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 transition into December indicates a reduction in the average high-temperature, down to an icy 36.3°F (2.4°C) from November's fresh 50.2°F (10.1°C). Throughout December, Rockville records an average temperature of 21.9°F (-5.6°C) at night.Humidity
In Rockville, the average relative humidity in December is 73%.Rainfall
In December, in Rockville, the rain falls for 2.7 days. Throughout December, 1.26" (32mm) of precipitation is accumulated. Throughout the year, there are 102.7 rainfall days, and 18.15" (461mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rockville are January through April, October through December. The month with the most snowfall is December, when snow falls for 5.1 days and typically aggregates up to 2.91" (74mm) of snow.Daylight
The month with the shortest days in Rockville, Nebraska, is December, with an average of 9h and 18min of daylight.On the first day of December in Rockville, Nebraska, sunrise is at 7:41 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 5:16 pm CST.
Sunshine
In December, the average sunshine is 5.7h.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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 2 in December leads to these recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Rockville in December?
What is the average humidity in December in Rockville?
How many days does it rain in December in Rockville?
When does it snow the most in Rockville?
How much does it snow in Rockville in December?
What is the month with the shortest days in Rockville?
How many hours of daylight does Rockville have in December?
What time are sunrise and sunset in December in Rockville?
How long on average sun shines in December in Rockville?
When is the lowest UV index in Rockville?
How high is the UV index in December in Rockville?
Average temperature in December
Rockville, NE
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in December: 21.9°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Rockville, NE
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Rockville, NE
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in December
Rockville, NE
- Average humidity in December: 73%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (60%).
Average rainfall in December
Rockville, NE
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Rockville, NE
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is December (2.7 days).
Average snowfall in December
Rockville, NE
- Average snowfall in December: 2.91"
The month with the highest snowfall is December (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Rockville, NE
- Average snowfall days in December: 5.1 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rockville, NE
- 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: 5h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in December
Rockville, NE
- Average sunshine days in December: 23.6 days
The month with the most sunshine days is November (23.7 days).
The month with the least sunshine days is May (14.9 days).
Average UV index in December
Rockville, NE
- Average UV index in December: 2
The months with the highest UV index are 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
Rockville, NE
- Average cloud cover in December: 39
The months with the most cloud cover are January, February and March (Cloud cover 41).
The months with the least cloud cover are July and September (Cloud cover 25).
Average visibility in December
Rockville, NE
- 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).
Rockville, Nebraska, USA
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