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
The transition into December indicates a reduction in the average high-temperature, down to an icy 32.9°F (0.5°C) from November's chilly 43.9°F (6.6°C). Nighttime temperature sees a small decrement from daytime highs, dipping to an average of 23.9°F (-4.5°C) during December.Humidity
In December, the average relative humidity is 85%.Rainfall
In December, in Saint Louis, the rain falls for 8 days. Throughout December, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 141.3 rainfall days, and 22.48" (571mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Saint Louis, Michigan, during December, snow falls for 14.5 days and regularly aggregates up to 3.62" (92mm) of snow. Throughout the year, in Saint Louis, there are 65.5 snowfall days, and 19.65" (499mm) of snow is accumulated.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Saint Louis, Michigan.On the first day of the month, sunrise is at 7:51 am and sunset at 5:03 pm. On the last day of December, sunrise is at 8:10 am and sunset at 5:12 pm EST.
Sunshine
In December, the average sunshine is 3.2h.UV index
The months with the lowest UV index in Saint Louis, Michigan, are January, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In December, a regular UV index of 1 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Frequently asked questions
How cold is December in Saint Louis?
What is the average humidity in December in Saint Louis?
How much does it rain in Saint Louis in December?
How many days does it snow in December in Saint Louis?
What is the month with the shortest days in Saint Louis?
What is the average length of the day in December in Saint Louis?
When is the sunrise / sunset in December in Saint Louis?
How long on average sun shines in December in Saint Louis?
What are the months with the lowest UV index in Saint Louis?
What is the UV index intensity in December in Saint Louis?
Average temperature in December
Saint Louis, MI
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Saint Louis, MI
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Saint Louis, MI
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Saint Louis, MI
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Saint Louis, MI
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in December
Saint Louis, MI
- Average rainfall days in December: 8 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Saint Louis, MI
- Average snowfall in December: 3.62"
The month with the highest snowfall is January (5.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Saint Louis, MI
- Average snowfall days in December: 14.5 days
The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Louis, MI
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
Saint Louis, MI
- Average sunshine days in December: 11.5 days
The month with the most sunshine days is September (15.8 days).
The month with the least sunshine days is January (10.3 days).
Average UV index in December
Saint Louis, MI
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Saint Louis, MI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Saint Louis, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
Saint Louis, Michigan, USA
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