December weather forecastKoleen, IN
December
Weather in December
The first month of the winter, December, is also a wintry month in Koleen, Indiana, with an average temperature varying between 29.8°F (-1.2°C) and 41°F (5°C).Temperature
The move into December indicates a reduction in the average high-temperature, down from November's fresh 51.1°F (10.6°C) to an icy 41°F (5°C). Throughout the month of December, Koleen observes an average nighttime temperature of 29.8°F (-1.2°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In Koleen, during December, the rain falls for 9.9 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Koleen, during the entire year, the rain falls for 154.9 days and collects up to 27.24" (692mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Koleen. In Koleen, during December, snow falls for 6.3 days and regularly aggregates up to 1.54" (39mm) of snow. Throughout the year, there are 28.6 snowfall days, and 7.32" (186mm) of snow is accumulated.Daylight
The month with the shortest days in Koleen is December, with an average of 9h and 30min of daylight.On the first day of December in Koleen, sunrise is at 7:47 am and sunset at 5:25 pm. On the last day of the month, sunrise is at 8:05 am and sunset at 5:35 pm EST.
Sunshine
With an average of 4.2h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index in Koleen are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Koleen, IN
- Average high temperature in December: 41°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in December
Koleen, IN
- 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 (29.94"Hg).
Average wind speed in December
Koleen, IN
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Koleen, IN
- Average humidity in December: 81%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Koleen, IN
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is April (3.39").
The driest months (with the least rainfall) are September and October (1.69").
Average rainfall days in December
Koleen, IN
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Koleen, IN
- Average snowfall in December: 1.54"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Koleen, IN
- Average snowfall days in December: 6.3 days
The month with the highest number of snowfall days is January (8.8 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
Koleen, IN
- Average daylight in December: 9h and 30min
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 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in December
Koleen, IN
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10 days).
Average UV index in December
Koleen, IN
- 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, November and December (UV index 2).
Average cloud cover in December
Koleen, IN
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Koleen, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
