December weather forecast
Wellsville, PA

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Weather in December

The first month of the winter, December, is also a wintry month in Wellsville, Pennsylvania, with temperature in the range of an average high of 41°F (5°C) and an average low of 29.7°F (-1.3°C).

Temperature

Arrival of December comes with a reduction in the average high-temperature, falling from a cool 50.5°F (10.3°C) in November to a wintry 41°F (5°C). Wellsville's average low-temperature for the month of December records at a subzero cold 29.7°F (-1.3°C).

Humidity

In Wellsville, Pennsylvania, the average relative humidity in December is 79%.

Rainfall

In Wellsville, during December, the rain falls for 9.5 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Wellsville, during the entire year, the rain falls for 137.7 days and collects up to 18.43" (468mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Wellsville, in December, during 4.4 snowfall days, 1.14" (29mm) of snow is typically accumulated. Throughout the year, there are 23.7 snowfall days, and 8.62" (219mm) 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 7:11 am and sunset at 4:42 pm. On the last day of December, in Wellsville, sunrise is at 7:29 am and sunset at 4:52 pm EST.

Sunshine

The average sunshine in December is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: In December, a daily UV index of 2 turns into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.

Frequently asked questions

Is December cold?

The average high-temperature, in December, in Wellsville, is 41°F (5°C), while the average low-temperature is 29.7°F (-1.3°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, 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, the rain falls for 9.5 days. Throughout December, 1.26" (32mm) of precipitation is accumulated.

How much does it snow in December?

In December, it is snowing for 4.4 days. Throughout December, 1.14" (29mm) of snow is 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.

How many hours of daylight does Wellsville have in December?

The average day length in December is 9h and 23min.

When is the sunrise / sunset in December in Wellsville?

In December, on the first day of the month, sunrise is at 7:11 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:52 pm EST.

How many hours of sunshine does Wellsville have in December?

In December, the average sunshine duration is 4.8h.

When is the lowest UV index in Wellsville?

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

What is the UV index intensity in December?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to 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
Wellsville, PA

Average temperature in December - Wellsville, PA
  • Average high temperature in December: 41°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in December: 29.7°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in December
Wellsville, PA

Average pressure in December - Wellsville, PA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in December
Wellsville, PA

Average wind speed in December - Wellsville, PA
  • Average wind speed in December: 7.8mph

The windiest months (with the highest average wind speed) are February, March and April (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

Average humidity in December
Wellsville, PA

Average humidity in December - Wellsville, PA
  • Average humidity in December: 79%

The months with the highest relative humidity are February and May (80%).
The month with the lowest relative humidity is April (75%).

Average rainfall in December
Wellsville, PA

Average rainfall in December - Wellsville, PA
  • Average rainfall in December: 1.26"

The wettest months (with the highest rainfall) are May and July (2.05").
The driest month (with the least rainfall) is January (1.14").

Average rainfall days in December
Wellsville, PA

Average rainfall days in December - Wellsville, PA
  • Average rainfall days in December: 9.5 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in December
Wellsville, PA

Average snowfall in December - Wellsville, PA
  • Average snowfall in December: 1.14"

The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Wellsville, PA

Average snowfall days in December - Wellsville, PA
  • Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Wellsville, 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
Wellsville, PA

Average sunshine days in December - Wellsville, PA
  • Average sunshine days in December: 18.1 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.2 days).

Average UV index in December
Wellsville, PA

Average UV index in December - Wellsville, PA
  • Average UV index in December: 2

The months with the highest UV index are May, June and July (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
Wellsville, PA

Average cloud cover in December - Wellsville, 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 30).

Average visibility in December
Wellsville, PA

Average visibility in December - Wellsville, PA
  • Average visibility in December: 6mi

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

Wellsville, Pennsylvania, USA

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