Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December involves a decrease in temperature, down from a frosty 46.8°F (8.2°C) in November to a cold 36.9°F (2.7°C). An average low-temperature of 26.4°F (-3.1°C) marks the nights in Lemont throughout December.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 84%.Rainfall
In Lemont, in December, it is raining for 12.6 days, with typically 2.52" (64mm) of accumulated precipitation. In Lemont, during the entire year, the rain falls for 175.7 days and collects up to 30.94" (786mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Lemont, in December, snow falls for 11.5 days, with typically accumulated 4.45" (113mm) of snow. Throughout the year, in Lemont, there are 59 snowfall days, and 26.3" (668mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:16 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:53 pm EST.
Sunshine
The average sunshine in December in Lemont is 3.7h.UV index
The month with the lowest UV index in Lemont is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 1 in December transforms into this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is it in Lemont in December?
What is the most humid month in Lemont?
What is the average humidity in December in Lemont?
How much does it rain in Lemont in December?
How many days does it snow in December in Lemont?
What is the month with the shortest days in Lemont?
What is the average length of the day in December in Lemont?
When are sunrise and sunset in December in Lemont?
How many hours of sunshine does Lemont have in December?
What is the month with the lowest UV index in Lemont?
What is the UV index intensity in December in Lemont?
Average temperature in December
Lemont, PA
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Lemont, 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
Lemont, PA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Lemont, PA
- Average humidity in December: 84%
The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Lemont, PA
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is November (2.01").
Average rainfall days in December
Lemont, PA
- Average rainfall days in December: 12.6 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (9.8 days).
Average snowfall in December
Lemont, PA
- Average snowfall in December: 4.45"
The month with the highest snowfall is February (6.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lemont, PA
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lemont, 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: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Lemont, PA
- Average sunshine days in December: 12 days
The month with the most sunshine days is November (14.5 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in December
Lemont, 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).
Average cloud cover in December
Lemont, PA
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Lemont, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Lemont, Pennsylvania, USA
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