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
La Harpe, Illinois, in December experiences a subtle temperature decline, with average high-temperatures reducing from a frosty 48.9°F (9.4°C) in November to a cold 37°F (2.8°C). Nighttime temperature in La Harpe experiences an average drop to a freezing cold 25.5°F (-3.6°C) in December.Humidity
The average relative humidity in December in La Harpe is 79%.Rainfall
In La Harpe, Illinois, in December, during 5.6 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In La Harpe, during the entire year, the rain falls for 127.6 days and collects up to 21.02" (534mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In La Harpe, during December, snow falls for 5.4 days and regularly aggregates up to 1.3" (33mm) of snow. In La Harpe, during the entire year, snow falls for 26.4 days and aggregates up to 9.06" (230mm) 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 La Harpe, sunrise is at 7:08 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:47 pm CST.
Sunshine
The average sunshine in December in La Harpe, Illinois, is 4.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
How cold is December in La Harpe?
What is the average humidity in December in La Harpe?
How much does it rain in La Harpe in December?
How many days does it snow in December in La Harpe?
What is the month with the shortest days in La Harpe?
What is the average length of the day in December in La Harpe?
When is the sunrise / sunset in December in La Harpe?
How many hours of sunshine does La Harpe have in December?
When is the lowest UV index in La Harpe?
What is the UV index reading in December in La Harpe?
Average temperature in December
La Harpe, IL
- Average high temperature in December: 37°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
La Harpe, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
La Harpe, IL
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in December
La Harpe, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
La Harpe, IL
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in December
La Harpe, IL
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in December
La Harpe, IL
- Average snowfall in December: 1.3"
The month with the highest snowfall is January (3.15").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
La Harpe, IL
- Average snowfall days in December: 5.4 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
La Harpe, IL
- 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 3min
The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
La Harpe, IL
- Average sunshine days in December: 20 days
The month with the most sunshine days is December (20 days).
The months with the least sunshine days are May and June (11.8 days).
Average UV index in December
La Harpe, 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
La Harpe, IL
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
La Harpe, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
La Harpe, Illinois, USA
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