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 transition into December indicates a reduction in the average high-temperature, down to a wintry 32.9°F (0.5°C) from November's frosty 43.9°F (6.6°C). Saint Johnsville anticipates an average minimum temperature of 23.2°F (-4.9°C) in the month of December.Humidity
In Saint Johnsville, the average relative humidity in December is 84%.Rainfall
In Saint Johnsville, New York, in December, during 12.7 rainfall days, 2.99" (76mm) of precipitation is typically accumulated. In Saint Johnsville, during the entire year, the rain falls for 171 days and collects up to 34.25" (870mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 14 days. Throughout December, 6.93" (176mm) of snow is accumulated. Throughout the year, there are 71.4 snowfall days, and 33.58" (853mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:10 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:29 am and sunset at 4:34 pm EST.
Sunshine
In December, the average sunshine is 3.4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Saint Johnsville. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 1 during December leads to these advisories:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Saint Johnsville have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Saint Johnsville have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Saint Johnsville, NY
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in December
Saint Johnsville, 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
Saint Johnsville, NY
- Average wind speed in December: 8.6mph
The windiest months (with the highest average wind speed) are January and February (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Saint Johnsville, NY
- Average humidity in December: 84%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Saint Johnsville, NY
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Saint Johnsville, NY
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Saint Johnsville, NY
- Average snowfall in December: 6.93"
The month with the highest snowfall is February (9.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint Johnsville, NY
- Average snowfall days in December: 14 days
The month with the highest number of snowfall days is January (17.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Johnsville, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in December
Saint Johnsville, NY
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is February (6.3 days).
Average UV index in December
Saint Johnsville, 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 and December (UV index 1).
Average cloud cover in December
Saint Johnsville, NY
- Average cloud cover in December: 63
The month with the most cloud cover is February (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in December
Saint Johnsville, 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).
Saint Johnsville, New York, USA
Weather forecast for your location
2. Allow the app to use your location