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
Alma in December demonstrates a small temperature transition, adjusting from an average high of a fresh 52.2°F (11.2°C) in November to a cold 41.9°F (5.5°C). December brings with it a nighttime average temperature of 30.6°F (-0.8°C).Humidity
In Alma, the average relative humidity in December is 78%.Rainfall
In Alma, in December, it is raining for 7.6 days, with typically 0.98" (25mm) of accumulated precipitation. In Alma, Illinois, during the entire year, the rain falls for 123.2 days and collects up to 15.08" (383mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 3.4 days. Throughout December, 0.47" (12mm) of snow is accumulated. In Alma, during the entire year, snow falls for 16.4 days and aggregates up to 2.05" (52mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 6:55 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:44 pm CST.
Sunshine
In December, the average sunshine is 4.8h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Alma have in December?
When is the sunrise / sunset in December in Alma?
How long on average sun shines in December in Alma?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Alma, IL
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 30.6°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Alma, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Alma, IL
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in December
Alma, IL
- Average humidity in December: 78%
The months with the highest relative humidity are May, July and August (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Alma, IL
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is April (2.01").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in December
Alma, IL
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in December
Alma, IL
- Average snowfall in December: 0.47"
The month with the highest snowfall is January (0.63").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Alma, IL
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is January (5.1 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
Alma, IL
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Alma, IL
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in December
Alma, IL
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Alma, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Alma, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Alma, Illinois, USA
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