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
With December's arrival, Washington sees a decrease in average high-temperatures, moving from a fresh 53.8°F (12.1°C) in November to a frosty 43.2°F (6.2°C). In December, the average low-temperature records at a freezing cold 29.7°F (-1.3°C) during the nights.Humidity
The average relative humidity in December is 76%.Rainfall
In Washington, Missouri, in December, it is raining for 6.5 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in Washington, there are 133.1 rainfall days, and 27.24" (692mm) of precipitation is accumulated.Snowfall
January through March, September, November and December are months with snowfall in Washington. In Washington, Missouri, during December, snow falls for 3.5 days and regularly aggregates up to 1.22" (31mm) of snow. Throughout the year, there are 16.6 snowfall days, and 5.87" (149mm) 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 the month, sunrise is at 7:03 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:53 pm CST.
Sunshine
In December, the average sunshine in Washington is 4.8h.UV index
The months with the lowest UV index in Washington are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Enhance your sun protection with tightly woven, yet airy clothing. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
Is December cold in Washington?
What is the average humidity in December in Washington?
How much does it rain in Washington in December?
How many days does it snow in December in Washington?
What is the month with the shortest days in Washington?
How many hours of daylight does Washington have in December?
When is the sunrise / sunset in December in Washington?
How many hours of sunshine does Washington have in December?
When is the lowest UV index in Washington?
What is the UV index intensity in December in Washington?
Average temperature in December
Washington, MO
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in December: 29.7°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in December
Washington, 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 (29.92"Hg).
Average wind speed in December
Washington, MO
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Washington, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Washington, MO
- Average rainfall in December: 1.57"
The wettest months (with the highest rainfall) are April and May (3.23").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in December
Washington, MO
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in December
Washington, MO
- Average snowfall in December: 1.22"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in December
Washington, MO
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Washington, MO
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Washington, MO
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in December
Washington, 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
Washington, MO
- Average cloud cover in December: 48
The months with the most cloud cover are January and February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 30).
Average visibility in December
Washington, MO
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, September, October, November and December (6mi).
The months with the lowest visibility are May and August (5mi).
Washington, Missouri, USA
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