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
As December arrives, Johnstown's weather displays a notable decrease in high-temperatures, falling from November's frosty 46.2°F (7.9°C) to a freezing cold 31.6°F (-0.2°C). Johnstown records a mean low-temperature of 20.7°F (-6.3°C) in December.Humidity
In Johnstown, Nebraska, 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. In Johnstown, during the entire year, the rain falls for 103.2 days and collects up to 17.44" (443mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. 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
With an average of 9h and 6min of daylight, December has the shortest days of the year in Johnstown.On the first day of the month, sunrise is at 7:51 am and sunset at 5:07 pm. On the last day of December, sunrise is at 8:09 am and sunset at 5:17 pm CST.
Sunshine
In December, the average sunshine in Johnstown, Nebraska, is 5.4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Johnstown. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Minimize direct exposure to the Sun during midday when its radiation is at its peak. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
How cold is it in Johnstown in December?
What is the average humidity in December in Johnstown?
How much does it rain in Johnstown in December?
When does it snow the most in Johnstown?
How much does it snow in Johnstown in December?
What is the month with the shortest days in Johnstown?
What is the average length of the day in December in Johnstown?
When is the sunrise / sunset in December in Johnstown?
How long on average sun shines in December in Johnstown?
When is the lowest UV index in Johnstown?
What is the UV index intensity 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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