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 move into December indicates a reduction in the average high-temperature, down from November's fresh 51.6°F (10.9°C) to an icy 40.3°F (4.6°C). In the month of December, Vandalia experiences an average low-temperature of 28°F (-2.2°C).Humidity
In December, the average relative humidity is 77%.Rainfall
In Vandalia, in December, during 6.7 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Vandalia, during the entire year, the rain falls for 142.4 days and collects up to 28.98" (736mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Vandalia, in December, snow falls for 4.2 days, with typically accumulated 1.54" (39mm) of snow. Throughout the year, in Vandalia, there are 22.8 snowfall days, and 10.71" (272mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:07 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:52 pm CST.
Sunshine
The average sunshine in December in Vandalia is 4.9h.UV index
The months with the lowest UV index in Vandalia are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following 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. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
Is December cold in Vandalia?
What is the average humidity in December in Vandalia?
How many days does it rain in December in Vandalia?
How many days does it snow in December in Vandalia?
What is the month with the shortest days in Vandalia?
What is the average length of the day in December in Vandalia?
What time are sunrise and sunset in December in Vandalia?
How many hours of sunshine does Vandalia have in December?
What is the month with the lowest UV index in Vandalia?
What is the UV index reading in December in Vandalia?
Average temperature in December
Vandalia, MO
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Vandalia, MO
- Average pressure in December: 30.12"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
Vandalia, MO
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Vandalia, MO
- Average humidity in December: 77%
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Vandalia, MO
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Vandalia, MO
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Vandalia, MO
- Average snowfall in December: 1.54"
The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Vandalia, MO
- Average snowfall days in December: 4.2 days
The month with the highest number of snowfall days is January (7.5 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
Vandalia, 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: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Vandalia, MO
- Average sunshine days in December: 20 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Vandalia, 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
Vandalia, MO
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in December
Vandalia, 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).
Vandalia, Missouri, USA
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