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
Herculaneum's progression into December includes a drop in the average high-temperature, from a cool 54°F (12.2°C) in November to a chilly 43.5°F (6.4°C). In the month of December, Herculaneum records a consistent average low-temperature of 30.7°F (-0.7°C).Humidity
In Herculaneum, the average relative humidity in December is 76%.Rainfall
In Herculaneum, in December, it is raining for 8.6 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 155 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Snowfall
Months with snowfall in Herculaneum are January through March, November and December. In Herculaneum, in December, during 3.9 snowfall days, 2.05" (52mm) of snow is typically accumulated. In Herculaneum, during the entire year, snow falls for 19.9 days and aggregates up to 8.43" (214mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 4:41 pm. On the last day of December, in Herculaneum, sunrise is at 7:18 am and sunset at 4:51 pm CST.
Sunshine
In December, the average sunshine in Herculaneum is 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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold does it get in Herculaneum in December?
What is the average humidity in December in Herculaneum?
How much does it rain in Herculaneum in December?
How many days does it snow in December in Herculaneum?
What is the month with the shortest days in Herculaneum?
What is the average length of the day in December in Herculaneum?
When are sunrise and sunset in December in Herculaneum?
How many hours of sunshine does Herculaneum have in December?
What are the months with the lowest UV index in Herculaneum?
What is the UV index intensity in December in Herculaneum?
Average temperature in December
Herculaneum, MO
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in December
Herculaneum, 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 (29.92"Hg).
Average wind speed in December
Herculaneum, MO
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Herculaneum, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Herculaneum, MO
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days in December
Herculaneum, MO
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Herculaneum, MO
- Average snowfall in December: 2.05"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Herculaneum, MO
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Herculaneum, MO
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Herculaneum, MO
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Herculaneum, MO
- Average UV index in December: 2
The months with the highest UV index are May, 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
Herculaneum, MO
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility in December
Herculaneum, 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).
Herculaneum, Missouri, USA
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