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
The onset of December entails a temperature shift, as the average high-temperature decreases from a frosty 47.5°F (8.6°C) in November to a wintry 38.1°F (3.4°C). In December, the average low-temperature in Byrnsville records at a freezing cold 27.5°F (-2.5°C) during the nights.Humidity
The average relative humidity in December in Byrnsville, Pennsylvania, is 82%.Rainfall
In Byrnsville, in December, during 11.9 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. Throughout the year, there are 159.6 rainfall days, and 29.41" (747mm) of precipitation is accumulated.Snowfall
Months with snowfall in Byrnsville are January through May, October through December. In Byrnsville, Pennsylvania, during December, snow falls for 8.7 days and regularly aggregates up to 3.54" (90mm) of snow. In Byrnsville, during the entire year, snow falls for 48.2 days and aggregates up to 24.84" (631mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Byrnsville.On the first day of December, sunrise is at 7:10 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:47 pm EST.
Sunshine
In December, the average sunshine in Byrnsville is 4.4h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold does it get in Byrnsville in December?
What is the average humidity in December in Byrnsville?
How much does it rain in Byrnsville in December?
How much does it snow in Byrnsville in December?
What is the month with the shortest days in Byrnsville?
How many hours of daylight does Byrnsville have in December?
What time are sunrise and sunset in December in Byrnsville?
How long on average sun shines in December in Byrnsville?
What is the month with the lowest UV index in Byrnsville?
What is the UV index intensity in December in Byrnsville?
Average temperature in December
Byrnsville, PA
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Byrnsville, PA
- Average pressure in December: 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 December
Byrnsville, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Byrnsville, PA
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Byrnsville, PA
- Average rainfall in December: 2.28"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Byrnsville, PA
- Average rainfall days in December: 11.9 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in December
Byrnsville, PA
- Average snowfall in December: 3.54"
The month with the highest snowfall is January (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Byrnsville, PA
- Average snowfall days in December: 8.7 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Byrnsville, PA
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 4h and 2min
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 12min).
Average sunshine days in December
Byrnsville, PA
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in December
Byrnsville, PA
- Average UV index in December: 2
The months with the highest UV index are 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 December
Byrnsville, PA
- Average cloud cover in December: 55
The months with the most cloud cover are February and December (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Byrnsville, 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).
Byrnsville, Pennsylvania, USA
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