December weather forecastSaint John, ND
December
Weather in December
The first month of the winter, December, is also a subzero cold month in Saint John, North Dakota, with temperature in the range of an average high of 16.7°F (-8.5°C) and an average low of 5.9°F (-14.5°C).Temperature
As November transitions into December, Saint John sees a clear drop in the average high-temperature, declining from a wintry 32.2°F (0.1°C) to a subzero cold 16.7°F (-8.5°C). Throughout the December nights, Saint John encounters a low-temperature of 5.9°F (-14.5°C).Humidity
In December, the average relative humidity is 91%.Rainfall
In December, the rain falls for 2.7 days. Throughout December, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 110.9 rainfall days, and 17.95" (456mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Saint John, during December, snow falls for 15.7 days and regularly aggregates up to 3.98" (101mm) of snow. Throughout the year, there are 86.8 snowfall days, and 23.78" (604mm) of snow is accumulated.Daylight
With an average of 8h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 8:12 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 8:32 am and sunset at 4:51 pm CST.
Sunshine
In Saint John, the average sunshine in December is 3.2h.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 ordinary individuals.Note: The daily high UV index of 1 in December translates into this advice:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Always opt for UVA and UVB-resistant sunglasses on radiant days. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint John, ND
- Average high temperature in December: 16.7°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is January (14.2°F).
- Average low temperature in December: 5.9°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (0.5°F).
Average pressure in December
Saint John, ND
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Saint John, ND
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is October (11mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in December
Saint John, ND
- Average humidity in December: 91%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (60%).
Average rainfall in December
Saint John, ND
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is June (3.27").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in December
Saint John, ND
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (2 days).
Average snowfall in December
Saint John, ND
- Average snowfall in December: 3.98"
The month with the highest snowfall is November (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint John, ND
- Average snowfall days in December: 15.7 days
The month with the highest number of snowfall days is December (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint John, ND
- Average daylight in December: 8h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 3h and 12min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Saint John, ND
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in December
Saint John, ND
- Average UV index in December: 1
The months with the highest UV index are 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
Saint John, ND
- Average cloud cover in December: 67
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in December
Saint John, ND
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
