Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Jamestown observes a minor decrease in the average high-temperature with the arrival of December, falling from November's frosty 49.1°F (9.5°C) to a wintry 39.2°F (4°C). In Jamestown, in December, the average low-temperature is a freezing cold 29.1°F (-1.6°C).Humidity
In Jamestown, the average relative humidity in December is 82%.Rainfall
In Jamestown, in December, it is raining for 12.1 days, with typically 2.76" (70mm) of accumulated precipitation. In Jamestown, during the entire year, the rain falls for 169.3 days and collects up to 32.99" (838mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Jamestown, in December, snow falls for 10 days, with typically accumulated 2.8" (71mm) of snow. Throughout the year, in Jamestown, there are 43.7 snowfall days, and 14.45" (367mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Jamestown, Ohio.On the first day of December in Jamestown, Ohio, sunrise is at 7:37 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:20 pm EST.
Sunshine
The average sunshine in December is 4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Jamestown during December?
What is the average humidity in December in Jamestown?
How many days does it rain in December in Jamestown?
How many days does it snow in December in Jamestown?
What is the month with the shortest days in Jamestown?
How many hours of daylight does Jamestown have in December?
When is the sunrise / sunset in December in Jamestown?
How long on average sun shines in December in Jamestown?
What is the month with the lowest UV index in Jamestown?
How high is the UV index in December in Jamestown?
Average temperature in December
Jamestown, OH
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in December: 29.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Jamestown, OH
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Jamestown, OH
- Average wind speed in December: 9.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Jamestown, OH
- Average humidity in December: 82%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in December
Jamestown, OH
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in December
Jamestown, OH
- Average rainfall days in December: 12.1 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (9.4 days).
Average snowfall in December
Jamestown, OH
- Average snowfall in December: 2.8"
The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Jamestown, OH
- Average snowfall days in December: 10 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jamestown, OH
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in December
Jamestown, OH
- Average sunshine days in December: 11.3 days
The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is May (9.2 days).
Average UV index in December
Jamestown, OH
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Jamestown, OH
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Jamestown, OH
- 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).
Jamestown, Ohio, USA
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