December weather forecast
Jamestown, NY

Weather in December

The first month of the winter, December, is also a wintry month in Jamestown, New York, with an average temperature fluctuating between 25.9°F (-3.4°C) and 34.5°F (1.4°C).

Temperature

In December, the average high-temperature drops from a frosty 43.7°F (6.5°C) in November to a cold 34.5°F (1.4°C). The average low-temperature, in December, is 25.9°F (-3.4°C).

Humidity

In Jamestown, the average relative humidity in December is 87%.

Rainfall

In Jamestown, during December, the rain falls for 9.8 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Jamestown, during the entire year, the rain falls for 163.4 days and collects up to 27.72" (704mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. The month with the most snowfall in Jamestown is December, when snow falls for 17.1 days and typically aggregates up to 7.68" (195mm) of snow.

Daylight

With an average of 9h and 10min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:25 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:54 pm EST.

Sunshine

In December, the average sunshine in Jamestown is 2.4h.

UV index

The months with the lowest UV index in Jamestown are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 1 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the average humidity in December in Jamestown?

The average relative humidity in December is 87%.

How many days does it rain in December in Jamestown?

In December, in Jamestown, New York, the rain falls for 9.8 days. Throughout December, 2.24" (57mm) of precipitation is accumulated.

When does it snow the most in Jamestown?

The month with the most snowfall in Jamestown, New York, is December, when snow falls for 17.1 days and typically aggregates up to 7.68" (195mm) of snow.

How much does it snow in Jamestown in December?

In Jamestown, New York, in December, during 17.1 snowfall days, 7.68" (195mm) of snow is typically accumulated.

What is the month with the shortest days in Jamestown?

December has the shortest days of the year in Jamestown, New York, with an average of 9h and 10min of daylight.

How many hours of daylight does Jamestown have in December?

In December, the average day length in Jamestown is 9h and 10min.

What time are sunrise and sunset in December in Jamestown?

On the first day of December in Jamestown, New York, sunrise is at 7:25 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:54 pm EST.

How long on average sun shines in December in Jamestown?

In Jamestown, the average sunshine duration in December is 2.4h.

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

January and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in December in Jamestown?

In Jamestown, New York, the average daily maximum UV index in December is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unsafe 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
Jamestown, NY

Average temperature in December - Jamestown, NY
  • Average high temperature in December: 34.5°F

The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in December: 25.9°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).

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Average pressure in December
Jamestown, NY

Average pressure in December - Jamestown, NY
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Jamestown, NY

Average wind speed in December - Jamestown, NY
  • Average wind speed in December: 10.4mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

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Average humidity in December
Jamestown, NY

Average humidity in December - Jamestown, NY
  • Average humidity in December: 87%

The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are April, May and September (81%).

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Average rainfall in December
Jamestown, NY

Average rainfall in December - Jamestown, NY
  • Average rainfall in December: 2.24"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in December
Jamestown, NY

Average rainfall days in December - Jamestown, NY
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is January (6.9 days).

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Average snowfall in December
Jamestown, NY

Average snowfall in December - Jamestown, NY
  • Average snowfall in December: 7.68"

The month with the highest snowfall is December (7.68").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Jamestown, NY

Average snowfall days in December - Jamestown, NY
  • Average snowfall days in December: 17.1 days

The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Jamestown, NY
  • Average daylight in December: 9h and 10min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 10min).

  • Average sunshine in December: 2h and 24min

The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

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Average sunshine days in December
Jamestown, NY

Average sunshine days in December - Jamestown, NY
  • Average sunshine days in December: 6.1 days

The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (5.6 days).

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Average UV index in December
Jamestown, NY

Average UV index in December - Jamestown, NY
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Jamestown, NY

Average cloud cover in December - Jamestown, NY
  • Average cloud cover in December: 76

The month with the most cloud cover is January (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
Jamestown, NY

Average visibility in December - Jamestown, NY
  • Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (4mi).

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