Average Weather in September in Monterey Tennessee, United States
In Monterey, the month of September is characterized by falling daily high temperatures, with daily highs decreasing by 9°F, from 81°F to 72°F over the course of the month, and rarely exceeding 88°F or dropping below 62°F.
Daily low temperatures decrease by 10°F, from 61°F to 51°F, rarely falling below 39°F or exceeding 68°F.
For reference, on July 21, the hottest day of the year, temperatures in Monterey typically range from 65°F to 84°F, while on January 29, the coldest day of the year, they range from 27°F to 44°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
The month of September in Monterey experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 35% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 33% on September 21.
The clearest day of the month is September 21, 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 59%, 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 September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Monterey, the chance of a wet day over the course of September is decreasing, starting the month at 29% and ending it at 25%.
For reference, the year's highest daily chance of a wet day is 45% on July 8, and its lowest chance is 23% on October 15.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Monterey is essentially constant, remaining about 3.1 inches throughout, and rarely exceeding 6.2 inches or falling below 1.1 inches.
Average Monthly Rainfall in September
Over the course of September in Monterey, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 5 minutes, implying an average daily decrease of 2 minutes, 15 seconds, and weekly decrease of 15 minutes, 47 seconds.
The shortest day of the month is September 30, with 11 hours, 50 minutes of daylight and the longest day is September 1, with 12 hours, 56 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Monterey is 6:12 AM on September 1 and the latest sunrise is 23 minutes later at 6:35 AM on September 30.
The latest sunset is 7:08 PM on September 1 and the earliest sunset is 43 minutes earlier at 6:25 PM on September 30.
Daylight saving time is observed in Monterey during 2017, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:24 AM and sets 14 hours, 37 minutes later, at 8:01 PM, while on December 21, the shortest day of the year, it rises at 6:48 AM and sets 9 hours, 42 minutes later, at 4:30 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Monterey is very rapidly decreasing during September, falling from 49% to 11% over the course of the month.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 76% of the time, while on November 30, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
The average hourly wind speed in Monterey is gradually increasing during September, increasing from 3.5 miles per hour to 4.1 miles per hour over the course of the month.
For reference, on February 25, the windiest day of the year, the daily average wind speed is 6.0 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 September
Wind Direction in September
The growing season in Monterey typically lasts for 6.1 months (185 days), from around April 15 to around October 17, rarely starting before March 27 or after May 6, and rarely ending before September 28 or after November 4.
The month of September in Monterey is more likely than not fully within the growing season, with the chance that a given day is in the growing season decreasing from 100% to 88% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Monterey is rapidly increasing during September, increasing by 473°F, from 2,884°F to 3,357°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Monterey is gradually decreasing during September, falling by 0.9 kWh, from 5.8 kWh to 4.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Monterey are 36.148 deg latitude, -85.268 deg longitude, and 1,801 ft elevation.
The topography within 2 miles of Monterey contains very significant variations in elevation, with a maximum elevation change of 919 feet and an average elevation above sea level of 1,741 feet. Within 10 miles also contains very significant variations in elevation (1,194 feet). Within 50 miles contains very significant variations in elevation (2,858 feet).
The area within 2 miles of Monterey is covered by trees (78%) and cropland (14%), within 10 miles by trees (85%) and cropland (14%), and within 50 miles by trees (70%) and cropland (26%).
This report illustrates the typical weather in Monterey 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 Monterey.
For each station, the records are corrected for the elevation difference between that station and Monterey 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 Monterey is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Monterey and a given station.
The stations contributing to this reconstruction are: Upper Cumberland Regional Airport (36%, 26 kilometers, southwest); Crossville Memorial Airport (50%, 28 kilometers, southeast); Wayne County Airport (9%, 87 kilometers, northeast); and Glasgow Municipal Airport (6%, 116 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .