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
December's onset brings a reduction in the average high-temperature, from a chilly 45.5°F (7.5°C) in November to a wintry 36.1°F (2.3°C). Rouseville experiences a mean temperature of 25.9°F (-3.4°C) during December nights.Humidity
In Rouseville, the average relative humidity in December is 87%.Rainfall
In December, the rain falls for 10.9 days. Throughout December, 2.83" (72mm) of precipitation is accumulated. Throughout the year, there are 177.7 rainfall days, and 35.67" (906mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 17.6 days. Throughout December, 8.62" (219mm) of snow is accumulated. Throughout the year, there are 86.5 snowfall days, and 43.07" (1094mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:26 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:44 am and sunset at 4:59 pm EST.
Sunshine
The average sunshine in December in Rouseville is 2.6h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in Rouseville in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Rouseville?
When is the sunrise / sunset in December?
How many hours of sunshine does Rouseville have in December?
When is the lowest UV index in Rouseville?
What is the UV index reading in December in Rouseville?
Average temperature in December
Rouseville, PA
- Average high temperature in December: 36.1°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in December
Rouseville, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Rouseville, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Rouseville, PA
- Average humidity in December: 87%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in December
Rouseville, PA
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is November (2.36").
Average rainfall days in December
Rouseville, PA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Rouseville, PA
- Average snowfall in December: 8.62"
The month with the highest snowfall is January (10.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rouseville, PA
- Average snowfall days in December: 17.6 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rouseville, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 2h and 4min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Rouseville, PA
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is September (12.1 days).
The month with the least sunshine days is February (5.6 days).
Average UV index in December
Rouseville, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Rouseville, PA
- Average cloud cover in December: 73
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Rouseville, PA
- Average visibility in December: 4mi
The months with the highest visibility are March, April, May, June, July, August, October and November (5mi).
The months with the lowest visibility are January, February, September and December (4mi).
Rouseville, Pennsylvania, USA
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