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 decrease in the average high-temperature is observed during December, shifting from a frosty 43.5°F (6.4°C) in November to a cold 32.5°F (0.3°C). In Johnstown, in December, the average low-temperature is a subzero cold 22.8°F (-5.1°C).Humidity
In Johnstown, the average relative humidity in December is 83%.Rainfall
In Johnstown, in December, during 12.2 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, there are 165.5 rainfall days, and 33.74" (857mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Johnstown, in December, snow falls for 13.8 days, with typically accumulated 7.95" (202mm) of snow. Throughout the year, there are 72.7 snowfall days, and 43.46" (1104mm) of snow is accumulated.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 7:09 am and sunset at 4:23 pm. On the last day of December, in Johnstown, sunrise is at 7:28 am and sunset at 4:32 pm EST.
Sunshine
The average sunshine in December is 3.8h.UV index
The months with the lowest UV index in Johnstown are January, February and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 1 suggests these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice 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 many days does it rain in December 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 many hours of sunshine does Johnstown have in December?
When is the lowest UV index in Johnstown?
How high is the UV index in December in Johnstown?
Average temperature in December
Johnstown, NY
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in December
Johnstown, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Johnstown, NY
- Average wind speed in December: 8mph
The windiest months (with the highest average wind speed) are January and February (8.5mph).
The calmest months (with the lowest average wind speed) are August and September (5.7mph).
Average humidity in December
Johnstown, NY
- Average humidity in December: 83%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in December
Johnstown, NY
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Johnstown, NY
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (8.9 days).
Average snowfall in December
Johnstown, NY
- Average snowfall in December: 7.95"
The month with the highest snowfall is February (11.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Johnstown, NY
- Average snowfall days in December: 13.8 days
The month with the highest number of snowfall days is January (17.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Johnstown, NY
- 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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in December
Johnstown, NY
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in December
Johnstown, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Johnstown, NY
- Average cloud cover in December: 59
The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Johnstown, NY
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The month with the lowest visibility is February (4mi).
Johnstown, New York, USA
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