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
The onset of December is marked by a decrease in temperature, transitioning from a fresh 50.9°F (10.5°C) in November to a wintry 39.7°F (4.3°C). In December, Palmyra encounters an average low-temperature of 28.6°F (-1.9°C) during the night.Humidity
The average relative humidity in December in Palmyra is 78%.Rainfall
The month with the least rainfall is December, when the rain falls for 8.5 days and typically collects 1.73" (44mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Palmyra, in December, snow falls for 4.9 days, with typically accumulated 1.69" (43mm) of snow. In Palmyra, during the entire year, snow falls for 25.5 days and aggregates up to 9.09" (231mm) of snow.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 7:01 am and sunset at 4:36 pm. On the last day of December, in Palmyra, sunrise is at 7:20 am and sunset at 4:46 pm CST.
Sunshine
In December, the average sunshine in Palmyra is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
Is December cold in Palmyra?
What is the average humidity in December in Palmyra?
What is the driest month in Palmyra?
How many days does it rain in December in Palmyra?
How much does it snow in Palmyra in December?
What is the month with the shortest days in Palmyra?
What is the average length of the day in December in Palmyra?
When is the sunrise / sunset in December in Palmyra?
How many hours of sunshine does Palmyra have in December?
What are the months with the lowest UV index in Palmyra?
What is the UV index reading in December in Palmyra?
Average temperature in December
Palmyra, IL
- Average high temperature in December: 39.7°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Palmyra, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Palmyra, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
Palmyra, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Palmyra, IL
- Average rainfall in December: 1.73"
The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is December (1.73").
Average rainfall days in December
Palmyra, IL
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Palmyra, IL
- Average snowfall in December: 1.69"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Palmyra, IL
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (8.5 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
Palmyra, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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 June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Palmyra, IL
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in December
Palmyra, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Palmyra, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility in December
Palmyra, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Palmyra, Illinois, USA
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