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
As December commences, the average high-temperature shows a reduction, transitioning from a cold 42.4°F (5.8°C) in November to a freezing cold 28.4°F (-2°C). During December, the temperature tends to dip to an average of 18.3°F (-7.6°C) at night.Humidity
The average relative humidity in December is 85%.Rainfall
In Reilly Settlement, in December, it is raining for 3.5 days, with typically 0.43" (11mm) of accumulated precipitation. Throughout the year, there are 98 rainfall days, and 9.8" (249mm) of precipitation is accumulated.Snowfall
Months with snowfall in Reilly Settlement are January through May, October through December. In Reilly Settlement, during December, snow falls for 9 days and regularly aggregates up to 0.91" (23mm) of snow. Throughout the year, in Reilly Settlement, there are 36.8 snowfall days, and 6.22" (158mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Reilly Settlement.On the first day of December, sunrise is at 7:21 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:43 pm CST.
Sunshine
In December, the average sunshine is 4.1h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 1 during December leads to these advisories:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Reilly Settlement in December?
What is the average humidity in December in Reilly Settlement?
How many days does it rain in December in Reilly Settlement?
How many days does it snow in December in Reilly Settlement?
What is the month with the shortest days in Reilly Settlement?
What is the average length of the day in December in Reilly Settlement?
When is the sunrise / sunset in December in Reilly Settlement?
How long on average sun shines in December in Reilly Settlement?
When is the lowest UV index in Reilly Settlement?
What is the UV index reading in December in Reilly Settlement?
Average temperature in December
Reilly Settlement, IA
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Reilly Settlement, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Reilly Settlement, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).
Average humidity in December
Reilly Settlement, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Reilly Settlement, IA
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in December
Reilly Settlement, IA
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is June (14.5 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
Reilly Settlement, IA
- Average snowfall in December: 0.91"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Reilly Settlement, IA
- Average snowfall days in December: 9 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Reilly Settlement, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Reilly Settlement, IA
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (22 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in December
Reilly Settlement, IA
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Reilly Settlement, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Reilly Settlement, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Reilly Settlement, Iowa, USA
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