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 Ruma, the beginning of December is marked by a lowered average high-temperature, shifting from November's cool 53.8°F (12.1°C) to a chilly 43.5°F (6.4°C). Ruma observes an average low-temperature of 31.1°F (-0.5°C) during December nights.Humidity
The average relative humidity in December in Ruma is 76%.Rainfall
In Ruma, during December, the rain falls for 7.6 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 138.9 rainfall days, and 26.81" (681mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Ruma, in December, snow falls for 2.8 days, with typically accumulated 1.18" (30mm) of snow. Throughout the year, there are 16.7 snowfall days, and 6.38" (162mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:16 am and sunset at 4:50 pm CST.
Sunshine
In December, the average sunshine in Ruma is 5h.UV index
The months with the lowest UV index in Ruma are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, a regular UV index of 2 translates into these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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 many days does it snow in December in Ruma?
What is the month with the shortest days?
How many hours of daylight does Ruma have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December in Ruma?
Average temperature in December
Ruma, IL
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in December
Ruma, 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
Ruma, IL
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Ruma, IL
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Ruma, IL
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in December
Ruma, IL
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in December
Ruma, IL
- Average snowfall in December: 1.18"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Ruma, IL
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Ruma, IL
- Average daylight in December: 9h and 4min
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 36min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Ruma, IL
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in December
Ruma, 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 and December (UV index 2).
Average cloud cover in December
Ruma, IL
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in December
Ruma, 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).
Ruma, Illinois, USA
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