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
December involves a decrease in temperature, down from a chilly 45.9°F (7.7°C) in November to an icy 34.9°F (1.6°C). In Cassopolis, a slight decrease from the daytime peak is noted during the month of December, with an average low-temperature of 25.9°F (-3.4°C).Humidity
In Cassopolis, the average relative humidity in December is 84%.Rainfall
In December, the rain falls for 5.4 days. Throughout December, 0.55" (14mm) of precipitation is accumulated. In Cassopolis, during the entire year, the rain falls for 112.7 days and collects up to 10" (254mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Cassopolis, during December, snow falls for 10.1 days and regularly aggregates up to 0.59" (15mm) of snow. Throughout the year, there are 46.4 snowfall days, and 5.87" (149mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:52 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 5:23 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 1 in December leads to these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Stay sun-safe with clothing that is both closely woven and worn loosely. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in Cassopolis?
How many days does it rain in December?
How many days does it snow in December in Cassopolis?
What is the month with the shortest days?
How many hours of daylight does Cassopolis have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Cassopolis, MI
- Average high temperature in December: 34.9°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Cassopolis, MI
- Average pressure in December: 30.09"Hg
The months with the highest atmospheric pressure are January, March, November and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Cassopolis, MI
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Cassopolis, MI
- Average humidity in December: 84%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in December
Cassopolis, MI
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is June (1.34").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Cassopolis, MI
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is May (13.8 days).
The months with the least rainy days are January and February (4.1 days).
Average snowfall in December
Cassopolis, MI
- Average snowfall in December: 0.59"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Cassopolis, MI
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cassopolis, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in December
Cassopolis, MI
- Average sunshine days in December: 18.5 days
The months with the most sunshine days are March and November (18.7 days).
The month with the least sunshine days is June (13.2 days).
Average UV index in December
Cassopolis, MI
- Average UV index in December: 1
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Cassopolis, MI
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Cassopolis, MI
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
Cassopolis, Michigan, USA
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