December weather forecast
Oswego, NY

The colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers
The colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers

Weather in December

The first month of the winter, December, is also a wintry month in Oswego, New York, with an average temperature ranging between max 36.5°F (2.5°C) and min 29.5°F (-1.4°C).

Temperature

In December, the average high-temperature drops from a frosty 45.9°F (7.7°C) in November to a wintry 36.5°F (2.5°C). The average low-temperature, in December, is 29.5°F (-1.4°C).

Humidity

In Oswego, 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. Throughout the year, there are 163 rainfall days, and 37.83" (961mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in Oswego, New York. In Oswego, New York, during December, snow falls for 9.3 days and regularly aggregates up to 3.27" (83mm) of snow. Throughout the year, in Oswego, there are 46.3 snowfall days, and 14.8" (376mm) of snow is accumulated.

Ocean temperature

In Oswego, the average water temperature is 42.4°F (5.8°C).
Note: Swimming in 42.4°F (5.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

With an average of 9h and 1min of daylight, December has the shortest days of the year in Oswego, New York.
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, in Oswego, New York, 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 in Oswego are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 1 in December transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Oswego?

The average relative humidity in December in Oswego, New York, is 80%.

How many days does it rain in December in Oswego?

In Oswego, in December, during 10.1 rainfall days, 2.95" (75mm) of precipitation is typically accumulated.

How many days does it snow in December in Oswego?

In Oswego, New York, in December, during 9.3 snowfall days, 3.27" (83mm) of snow is typically accumulated.

What is the water temperature in December in Oswego?

In December, the average ocean temperature in Oswego, New York, is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Oswego?

The month with the shortest days in Oswego, New York, is December, with an average of 9h and 1min of daylight.

How many hours of daylight does Oswego have in December?

In Oswego, the average day length in December is 9h and 1min.

When are sunrise and sunset in December in Oswego?

In December, on the first day of the month, sunrise is at 7:19 am and sunset at 4:31 pm. On the last day of the month, in Oswego, New York, sunrise is at 7:38 am and sunset at 4:39 pm EST.

How long on average sun shines in December in Oswego?

The average sunshine duration in December in Oswego is 2.7h.

What is the month with the lowest UV index in Oswego?

The months with the lowest UV index in Oswego, New York, are January and December, with an average maximum UV index of 1.

What is the UV index intensity in December in Oswego?

In December, the average daily maximum UV index in Oswego is 1. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Oswego, NY

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).

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Average pressure in December
Oswego, NY

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).

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Average wind speed in December
Oswego, NY

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).

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Average humidity in December
Oswego, NY

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%).

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Average rainfall in December
Oswego, NY

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").

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Average rainfall days in December
Oswego, NY

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).

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Average snowfall in December
Oswego, NY

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").

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Average snowfall days in December
Oswego, NY

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).

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Average sea temperature in December
Oswego, NY

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).

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Average daylight in December /
Average sunshine in December
Oswego, NY

Average daylight in December / Average sunshine in December - Oswego, NY
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 22min).
The month with the shortest days is December (Average daylight: 9h and 1min).

  • Average sunshine in December: 2h and 42min

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).

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Average sunshine days in December
Oswego, NY

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).

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Average UV index in December
Oswego, NY

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).

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Average cloud cover in December
Oswego, NY

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).

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Average visibility in December
Oswego, NY

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).

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