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
December comes with a decrease in the average high-temperature, falling from a frosty 45.3°F (7.4°C) in November to a wintry 34.3°F (1.3°C). Night temperatures in December exhibit a subtle decrease, settling at an average of 26.6°F (-3°C).Humidity
The average relative humidity in December is 83%.Rainfall
In Jamestown, in December, during 7.3 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 115 rainfall days, and 10.59" (269mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. In Jamestown, during December, snow falls for 12.7 days and regularly aggregates up to 1.46" (37mm) of snow. In Jamestown, during the entire year, snow falls for 63.2 days and aggregates up to 8.19" (208mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:55 am and sunset at 5:10 pm. On the last day of December, sunrise is at 8:13 am and sunset at 5:19 pm EST.
Sunshine
In December, the average sunshine is 3h.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 exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 1 in December translates into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December in Jamestown?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Jamestown have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Jamestown have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Jamestown, MI
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Jamestown, MI
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Jamestown, MI
- Average wind speed in December: 9.6mph
The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in December
Jamestown, MI
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Jamestown, MI
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is October (1.3").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in December
Jamestown, MI
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is October (14 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in December
Jamestown, MI
- Average snowfall in December: 1.46"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Jamestown, MI
- Average snowfall days in December: 12.7 days
The month with the highest number of snowfall days is January (18.5 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, MI
- 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: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in December
Jamestown, MI
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is March (17.8 days).
The month with the least sunshine days is January (10.2 days).
Average UV index in December
Jamestown, MI
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Jamestown, MI
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Jamestown, MI
- 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, Michigan, USA
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