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
As November transitions to December, the average high-temperature falls from a cool 51.8°F (11°C) to a cold 41.9°F (5.5°C). The month of December records an average low-temperature of 30.9°F (-0.6°C).Humidity
The average relative humidity in December in Mount Joy is 81%.Rainfall
In December, in Mount Joy, the rain falls for 10.2 days. Throughout December, 2.44" (62mm) of precipitation is accumulated. Throughout the year, in Mount Joy, there are 149.5 rainfall days, and 24.65" (626mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mount Joy, Ohio, are January through April, November and December. In Mount Joy, during December, snow falls for 4.5 days and regularly aggregates up to 1.38" (35mm) of snow. In Mount Joy, Ohio, during the entire year, snow falls for 24.9 days and aggregates up to 7.87" (200mm) of snow.Daylight
December has the shortest days of the year in Mount Joy, with an average of 9h and 30min of daylight.On the first day of December in Mount Joy, sunrise is at 7:33 am and sunset at 5:10 pm. On the last day of the month, sunrise is at 7:51 am and sunset at 5:20 pm EST.
Sunshine
The average sunshine in December in Mount Joy is 4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mount Joy, Ohio. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
Is December cold in Mount Joy?
What is the average humidity in December in Mount Joy?
How many days does it rain in December in Mount Joy?
How many days does it snow in December in Mount Joy?
What is the month with the shortest days in Mount Joy?
What is the average length of the day in December in Mount Joy?
When is the sunrise / sunset in December in Mount Joy?
How long on average sun shines in December in Mount Joy?
What is the month with the lowest UV index in Mount Joy?
What is the UV index intensity in December in Mount Joy?
Average temperature in December
Mount Joy, OH
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Mount Joy, OH
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Mount Joy, OH
- Average wind speed in December: 7.5mph
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
Mount Joy, OH
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April, August, September, October and November (76%).
Average rainfall in December
Mount Joy, OH
- Average rainfall in December: 2.44"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in December
Mount Joy, OH
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (8 days).
Average snowfall in December
Mount Joy, OH
- Average snowfall in December: 1.38"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mount Joy, OH
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mount Joy, OH
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Mount Joy, OH
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in December
Mount Joy, OH
- 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
Mount Joy, OH
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Mount Joy, OH
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are January, May, July, August and September (5mi).
Mount Joy, Ohio, USA
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