Average Weather in December in South Whitley Indiana, United States
Daily high temperatures decrease by 8°F, from 43°F to 34°F, rarely falling below 20°F or exceeding 56°F.
Daily low temperatures decrease by 8°F, from 30°F to 22°F, rarely falling below 4°F or exceeding 42°F.
For reference, on July 19, the hottest day of the year, temperatures in South Whitley typically range from 65°F to 84°F, while on January 29, the coldest day of the year, they range from 19°F to 32°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 South Whitley experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 58% to 63%.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 42% of the time.
For reference, on January 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 63%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In South Whitley, the chance of a wet day over the course of December is decreasing, starting the month at 26% and ending it at 22%.
For reference, the year's highest daily chance of a wet day is 39% on May 27, and its lowest chance is 18% on February 4.
Over the course of December in South Whitley, the chance of a day with only rain decreases from 21% to 14%, the chance of a day with mixed snow and rain remains an essentially constant 3% throughout, and the chance of a day with only snow increases from 2% to 5%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in South Whitley is decreasing, starting the month at 2.2 inches, when it rarely exceeds 3.9 inches or falls below 0.8 inches, and ending the month at 1.6 inches, when it rarely exceeds 3.6 inches or falls below 0.2 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 South Whitley is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.1 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in South Whitley, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 13 minutes of daylight and the longest day is December 1, with 9 hours, 26 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in South Whitley is 7:48 AM on December 1 and the latest sunrise is 19 minutes later at 8:07 AM on December 31.
The earliest sunset is 5:13 PM on December 8 and the latest sunset is 10 minutes later at 5:23 PM on December 31.
Daylight saving time is observed in South Whitley during 2018, 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 6:10 AM and sets 15 hours, 8 minutes later, at 9:18 PM, while on December 21, the shortest day of the year, it rises at 8:04 AM and sets 9 hours, 13 minutes later, at 5:17 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in South Whitley is essentially constant during December, remaining around 0% throughout.
For reference, on July 26, the muggiest day of the year, there are muggy conditions 44% 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 South Whitley is gradually increasing during December, increasing from 11.8 miles per hour to 12.3 miles per hour over the course of the month.
For reference, on January 15, the windiest day of the year, the daily average wind speed is 12.7 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 7.3 miles per hour.
Average Wind Speed in December
Wind Direction in December
South Whitley 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 South Whitley 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 growing season in South Whitley typically lasts for 6.0 months (181 days), from around April 21 to around October 19, rarely starting before April 2 or after May 9, and rarely ending before September 30 or after November 7.
The month of December in South Whitley is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in South Whitley are essentially constant during December, remaining within 4°F of 3,207°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in South Whitley is essentially constant during December, remaining within 0.1 kWh of 1.7 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 1.6 kWh on December 21.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of South Whitley are 41.085 deg latitude, -85.628 deg longitude, and 830 ft elevation.
The topography within 2 miles of South Whitley is essentially flat, with a maximum elevation change of 95 feet and an average elevation above sea level of 819 feet. Within 10 miles is essentially flat (253 feet). Within 50 miles contains only modest variations in elevation (617 feet).
The area within 2 miles of South Whitley is covered by cropland (87%) and artificial surfaces (11%), within 10 miles by cropland (95%), and within 50 miles by cropland (90%).
This report illustrates the typical weather in South Whitley 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in South Whitley.
For each station, the records are corrected for the elevation difference between that station and South Whitley 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 South Whitley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between South Whitley and a given station.
The stations contributing to this reconstruction are: Warsaw Municipal Airport (39%, 28 kilometers, northwest); Fort Wayne International Airport (25%, 38 kilometers, east); Smith Field (15%, 53 kilometers, northeast); Grissom Air Force Base / Peru (11%, 65 kilometers, southwest); and Marion Municipal Airport (10%, 67 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .