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's onset brings a slight change in high-temperatures, falling from a chilly 46.9°F (8.3°C) in November to a cold 36°F (2.2°C). December witnesses an average nighttime temperature of 26.2°F (-3.2°C).Humidity
In Swan, the average relative humidity in December is 84%.Rainfall
In Swan, in December, during 7.4 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 125.3 rainfall days, and 13.11" (333mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Swan, in December, snow falls for 7.1 days, with typically accumulated 0.67" (17mm) of snow. Throughout the year, in Swan, there are 32.5 snowfall days, and 5.75" (146mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:47 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 8:06 am and sunset at 5:21 pm EST.
Sunshine
In December, the average sunshine is 3.8h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
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 much 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 Swan have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Swan have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Swan, IN
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in December: 26.2°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Swan, IN
- Average pressure in December: 30.1"Hg
The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Swan, IN
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Swan, IN
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Swan, IN
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in December
Swan, IN
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Swan, IN
- Average snowfall in December: 0.67"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Swan, IN
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Swan, IN
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in December
Swan, IN
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is January (19.2 days).
The month with the least sunshine days is July (12 days).
Average UV index in December
Swan, IN
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Swan, IN
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Swan, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Swan, Indiana, USA
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