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 brings a minor decrease, with the average high-temperature reducing from a chilly 46.4°F (8°C) in November to an icy 34°F (1.1°C). During December, the temperature is averaged to a low of 23°F (-5°C) at night.Humidity
In Wilton, the average relative humidity in December is 81%.Rainfall
In December, in Wilton, the rain falls for 7.1 days. Throughout December, 1.26" (32mm) of precipitation is accumulated. Throughout the year, in Wilton, there are 136.1 rainfall days, and 27.8" (706mm) of precipitation is accumulated.Snowfall
Months with snowfall in Wilton are January through April, October through December. In Wilton, Iowa, during December, snow falls for 6.9 days and regularly aggregates up to 1.73" (44mm) of snow. Throughout the year, there are 34.4 snowfall days, and 13.19" (335mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Wilton.On the first day of December in Wilton, sunrise is at 7:11 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:44 pm CST.
Sunshine
In Wilton, the average sunshine in December is 4.3h.UV index
The months with the lowest UV index in Wilton are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 1 during December leads to these instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Wilton?
What is the average humidity in December in Wilton?
How much does it rain in Wilton in December?
How many days does it snow in December in Wilton?
What is the month with the shortest days in Wilton?
How many hours of daylight does Wilton have in December?
When are sunrise and sunset in December in Wilton?
How many hours of sunshine does Wilton have in December?
What is the month with the lowest UV index in Wilton?
How high is the UV index in December in Wilton?
Average temperature in December
Wilton, IA
- Average high temperature in December: 34°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in December: 23°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in December
Wilton, 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 (29.9"Hg).
Average wind speed in December
Wilton, IA
- Average wind speed in December: 9.9mph
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 (6.8mph).
Average humidity in December
Wilton, IA
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Wilton, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
Wilton, IA
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in December
Wilton, IA
- Average snowfall in December: 1.73"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Wilton, IA
- Average snowfall days in December: 6.9 days
The month with the highest number of snowfall days is January (11.2 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
Wilton, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Wilton, IA
- Average sunshine days in December: 18.2 days
The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Wilton, IA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Wilton, IA
- Average cloud cover in December: 54
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
Wilton, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Wilton, Iowa, USA
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