December weather forecastOnondaga Castle, NY
December
Weather in December
December, the first month of the winter in Onondaga Castle, is also a wintry month, with temperature in the range of an average high of 34.2°F (1.2°C) and an average low of 25.2°F (-3.8°C).Temperature
December weather is marked by a drop in the average high-temperature, falling from a chilly 44.8°F (7.1°C) in November to a wintry 34.2°F (1.2°C). The month of December is marked by an average minimum temperature of 25.2°F (-3.8°C), slightly cooler than its daytime counterpart.Humidity
In December, the average relative humidity in Onondaga Castle is 85%.Rainfall
In December, in Onondaga Castle, New York, the rain falls for 8.8 days. Throughout December, 1.97" (50mm) of precipitation is accumulated. Throughout the year, there are 148.8 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. December is the month with the most snowfall in Onondaga Castle, New York. Snow falls for 13.3 days and accumulates 5.87" (149mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:16 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:40 pm EST.
Sunshine
In Onondaga Castle, the average sunshine in December is 2.9h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 1 in December translates into this advice:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Employ a wide-brim hat for potent defense against up to 50% of UV rays. 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
Average temperature in December
Onondaga Castle, NY
- Average high temperature in December: 34.2°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 (28°F).
- Average low temperature in December: 25.2°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in December
Onondaga Castle, 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
Onondaga Castle, NY
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).
Average humidity in December
Onondaga Castle, NY
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and May (78%).
Average rainfall in December
Onondaga Castle, NY
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in December
Onondaga Castle, NY
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (6 days).
Average snowfall in December
Onondaga Castle, NY
- Average snowfall in December: 5.87"
The month with the highest snowfall is December (5.87").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Onondaga Castle, NY
- Average snowfall days in December: 13.3 days
The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Onondaga Castle, 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: 2h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).
Average sunshine days in December
Onondaga Castle, NY
- Average sunshine days in December: 11.4 days
The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in December
Onondaga Castle, 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
Onondaga Castle, NY
- Average cloud cover in December: 71
The months with the most cloud cover are January and February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in December
Onondaga Castle, NY
- 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).
