Average Weather in May in Harrison Tennessee, United States
In Harrison, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 7°F, from 76°F to 83°F over the course of the month, and rarely exceeding 89°F or dropping below 65°F.
Daily low temperatures increase by 9°F, from 54°F to 63°F, rarely falling below 44°F or exceeding 69°F.
For reference, on July 21, the hottest day of the year, temperatures in Harrison typically range from 71°F to 89°F, while on January 26, the coldest day of the year, they range from 32°F to 50°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
The month of May in Harrison experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 45% throughout the month.
The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 57% of the time.
For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on September 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover Categories in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Harrison, the chance of a wet day over the course of May is rapidly increasing, starting the month at 32% and ending it at 38%.
For reference, the year's highest daily chance of a wet day is 43% on July 9, and its lowest chance is 20% on October 16.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Harrison is decreasing, starting the month at 4.0 inches, when it rarely exceeds 7.2 inches or falls below 1.6 inches, and ending the month at 3.3 inches, when it rarely exceeds 5.4 inches or falls below 1.5 inches.
Average Monthly Rainfall in May
Over the course of May in Harrison, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 44 minutes, implying an average daily increase of 1 minute, 28 seconds, and weekly increase of 10 minutes, 19 seconds.
The shortest day of the month is May 1, with 13 hours, 37 minutes of daylight and the longest day is May 31, with 14 hours, 21 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Harrison is 6:49 AM on May 1 and the earliest sunrise is 22 minutes earlier at 6:27 AM on May 31.
The earliest sunset is 8:26 PM on May 1 and the latest sunset is 23 minutes later at 8:49 PM on May 31.
Daylight saving time is observed in Harrison during 2017, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:26 AM and sets 14 hours, 31 minutes later, at 8:58 PM, while on December 21, the shortest day of the year, it rises at 7:45 AM and sets 9 hours, 48 minutes later, at 5:32 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Harrison is very rapidly increasing during May, rising from 5% to 38% 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 January 23, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in May
The average hourly wind speed in Harrison is gradually decreasing during May, decreasing from 4.7 miles per hour to 3.9 miles per hour over the course of the month.
For reference, on February 26, the windiest day of the year, the daily average wind speed is 5.6 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 3.2 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Harrison typically lasts for 7.4 months (228 days), from around March 26 to around November 9, rarely starting before March 5 or after April 15, and rarely ending before October 22 or after November 27.
The month of May in Harrison is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Harrison is rapidly increasing during May, increasing by 546°F, from 632°F to 1,178°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Harrison is essentially constant during May, remaining within 0.2 kWh of 6.5 kWh throughout.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Harrison are 35.114 deg latitude, -85.138 deg longitude, and 764 ft elevation.
The topography within 2 miles of Harrison contains only modest variations in elevation, with a maximum elevation change of 374 feet and an average elevation above sea level of 785 feet. Within 10 miles contains only modest variations in elevation (1,378 feet). Within 50 miles contains very significant variations in elevation (3,720 feet).
The area within 2 miles of Harrison is covered by trees (67%) and artificial surfaces (12%), within 10 miles by trees (49%) and artificial surfaces (27%), and within 50 miles by trees (70%) and cropland (23%).
This report illustrates the typical weather in Harrison 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 Harrison.
For each station, the records are corrected for the elevation difference between that station and Harrison 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 Harrison is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Harrison and a given station.
The stations contributing to this reconstruction are: Lovell Field (92%, 11 kilometers, southwest); Crossville Memorial Airport (3.5%, 93 kilometers, north); Western Carolina Regional Airport (2.6%, 116 kilometers, east); and McGhee Tyson Airport (2.3%, 131 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .