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 the transition to December, Harvel observes a drop in the average high-temperature, moving from a cool 51.3°F (10.7°C) in November to a cold 40.1°F (4.5°C). During December, Harvel records an average temperature of 28.8°F (-1.8°C) at night.Humidity
The average relative humidity in December in Harvel is 78%.Rainfall
In December, in Harvel, the rain falls for 7.6 days. Throughout December, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 145.5 rainfall days, and 27.44" (697mm) of precipitation is accumulated.Snowfall
Months with snowfall in Harvel, Illinois, are January through April, November and December. In Harvel, during December, snow falls for 5.3 days and regularly aggregates up to 1.85" (47mm) of snow. In Harvel, during the entire year, snow falls for 23.9 days and aggregates up to 8.58" (218mm) 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 6:59 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:45 pm CST.
Sunshine
The average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Harvel are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
Is it cold in Harvel during December?
What is the average humidity in December in Harvel?
How many days does it rain in December in Harvel?
How many days does it snow in December in Harvel?
What is the month with the shortest days in Harvel?
What is the average length of the day in December in Harvel?
What time are sunrise and sunset in December in Harvel?
How long on average sun shines in December in Harvel?
What are the months with the lowest UV index in Harvel?
What is the UV index reading in December in Harvel?
Average temperature in December
Harvel, IL
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Harvel, 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 (29.92"Hg).
Average wind speed in December
Harvel, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in December
Harvel, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Harvel, IL
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is June (3.5").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in December
Harvel, IL
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (7.4 days).
Average snowfall in December
Harvel, IL
- Average snowfall in December: 1.85"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Harvel, IL
- Average snowfall days in December: 5.3 days
The month with the highest number of snowfall days is January (7.4 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
Harvel, IL
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Harvel, IL
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Harvel, 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
Harvel, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July and September (Cloud cover 29).
Average visibility in December
Harvel, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Harvel, Illinois, USA
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