Average Weather in August in Smithville Tennessee, United States
In Smithville, the month of August is characterized by gradually falling daily high temperatures, with daily highs decreasing by 2°F, from 88°F to 85°F over the course of the month, and rarely exceeding 94°F or dropping below 78°F.
Daily low temperatures decrease by 3°F, from 67°F to 63°F, rarely falling below 56°F or exceeding 72°F.
For reference, on July 21, the hottest day of the year, temperatures in Smithville typically range from 67°F to 88°F, while on January 23, the coldest day of the year, they range from 29°F to 47°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in Smithville experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 34% throughout the month.
The clearest day of the month is August 26, with clear, mostly clear, or partly cloudy conditions 67% of the time.
For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on September 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover Categories in August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Smithville, the chance of a wet day over the course of August is rapidly decreasing, starting the month at 37% and ending it at 30%.
For reference, the year's highest daily chance of a wet day is 44% on July 9, and its lowest chance is 22% on October 15.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Smithville is gradually decreasing, starting the month at 3.2 inches, when it rarely exceeds 5.3 inches or falls below 1.5 inches, and ending the month at 2.9 inches, when it rarely exceeds 5.3 inches or falls below 1.1 inches.
The lowest average 31-day accumulation is 2.8 inches on August 24.
Average Monthly Rainfall in August
Over the course of August in Smithville, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 59 minutes, implying an average daily decrease of 1 minute, 59 seconds, and weekly decrease of 13 minutes, 53 seconds.
The shortest day of the month is August 31, with 12 hours, 57 minutes of daylight and the longest day is August 1, with 13 hours, 57 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Smithville is 5:50 AM on August 1 and the latest sunrise is 24 minutes later at 6:14 AM on August 31.
The latest sunset is 7:47 PM on August 1 and the earliest sunset is 36 minutes earlier at 7:11 PM on August 31.
Daylight saving time is observed in Smithville during 2017, but it neither starts nor ends during August, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:27 AM and sets 14 hours, 36 minutes later, at 8:03 PM, while on December 21, the shortest day of the year, it rises at 6:50 AM and sets 9 hours, 43 minutes later, at 4:33 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in Smithville is rapidly decreasing during August, falling from 81% to 62% over the course of the month.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 85% of the time, while on February 8, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in August
The average hourly wind speed in Smithville is essentially constant during August, remaining within 0.1 miles per hour of 4.0 miles per hour throughout.
For reference, on February 25, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 3.8 miles per hour.
The lowest daily average wind speed during August is 3.8 miles per hour on August 1.
Average Wind Speed in August
Wind Direction in August
The growing season in Smithville typically lasts for 6.4 months (196 days), from around April 7 to around October 21, rarely starting before March 20 or after April 26, and rarely ending before October 3 or after November 9.
The month of August in Smithville is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in Smithville is rapidly increasing during August, increasing by 740°F, from 2,533°F to 3,272°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Smithville is gradually decreasing during August, falling by 0.7 kWh, from 6.5 kWh to 5.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Smithville are 35.961 deg latitude, -85.814 deg longitude, and 1,037 ft elevation.
The topography within 2 miles of Smithville contains only modest variations in elevation, with a maximum elevation change of 404 feet and an average elevation above sea level of 1,036 feet. Within 10 miles contains only modest variations in elevation (1,250 feet). Within 50 miles contains very significant variations in elevation (2,654 feet).
The area within 2 miles of Smithville is covered by cropland (79%) and trees (18%), within 10 miles by trees (58%) and cropland (33%), and within 50 miles by trees (56%) and cropland (39%).
This report illustrates the typical weather in Smithville 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Smithville.
For each station, the records are corrected for the elevation difference between that station and Smithville 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 Smithville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Smithville and a given station.
The stations contributing to this reconstruction are: Upper Cumberland Regional Airport (62%, 28 kilometers, northeast); Smyrna Airport (17%, 64 kilometers, west); Tullahoma Regional Airport/William Northern Field (14%, 76 kilometers, southwest); and Lovell Field (7%, 117 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .