index reading in January?
Average temperature in January
Slippery Rock, PA
- Average high temperature in January: 31.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in January: 18.1°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in January
Slippery Rock, PA
- Average pressure in January: 30.1"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
Slippery Rock, PA
- Average wind speed in January: 8.3mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in January
Slippery Rock, PA
- Average humidity in January: 87%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, May, June, July and August (79%).
Average rainfall in January
Slippery Rock, PA
- Average rainfall in January: 2.83"
The wettest month (with the highest rainfall) is April (3.74").
The driest month (with the least rainfall) is November (2.36").
Average rainfall days in January
Slippery Rock, PA
- Average rainfall days in January: 8.1 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in January
Slippery Rock, PA
- Average snowfall in January: 8.54"
The month with the highest snowfall is January (8.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Slippery Rock, PA
- Average snowfall days in January: 19.1 days
The month with the highest number of snowfall days is January (19.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Slippery Rock, 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: 2h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in January
Slippery Rock, PA
- Average sunshine days in January: 7.3 days
The month with the most sunshine days is November (13.1 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in January
Slippery Rock, PA
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Slippery Rock, PA
- Average cloud cover in January: 76
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in January
Slippery Rock, PA
- Average visibility in January: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).
Slippery Rock, Pennsylvania, USA
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