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
Hannibal's December weather comes with a decrease in average high-temperatures, moving from a fresh 51.4°F (10.8°C) in November to an icy 39.6°F (4.2°C). During December, the nighttime temperature averages to a freezing cold 27.1°F (-2.7°C).Humidity
In December, the average relative humidity is 77%.Rainfall
In Hannibal, during December, the rain falls for 6.9 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, there are 136 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Hannibal, Missouri, in December, snow falls for 4.2 days, with typically accumulated 1.26" (32mm) of snow. In Hannibal, Missouri, during the entire year, snow falls for 20 days and aggregates up to 8.5" (216mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:07 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:51 pm CST.
Sunshine
In Hannibal, the average sunshine in December is 4.9h.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 value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Hannibal have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Hannibal, MO
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Hannibal, MO
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Hannibal, MO
- Average wind speed in December: 9.5mph
The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in December
Hannibal, MO
- Average humidity in December: 77%
The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Hannibal, MO
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Hannibal, MO
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Hannibal, MO
- Average snowfall in December: 1.26"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Hannibal, MO
- Average snowfall days in December: 4.2 days
The month with the highest number of snowfall days is January (6.2 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
Hannibal, MO
- 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 July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Hannibal, MO
- Average sunshine days in December: 20.3 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in December
Hannibal, 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
Hannibal, MO
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Hannibal, 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).
Hannibal, Missouri, USA
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