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
The month of January, characterized by an average high of 33.8°F (1°C) and a low of 21.6°F (-5.8°C), is recognized as the coldest.Humidity
In January, the average relative humidity is 78%.Rainfall
In January, in Cornwall, the rain falls for 6.7 days. Throughout January, 1.06" (27mm) of precipitation is accumulated. Throughout the year, in Cornwall, there are 137.4 rainfall days, and 16.26" (413mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Cornwall. The month with the most snowfall is January, when snow falls for 5.2 days and typically aggregates up to 1.97" (50mm) of snow.Daylight
In January, the average length of the day is 9h and 41min.On the first day of the month, sunrise is at 7:28 am and sunset at 4:49 pm. On the last day of January, sunrise is at 7:15 am and sunset at 5:22 pm EST.
Sunshine
In Cornwall, the average sunshine in January is 4.6h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cornwall, Pennsylvania. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In January, a regular UV index of 2 translates into these guidelines:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Frequently asked questions
What month is the coldest in Cornwall?
How cold is January in Cornwall?
What is the average humidity in January in Cornwall?
How much does it rain in Cornwall in January?
When does it snow the most in Cornwall?
How much does it snow in Cornwall in January?
How many hours of daylight does Cornwall have in January?
When is the sunrise / sunset in January in Cornwall?
How many hours of sunshine does Cornwall have in January?
What is the month with the lowest UV index in Cornwall?
What is the UV index intensity in January in Cornwall?
Average temperature in January
Cornwall, PA
- Average high temperature in January: 33.8°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in January: 21.6°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in January
Cornwall, 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
Cornwall, PA
- Average wind speed in January: 8.5mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Cornwall, PA
- Average humidity in January: 78%
The months with the highest relative humidity are February, May and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in January
Cornwall, PA
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in January
Cornwall, PA
- Average rainfall days in January: 6.7 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in January
Cornwall, PA
- Average snowfall in January: 1.97"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Cornwall, PA
- Average snowfall days in January: 5.2 days
The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Cornwall, 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: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in January
Cornwall, PA
- Average sunshine days in January: 20.3 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in January
Cornwall, PA
- Average UV index in January: 2
The months with the highest UV index are May, June and 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
Cornwall, PA
- Average cloud cover in January: 49
The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in January
Cornwall, PA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
Cornwall, Pennsylvania, USA
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