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
The onset of December results in a decrease in the average high-temperature, receding from a frosty 47.7°F (8.7°C) in November to a wintry 36.7°F (2.6°C). Smithson registers a consistent average low-temperature of 26.4°F (-3.1°C) during December.Humidity
In Smithson, Indiana, the average relative humidity in December is 82%.Rainfall
In Smithson, in December, it is raining for 9.5 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Smithson, there are 157.1 rainfall days, and 23.11" (587mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Smithson, Indiana. In Smithson, during December, snow falls for 8.8 days and regularly aggregates up to 1.85" (47mm) of snow. Throughout the year, there are 42 snowfall days, and 10.16" (258mm) 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 in Smithson, sunrise is at 7:52 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 5:30 pm EST.
Sunshine
In Smithson, the average sunshine in December is 4.2h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 1 in December translates into these instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Smithson?
What is the average humidity in December in Smithson?
How much does it rain in Smithson in December?
How many days does it snow in December in Smithson?
What is the month with the shortest days in Smithson?
What is the average length of the day in December in Smithson?
When is the sunrise / sunset in December in Smithson?
How many hours of sunshine does Smithson have in December?
When is the lowest UV index in Smithson?
What is the UV index intensity in December in Smithson?
Average temperature in December
Smithson, IN
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Smithson, IN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Smithson, IN
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Smithson, IN
- Average humidity in December: 82%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Smithson, IN
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.14").
Average rainfall days in December
Smithson, IN
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in December
Smithson, IN
- Average snowfall in December: 1.85"
The month with the highest snowfall is January (2.95").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Smithson, IN
- Average snowfall days in December: 8.8 days
The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Smithson, IN
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 1min
The months with the most sunshine are June and July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Smithson, IN
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (9.4 days).
Average UV index in December
Smithson, IN
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Smithson, IN
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Smithson, IN
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Smithson, Indiana, USA
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