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
A change in temperatures is noted as November gives way to December, with average highs reducing from a chilly 49.6°F (9.8°C) to a cold 38.5°F (3.6°C). During December, Garrett records a consistent average nighttime temperature of 28.2°F (-2.1°C).Humidity
In December, the average relative humidity is 79%.Rainfall
In Garrett, Illinois, in December, it is raining for 8.5 days, with typically 1.3" (33mm) of accumulated precipitation. Throughout the year, in Garrett, there are 144.2 rainfall days, and 22.4" (569mm) of precipitation is accumulated.Snowfall
Months with snowfall in Garrett are January through April, November and December. In Garrett, during December, snow falls for 5.5 days and regularly aggregates up to 1.5" (38mm) of snow. In Garrett, during the entire year, snow falls for 25.8 days and aggregates up to 6.38" (162mm) of snow.Daylight
The month with the shortest days in Garrett is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:29 pm. On the last day of December, in Garrett, sunrise is at 7:14 am and sunset at 4:39 pm CST.
Sunshine
In Garrett, Illinois, the average sunshine in December is 4.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Garrett. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: In December, a daily UV index of 2 turns into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Stay sun-safe with clothing that is both closely woven and worn loosely. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Garrett during December?
What is the average humidity in December in Garrett?
How much does it rain in Garrett in December?
How many days does it snow in December in Garrett?
What is the month with the shortest days in Garrett?
How many hours of daylight does Garrett have in December?
When is the sunrise / sunset in December in Garrett?
How long on average sun shines in December in Garrett?
What is the month with the lowest UV index in Garrett?
How high is the UV index in December in Garrett?
Average temperature in December
Garrett, IL
- Average high temperature in December: 38.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Garrett, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Garrett, IL
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Garrett, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Garrett, IL
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is April (2.72").
The driest months (with the least rainfall) are February and September (1.26").
Average rainfall days in December
Garrett, IL
- Average rainfall days in December: 8.5 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Garrett, IL
- Average snowfall in December: 1.5"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Garrett, IL
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (8.2 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
Garrett, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Garrett, IL
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Garrett, IL
- Average UV index in December: 2
The months with the highest UV index are 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
Garrett, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Garrett, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Garrett, Illinois, USA
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