December weather forecastMorrisville, MO
December
Weather in December
December, the first month of the winter in Morrisville, is still a chilly month, with an average temperature fluctuating between 44.2°F (6.8°C) and 29.5°F (-1.4°C).Temperature
As November transitions into December, Morrisville sees a drop in the average high-temperature, transitioning from a fresh 54.9°F (12.7°C) to a frosty 44.2°F (6.8°C). December brings Morrisville a consistent average low-temperature of 29.5°F (-1.4°C).Humidity
The average relative humidity in December is 75%.Rainfall
The months with the least rainfall are January and December Rain falls for 6.9 days and accumulates 1.57" (40mm) of rain.Snowfall
January through May, November and December are months with snowfall. In Morrisville, in December, during 3.4 snowfall days, 1.22" (31mm) of snow is typically accumulated. Throughout the year, there are 18.4 snowfall days, and 8.35" (212mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December in Morrisville, sunrise is at 7:10 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:05 pm CST.
Sunshine
In December, the average sunshine is 5.5h.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 estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 2 in December leads to these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Morrisville, MO
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41°F).
- Average low temperature in December: 29.5°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in December
Morrisville, MO
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).
Average wind speed in December
Morrisville, MO
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in December
Morrisville, MO
- Average humidity in December: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Morrisville, MO
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (5.28").
The driest months (with the least rainfall) are January and December (1.57").
Average rainfall days in December
Morrisville, MO
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (17.4 days).
The months with the least rainy days are January and December (6.9 days).
Average snowfall in December
Morrisville, MO
- Average snowfall in December: 1.22"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Morrisville, MO
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Morrisville, MO
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Morrisville, MO
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Morrisville, 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
Morrisville, MO
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in December
Morrisville, 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).
