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
Rydal, Pennsylvania, observes a minor decrease in the average high-temperature with the arrival of December, falling from November's cool 52.2°F (11.2°C) to a frosty 42.8°F (6°C). During December, Rydal sees a mean low-temperature of 31.6°F (-0.2°C).Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 78%.Rainfall
In December, the rain falls for 7.5 days. Throughout December, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 122.4 rainfall days, and 12.68" (322mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Rydal, in December, snow falls for 2.5 days, with typically accumulated 0.71" (18mm) of snow. Throughout the year, in Rydal, there are 16.3 snowfall days, and 4.72" (120mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:35 pm. On the last day of December, in Rydal, sunrise is at 7:22 am and sunset at 4:45 pm EST.
Sunshine
The average sunshine in December in Rydal is 5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Rydal. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
How cold does it get in Rydal in December?
What are the most humid months in Rydal?
What is the average humidity in December in Rydal?
How much does it rain in Rydal in December?
How much does it snow in Rydal in December?
What is the month with the shortest days in Rydal?
How many hours of daylight does Rydal have in December?
When is the sunrise / sunset in December in Rydal?
How many hours of sunshine does Rydal have in December?
What is the month with the lowest UV index in Rydal?
What is the UV index reading in December in Rydal?
Average temperature in December
Rydal, PA
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in December: 31.6°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Rydal, 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
Rydal, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Rydal, PA
- Average humidity in December: 78%
The months with the highest relative humidity are February, October and December (78%).
The months with the lowest relative humidity are April, July and August (72%).
Average rainfall in December
Rydal, PA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (1.54").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in December
Rydal, PA
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (14.1 days).
The month with the least rainy days is November (6.4 days).
Average snowfall in December
Rydal, PA
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Rydal, PA
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rydal, 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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Rydal, PA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is May (14.4 days).
Average UV index in December
Rydal, PA
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (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
Rydal, PA
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Rydal, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Rydal, Pennsylvania, USA
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