December weather forecast
Manheim, PA

Share

Weather in December

The first month of the winter, December, is still a cold month in Manheim, Pennsylvania, with an average temperature fluctuating between 41.5°F (5.3°C) and 30°F (-1.1°C).

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.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

In December, the average high-temperature and low-temperature are 41.5°F (5.3°C) and 30°F (-1.1°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity is 79%.

How many days does it rain in December?

In December, in Manheim, the rain falls for 11.3 days. Throughout December, 2.36" (60mm) of precipitation is accumulated.

How many days does it snow in December?

In Manheim, in December, during 3.8 snowfall days, 1.57" (40mm) of snow is typically accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 22min.

When is the sunrise / sunset in December in Manheim?

In December, on the first day of the month, sunrise is at 7:09 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:50 pm EST.

How many hours of sunshine does Manheim have in December?

In December, the average sunshine duration is 4.8h.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December?

In Manheim, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Manheim, PA

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / 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 - 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 - 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 - 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 - 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

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location