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 negligible change in high-temperatures, falling from a fresh 50.4°F (10.2°C) in November to an icy 41.5°F (5.3°C). An average low-temperature of 29.3°F (-1.5°C) marks the month of December in Orrtanna.Humidity
In Orrtanna, the average relative humidity in December is 79%.Rainfall
In December, in Orrtanna, the rain falls for 7.7 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 125.3 rainfall days, and 10.59" (269mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Orrtanna, Pennsylvania, in December, snow falls for 2.9 days, with typically accumulated 0.43" (11mm) of snow. Throughout the year, there are 20.2 snowfall days, and 3.54" (90mm) of snow is accumulated.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 7:12 am and sunset at 4:45 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:54 pm EST.
Sunshine
In Orrtanna, the average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Orrtanna are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 2 during December leads to these instructions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
How cold is December in Orrtanna?
What is the average humidity in December in Orrtanna?
How much does it rain in Orrtanna in December?
How many days does it snow in December in Orrtanna?
What is the month with the shortest days in Orrtanna?
What is the average length of the day in December in Orrtanna?
When are sunrise and sunset in December in Orrtanna?
How long on average sun shines in December in Orrtanna?
What is the month with the lowest UV index in Orrtanna?
What is the UV index intensity in December in Orrtanna?
Average temperature in December
Orrtanna, PA
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Orrtanna, 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
Orrtanna, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in December
Orrtanna, PA
- Average humidity in December: 79%
The months with the highest relative humidity are February, May and October (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Orrtanna, PA
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in December
Orrtanna, PA
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in December
Orrtanna, PA
- Average snowfall in December: 0.43"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Orrtanna, PA
- Average snowfall days in December: 2.9 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, September and October (0 days).
Average daylight in December /
Average sunshine in December
Orrtanna, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Orrtanna, PA
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is May (12.9 days).
Average UV index in December
Orrtanna, PA
- Average UV index in December: 2
The months with the highest UV index are 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
Orrtanna, PA
- Average cloud cover in December: 49
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Orrtanna, PA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, July, November and December (6mi).
The months with the lowest visibility are January, February, May, August, September and October (5mi).
Orrtanna, Pennsylvania, USA
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