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 onset, the average high-temperature recedes from November's fresh 53.4°F (11.9°C) to a frosty 43°F (6.1°C). An average low-temperature of 30.6°F (-0.8°C) is expected during December.Humidity
In Byrnes Mill, the average relative humidity in December is 75%.Rainfall
In December, in Byrnes Mill, the rain falls for 7.2 days. Throughout December, 2.01" (51mm) of precipitation is accumulated. In Byrnes Mill, during the entire year, the rain falls for 141.7 days and collects up to 32.01" (813mm) of precipitation.Snowfall
Months with snowfall are January through March, September, November and December. In Byrnes Mill, Missouri, during December, snow falls for 3.6 days and regularly aggregates up to 0.87" (22mm) of snow. In Byrnes Mill, Missouri, during the entire year, snow falls for 18.9 days and aggregates up to 7.2" (183mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:01 am and sunset at 4:41 pm. On the last day of December, in Byrnes Mill, sunrise is at 7:19 am and sunset at 4:51 pm CST.
Sunshine
In Byrnes Mill, the average sunshine in December is 4.8h.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 low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold is December in Byrnes Mill?
What is the average humidity in December in Byrnes Mill?
How much does it rain in Byrnes Mill in December?
How many days does it snow in December in Byrnes Mill?
What is the month with the shortest days in Byrnes Mill?
What is the average length of the day in December in Byrnes Mill?
What time are sunrise and sunset in December in Byrnes Mill?
How long on average sun shines in December in Byrnes Mill?
What are the months with the lowest UV index in Byrnes Mill?
What is the UV index reading in December in Byrnes Mill?
Average temperature in December
Byrnes Mill, MO
- Average high temperature in December: 43°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in December
Byrnes Mill, 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
Byrnes Mill, MO
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Byrnes Mill, MO
- Average humidity in December: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Byrnes Mill, MO
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days in December
Byrnes Mill, MO
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Byrnes Mill, MO
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (2.52").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in December
Byrnes Mill, MO
- Average snowfall days in December: 3.6 days
The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are April, May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Byrnes Mill, 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Byrnes Mill, MO
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is December (20.1 days).
The months with the least sunshine days are May and July (12.6 days).
Average UV index in December
Byrnes Mill, MO
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Byrnes Mill, MO
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in December
Byrnes Mill, 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).
Byrnes Mill, Missouri, USA
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