Great River
New York, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Great River, NY

The first month of the winter, December, is still a chilly month in Great River, New York, with average temperature ranging between max 44.1°F (6.7°C) and min 37.2°F (2.9°C).

Temperature

In Great River, New York, the average high-temperature in December marginally drops, from a cool 52.3°F (11.3°C) in November, to a frosty 44.1°F (6.7°C). In Great River, the average low-temperature is 37.2°F (2.9°C).

Humidity

In Great River, New York, the average relative humidity is 74%.

Rainfall

The month with the most rainfall is December when the rain falls for 12.3 days and typically aggregates up to 3.74" (95mm) of precipitation.

Snowfall

Months with snowfall are January through March, May, October and December. December is the first month it typically snows. Throughout December, in the average 2.4 snowfall days, it receives 1.22" (31mm) of snow. In Great River, during the entire year, snow falls for 14.7 days, and aggregates up to 6.14" (156mm) of snow.

Ocean temperature

In Great River, in December, the average water temperature is 48.9°F (9.4°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 9.3h of daylight.

Sunshine

In Great River, the average sunshine is 4.9h.

UV index

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 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 Great River?

In Great River, New York, in December, the average high-temperature is 44.1°F (6.7°C), and the average low-temperature is 37.2°F (2.9°C).

What is the average humidity in December in Great River?

The average relative humidity in December in Great River, New York, is 74%.

How much does it rain in Great River in December?

In Great River, during December, the rain falls for 12.3 days and regularly aggregates up to 3.74" (95mm) of precipitation.

What is the wettest month in Great River?

December is the month with the most rainfall in Great River, New York. Rain falls for 12.3 days and accumulates 3.74" (95mm) of precipitation.

When does it start snowing in Great River?

December is the first month it typically snows. Throughout December, in the average 2.4 snowfall days, it receives 1.22" (31mm) of snow.

What is the water temperature in December in Great River?

In Great River, the average seawater temperature in December is 48.9°F (9.4°C). 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.

What is the month with the shortest days in Great River?

The month with the shortest days is December, with an average of 9.3h of daylight.

How many hours of daylight does Great River have in December?

In Great River, the average length of the day in December is 9.3h.

How many hours of sunshine does Great River have in December?

In December, the average sunshine is 4.9h.

When is the lowest UV index in Great River?

Months with the lowest UV index are January through March and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Great River?

In Great River, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in December - Great River, NY
  • Average high temperature in December: 44.1°F

The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 37.2°F

The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).

Average humidity in December - Great River, NY
  • Average humidity in December: 74%

Months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).

Average rainfall in December - Great River, NY
  • Average rainfall in December: 3.74"

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the lowest rainfall) is January (2.17").

Average rainfall days in December - Great River, NY
  • Average rainfall days in December: 12.3 days

The month with the highest number of rainy days is July (17.7 days).
The month with the lowest number of rainy days is January (8.3 days).

Average snowfall in December - Great River, NY
  • Average snowfall in December: 1.22"

The month with the highest snowfall is March (2.13").
Months with the lowest snowfall are April, June, July, August, September and November (0").

Average snowfall days in December - Great River, NY
  • Average snowfall days in December: 2.4 days

The month with the highest number of snowfall days is February (4.6 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in December - Great River, NY
  • Average sea temperature in December: 49°F

The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

Average daylight in December / Average sunshine in December - Great River, NY
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 4.9h

The month with most sunshine is July (Average sunshine: 10.8h).
The month with least sunshine is February (Average sunshine: 4.8h).

Average UV index in December - Great River, NY
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March and December (UV index 2).