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 Prophetstown, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 46°F (7.8°C) to an icy 34.2°F (1.2°C). Prophetstown experiences an average nighttime temperature of 23.5°F (-4.7°C) in the month of December.Humidity
The average relative humidity in December in Prophetstown, Illinois, is 82%.Rainfall
In Prophetstown, Illinois, in December, it is raining for 7.5 days, with typically 1.57" (40mm) of accumulated precipitation. In Prophetstown, during the entire year, the rain falls for 151.5 days and collects up to 30.24" (768mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 7.8 days. Throughout December, 2.76" (70mm) of snow is accumulated. Throughout the year, there are 37.9 snowfall days, and 15.83" (402mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December in Prophetstown, sunrise is at 7:07 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:39 pm CST.
Sunshine
In December, the average sunshine in Prophetstown is 4.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Prophetstown, Illinois. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In December, a regular UV index of 1 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold is it in Prophetstown in December?
What is the average humidity in December in Prophetstown?
How many days does it rain in December in Prophetstown?
How many days does it snow in December in Prophetstown?
What is the month with the shortest days in Prophetstown?
What is the average length of the day in December in Prophetstown?
When is the sunrise / sunset in December in Prophetstown?
How long on average sun shines in December in Prophetstown?
When is the lowest UV index in Prophetstown?
What is the UV index intensity in December in Prophetstown?
Average temperature in December
Prophetstown, IL
- Average high temperature in December: 34.2°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in December: 23.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in December
Prophetstown, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Prophetstown, IL
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Prophetstown, IL
- Average humidity in December: 82%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Prophetstown, IL
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in December
Prophetstown, IL
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in December
Prophetstown, IL
- Average snowfall in December: 2.76"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Prophetstown, IL
- Average snowfall days in December: 7.8 days
The month with the highest number of snowfall days is January (10.5 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
Prophetstown, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Prophetstown, IL
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in December
Prophetstown, IL
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Prophetstown, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in December
Prophetstown, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Prophetstown, Illinois, USA
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