Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Calvin's December weather comes with a decrease in average high-temperatures, moving from a chilly 48.2°F (9°C) in November to an icy 38.7°F (3.7°C). Calvin records an average low of 27.3°F (-2.6°C) throughout the nights in December.Humidity
The average relative humidity in December is 81%.Rainfall
In December, in Calvin, the rain falls for 10.3 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, in Calvin, Pennsylvania, there are 148.3 rainfall days, and 17.6" (447mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Calvin, during December, snow falls for 6.7 days and regularly aggregates up to 1.34" (34mm) of snow. Throughout the year, in Calvin, there are 38.9 snowfall days, and 8.82" (224mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:16 am and sunset at 4:46 pm. On the last day of December, in Calvin, Pennsylvania, sunrise is at 7:34 am and sunset at 4:56 pm EST.
Sunshine
In Calvin, Pennsylvania, the average sunshine in December is 4.4h.UV index
The months with the lowest UV index in Calvin, Pennsylvania, are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is December in Calvin?
What is the average humidity in December in Calvin?
How many days does it rain in December in Calvin?
How much does it snow in Calvin in December?
What is the month with the shortest days in Calvin?
What is the average length of the day in December in Calvin?
When are sunrise and sunset in December in Calvin?
How many hours of sunshine does Calvin have in December?
When is the lowest UV index in Calvin?
What is the UV index reading in December in Calvin?
Average temperature in December
Calvin, PA
- Average high temperature in December: 38.7°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in December
Calvin, PA
- Average pressure in December: 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 December
Calvin, PA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Calvin, PA
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Calvin, PA
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (2.17").
The driest months (with the least rainfall) are January and November (1.06").
Average rainfall days in December
Calvin, PA
- Average rainfall days in December: 10.3 days
The month with the highest number of rainy days is May (16.9 days).
The months with the least rainy days are January and February (8.3 days).
Average snowfall in December
Calvin, PA
- Average snowfall in December: 1.34"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Calvin, PA
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Calvin, PA
- Average daylight in December: 9h and 2min
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 December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Calvin, PA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Calvin, PA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Calvin, PA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Calvin, PA
- Average visibility in December: 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).
Calvin, Pennsylvania, USA
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