December weather forecast
Walston, PA

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Weather in December

December, the first month of the winter in Walston, is still a cold month, with an average temperature fluctuating between 36.7°F (2.6°C) and 25.7°F (-3.5°C).

Temperature

In December, the meteorological conditions alter, with the average high-temperature shifting from a chilly 46.2°F (7.9°C) in November to an icy 36.7°F (2.6°C). Walston's December nights cool down to an average low-temperature of 25.7°F (-3.5°C).

Humidity

In December, the average relative humidity is 86%.

Rainfall

In Walston, during December, the rain falls for 10.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, in Walston, there are 151.9 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Walston. In Walston, during December, snow falls for 14.6 days and regularly aggregates up to 4.21" (107mm) of snow. In Walston, during the entire year, snow falls for 71 days and aggregates up to 22.32" (567mm) 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 in Walston, sunrise is at 7:22 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:57 pm EST.

Sunshine

In Walston, Pennsylvania, the average sunshine in December is 2.6h.

UV index

December is the month with the lowest UV index in Walston, Pennsylvania, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold is it in Walston in December?

The high-temperature, in December, in Walston, records 36.7°F (2.6°C), while the low-temperature is 25.7°F (-3.5°C). In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is evaluated at 86°F (30°C).

What is the average humidity in December in Walston?

The average relative humidity in December in Walston, Pennsylvania, is 86%.

How much does it rain in Walston in December?

In December, the rain falls for 10.5 days. Throughout December, 1.73" (44mm) of precipitation is accumulated.

How much does it snow in Walston in December?

In Walston, Pennsylvania, in December, during 14.6 snowfall days, 4.21" (107mm) of snow is typically accumulated.

What is the month with the shortest days in Walston?

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

How many hours of daylight does Walston have in December?

In December, the average day length is 9h and 17min.

What time are sunrise and sunset in December in Walston?

On the first day of December, sunrise is at 7:22 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:57 pm EST.

How long on average sun shines in December in Walston?

In December, the average sunshine duration is 2.6h.

What is the month with the lowest UV index in Walston?

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

How high is the UV index in December in Walston?

The average daily maximum UV index in December in Walston, Pennsylvania, is 1. A UV Index estimate of 2, and below, represents a low health risk 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
Walston, PA

Average temperature in December - Walston, PA
  • Average high temperature in December: 36.7°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in December: 25.7°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

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Average pressure in December
Walston, PA

Average pressure in December - Walston, 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).

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Average wind speed in December
Walston, PA

Average wind speed in December - Walston, PA
  • Average wind speed in December: 8.6mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in December
Walston, PA

Average humidity in December - Walston, PA
  • Average humidity in December: 86%

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).

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Average rainfall in December
Walston, PA

Average rainfall in December - Walston, PA
  • Average rainfall in December: 1.73"

The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is November (1.26").

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Average rainfall days in December
Walston, PA

Average rainfall days in December - Walston, PA
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in December
Walston, PA

Average snowfall in December - Walston, PA
  • Average snowfall in December: 4.21"

The month with the highest snowfall is January (5.63").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Walston, PA

Average snowfall days in December - Walston, PA
  • Average snowfall days in December: 14.6 days

The month with the highest number of snowfall days is January (18.6 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
Walston, PA

Average daylight in December / Average sunshine in December - Walston, 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: 2h and 4min

The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in December
Walston, PA

Average sunshine days in December - Walston, PA
  • Average sunshine days in December: 9.2 days

The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is February (7.8 days).

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Average UV index in December
Walston, PA

Average UV index in December - Walston, 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
Walston, PA

Average cloud cover in December - Walston, PA
  • Average cloud cover in December: 72

The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 39).

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Average visibility in December
Walston, PA

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

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).

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Walston, Pennsylvania, USA

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