December weather forecast
Apollo, PA

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Weather in December

December, the first month of the winter in Apollo, is still a cold month, with an average temperature ranging between min 27.3°F (-2.6°C) and max 38.7°F (3.7°C).

Temperature

In December, the average high-temperature decreases from a chilly 48.4°F (9.1°C) in November to a wintry 38.7°F (3.7°C). Apollo's temperature tends to fall to an average low of 27.3°F (-2.6°C) during the nights of December.

Humidity

In Apollo, the average relative humidity in December is 84%.

Rainfall

In December, the rain falls for 10.1 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. In Apollo, during the entire year, the rain falls for 147.1 days and collects up to 18.54" (471mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 9.1 days. Throughout December, 2.2" (56mm) of snow is accumulated. In Apollo, during the entire year, snow falls for 45.9 days and aggregates up to 11.3" (287mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of December, sunrise is at 7:23 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 5:01 pm EST.

Sunshine

The average sunshine in December is 3.1h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 1 during December translates into the following directions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

During December, Apollo experiences an average high-temperature of 38.7°F (3.7°C) and a low-temperature of 27.3°F (-2.6°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 86°F (30°C).

What is the average humidity in December?

In Apollo, the average relative humidity in December is 84%.

How many days does it rain in December?

In December, the rain falls for 10.1 days. Throughout December, 1.38" (35mm) of precipitation is accumulated.

How much does it snow in December?

In Apollo, in December, during 9.1 snowfall days, 2.2" (56mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

The average day length in December is 9h and 20min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:23 am and sunset at 4:51 pm. On the last day of the month, in Apollo, sunrise is at 7:41 am and sunset at 5:01 pm EST.

How long on average sun shines in December?

The average sunshine duration in December in Apollo is 3.1h.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a low health threat from unsafe 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
Apollo, PA

Average temperature in December - Apollo, PA
  • Average high temperature in December: 38.7°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in December: 27.3°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

Average pressure in December
Apollo, PA

Average pressure in December - Apollo, 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 (29.95"Hg).

Average wind speed in December
Apollo, PA

Average wind speed in December - Apollo, PA
  • Average wind speed in December: 7.6mph

The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in December
Apollo, PA

Average humidity in December - Apollo, PA
  • Average humidity in December: 84%

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in December
Apollo, PA

Average rainfall in December - Apollo, PA
  • Average rainfall in December: 1.38"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is November (1.02").

Average rainfall days in December
Apollo, PA

Average rainfall days in December - Apollo, PA
  • Average rainfall days in December: 10.1 days

The month with the highest number of rainy days is May (17.6 days).
The months with the least rainy days are January and February (7.8 days).

Average snowfall in December
Apollo, PA

Average snowfall in December - Apollo, PA
  • Average snowfall in December: 2.2"

The month with the highest snowfall is February (2.8").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Apollo, PA

Average snowfall days in December - Apollo, PA
  • Average snowfall days in December: 9.1 days

The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Apollo, PA

Average daylight in December / Average sunshine in December - Apollo, 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 18min).

  • Average sunshine in December: 3h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

Average sunshine days in December
Apollo, PA

Average sunshine days in December - Apollo, PA
  • Average sunshine days in December: 14 days

The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is May (10 days).

Average UV index in December
Apollo, PA

Average UV index in December - Apollo, PA
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Apollo, PA

Average cloud cover in December - Apollo, PA
  • Average cloud cover in December: 67

The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in December
Apollo, PA

Average visibility in December - Apollo, PA
  • Average visibility in December: 5mi

The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).

Apollo, Pennsylvania, USA

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