Oswego
New York, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Oswego, NY

A unique view of the colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers
A unique view of the colorful sun rising over a calm marina in Oswego, New York, with a view of numerous boats and yachts docked along several piers
December, the first month of the winter, in Oswego, is still a cold month, with average temperature fluctuating between 36.5°F (2.5°C) and 29.5°F (-1.4°C).

Temperature

In Oswego, the average high-temperature decreases, from a chilly 45.9°F (7.7°C) in November, to a cold 36.5°F (2.5°C). In December, the average low-temperature is 29.5°F (-1.4°C).

Humidity

The average relative humidity in Oswego, New York, 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

Months with snowfall are January through April, October through December. In Oswego, in December, snow falls for 9.3 days, with typically accumulated 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, New York, the average water temperature is 42.4°F (5.8°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The month with the shortest days is December, with an average of 9h of daylight.

Sunshine

In December, the average sunshine in Oswego is 2.7h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Oswego?

In December, the average high-temperature is 36.5°F (2.5°C), and the average low-temperature is 29.5°F (-1.4°C).

What is the average humidity in December in Oswego?

In Oswego, the average relative humidity in December is 80%.

How much does it rain in Oswego in December?

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

How much does it snow in Oswego in December?

In Oswego, in December, snow falls for 9.3 days, with typically accumulated 3.27" (83mm) of snow.

What is the water temperature in December in Oswego?

In Oswego, New York, in December, the average water temperature is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Oswego?

December has the shortest days of the year in Oswego, with an average of 9h of daylight.

How many hours of daylight does Oswego have in December?

In December, the average length of the day in Oswego is 9h.

How many hours of sunshine does Oswego have in December?

The average sunshine in December in Oswego is 2.7h.

What are the months with the lowest UV index in Oswego?

Months with the lowest UV index in Oswego 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, New York, is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
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

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 humidity in December - Oswego, NY
  • Average humidity in December: 80%

The month with the highest relative humidity is June (83%).
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 lowest 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 lowest number of 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").
Months with the lowest 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).
Months with the lowest number of 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

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in December: 2.7h

The month with most sunshine is July (Average sunshine: 10.5h).
The month with least sunshine is January (Average sunshine: 2.3h).

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).
Months with the lowest UV index are January and December (UV index 1).