December weather forecastArmstrong, MO
December
Weather in December
The first month of the winter, December, is also an icy month in Armstrong, Missouri, with an average temperature ranging between min 27.7°F (-2.4°C) and max 40.8°F (4.9°C).Temperature
During the transition into December, Armstrong observes a decrease in the average high-temperature, falling from a cool 52.3°F (11.3°C) in November to a wintry 40.8°F (4.9°C). In Armstrong, an average nighttime temperature of 27.7°F (-2.4°C) is expected during December.Humidity
In Armstrong, the average relative humidity in December is 76%.Rainfall
In December, the rain falls for 4.3 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. In Armstrong, during the entire year, the rain falls for 102.5 days and collects up to 10.91" (277mm) of precipitation.Snowfall
January through March, October through December are months with snowfall. In December, it is snowing for 3.1 days. Throughout December, 0.59" (15mm) of snow is accumulated. In Armstrong, during the entire year, snow falls for 17.3 days and aggregates up to 2.99" (76mm) of snow.Daylight
December has the shortest days of the year in Armstrong, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:12 am and sunset at 4:48 pm. On the last day of December, sunrise is at 7:30 am and sunset at 4:57 pm CST.
Sunshine
The average sunshine in December is 5.1h.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 health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Armstrong, MO
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Armstrong, 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 (29.91"Hg).
Average wind speed in December
Armstrong, MO
- Average wind speed in December: 9.1mph
The windiest months (with the highest average wind speed) are January and March (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Armstrong, 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 (71%).
Average rainfall in December
Armstrong, MO
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Armstrong, MO
- Average rainfall days in December: 4.3 days
The month with the highest number of rainy days is May (13.2 days).
The months with the least rainy days are February and December (4.3 days).
Average snowfall in December
Armstrong, MO
- Average snowfall in December: 0.59"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Armstrong, MO
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Armstrong, MO
- Average daylight in December: 9h and 30min
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: 5h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Armstrong, MO
- Average sunshine days in December: 23.6 days
The month with the most sunshine days is December (23.6 days).
The month with the least sunshine days is May (15.2 days).
Average UV index in December
Armstrong, 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
Armstrong, MO
- Average cloud cover in December: 45
The months with the most cloud cover are January and February (Cloud cover 48).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in December
Armstrong, 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).
