December weather forecast
Waller, PA

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Weather in December

December, the first month of the winter in Waller, is also a wintry month, with an average temperature varying between 37.6°F (3.1°C) and 27°F (-2.8°C).

Temperature

Waller in December undergoes a mild reduction in the average high-temperature, shifting from November's frosty 47.3°F (8.5°C) to an icy 37.6°F (3.1°C). In the month of December, the temperature generally rests at an average low of 27°F (-2.8°C).

Humidity

The average relative humidity in December in Waller, Pennsylvania, is 82%.

Rainfall

In Waller, during December, the rain falls for 12.4 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Waller, during the entire year, the rain falls for 166.3 days and collects up to 31.06" (789mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Waller, in December, during 9.4 snowfall days, 3.94" (100mm) of snow is typically accumulated. In Waller, during the entire year, snow falls for 47.6 days and aggregates up to 22.91" (582mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year in Waller.
On the first day of the month, sunrise is at 7:12 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:31 am and sunset at 4:46 pm EST.

Sunshine

The average sunshine in December is 4.1h.

UV index

The month with the lowest UV index in Waller is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: During December, 1 as the daily maximum UV index converts into the following advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
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Frequently asked questions

How cold does it get in Waller in December?

In December, in Waller, the average high-temperature is 37.6°F (3.1°C), and the average low-temperature is 27°F (-2.8°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is estimated at 87.8°F (31°C).

What is the average humidity in December in Waller?

In Waller, the average relative humidity in December is 82%.

How many days does it rain in December in Waller?

In Waller, Pennsylvania, in December, during 12.4 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

How much does it snow in Waller in December?

In Waller, in December, during 9.4 snowfall days, 3.94" (100mm) of snow is typically accumulated.

What is the month with the shortest days in Waller?

The month with the shortest days in Waller is December, with an average of 9h and 18min of daylight.

What is the average length of the day in December in Waller?

In Waller, Pennsylvania, the average day length in December is 9h and 16min.

What time are sunrise and sunset in December in Waller?

On the first day of December in Waller, sunrise is at 7:12 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:46 pm EST.

How long on average sun shines in December in Waller?

In Waller, Pennsylvania, the average sunshine duration in December is 4.1h.

When is the lowest UV index in Waller?

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

What is the UV index intensity in December in Waller?

In December, the average daily maximum UV index is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.
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
Waller, PA

Average temperature in December - Waller, PA
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (19°F).

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Average pressure in December
Waller, PA

Average pressure in December - Waller, PA
  • Average pressure in December: 30.09"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).

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Average wind speed in December
Waller, PA

Average wind speed in December - Waller, PA
  • Average wind speed in December: 7.5mph

The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in December
Waller, PA

Average humidity in December - Waller, PA
  • Average humidity in December: 82%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).

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Average rainfall in December
Waller, PA

Average rainfall in December - Waller, PA
  • Average rainfall in December: 2.52"

The wettest months (with the highest rainfall) are April and May (2.99").
The driest month (with the least rainfall) is September (2.05").

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Average rainfall days in December
Waller, PA

Average rainfall days in December - Waller, PA
  • Average rainfall days in December: 12.4 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in December
Waller, PA

Average snowfall in December - Waller, PA
  • Average snowfall in December: 3.94"

The month with the highest snowfall is January (5.94").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Waller, PA

Average snowfall days in December - Waller, PA
  • Average snowfall days in December: 9.4 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).

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

Average daylight in December / Average sunshine in December - Waller, PA
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days in December
Waller, PA

Average sunshine days in December - Waller, PA
  • Average sunshine days in December: 12.5 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (9.8 days).

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Average UV index in December
Waller, PA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in December
Waller, PA

Average cloud cover in December - Waller, PA
  • Average cloud cover in December: 58

The months with the most cloud cover are February and December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 35).

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Average visibility in December
Waller, PA

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

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

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Waller, Pennsylvania, USA

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