December weather forecastFairfax, MO
December
Weather in December
December, the first month of the winter in Fairfax, is also an icy month, with an average temperature ranging between max 36.5°F (2.5°C) and min 23.9°F (-4.5°C).Temperature
Fairfax's December weather features a mild decline in high-temperatures, reducing from a cool 50.2°F (10.1°C) in November to a cold 36.5°F (2.5°C). An average low-temperature of 23.9°F (-4.5°C) is noted during the month of December.Humidity
In Fairfax, the average relative humidity in December is 76%.Rainfall
In Fairfax, during December, the rain falls for 4 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 120.8 rainfall days, and 24.09" (612mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Fairfax, during December, snow falls for 4.5 days and regularly aggregates up to 1.46" (37mm) of snow. Throughout the year, there are 23.5 snowfall days, and 10.51" (267mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:44 am and sunset at 5:05 pm CST.
Sunshine
In December, the average sunshine is 5.2h.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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: The average daily UV index of 2 in December transforms into the following instructions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fairfax, MO
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 23.9°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 (18.5°F).
Average pressure in December
Fairfax, 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 (29.87"Hg).
Average wind speed in December
Fairfax, MO
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are March and April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Fairfax, MO
- Average humidity in December: 76%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Fairfax, MO
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is June (4.21").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Fairfax, MO
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Fairfax, MO
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Fairfax, MO
- Average snowfall days in December: 4.5 days
The months with the highest number of snowfall days are January and February (6.7 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
Fairfax, MO
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Fairfax, MO
- Average sunshine days in December: 21.5 days
The months with the most sunshine days are November and December (21.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in December
Fairfax, 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
Fairfax, MO
- Average cloud cover in December: 43
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Fairfax, 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).
