December weather forecastSempronius, NY
December
Weather in December
The first month of the winter, December, is also an icy month in Sempronius, New York, with temperature in the range of an average low of 25.3°F (-3.7°C) and an average high of 34.3°F (1.3°C).Temperature
Sempronius's December weather features a mild decline in high-temperatures, reducing from a chilly 44.6°F (7°C) in November to a cold 34.3°F (1.3°C). Sempronius's nocturnal December readings average at a freezing cold 25.3°F (-3.7°C), showing little variation from the daytime temperatures.Humidity
In December, the average relative humidity is 86%.Rainfall
In Sempronius, New York, during December, the rain falls for 8.9 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 137.8 rainfall days, and 13.74" (349mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Sempronius, in December, during 15.1 snowfall days, 3.23" (82mm) of snow is typically accumulated. In Sempronius, during the entire year, snow falls for 76.2 days and aggregates up to 16.93" (430mm) of snow.Daylight
December has the shortest days of the year in Sempronius, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:16 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:41 pm EST.
Sunshine
The average sunshine in December is 3h.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sempronius, NY
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 25.3°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Sempronius, 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 (29.93"Hg).
Average wind speed in December
Sempronius, NY
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Sempronius, NY
- Average humidity in December: 86%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in December
Sempronius, NY
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in December
Sempronius, NY
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in December
Sempronius, NY
- Average snowfall in December: 3.23"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Sempronius, NY
- Average snowfall days in December: 15.1 days
The month with the highest number of snowfall days is January (18.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sempronius, NY
- Average daylight in December: 9h and 6min
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 0min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in December
Sempronius, NY
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in December
Sempronius, 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 February and December (UV index 1).
Average cloud cover in December
Sempronius, NY
- Average cloud cover in December: 70
The month with the most cloud cover is February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Sempronius, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, July and December (5mi).
