December weather forecastDiamond, MO
December
Weather in December
The first month of the winter, December, is still a chilly month in Diamond, Missouri, with an average temperature fluctuating between 46.2°F (7.9°C) and 31.3°F (-0.4°C).Temperature
The onset of December comes with a shift in the average high-temperature, falling from a mild 56.3°F (13.5°C) in November to a frosty 46.2°F (7.9°C). During December, the nighttime temperature averages of 31.3°F (-0.4°C).Humidity
In Diamond, the average relative humidity in December is 74%.Rainfall
The months with the least rainfall in Diamond are February and December Rain falls for 5.1 days and accumulates 0.59" (15mm) of rain.Snowfall
Months with snowfall are January through March, May, November and December. In Diamond, in December, during 1.8 snowfall days, 0.16" (4mm) of snow is typically accumulated. Throughout the year, there are 8.5 snowfall days, and 1.14" (29mm) of snow is accumulated.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:12 am and sunset at 5:00 pm. On the last day of December, in Diamond, sunrise is at 7:30 am and sunset at 5:10 pm CST.
Sunshine
In Diamond, the average sunshine in December is 5.5h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Diamond, MO
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (43.2°F).
- Average low temperature in December: 31.3°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in December
Diamond, MO
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Diamond, MO
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in December
Diamond, MO
- Average humidity in December: 74%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in December
Diamond, MO
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are February and December (0.59").
Average rainfall days in December
Diamond, MO
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is December (5.1 days).
Average snowfall in December
Diamond, MO
- Average snowfall in December: 0.16"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in December
Diamond, MO
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Diamond, MO
- Average daylight in December: 9h and 42min
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 42min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in December
Diamond, MO
- Average sunshine days in December: 23.7 days
The month with the most sunshine days is December (23.7 days).
The month with the least sunshine days is May (14.1 days).
Average UV index in December
Diamond, MO
- Average UV index in December: 2
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Diamond, MO
- Average cloud cover in December: 40
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in December
Diamond, 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).
