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
In December, the average high-temperature decreases from a chilly 49.3°F (9.6°C) in November to an icy 39.6°F (4.2°C). Throughout December, the average low-temperature in Mendelssohn dips to a subzero cold 28.4°F (-2°C).Humidity
In December, the average relative humidity is 83%.Rainfall
In Mendelssohn, in December, during 8.5 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. In Mendelssohn, during the entire year, the rain falls for 128 days and collects up to 10.2" (259mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Mendelssohn, in December, during 10.1 snowfall days, 1.26" (32mm) of snow is typically accumulated. Throughout the year, there are 50 snowfall days, and 6.69" (170mm) of snow is accumulated.Daylight
The month with the shortest days in Mendelssohn, Pennsylvania, is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:23 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 5:03 pm EST.
Sunshine
In Mendelssohn, the average sunshine in December is 3.4h.UV index
The month with the lowest UV index in Mendelssohn, Pennsylvania, is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Mendelssohn in December?
What is the average humidity in December in Mendelssohn?
How much does it rain in Mendelssohn in December?
How much does it snow in Mendelssohn in December?
What is the month with the shortest days in Mendelssohn?
How many hours of daylight does Mendelssohn have in December?
What time are sunrise and sunset in December in Mendelssohn?
How long on average sun shines in December in Mendelssohn?
What is the month with the lowest UV index in Mendelssohn?
What is the UV index reading in December in Mendelssohn?
Average temperature in December
Mendelssohn, PA
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in December
Mendelssohn, PA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Mendelssohn, PA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Mendelssohn, PA
- Average humidity in December: 83%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
Mendelssohn, PA
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are September and November (0.55").
Average rainfall days in December
Mendelssohn, PA
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in December
Mendelssohn, PA
- Average snowfall in December: 1.26"
The months with the highest snowfall are January and February (1.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Mendelssohn, PA
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mendelssohn, 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: 3h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Mendelssohn, PA
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in December
Mendelssohn, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Mendelssohn, PA
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Mendelssohn, PA
- Average visibility in December: 5mi
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Mendelssohn, Pennsylvania, USA
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