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
In Grand Rapids, the average high-temperature in December decreases from a frosty 45°F (7.2°C) in November to an icy 33.8°F (1°C). During the month of December, Grand Rapids's average nighttime temperature closely mirrors its daytime counterpart, at a freezing cold 26.2°F (-3.2°C).Humidity
In Grand Rapids, the average relative humidity in December is 84%.Rainfall
In Grand Rapids, in December, it is raining for 5.6 days, with typically 0.55" (14mm) of accumulated precipitation. In Grand Rapids, during the entire year, the rain falls for 103.5 days and collects up to 9.02" (229mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Grand Rapids, in December, during 8.5 snowfall days, 0.87" (22mm) of snow is typically accumulated. Throughout the year, there are 44.5 snowfall days, and 5.51" (140mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:54 am and sunset at 5:09 pm. On the last day of December, sunrise is at 8:13 am and sunset at 5:18 pm EST.
Sunshine
In December, the average sunshine is 2.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Grand Rapids. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Grand Rapids have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December in Grand Rapids?
Average temperature in December
Grand Rapids, MI
- Average high temperature in December: 33.8°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 (27.7°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Grand Rapids, 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
Grand Rapids, MI
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
Grand Rapids, MI
- Average humidity in December: 84%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Grand Rapids, MI
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is May (1.14").
The driest month (with the least rainfall) is March (0.47").
Average rainfall days in December
Grand Rapids, MI
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is May (13 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Grand Rapids, MI
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Grand Rapids, MI
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (11.5 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
Grand Rapids, 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: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Grand Rapids, MI
- Average sunshine days in December: 19.4 days
The month with the most sunshine days is September (21 days).
The month with the least sunshine days is April (13.4 days).
Average UV index in December
Grand Rapids, MI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Grand Rapids, MI
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Grand Rapids, MI
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Grand Rapids, Michigan, USA
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