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 brings the lowest temperatures, with an average high of 32.5°F (0.3°C) and an average low of 20.1°F (-6.6°C).Humidity
January and February, with an average relative humidity of 85%, are the most humid months.Rainfall
January and November are months with the least rain when the rain falls for 4.5 days and typically aggregates up to 0.47" (12mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In January, it is snowing for 8.3 days. Throughout January, 0.87" (22mm) of snow is accumulated. Throughout the year, in Sewickley Heights, Pennsylvania, there are 33.9 snowfall days, and 4.37" (111mm) of snow is accumulated.Daylight
In January, the average length of the day in Sewickley Heights is 9h and 40min.On the first day of the month, sunrise is at 7:44 am and sunset at 5:04 pm. On the last day of January, sunrise is at 7:31 am and sunset at 5:36 pm EST.
Sunshine
January has the least sunshine of the year, with an average of 2.9h of sunshine.UV index
In Sewickley Heights, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 2 during January leads to these advisories:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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 are the most humid months?
What is the average humidity in January?
What is the driest month?
How much does it rain in Sewickley Heights in January?
How many days does it snow in January?
How many hours of daylight does Sewickley Heights have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the UV index intensity in January?
Average temperature in January
Sewickley Heights, PA
- Average high temperature in January: 32.5°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in January: 20.1°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in January
Sewickley Heights, 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 (29.94"Hg).
Average wind speed in January
Sewickley Heights, PA
- Average wind speed in January: 8mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in January
Sewickley Heights, 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 July and August (75%).
Average rainfall in January
Sewickley Heights, PA
- Average rainfall in January: 0.47"
The wettest months (with the highest rainfall) are June and July (0.91").
The driest months (with the least rainfall) are January and November (0.47").
Average rainfall days in January
Sewickley Heights, PA
- Average rainfall days in January: 4.5 days
The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in January
Sewickley Heights, PA
- Average snowfall in January: 0.87"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Sewickley Heights, PA
- Average snowfall days in January: 8.3 days
The month with the highest number of snowfall days is February (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Sewickley Heights, 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: 2h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in January
Sewickley Heights, PA
- Average sunshine days in January: 21.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is May (14.7 days).
Average UV index in January
Sewickley Heights, PA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Sewickley Heights, 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
Sewickley Heights, PA
- Average visibility in January: 5mi
The months with the highest visibility are April, June, August and November (6mi).
The months with the lowest visibility are January, February, March, May, July, September, October and December (5mi).
Sewickley Heights, Pennsylvania, USA
Weather forecast for your location
2. Allow the app to use your location