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
Setting in of December comes with a decrease in the average high-temperature, moving from a chilly 44.8°F (7.1°C) in November to a cold 34.5°F (1.4°C). A minimal decline in temperature from daytime highs is anticipated throughout the December nights, averaging a subzero cold 25.5°F (-3.6°C).Humidity
In Marcellus, the average relative humidity in December is 85%.Rainfall
In Marcellus, in December, during 9.2 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 141.4 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Marcellus. The months with the most snowfall are February and December, with an average 3.62" (92mm) of accumulated snow.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:17 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:40 pm EST.
Sunshine
In Marcellus, the average sunshine in December is 2.9h.UV index
The months with the lowest UV index in Marcellus are January 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 ordinary individuals.Note: The daily high UV index of 1 during December translates into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather Atlas | 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?
When does it snow the most?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Marcellus have in December?
When is the sunrise / sunset in December in Marcellus?
How many hours of sunshine does Marcellus have in December?
When is the lowest UV index in Marcellus?
What is the UV index intensity in December?
Average temperature in December
Marcellus, NY
- Average high temperature in December: 34.5°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Marcellus, 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
Marcellus, NY
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in December
Marcellus, NY
- Average humidity in December: 85%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is April (78%).
Average rainfall in December
Marcellus, NY
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is September (1.02").
Average rainfall days in December
Marcellus, NY
- Average rainfall days in December: 9.2 days
The months with the highest number of rainy days are May and July (15 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in December
Marcellus, NY
- Average snowfall in December: 3.62"
The months with the highest snowfall are February and December (3.62").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Marcellus, NY
- Average snowfall days in December: 14.3 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Marcellus, 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: 2h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).
Average sunshine days in December
Marcellus, NY
- Average sunshine days in December: 10.3 days
The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in December
Marcellus, 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
Marcellus, NY
- Average cloud cover in December: 71
The months with the most cloud cover are January and February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Marcellus, 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).
Marcellus, New York, USA
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