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's arrival comes with a decrease in the average high-temperature, moving from a fresh 52.7°F (11.5°C) in November to a cold 41.5°F (5.3°C). Throughout December nights, Harrisburg experiences a consistent temperature average of 28.4°F (-2°C).Humidity
The average relative humidity in December is 76%.Rainfall
In Harrisburg, in December, during 4.5 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Harrisburg, during the entire year, the rain falls for 95.5 days and collects up to 8.62" (219mm) of precipitation.Snowfall
January through March, October through December are months with snowfall. In Harrisburg, in December, during 3.3 snowfall days, 0.31" (8mm) of snow is typically accumulated. In Harrisburg, during the entire year, snow falls for 17 days and aggregates up to 1.93" (49mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:57 pm CST.
Sunshine
In Harrisburg, the average sunshine in December is 5h.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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 2 during December translates into the following guidance:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December in Harrisburg?
What time are sunrise and sunset in December?
How many hours of sunshine does Harrisburg have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Harrisburg, MO
- Average high temperature in December: 41.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 28.4°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Harrisburg, MO
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Harrisburg, MO
- Average wind speed in December: 9mph
The windiest months (with the highest average wind speed) are January and March (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Harrisburg, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Harrisburg, MO
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (1.3").
The driest months (with the least rainfall) are January and February (0.43").
Average rainfall days in December
Harrisburg, MO
- Average rainfall days in December: 4.5 days
The months with the highest number of rainy days are April and May (11.3 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in December
Harrisburg, MO
- Average snowfall in December: 0.31"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Harrisburg, MO
- Average snowfall days in December: 3.3 days
The month with the highest number of snowfall days is February (5.3 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
Harrisburg, MO
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 5h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days in December
Harrisburg, MO
- Average sunshine days in December: 23.7 days
The month with the most sunshine days is December (23.7 days).
The month with the least sunshine days is May (15.6 days).
Average UV index in December
Harrisburg, MO
- 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
Harrisburg, MO
- Average cloud cover in December: 47
The months with the most cloud cover are January, February and March (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in December
Harrisburg, MO
- 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).
Harrisburg, Missouri, USA
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