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 average high-temperature decreases in December, shifting from a chilly 43.5°F (6.4°C) in November to an icy 32.5°F (0.3°C). In the month of December, Johnstown's average low-temperature falls to a subzero cold 22.8°F (-5.1°C).Humidity
The average relative humidity in December is 83%.Rainfall
In December, in Johnstown, the rain falls for 12.2 days. Throughout December, 3.11" (79mm) of precipitation is accumulated. Throughout the year, in Johnstown, there are 165.5 rainfall days, and 33.74" (857mm) of precipitation is accumulated.Snowfall
Months with snowfall in Johnstown are January through May, October through December. In Johnstown, New York, in December, snow falls for 13.8 days, with typically accumulated 7.95" (202mm) of snow. In Johnstown, New York, during the entire year, snow falls for 72.7 days and aggregates up to 43.46" (1104mm) 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 the month, sunrise is at 7:09 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:32 pm EST.
Sunshine
In Johnstown, the average sunshine in December is 3.8h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Johnstown have in December?
When are sunrise and sunset in December in Johnstown?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index intensity in December?
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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