December weather forecast
Jamesville, NY

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Weather in December

The first month of the winter, December, is also a wintry month in Jamesville, New York, with an average temperature fluctuating between 25.2°F (-3.8°C) and 34.2°F (1.2°C).

Temperature

Jamesville's weather in December involves a decrease in the average high-temperature, moving down from November's frosty 44.8°F (7.1°C) to a cold 34.2°F (1.2°C). Jamesville, during the nights of December, averages a temperature close to its daytime high, at a subzero cold 25.2°F (-3.8°C).

Humidity

The average relative humidity in December is 85%.

Rainfall

In Jamesville, in December, it is raining for 8.8 days, with typically 1.97" (50mm) of accumulated precipitation. Throughout the year, there are 148.8 rainfall days, and 25" (635mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. The month with the most snowfall in Jamesville is December, when snow falls for 13.3 days and typically aggregates up to 5.87" (149mm) of snow.

Daylight

The month with the shortest days in Jamesville is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:30 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:39 pm EST.

Sunshine

The average sunshine in December is 2.9h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 1 during December translates into the following directions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. 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. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

In Jamesville, 34.2°F (1.2°C) is the average high-temperature and 25.2°F (-3.8°C) is the average low-temperature during December.

What is the average humidity in December?

In December, the average relative humidity is 85%.

How much does it rain in December?

In Jamesville, in December, during 8.8 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

What is the snowiest month?

The month with the most snowfall is December, when snow falls for 13.3 days and typically aggregates up to 5.87" (149mm) of snow.

How much does it snow in December?

In Jamesville, in December, snow falls for 13.3 days, with typically accumulated 5.87" (149mm) of snow.

What is the month with the shortest days?

With an average of 9h and 6min of daylight, December has the shortest days of the year.

How many hours of daylight does Jamesville have in December?

In Jamesville, the average day length in December is 9h and 4min.

What time are sunrise and sunset in December in Jamesville?

In December, on the first day of the month, sunrise is at 7:16 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:39 pm EST.

How many hours of sunshine does Jamesville have in December?

In December, the average sunshine duration is 2.9h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

In Jamesville, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes 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
Jamesville, NY

Average temperature in December - Jamesville, NY
  • Average high temperature in December: 34.2°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in December: 25.2°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 (16.7°F).

Average pressure in December
Jamesville, NY

Average pressure in December - Jamesville, NY
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Jamesville, NY

Average wind speed in December - Jamesville, NY
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).

Average humidity in December
Jamesville, NY

Average humidity in December - Jamesville, NY
  • Average humidity in December: 85%

The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and May (78%).

Average rainfall in December
Jamesville, NY

Average rainfall in December - Jamesville, NY
  • Average rainfall in December: 1.97"

The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is January (1.42").

Average rainfall days in December
Jamesville, NY

Average rainfall days in December - Jamesville, NY
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (6 days).

Average snowfall in December
Jamesville, NY

Average snowfall in December - Jamesville, NY
  • Average snowfall in December: 5.87"

The month with the highest snowfall is December (5.87").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Jamesville, NY

Average snowfall days in December - Jamesville, NY
  • Average snowfall days in December: 13.3 days

The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in December: 2h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 24min).

Average sunshine days in December
Jamesville, NY

Average sunshine days in December - Jamesville, NY
  • Average sunshine days in December: 11.4 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (8.4 days).

Average UV index in December
Jamesville, NY

Average UV index in December - Jamesville, 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).

Average cloud cover in December
Jamesville, NY

Average cloud cover in December - Jamesville, NY
  • Average cloud cover in December: 71

The months with the most cloud cover are January and February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in December
Jamesville, NY

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

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).

Jamesville, New York, USA

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