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
Temperature records mark January as the coldest month, with highs averaging 33.3°F (0.7°C) and lows at 20.3°F (-6.5°C).Humidity
The months with the highest humidity in Southwest are January and February, with an average relative humidity of 85%.Rainfall
In Southwest, in January, during 9.8 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Southwest, during the entire year, the rain falls for 185.4 days and collects up to 34.02" (864mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. January is the month with the most snowfall. Snow falls for 17.3 days and accumulates 7.09" (180mm) of snow.Daylight
In Southwest, the average length of the day in January is 9h and 42min.On the first day of the month, sunrise is at 7:40 am and sunset at 5:02 pm. On the last day of January, sunrise is at 7:27 am and sunset at 5:34 pm EST.
Sunshine
January has the least sunshine of the year, with an average of 3h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Southwest, Pennsylvania. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In January, a daily UV index of 2 turns into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the coldest time of year in Southwest?
How cold is January in Southwest?
What are the most humid months in Southwest?
What is the average humidity in January in Southwest?
How many days does it rain in January in Southwest?
When does it snow the most in Southwest?
How many days does it snow in January in Southwest?
What is the average length of the day in January in Southwest?
When is the sunrise / sunset in January in Southwest?
What is the month with the least sunshine in Southwest?
How long on average sun shines in January in Southwest?
When is the lowest UV index in Southwest?
What is the UV index intensity in January in Southwest?
Average temperature in January
Southwest, PA
- Average high temperature in January: 33.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in January: 20.3°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in January
Southwest, PA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in January
Southwest, PA
- Average wind speed in January: 8.5mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Southwest, 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
Southwest, PA
- Average rainfall in January: 2.68"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in January
Southwest, PA
- Average rainfall days in January: 9.8 days
The month with the highest number of rainy days is May (22 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in January
Southwest, PA
- Average snowfall in January: 7.09"
The month with the highest snowfall is January (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Southwest, PA
- Average snowfall days in January: 17.3 days
The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Southwest, 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 24min).
- Average sunshine in January: 3h
The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 3h).
Average sunshine days in January
Southwest, PA
- Average sunshine days in January: 6.5 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is January (6.5 days).
Average UV index in January
Southwest, 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, November and December (UV index 2).
Average cloud cover in January
Southwest, PA
- Average cloud cover in January: 69
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in January
Southwest, 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).
Southwest, Pennsylvania, USA
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