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
Arrival of December comes with a reduction in the average high-temperature, falling from a wintry 42.4°F (5.8°C) in November to a subzero cold 28.4°F (-2°C). Ionia experiences an average low-temperature reading of 18.3°F (-7.6°C) throughout December.Humidity
In Ionia, the average relative humidity in December is 85%.Rainfall
In Ionia, in December, it is raining for 3.5 days, with typically 0.43" (11mm) of accumulated precipitation. In Ionia, Iowa, during the entire year, the rain falls for 98 days and collects up to 9.8" (249mm) of precipitation.Snowfall
Months with snowfall in Ionia, Iowa, are January through May, October through December. In December, in Ionia, it is snowing for 9 days. Throughout December, 0.91" (23mm) of snow is accumulated. In Ionia, during the entire year, snow falls for 36.8 days and aggregates up to 6.22" (158mm) of snow.Daylight
The month with the shortest days in Ionia is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 4:36 pm. On the last day of December, in Ionia, sunrise is at 7:41 am and sunset at 4:45 pm CST.
Sunshine
In Ionia, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index in Ionia are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 transforms into these recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Ionia in December?
What is the average humidity in December in Ionia?
How many days does it rain in December in Ionia?
How many days does it snow in December in Ionia?
What is the month with the shortest days in Ionia?
What is the average length of the day in December in Ionia?
When is the sunrise / sunset in December in Ionia?
How many hours of sunshine does Ionia have in December?
When is the lowest UV index in Ionia?
How high is the UV index in December in Ionia?
Average temperature in December
Ionia, IA
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Ionia, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Ionia, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).
Average humidity in December
Ionia, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Ionia, IA
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in December
Ionia, IA
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (14.5 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
Ionia, IA
- Average snowfall in December: 0.91"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Ionia, IA
- Average snowfall days in December: 9 days
The month with the highest number of snowfall days is January (9.1 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, IA
- 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: 4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Ionia, IA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (22 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in December
Ionia, IA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Ionia, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Ionia, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Ionia, Iowa, USA
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