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 is the coldest month, with an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 20.5°F (-6.4°C).Humidity
In January, the average relative humidity in Saint Clair, Pennsylvania, is 80%.Rainfall
In Saint Clair, during 10.8 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Saint Clair, during the entire year, the rain falls for 172.9 days and collects up to 34.21" (869mm) 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 11.8 days and typically aggregates up to 5.47" (139mm) of snow.Daylight
The average length of the day in January is 9h and 39min.On the first day of January, sunrise is at 7:28 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:20 pm EST.
Sunshine
January, February and December, with an average of 4.4h of sunshine, are months with the least sunshine in Saint Clair.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.Note: In January, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
FAQ
What is the coldest month in Saint Clair?
What is the temperature in January in Saint Clair?
What is the average humidity in January in Saint Clair?
How many days does it rain in January in Saint Clair?
What is the snowiest month in Saint Clair?
How much does it snow in Saint Clair in January?
How many hours of daylight does Saint Clair have in January?
When are sunrise and sunset in January in Saint Clair?
What is the month with the least sunshine in Saint Clair?
How long on average sun shines in January in Saint Clair?
When is the lowest UV index in Saint Clair?
How high is the UV index in January in Saint Clair?
Average temperature in January
Saint Clair, PA
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in January: 20.5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in January
Saint Clair, 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
Saint Clair, PA
- Average wind speed in January: 8.1mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Saint Clair, PA
- Average humidity in January: 80%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in January
Saint Clair, PA
- Average rainfall in January: 2.68"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in January
Saint Clair, PA
- Average rainfall days in January: 10.8 days
The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and November (10.8 days).
Average snowfall in January
Saint Clair, PA
- Average snowfall in January: 5.47"
The month with the highest snowfall is January (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Saint Clair, 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
Saint Clair, 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 18min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 24min).
Average sunshine days in January
Saint Clair, PA
- Average sunshine days in January: 13.3 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is May (9.6 days).
Average UV index in January
Saint Clair, 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
Saint Clair, PA
- Average cloud cover in January: 52
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in January
Saint Clair, PA
- Average visibility in January: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
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