December weather forecastMentor, OH
December
Weather in December
December welcomes winter in full swing to Mentor. The temperatures drop further from November's lows, making way for a chilly climate. Snowfall returns, covering the city in white, and creating classic winter scenery. Despite reduced daylight hours, the festive decorations light up the city, offering warmth amidst the cold. December’s weather sets the stage for a cosy, holiday season.Temperature
In Mentor, the beginning of December is marked by a marginally lowered average high-temperature, shifting from November's chilly 46.8°F (8.2°C) to a wintry 37.9°F (3.3°C). Mentor's temperature during December nights registers a minor decrease to an average low of 30.2°F (-1°C).Humidity
In Mentor, the average relative humidity in December is 82%.Rainfall
In Mentor, during December, the rain falls for 11.4 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, there are 178.9 rainfall days, and 32.2" (818mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Mentor. In Mentor, in December, during 13.5 snowfall days, 3.98" (101mm) of snow is typically accumulated. In Mentor, during the entire year, snow falls for 64.4 days and aggregates up to 19.92" (506mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:33 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:52 am and sunset at 5:05 pm EST.
Sunshine
In Mentor, the average sunshine in December is 3.1h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 1 in December translates into this advice:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mentor, OH
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Mentor, OH
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Mentor, OH
- Average wind speed in December: 11.6mph
The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Mentor, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July and August (76%).
Average rainfall in December
Mentor, OH
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Mentor, OH
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is October (18 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Mentor, OH
- Average snowfall in December: 3.98"
The month with the highest snowfall is February (5.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mentor, OH
- Average snowfall days in December: 13.5 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mentor, OH
- Average daylight in December: 9h and 12min
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 12min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in December
Mentor, OH
- Average sunshine days in December: 7.7 days
The month with the most sunshine days is May (11.4 days).
The month with the least sunshine days is January (6.8 days).
Average UV index in December
Mentor, OH
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Mentor, OH
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in December
Mentor, OH
- 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).
