December weather forecastRocklane, IN
December
Weather in December
The first month of the winter, December, is also a wintry month in Rocklane, Indiana, with an average temperature fluctuating between 39.2°F (4°C) and 28.6°F (-1.9°C).Temperature
As November transitions to December, the average high-temperature falls from a frosty 49.5°F (9.7°C) to a cold 39.2°F (4°C). Rocklane reports an average nighttime low-temperature of 28.6°F (-1.9°C) in December.Humidity
With an average relative humidity of 82%, December is the most humid month in Rocklane.Rainfall
In Rocklane, Indiana, in December, during 10.7 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Rocklane, during the entire year, the rain falls for 161.8 days and collects up to 30.55" (776mm) of precipitation.Snowfall
Months with snowfall in Rocklane are January through April, October through December. In Rocklane, Indiana, during December, snow falls for 8.4 days and regularly aggregates up to 2.6" (66mm) of snow. In Rocklane, during the entire year, snow falls for 36.4 days and aggregates up to 10.94" (278mm) of snow.Daylight
December has the shortest days of the year in Rocklane, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:46 am and sunset at 5:20 pm. On the last day of December, sunrise is at 8:04 am and sunset at 5:30 pm EST.
Sunshine
In December, the average sunshine in Rocklane is 4.3h.UV index
The months with the lowest UV index in Rocklane are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rocklane, IN
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in December
Rocklane, IN
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Rocklane, IN
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Rocklane, IN
- Average humidity in December: 82%
The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Rocklane, IN
- Average rainfall in December: 2.17"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is February (1.81").
Average rainfall days in December
Rocklane, IN
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in December
Rocklane, IN
- Average snowfall in December: 2.6"
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
Rocklane, IN
- Average snowfall days in December: 8.4 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rocklane, IN
- Average daylight in December: 9h and 24min
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 24min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Rocklane, IN
- Average sunshine days in December: 14.1 days
The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is May (9.5 days).
Average UV index in December
Rocklane, IN
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Rocklane, IN
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Rocklane, 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).
