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 sea temperature 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
In Oswego, the average high-temperature in December drops from a frosty 45.9°F (7.7°C) in November to a cold 36.5°F (2.5°C). During the December nights, Oswego's temperature maintains an average close to the daytime highs, settling at a freezing cold 29.5°F (-1.4°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Oswego, during December, the rain falls for 10.1 days and regularly aggregates up to 2.95" (75mm) of precipitation. In Oswego, during the entire year, the rain falls for 163 days and collects up to 37.83" (961mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Oswego, in December, during 9.3 snowfall days, 3.27" (83mm) of snow is typically accumulated. In Oswego, during the entire year, snow falls for 46.3 days and aggregates up to 14.8" (376mm) of snow.Ocean temperature
In Oswego, in December, the average water temperature is 42.4°F (5.8°C).Note: It is life-risking to swim in 42.4°F (5.8°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.
Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:19 am and sunset at 4:31 pm. On the last day of December, sunrise is at 7:38 am and sunset at 4:39 pm EST.
Sunshine
The average sunshine in December is 2.7h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 1 during December leads to these advisories:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in Oswego?
How many days does it rain in December?
How many days does it snow in December?
How cold is the water in December?
What is the month with the shortest days in Oswego?
How many hours of daylight does Oswego have in December?
When are sunrise and sunset in December in Oswego?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Oswego, NY
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 29.5°F
The months with the highest average low temperature are July and August (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Oswego, NY
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Oswego, NY
- Average wind speed in December: 14.7mph
The windiest month (with the highest average wind speed) is January (15mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in December
Oswego, NY
- Average humidity in December: 80%
The month with the highest relative humidity is June (83%).
The months with the lowest relative humidity are September and November (75%).
Average rainfall in December
Oswego, NY
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in December
Oswego, NY
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is February (6 days).
Average snowfall in December
Oswego, NY
- Average snowfall in December: 3.27"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Oswego, NY
- Average snowfall days in December: 9.3 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Oswego, NY
- Average sea temperature in December: 42.3°F
The best month for swimming (with the highest average sea temperature) is August (73.2°F).
The coldest month (with the lowest average sea temperature) is March (35.4°F).
Average daylight in December /
Average sunshine in December
Oswego, NY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Oswego, NY
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is September (13.7 days).
The month with the least sunshine days is December (8.5 days).
Average UV index in December
Oswego, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Oswego, NY
- Average cloud cover in December: 75
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in December
Oswego, NY
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Oswego, New York, USA
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