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 average high-temperature decreases in December, shifting from a frosty 44.6°F (7°C) in November to a wintry 33.3°F (0.7°C). December nights in Saint Johns, Michigan, witness a slight temperature decrease, averaging at a subzero cold 24.6°F (-4.1°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In Saint Johns, in December, it is raining for 7.2 days, with typically 1.18" (30mm) of accumulated precipitation. In Saint Johns, during the entire year, the rain falls for 137.2 days and collects up to 20.83" (529mm) of precipitation.Snowfall
Months with snowfall in Saint Johns are January through April, October through December. In Saint Johns, in December, snow falls for 14 days, with typically accumulated 3.35" (85mm) of snow. In Saint Johns, during the entire year, snow falls for 66.6 days and aggregates up to 16.77" (426mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Saint Johns.On the first day of December, sunrise is at 7:50 am and sunset at 5:04 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 5:13 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
How cold is it in Saint Johns in December?
What is the average humidity in December in Saint Johns?
How much does it rain in Saint Johns in December?
How much does it snow in Saint Johns in December?
What is the month with the shortest days in Saint Johns?
How many hours of daylight does Saint Johns have in December?
When is the sunrise / sunset in December in Saint Johns?
How long on average sun shines in December in Saint Johns?
When is the lowest UV index in Saint Johns?
What is the UV index reading in December in Saint Johns?
Average temperature in December
Saint Johns, MI
- Average high temperature in December: 33.3°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 (27°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
Saint Johns, MI
- Average pressure in December: 30.07"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 Johns, MI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Saint Johns, MI
- Average humidity in December: 84%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Saint Johns, MI
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in December
Saint Johns, MI
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (5 days).
Average snowfall in December
Saint Johns, MI
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Saint Johns, MI
- Average snowfall days in December: 14 days
The month with the highest number of snowfall days is January (17.3 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 Johns, MI
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Saint Johns, MI
- Average sunshine days in December: 12 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is February (9.2 days).
Average UV index in December
Saint Johns, 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 and December (UV index 1).
Average cloud cover in December
Saint Johns, MI
- Average cloud cover in December: 68
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Saint Johns, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).
Saint Johns, Michigan, USA
Weather forecast for your location
2. Allow the app to use your location
