December weather forecast
Lyons, PA

Share

Weather in December

December, the first month of the winter in Lyons, is also an icy month, with an average temperature ranging between min 29.1°F (-1.6°C) and max 40.1°F (4.5°C).

Temperature

December involves a decrease in temperature, down from a frosty 49.8°F (9.9°C) in November to a cold 40.1°F (4.5°C). During December, Lyons's temperature falls to a steady low-temperature average of 29.1°F (-1.6°C).

Humidity

In Lyons, the average relative humidity in December is 80%.

Rainfall

In Lyons, in December, it is raining for 10.1 days, with typically 2.05" (52mm) of accumulated precipitation. In Lyons, during the entire year, the rain falls for 147.9 days and collects up to 25.94" (659mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Lyons. In December, it is snowing for 4.5 days. Throughout December, 1.5" (38mm) of snow is accumulated. Throughout the year, there are 24.9 snowfall days, and 13.54" (344mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:07 am and sunset at 4:36 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:46 pm EST.

Sunshine

In Lyons, Pennsylvania, the average sunshine in December is 4.7h.

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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 2 in December translates into these instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during December?

In Lyons, in December, the average high-temperature is 40.1°F (4.5°C), and the average low-temperature is 29.1°F (-1.6°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is calculated to be 86°F (30°C).

What is the average humidity in December?

In Lyons, the average relative humidity in December is 80%.

How many days does it rain in December?

In Lyons, in December, it is raining for 10.1 days, with typically 2.05" (52mm) of accumulated precipitation.

How many days does it snow in December?

In December, in Lyons, it is snowing for 4.5 days. Throughout December, 1.5" (38mm) of snow is accumulated.

What is the month with the shortest days?

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

How many hours of daylight does Lyons have in December?

In December, the average day length is 9h and 20min.

When is the sunrise / sunset in December?

On the first day of December in Lyons, sunrise is at 7:07 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:46 pm EST.

How many hours of sunshine does Lyons have in December?

The average sunshine duration in December is 4.7h.

What are the months with the lowest UV index?

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?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health 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
Lyons, PA

Average temperature in December - Lyons, PA
  • Average high temperature in December: 40.1°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 (34.3°F).

  • Average low temperature in December: 29.1°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

Average pressure in December
Lyons, PA

Average pressure in December - Lyons, PA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Lyons, PA

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

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Lyons, PA

Average humidity in December - Lyons, PA
  • Average humidity in December: 80%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
Lyons, PA

Average rainfall in December - Lyons, PA
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in December
Lyons, PA

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

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.2 days).

Average snowfall in December
Lyons, PA

Average snowfall in December - Lyons, PA
  • Average snowfall in December: 1.5"

The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Lyons, PA

Average snowfall days in December - Lyons, PA
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in December
Lyons, PA

Average sunshine days in December - Lyons, PA
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (11 days).

Average UV index in December
Lyons, PA

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

The months with the highest UV index are 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
Lyons, PA

Average cloud cover in December - Lyons, PA
  • Average cloud cover in December: 51

The months with the most cloud cover are February and December (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in December
Lyons, PA

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

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

Lyons, Pennsylvania, USA

Weather forecast for your location

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