Average Weather in July in Signal Mountain Tennessee, United States
Daily high temperatures are around 86°F, rarely falling below 79°F or exceeding 93°F. The highest daily average high temperature is 87°F on July 23.
Daily low temperatures are around 68°F, rarely falling below 61°F or exceeding 72°F. The highest daily average low temperature is 68°F on July 24.
For reference, on July 22, the hottest day of the year, temperatures in Signal Mountain typically range from 68°F to 87°F, while on January 25, the coldest day of the year, they range from 30°F to 48°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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 July
The month of July in Signal Mountain experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 43% to 37%.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 63% of the time.
For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, 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 July
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Signal Mountain, the chance of a wet day over the course of July is decreasing, starting the month at 43% 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 21% on October 16.
Probability of Precipitation in July
The average sliding 31-day rainfall during July in Signal Mountain is decreasing, starting the month at 3.5 inches, when it rarely exceeds 6.4 inches or falls below 1.5 inches, and ending the month at 3.0 inches, when it rarely exceeds 5.0 inches or falls below 1.4 inches.
The highest average 31-day accumulation is 3.5 inches on July 2.
Average Monthly Rainfall in July
Over the course of July in Signal Mountain, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 33 minutes, implying an average daily decrease of 1 minute, 7 seconds, and weekly decrease of 7 minutes, 49 seconds.
The shortest day of the month is July 31, with 13 hours, 55 minutes of daylight and the longest day is July 1, with 14 hours, 29 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Signal Mountain is 6:30 AM on July 1 and the latest sunrise is 19 minutes later at 6:49 AM on July 31.
The latest sunset is 8:59 PM on July 1 and the earliest sunset is 14 minutes earlier at 8:45 PM on July 31.
Daylight saving time is observed in Signal Mountain during 2018, but it neither starts nor ends during July, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:27 AM and sets 14 hours, 32 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, 47 minutes later, at 5:33 PM.
Sunrise & Sunset with Twilight in July
The chance that a given day will be muggy in Signal Mountain is rapidly increasing during July, rising from 70% to 80% over the course of the month.
The highest chance of a muggy day during July is 83% on July 24.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 83% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Signal Mountain is essentially constant during July, remaining within 0.1 miles per hour of 3.4 miles per hour throughout.
For reference, on February 26, the windiest day of the year, the daily average wind speed is 5.7 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 July
Wind Direction in July
The growing season in Signal Mountain typically lasts for 7.0 months (214 days), from around March 31 to around October 31, rarely starting before March 10 or after April 21, and rarely ending before October 14 or after November 19.
The month of July in Signal Mountain is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in July
The average accumulated growing degree days in Signal Mountain are rapidly increasing during July, increasing by 777°F, from 1,714°F to 2,491°F, over the course of the month.
Growing Degree Days in July
The average daily incident shortwave solar energy in Signal Mountain is essentially constant during July, remaining within 0.1 kWh of 6.6 kWh throughout.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Signal Mountain are 35.123 deg latitude, -85.344 deg longitude, and 1,322 ft elevation.
The topography within 2 miles of Signal Mountain contains very significant variations in elevation, with a maximum elevation change of 1,355 feet and an average elevation above sea level of 1,366 feet. Within 10 miles also contains very significant variations in elevation (1,821 feet). Within 50 miles contains very significant variations in elevation (3,720 feet).
The area within 2 miles of Signal Mountain is covered by trees (88%), within 10 miles by trees (68%) and artificial surfaces (22%), and within 50 miles by trees (66%) and cropland (28%).
This report illustrates the typical weather in Signal Mountain 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 Signal Mountain.
For each station, the records are corrected for the elevation difference between that station and Signal Mountain 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 Signal Mountain is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Signal Mountain and a given station.
The stations contributing to this reconstruction are: Lovell Field (57%, 16 kilometers, southeast); Winchester Municipal Airport (14%, 66 kilometers, west); Scottsboro Municipal Airport Word Field (11%, 77 kilometers, southwest); Isbell Field (10%, 80 kilometers, southwest); and Crossville Memorial Airport (8%, 95 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .