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
With December's arrival, Swisher sees a decrease in average high-temperatures, moving from a frosty 45.5°F (7.5°C) in November to a wintry 33.1°F (0.6°C). Throughout December nights, Swisher registers an average low-temperature of 22.5°F (-5.3°C).Humidity
The average relative humidity in December is 81%.Rainfall
In Swisher, in December, during 5.9 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. In Swisher, during the entire year, the rain falls for 120.7 days and collects up to 18.31" (465mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Swisher, during December, snow falls for 8.2 days and regularly aggregates up to 1.46" (37mm) of snow. In Swisher, during the entire year, snow falls for 36.1 days and aggregates up to 8.43" (214mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:15 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:46 pm CST.
Sunshine
In Swisher, the average sunshine in December is 4.4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Swisher have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Swisher have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Swisher, IA
- Average high temperature in December: 33.1°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in December: 22.5°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 (14.2°F).
Average pressure in December
Swisher, 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
Swisher, IA
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in December
Swisher, IA
- Average humidity in December: 81%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Swisher, IA
- Average rainfall in December: 0.79"
The wettest month (with the highest rainfall) is May (3.07").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in December
Swisher, IA
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Swisher, IA
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Swisher, IA
- Average snowfall days in December: 8.2 days
The month with the highest number of snowfall days is January (10.3 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
Swisher, 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 12min).
- 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: 4h and 6min).
Average sunshine days in December
Swisher, IA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Swisher, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Swisher, IA
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Swisher, 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).
Swisher, Iowa, USA
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