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
A clear reduction in the average high-temperature is witnessed with the onset of December, reducing from a chilly 46.2°F (7.9°C) in November to a freezing cold 31.6°F (-0.2°C). Johnstown experiences an average temperature drop to a still subzero cold 20.7°F (-6.3°C) during December nights.Humidity
The average relative humidity in December is 76%.Rainfall
In December, the rain falls for 2.3 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 103.2 rainfall days, and 17.44" (443mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. The month with the most snowfall is December, when snow falls for 7.1 days and typically aggregates up to 2.99" (76mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:51 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 5:17 pm CST.
Sunshine
In December, the average sunshine is 5.4h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 2 in December translates into this advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Johnstown?
What is the average humidity in December?
How much does it rain in December?
What is the snowiest month?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Johnstown have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December in Johnstown?
Average temperature in December
Johnstown, NE
- Average high temperature in December: 31.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 20.7°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 (18.9°F).
Average pressure in December
Johnstown, NE
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Johnstown, NE
- Average wind speed in December: 12.1mph
The windiest month (with the highest average wind speed) is April (13.3mph).
The calmest months (with the lowest average wind speed) are July and August (10.7mph).
Average humidity in December
Johnstown, NE
- Average humidity in December: 76%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is September (59%).
Average rainfall in December
Johnstown, NE
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Johnstown, NE
- Average rainfall days in December: 2.3 days
The month with the highest number of rainy days is May (14.8 days).
The months with the least rainy days are February and December (2.3 days).
Average snowfall in December
Johnstown, NE
- Average snowfall in December: 2.99"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Johnstown, NE
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Johnstown, NE
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in December
Johnstown, NE
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Johnstown, 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
Johnstown, NE
- Average cloud cover in December: 42
The months with the most cloud cover are January and February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Johnstown, 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).
Johnstown, Nebraska, USA
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