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 November transitions to December, the average high-temperature falls from a wintry 41.9°F (5.5°C) to a subzero cold 28.4°F (-2°C). Spillville encounters a steady low-temperature average of 18.3°F (-7.6°C) throughout the month of December.Humidity
In Spillville, the average relative humidity in December is 86%.Rainfall
In Spillville, Iowa, in December, during 6.4 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, in Spillville, there are 149 rainfall days, and 30.59" (777mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Spillville. In Spillville, in December, during 13.1 snowfall days, 4.57" (116mm) of snow is typically accumulated. Throughout the year, there are 60.9 snowfall days, and 24.37" (619mm) of snow is accumulated.Daylight
December has the shortest days of the year in Spillville, with an average of 9h and 0min of daylight.On the first day of December in Spillville, sunrise is at 7:20 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:42 pm CST.
Sunshine
In December, the average sunshine is 3.9h.UV index
The months with the lowest UV index in Spillville, Iowa, are January, February, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Spillville?
What is the average humidity in December in Spillville?
How many days does it rain in December in Spillville?
How much does it snow in Spillville in December?
What is the month with the shortest days in Spillville?
How many hours of daylight does Spillville have in December?
When is the sunrise / sunset in December in Spillville?
How many hours of sunshine does Spillville have in December?
When is the lowest UV index in Spillville?
What is the UV index intensity in December in Spillville?
Average temperature in December
Spillville, IA
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in December
Spillville, IA
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Spillville, IA
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Spillville, IA
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Spillville, IA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in December
Spillville, IA
- Average rainfall days in December: 6.4 days
The months with the highest number of rainy days are May and June (20.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in December
Spillville, IA
- Average snowfall in December: 4.57"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Spillville, IA
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Spillville, IA
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Spillville, IA
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.1 days).
Average UV index in December
Spillville, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Spillville, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Spillville, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Spillville, Iowa, USA
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