December weather forecastGraysville, IN
December
Weather in December
The first month of the winter, December, is also a wintry month in Graysville, Indiana, with an average temperature fluctuating between 40.8°F (4.9°C) and 29.5°F (-1.4°C).Temperature
A subtle decrease in the average high-temperature marks December, falling from November's fresh 51.3°F (10.7°C) to a wintry 40.8°F (4.9°C). December is noted for a mean low-temperature of 29.5°F (-1.4°C).Humidity
In Graysville, the average relative humidity in December is 80%.Rainfall
In Graysville, in December, it is raining for 9.4 days, with typically 2.24" (57mm) of accumulated precipitation. Throughout the year, in Graysville, there are 150.1 rainfall days, and 28.5" (724mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Graysville, Indiana. In December, it is snowing for 5.2 days. Throughout December, 1.57" (40mm) of snow is accumulated. Throughout the year, there are 23.8 snowfall days, and 6.89" (175mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:51 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 5:37 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 4.4h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Graysville, IN
- Average high temperature in December: 40.8°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in December: 29.5°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Graysville, IN
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Graysville, IN
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Graysville, IN
- Average humidity in December: 80%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Graysville, IN
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is April (4.06").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in December
Graysville, IN
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in December
Graysville, IN
- Average snowfall in December: 1.57"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Graysville, IN
- Average snowfall days in December: 5.2 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Graysville, IN
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days in December
Graysville, IN
- Average sunshine days in December: 16.9 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in December
Graysville, IN
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Graysville, IN
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Graysville, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
