Average Weather in September in Mancelona Michigan, United States
In Mancelona, the month of September is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 11°F, from 73°F to 62°F over the course of the month, and rarely exceeding 82°F or dropping below 50°F.
Daily low temperatures decrease by 10°F, from 53°F to 43°F, rarely falling below 32°F or exceeding 64°F.
For reference, on July 19, the hottest day of the year, temperatures in Mancelona typically range from 57°F to 79°F, while on January 29, the coldest day of the year, they range from 11°F to 25°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 Mancelona experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 36% to 44%.
The clearest day of the month is September 2, with clear, mostly clear, or partly cloudy conditions 64% of the time.
For reference, on January 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 78%, while on August 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mancelona, the chance of a wet day over the course of September is essentially constant, remaining around 34% throughout.
For reference, the year's highest daily chance of a wet day is 36% on September 22, and its lowest chance is 15% on February 4.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Mancelona is essentially constant, remaining about 3.0 inches throughout, and rarely exceeding 4.9 inches or falling below 1.4 inches.
The highest average 31-day accumulation is 3.2 inches on September 21.
Average Monthly Rainfall in September
Over the course of September in Mancelona, 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, 29 minutes, implying an average daily decrease of 3 minutes, 5 seconds, and weekly decrease of 21 minutes, 32 seconds.
The shortest day of the month is September 30, with 11 hours, 45 minutes of daylight and the longest day is September 1, with 13 hours, 14 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Mancelona is 7:02 AM on September 1 and the latest sunrise is 35 minutes later at 7:37 AM on September 30.
The latest sunset is 8:16 PM on September 1 and the earliest sunset is 55 minutes earlier at 7:22 PM on September 30.
Daylight saving time is observed in Mancelona 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 5:53 AM and sets 15 hours, 36 minutes later, at 9:30 PM, while on December 21, the shortest day of the year, it rises at 8:15 AM and sets 8 hours, 47 minutes later, at 5:01 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Mancelona is decreasing during September, falling from 9% to 1% over the course of the month.
For reference, on July 30, the muggiest day of the year, there are muggy conditions 16% 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 September
The average hourly wind speed in Mancelona is gradually increasing during September, increasing from 4.8 miles per hour to 5.4 miles per hour over the course of the month.
For reference, on January 13, the windiest day of the year, the daily average wind speed is 6.7 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 4.3 miles per hour.
Average Wind Speed in September
Wind Direction in September
Mancelona 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 Mancelona is decreasing during September, falling by 7°F, from 67°F to 60°F, over the course of the month.
Average Water Temperature in September
The average daily incident shortwave solar energy in Mancelona is rapidly decreasing during September, falling by 1.5 kWh, from 5.3 kWh to 3.8 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 Mancelona are 44.902 deg latitude, -85.061 deg longitude, and 1,132 ft elevation.
The topography within 2 miles of Mancelona contains only modest variations in elevation, with a maximum elevation change of 315 feet and an average elevation above sea level of 1,158 feet. Within 10 miles contains only modest variations in elevation (883 feet). Within 50 miles also contains very significant variations in elevation (1,234 feet).
The area within 2 miles of Mancelona is covered by cropland (35%), grassland (28%), and trees (28%), within 10 miles by trees (77%), and within 50 miles by trees (56%) and water (22%).
This report illustrates the typical weather in Mancelona 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Mancelona.
For each station, the records are corrected for the elevation difference between that station and Mancelona 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 Mancelona is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mancelona and a given station.
The stations contributing to this reconstruction are: Antrim County Airport (50%, 15 kilometers, northwest); Gaylord Regional Airport (28%, 31 kilometers, northeast); and Grayling, Grayling Army Airfield (23%, 36 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .