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 December commences, the average high-temperature subtly reduces, transitioning from a cool 50.4°F (10.2°C) in November to a wintry 41.5°F (5.3°C). Manheim sees an average low-temperature of 30°F (-1.1°C) during December.Humidity
The average relative humidity in December is 79%.Rainfall
In December, the rain falls for 11.3 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 161.8 rainfall days, and 30.31" (770mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Manheim, in December, during 3.8 snowfall days, 1.57" (40mm) of snow is typically accumulated. Throughout the year, there are 24.1 snowfall days, and 11.93" (303mm) 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 7:09 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:50 pm EST.
Sunshine
In December, the average sunshine is 4.8h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December in Manheim?
How many hours of sunshine does Manheim have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Manheim, PA
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 30°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in December
Manheim, 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
Manheim, PA
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Manheim, PA
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Manheim, PA
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is August (3.31").
The driest month (with the least rainfall) is February (2.09").
Average rainfall days in December
Manheim, PA
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Manheim, PA
- Average snowfall in December: 1.57"
The month with the highest snowfall is March (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Manheim, PA
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Manheim, 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 36min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Manheim, PA
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is November (17.8 days).
The months with the least sunshine days are May and July (11.6 days).
Average UV index in December
Manheim, 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, March, November and December (UV index 2).
Average cloud cover in December
Manheim, PA
- Average cloud cover in December: 49
The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Manheim, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, November and December (6mi).
The months with the lowest visibility are May, August, September and October (5mi).
Manheim, Pennsylvania, USA
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