December weather forecastPetersburg, NY
December
Weather in December
The first month of the winter, December, is still a cold month in Petersburg, New York, with an average temperature ranging between max 32.7°F (0.4°C) and min 22.1°F (-5.5°C).Temperature
With December's arrival, Petersburg's weather changes as the average high-temperature falls from a chilly 43.7°F (6.5°C) in November to a cold 32.7°F (0.4°C). During the month of December, an average temperature of 22.1°F (-5.5°C) is noted during the nights.Humidity
In December, the average relative humidity is 85%.Rainfall
In Petersburg, during December, the rain falls for 11.1 days and regularly aggregates up to 3.19" (81mm) of precipitation. In Petersburg, during the entire year, the rain falls for 167.1 days and collects up to 35.98" (914mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Petersburg, in December, snow falls for 11.2 days, with typically accumulated 6.93" (176mm) of snow. In Petersburg, during the entire year, snow falls for 66.1 days and aggregates up to 39.09" (993mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:04 am and sunset at 4:20 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:29 pm EST.
Sunshine
In Petersburg, the average sunshine in December is 3.8h.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. When the Sun is at its strongest around midday, find shade and limit exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Petersburg, NY
- Average high temperature in December: 32.7°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 22.1°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in December
Petersburg, 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
Petersburg, NY
- Average wind speed in December: 8.4mph
The windiest months (with the highest average wind speed) are January and February (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Petersburg, NY
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Petersburg, NY
- Average rainfall in December: 3.19"
The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is March (2.6").
Average rainfall days in December
Petersburg, NY
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in December
Petersburg, NY
- Average snowfall in December: 6.93"
The month with the highest snowfall is February (10").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Petersburg, NY
- Average snowfall days in December: 11.2 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Petersburg, 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 48min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in December
Petersburg, NY
- Average sunshine days in December: 11.7 days
The month with the most sunshine days is September (14.3 days).
The month with the least sunshine days is February (9 days).
Average UV index in December
Petersburg, NY
- 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 February and December (UV index 1).
Average cloud cover in December
Petersburg, NY
- Average cloud cover in December: 60
The month with the most cloud cover is February (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in December
Petersburg, NY
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
