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 Ionia, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 44.4°F (6.9°C) to a wintry 33.1°F (0.6°C). Consistently, Ionia reports average nighttime temperatures of 24.6°F (-4.1°C) during December, a marginal step down from its daytime highs.Humidity
In December, the average relative humidity is 85%.Rainfall
In Ionia, during December, the rain falls for 7.6 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 135.7 rainfall days, and 18.58" (472mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Ionia, Michigan. The month with the most snowfall is December, when snow falls for 15.1 days and typically aggregates up to 4.17" (106mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:52 am and sunset at 5:06 pm. On the last day of December, sunrise is at 8:11 am and sunset at 5:15 pm EST.
Sunshine
The average sunshine in December is 3h.UV index
January, November 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 health risk from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
What is the snowiest month?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Ionia have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Ionia, MI
- Average high temperature in December: 33.1°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 (27.1°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Ionia, 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
Ionia, MI
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in December
Ionia, 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
Ionia, MI
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (2.52").
The driest months (with the least rainfall) are February and November (1.06").
Average rainfall days in December
Ionia, MI
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in December
Ionia, MI
- Average snowfall in December: 4.17"
The month with the highest snowfall is December (4.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Ionia, MI
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Ionia, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Ionia, MI
- Average sunshine days in December: 10.9 days
The month with the most sunshine days is September (17.4 days).
The month with the least sunshine days is February (9.6 days).
Average UV index in December
Ionia, 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, November and December (UV index 1).
Average cloud cover in December
Ionia, MI
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Ionia, MI
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January, February, August and December (5mi).
Ionia, Michigan, USA
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