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
River Forest's weather in December involves a decrease in the average high-temperature, moving down from November's chilly 48.6°F (9.2°C) to a wintry 38.1°F (3.4°C). In the month of December, the temperature in River Forest generally rests at an average low of 27.5°F (-2.5°C).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 83%.Rainfall
In River Forest, in December, it is raining for 8.3 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, in River Forest, there are 142.1 rainfall days, and 20.91" (531mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. The months with the most snowfall in River Forest are February and December, with an average 2.17" (55mm) of accumulated snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:46 am and sunset at 5:17 pm. On the last day of December, in River Forest, sunrise is at 8:04 am and sunset at 5:27 pm EST.
Sunshine
The average sunshine in December in River Forest, Indiana, is 4.1h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
Is it cold in River Forest during December?
What are the most humid months in River Forest?
What is the average humidity in December in River Forest?
How many days does it rain in December in River Forest?
What is the snowiest month in River Forest?
How much does it snow in River Forest in December?
What is the month with the shortest days in River Forest?
How many hours of daylight does River Forest have in December?
When is the sunrise / sunset in December in River Forest?
How many hours of sunshine does River Forest have in December?
When is the lowest UV index in River Forest?
How high is the UV index in December in River Forest?
Average temperature in December
River Forest, IN
- Average high temperature in December: 38.1°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
River Forest, IN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
River Forest, IN
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in December
River Forest, IN
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
River Forest, IN
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (2.68").
The driest months (with the least rainfall) are February and November (1.14").
Average rainfall days in December
River Forest, IN
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in December
River Forest, IN
- Average snowfall in December: 2.17"
The months with the highest snowfall are February and December (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
River Forest, IN
- Average snowfall days in December: 7.7 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
River Forest, IN
- 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 24min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
River Forest, IN
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
River Forest, IN
- 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, October, November and December (UV index 2).
Average cloud cover in December
River Forest, IN
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are June, July and August (Cloud cover 32).
Average visibility in December
River Forest, IN
- 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).
River Forest, Indiana, USA
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