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
December involves a decrease in temperature, down from a chilly 44.8°F (7.1°C) in November to a wintry 32.2°F (0.1°C). Troy Mills, during the nights of December, experiences an average temperature drop to a subzero cold 21.7°F (-5.7°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In Troy Mills, in December, during 6.7 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Troy Mills, Iowa, during the entire year, the rain falls for 138.6 days and collects up to 27.8" (706mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Troy Mills, during December, snow falls for 9.1 days and regularly aggregates up to 2.8" (71mm) of snow. In Troy Mills, Iowa, during the entire year, snow falls for 41.2 days and aggregates up to 16.73" (425mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 4:35 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:44 pm CST.
Sunshine
The average sunshine in December is 4.3h.UV index
The month with the lowest UV index in Troy Mills is December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Troy Mills in December?
What is the average humidity in December in Troy Mills?
How much does it rain in Troy Mills in December?
How much does it snow in Troy Mills in December?
What is the month with the shortest days in Troy Mills?
How many hours of daylight does Troy Mills have in December?
What time are sunrise and sunset in December in Troy Mills?
How long on average sun shines in December in Troy Mills?
What is the month with the lowest UV index in Troy Mills?
What is the UV index reading in December in Troy Mills?
Average temperature in December
Troy Mills, IA
- Average high temperature in December: 32.2°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in December: 21.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in December
Troy Mills, 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
Troy Mills, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in December
Troy Mills, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Troy Mills, IA
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is May (4.37").
The driest months (with the least rainfall) are January and February (1.18").
Average rainfall days in December
Troy Mills, IA
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in December
Troy Mills, IA
- Average snowfall in December: 2.8"
The month with the highest snowfall is January (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Troy Mills, IA
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Troy Mills, IA
- 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 6min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Troy Mills, IA
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is June (9.9 days).
Average UV index in December
Troy Mills, IA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Troy Mills, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Troy Mills, 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).
Troy Mills, Iowa, USA
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