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
Welcoming December, Saint Johnsbury observes a shift in the average high-temperature, falling from November's wintry 39.7°F (4.3°C) to a freezing cold 28.6°F (-1.9°C). The month of December records an average low-temperature of 18.1°F (-7.7°C).Humidity
The average relative humidity in December is 85%.Rainfall
In Saint Johnsbury, in December, it is raining for 10.4 days, with typically 2.36" (60mm) of accumulated precipitation. In Saint Johnsbury, during the entire year, the rain falls for 157.2 days and collects up to 28.35" (720mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, in Saint Johnsbury, Vermont, it is snowing for 19.1 days. Throughout December, 7.52" (191mm) of snow is accumulated. In Saint Johnsbury, during the entire year, snow falls for 98.4 days and aggregates up to 51.97" (1320mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 4:09 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:18 pm EST.
Sunshine
In December, the average sunshine is 3.3h.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 of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 1 in December leads to these guidelines:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice 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 many days does it rain in December in Saint Johnsbury?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Saint Johnsbury have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Saint Johnsbury have in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Saint Johnsbury, VT
- Average high temperature in December: 28.6°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (54.5°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in December
Saint Johnsbury, VT
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Saint Johnsbury, VT
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Saint Johnsbury, VT
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (76%).
Average rainfall in December
Saint Johnsbury, VT
- Average rainfall in December: 2.36"
The wettest months (with the highest rainfall) are June and October (2.87").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Saint Johnsbury, VT
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in December
Saint Johnsbury, VT
- Average snowfall in December: 7.52"
The month with the highest snowfall is January (12.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint Johnsbury, VT
- Average snowfall days in December: 19.1 days
The month with the highest number of snowfall days is February (20.8 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 Johnsbury, VT
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in December
Saint Johnsbury, VT
- Average sunshine days in December: 8.4 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (6.6 days).
Average UV index in December
Saint Johnsbury, VT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Saint Johnsbury, VT
- Average cloud cover in December: 68
The month with the most cloud cover is February (Cloud cover 73).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility in December
Saint Johnsbury, VT
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March and December (4mi).
Saint Johnsbury, Vermont, USA
Weather forecast for your location
2. Allow the app to use your location