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
As December arrives, Grand Rapids's weather displays a decrease in high-temperatures, transitioning from November's chilly 45°F (7.2°C) to an icy 33.8°F (1°C). Grand Rapids records a mild decrease in temperature during the nights of December, averaging 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, during December, the rain falls for 5.6 days and regularly aggregates up to 0.55" (14mm) of 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 in Grand Rapids, Michigan, are January through April, November and December. In Grand Rapids, during December, snow falls for 8.5 days and regularly aggregates up to 0.87" (22mm) of snow. In Grand Rapids, Michigan, during the entire year, snow falls for 44.5 days and aggregates up to 5.51" (140mm) of snow.Daylight
December has the shortest days of the year in Grand Rapids, with an average of 9h and 6min of daylight.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, in Grand Rapids, sunrise is at 8:13 am and sunset at 5:18 pm EST.
Sunshine
In December, the average sunshine in Grand Rapids is 2.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 1 during December translates into the following guidance:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Frequently asked questions
How cold is December in Grand Rapids?
What is the average humidity in December in Grand Rapids?
How many days does it rain in December in Grand Rapids?
How much does it snow in Grand Rapids in December?
What is the month with the shortest days in Grand Rapids?
What is the average length of the day in December in Grand Rapids?
When are sunrise and sunset in December in Grand Rapids?
How long on average sun shines in December in Grand Rapids?
What is the month with the lowest UV index in Grand Rapids?
How high is the UV index 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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