December weather forecastIron Mountain Lake, MO
December
Weather in December
The first month of the winter, December, is still a chilly month in Iron Mountain Lake, Missouri, with an average temperature fluctuating between 30.2°F (-1°C) and 43.7°F (6.5°C).Temperature
With December's arrival, Iron Mountain Lake sees a decrease in average high-temperatures, moving from a fresh 53.2°F (11.8°C) in November to a chilly 43.7°F (6.5°C). Throughout December nights, Iron Mountain Lake experiences a consistent temperature average of 30.2°F (-1°C).Humidity
In Iron Mountain Lake, the average relative humidity in December is 77%.Rainfall
In Iron Mountain Lake, in December, it is raining for 7.9 days, with typically 2.36" (60mm) of accumulated precipitation. Throughout the year, in Iron Mountain Lake, there are 154.7 rainfall days, and 32.64" (829mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Iron Mountain Lake, during December, snow falls for 5 days and regularly aggregates up to 1.77" (45mm) of snow. In Iron Mountain Lake, during the entire year, snow falls for 22.6 days and aggregates up to 9.06" (230mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:44 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:54 pm CST.
Sunshine
In Iron Mountain Lake, Missouri, the average sunshine in December is 4.9h.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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 2 in December leads to these recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. 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
Iron Mountain Lake, MO
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (39.6°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in December
Iron Mountain Lake, 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 (29.93"Hg).
Average wind speed in December
Iron Mountain Lake, MO
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Iron Mountain Lake, MO
- Average humidity in December: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Iron Mountain Lake, MO
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Iron Mountain Lake, MO
- Average rainfall days in December: 7.9 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is December (7.9 days).
Average snowfall in December
Iron Mountain Lake, MO
- Average snowfall in December: 1.77"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Iron Mountain Lake, MO
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is February (6.5 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
Iron Mountain Lake, 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: 4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in December
Iron Mountain Lake, MO
- Average sunshine days in December: 18.9 days
The months with the most sunshine days are November and December (18.9 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in December
Iron Mountain Lake, MO
- Average UV index in December: 2
The months with the highest UV index are May, 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
Iron Mountain Lake, MO
- Average cloud cover in December: 48
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in December
Iron Mountain Lake, MO
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).
