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
Holtwood's transition into December involves a gentle shift in temperature, receding from a fresh 51.1°F (10.6°C) in November to a cold 42.4°F (5.8°C). Holtwood reports a consistent average low-temperature of 31.1°F (-0.5°C) throughout December nights.Humidity
In December, the average relative humidity in Holtwood is 79%.Rainfall
In Holtwood, during December, the rain falls for 10.5 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Holtwood, Pennsylvania, during the entire year, the rain falls for 156.5 days and collects up to 28.74" (730mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Holtwood, in December, snow falls for 3 days, with typically accumulated 1.26" (32mm) of snow. In Holtwood, during the entire year, snow falls for 20.3 days and aggregates up to 11.54" (293mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:41 pm. On the last day of December, in Holtwood, Pennsylvania, sunrise is at 7:26 am and sunset at 4:50 pm EST.
Sunshine
In December, the average sunshine in Holtwood is 5h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Holtwood. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
How cold is it in Holtwood in December?
What is the average humidity in December in Holtwood?
How much does it rain in Holtwood in December?
How many days does it snow in December in Holtwood?
What is the month with the shortest days in Holtwood?
How many hours of daylight does Holtwood have in December?
When are sunrise and sunset in December in Holtwood?
How many hours of sunshine does Holtwood have in December?
What are the months with the lowest UV index in Holtwood?
How high is the UV index in December in Holtwood?
Average temperature in December
Holtwood, PA
- Average high temperature in December: 42.4°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 (36°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in December
Holtwood, PA
- Average pressure in December: 30.1"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
Holtwood, PA
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Holtwood, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are March and April (76%).
Average rainfall in December
Holtwood, PA
- Average rainfall in December: 2.13"
The wettest month (with the highest rainfall) is August (3.7").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in December
Holtwood, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in December
Holtwood, PA
- Average snowfall in December: 1.26"
The month with the highest snowfall is March (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Holtwood, PA
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is January (6.7 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
Holtwood, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Holtwood, PA
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in December
Holtwood, 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, November and December (UV index 2).
Average cloud cover in December
Holtwood, 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 32).
Average visibility in December
Holtwood, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
Holtwood, Pennsylvania, USA
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