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
The shift to December brings a decrease in the average high-temperature, falling from a chilly 48°F (8.9°C) in November to a cold 36.9°F (2.7°C). Nighttime temperatures consistently average a freezing cold 26.6°F (-3°C) during December.Humidity
The average relative humidity in December in Arrowsmith is 80%.Rainfall
The month with the least rainfall in Arrowsmith is December, when the rain falls for 7.5 days and typically collects 1.1" (28mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Arrowsmith, during December, snow falls for 5.9 days and regularly aggregates up to 1.42" (36mm) of snow. In Arrowsmith, Illinois, during the entire year, snow falls for 28.1 days and aggregates up to 9.17" (233mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Arrowsmith.On the first day of the month, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of December, in Arrowsmith, sunrise is at 7:17 am and sunset at 4:38 pm CST.
Sunshine
The average sunshine in December is 4.4h.UV index
The months with the lowest UV index in Arrowsmith are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
How cold is it in Arrowsmith in December?
What is the average humidity in December in Arrowsmith?
What is the driest month in Arrowsmith?
How many days does it rain in December in Arrowsmith?
How many days does it snow in December in Arrowsmith?
What is the month with the shortest days in Arrowsmith?
What is the average length of the day in December in Arrowsmith?
What time are sunrise and sunset in December in Arrowsmith?
How many hours of sunshine does Arrowsmith have in December?
When is the lowest UV index in Arrowsmith?
What is the UV index intensity in December in Arrowsmith?
Average temperature in December
Arrowsmith, IL
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in December
Arrowsmith, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Arrowsmith, IL
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Arrowsmith, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Arrowsmith, IL
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in December
Arrowsmith, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Arrowsmith, IL
- Average snowfall in December: 1.42"
The month with the highest snowfall is January (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Arrowsmith, IL
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (9.8 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
Arrowsmith, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Arrowsmith, IL
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in December
Arrowsmith, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Arrowsmith, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Arrowsmith, 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).
Arrowsmith, Illinois, USA
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