Average Weather in December in Greenville Michigan, United States
In Greenville, the month of December is characterized by falling daily high temperatures, with daily highs decreasing by 8°F, from 39°F to 31°F over the course of the month, and rarely exceeding 53°F or dropping below 19°F.
Daily low temperatures decrease by 8°F, from 28°F to 20°F, rarely falling below 5°F or exceeding 38°F.
For reference, on July 19, the hottest day of the year, temperatures in Greenville typically range from 61°F to 81°F, while on January 29, the coldest day of the year, they range from 16°F to 29°F.
Average High and Low Temperature in December
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in December
The month of December in Greenville experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 61% to 68%.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 39% of the time.
For reference, on January 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on August 7, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.
Cloud Cover in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Greenville, the chance of a wet day over the course of December is essentially constant, remaining around 22% throughout.
For reference, the year's highest daily chance of a wet day is 34% on June 13, and its lowest chance is 16% on February 4.
Over the course of December in Greenville, the chance of a day with only rain decreases from 14% to 8%, the chance of a day with mixed snow and rain remains an essentially constant 4% throughout, and the chance of a day with only snow increases from 5% to 10%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Greenville is decreasing, starting the month at 1.6 inches, when it rarely exceeds 2.8 inches or falls below 0.5 inches, and ending the month at 0.8 inches, when it rarely exceeds 1.8 inches.
Average Monthly Rainfall in December
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during December in Greenville is essentially constant, remaining about 0.5 inches throughout, and rarely exceeding 1.3 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Greenville, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 59 minutes of daylight and the longest day is December 1, with 9 hours, 13 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Greenville is 7:53 AM on December 1 and the latest sunrise is 19 minutes later at 8:12 AM on December 31.
The earliest sunset is 5:05 PM on December 9 and the latest sunset is 10 minutes later at 5:15 PM on December 31.
Daylight saving time is observed in Greenville during 2017, but it neither starts nor ends during December, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:01 AM and sets 15 hours, 23 minutes later, at 9:24 PM, while on December 21, the shortest day of the year, it rises at 8:09 AM and sets 8 hours, 59 minutes later, at 5:08 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Greenville is essentially constant during December, remaining around 0% throughout.
For reference, on July 27, the muggiest day of the year, there are muggy conditions 32% of the time, while on November 16, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in December
The average hourly wind speed in Greenville is essentially constant during December, remaining within 0.2 miles per hour of 6.3 miles per hour throughout.
For reference, on January 12, the windiest day of the year, the daily average wind speed is 6.6 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.
Average Wind Speed in December
Wind Direction in December
Greenville is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Greenville is decreasing during December, falling by 5°F, from 45°F to 40°F, over the course of the month.
Average Water Temperature in December
The average daily incident shortwave solar energy in Greenville is essentially constant during December, remaining within 0.1 kWh of 1.4 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 1.3 kWh on December 23.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Greenville are 43.178 deg latitude, -85.253 deg longitude, and 846 ft elevation.
The topography within 2 miles of Greenville contains only modest variations in elevation, with a maximum elevation change of 161 feet and an average elevation above sea level of 841 feet. Within 10 miles also contains only modest variations in elevation (276 feet). Within 50 miles contains only modest variations in elevation (787 feet).
The area within 2 miles of Greenville is covered by artificial surfaces (53%), trees (25%), and cropland (17%), within 10 miles by cropland (52%) and trees (37%), and within 50 miles by cropland (59%) and trees (29%).
This report illustrates the typical weather in Greenville year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Greenville.
For each station, the records are corrected for the elevation difference between that station and Greenville according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Greenville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Greenville and a given station.
The stations contributing to this reconstruction are: Gerald R. Ford International Airport (29%, 40 kilometers, southwest); Gratiot Community Airport (21%, 49 kilometers, east); Roben-Hood Airport (14%, 63 kilometers, north); Fremont Municipal Airport (13%, 67 kilometers, northwest); Lansing, Capital City Airport (12%, 70 kilometers, southeast); and Fitch H Beach Airport (11%, 76 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .