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
December suggests a modest reduction in the average high-temperature, shifting from a frosty 47.7°F (8.7°C) in November to a wintry 37.8°F (3.2°C). During December, Johnson witnesses a consistent average low-temperature of 25.9°F (-3.4°C).Humidity
December is the most humid month, with an average relative humidity of 83%.Rainfall
In Johnson, in December, during 10.5 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 153.7 rainfall days, and 30.75" (781mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Johnson, in December, during 6.3 snowfall days, 3.78" (96mm) of snow is typically accumulated. In Johnson, during the entire year, snow falls for 32.5 days and aggregates up to 19.13" (486mm) of snow.Daylight
December has the shortest days of the year in Johnson, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:05 am and sunset at 4:29 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:38 pm EST.
Sunshine
In December, the average sunshine is 4.5h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, the UV index of 2 transforms into the following advice:
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. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the most humid month?
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?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Johnson, NY
- Average high temperature in December: 37.8°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Johnson, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Johnson, NY
- Average wind speed in December: 6.8mph
The windiest months (with the highest average wind speed) are January, February and March (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Johnson, NY
- Average humidity in December: 83%
The month with the highest relative humidity is December (83%).
The months with the lowest relative humidity are April and July (77%).
Average rainfall in December
Johnson, NY
- Average rainfall in December: 2.8"
The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Johnson, NY
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Johnson, NY
- Average snowfall in December: 3.78"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Johnson, NY
- Average snowfall days in December: 6.3 days
The month with the highest number of snowfall days is February (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Johnson, NY
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Johnson, NY
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (11 days).
Average UV index in December
Johnson, NY
- Average UV index in December: 2
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, March, November and December (UV index 2).
Average cloud cover in December
Johnson, NY
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Johnson, NY
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Johnson, New York, USA
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