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
Castle Shannon notes the coldest temperatures in January, with a high average of 33.4°F (0.8°C) and a low of 20.8°F (-6.2°C).Humidity
January and February, with an average relative humidity of 84%, are the most humid months in Castle Shannon.Rainfall
In January, in Castle Shannon, the rain falls for 8.5 days. Throughout January, 1.65" (42mm) of precipitation is accumulated. In Castle Shannon, during the entire year, the rain falls for 164 days and collects up to 26.89" (683mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. The month with the most snowfall in Castle Shannon is January, when snow falls for 16.3 days and typically aggregates up to 3.46" (88mm) of snow.Daylight
The average length of the day in January is 9h and 41min.On the first day of the month, sunrise is at 7:42 am and sunset at 5:04 pm. On the last day of January, in Castle Shannon, sunrise is at 7:30 am and sunset at 5:36 pm EST.
Sunshine
With an average of 2.9h of sunshine, January has the least sunshine of the year in Castle Shannon, Pennsylvania.UV index
In Castle Shannon, 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 radiation for the average person.Note: A typical high UV index of 2 in January suggests the following recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the coldest month in Castle Shannon?
How cold is it in Castle Shannon in January?
What is the most humid month in Castle Shannon?
What is the average humidity in January in Castle Shannon?
How many days does it rain in January in Castle Shannon?
When does it snow the most in Castle Shannon?
How many days does it snow in January in Castle Shannon?
What is the average length of the day in January in Castle Shannon?
When are sunrise and sunset in January in Castle Shannon?
What is the month with the least sunshine in Castle Shannon?
How many hours of sunshine does Castle Shannon have in January?
What is the UV index intensity in January in Castle Shannon?
Average temperature in January
Castle Shannon, PA
- Average high temperature in January: 33.4°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in January: 20.8°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in January
Castle Shannon, 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
Castle Shannon, PA
- Average wind speed in January: 7.9mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Castle Shannon, PA
- Average humidity in January: 84%
The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (73%).
Average rainfall in January
Castle Shannon, PA
- Average rainfall in January: 1.65"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.61").
Average rainfall days in January
Castle Shannon, PA
- Average rainfall days in January: 8.5 days
The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in January
Castle Shannon, PA
- Average snowfall in January: 3.46"
The month with the highest snowfall is January (3.46").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Castle Shannon, PA
- Average snowfall days in January: 16.3 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Castle Shannon, 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: 2h and 5min
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
Castle Shannon, PA
- Average sunshine days in January: 9.7 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (9.5 days).
Average UV index in January
Castle Shannon, 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
Castle Shannon, 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 34).
Average visibility in January
Castle Shannon, PA
- Average visibility in January: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Castle Shannon, Pennsylvania, USA
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