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
Setting in of December comes with a decrease in the average high-temperature, moving from a fresh 51.6°F (10.9°C) in November to a cold 40.5°F (4.7°C). Pleasant Hill records a consistent low-temperature of 28.2°F (-2.1°C) during December nights.Humidity
The average relative humidity in December is 77%.Rainfall
In Pleasant Hill, in December, it is raining for 7.6 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, in Pleasant Hill, there are 142.7 rainfall days, and 27.64" (702mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 4.5 days. Throughout December, 1.38" (35mm) of snow is accumulated. In Pleasant Hill, during the entire year, snow falls for 26.1 days and aggregates up to 9.45" (240mm) of snow.Daylight
December has the shortest days of the year in Pleasant Hill, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:05 am and sunset at 4:40 pm. On the last day of December, in Pleasant Hill, sunrise is at 7:23 am and sunset at 4:50 pm CST.
Sunshine
In December, the average sunshine in Pleasant Hill is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Pleasant Hill. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
How cold does it get in Pleasant Hill in December?
What is the average humidity in December in Pleasant Hill?
How much does it rain in Pleasant Hill in December?
How much does it snow in Pleasant Hill in December?
What is the month with the shortest days in Pleasant Hill?
How many hours of daylight does Pleasant Hill have in December?
When is the sunrise / sunset in December in Pleasant Hill?
How many hours of sunshine does Pleasant Hill have in December?
When is the lowest UV index in Pleasant Hill?
What is the UV index reading in December in Pleasant Hill?
Average temperature in December
Pleasant Hill, IL
- Average high temperature in December: 40.5°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in December
Pleasant Hill, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Pleasant Hill, IL
- Average wind speed in December: 9.3mph
The windiest months (with the highest average wind speed) are January and February (9.7mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Pleasant Hill, IL
- Average humidity in December: 77%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Pleasant Hill, IL
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in December
Pleasant Hill, IL
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (17.3 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in December
Pleasant Hill, IL
- Average snowfall in December: 1.38"
The month with the highest snowfall is January (3.03").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Pleasant Hill, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (8.5 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
Pleasant Hill, IL
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 4h and 30min).
Average sunshine days in December
Pleasant Hill, IL
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Pleasant Hill, 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
Pleasant Hill, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility in December
Pleasant Hill, 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).
Pleasant Hill, Illinois, USA
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