Average Weather in September in Leland Michigan, United States
In Leland, the month of September is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 10°F, from 72°F to 62°F over the course of the month, and rarely exceeding 80°F or dropping below 51°F.
Daily low temperatures decrease by 9°F, from 58°F to 49°F, rarely falling below 40°F or exceeding 67°F.
For reference, on July 25, the hottest day of the year, temperatures in Leland typically range from 61°F to 76°F, while on February 3, the coldest day of the year, they range from 19°F to 29°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 Leland experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 35% to 42%.
The clearest day of the month is September 2, with clear, mostly clear, or partly cloudy conditions 65% of the time.
For reference, on January 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on August 3, 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 Leland, the chance of a wet day over the course of September is gradually increasing, starting the month at 30% and ending it at 34%.
For reference, the year's highest daily chance of a wet day is 36% on September 22, and its lowest chance is 16% on February 2.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Leland is gradually increasing, starting the month at 2.9 inches, when it rarely exceeds 4.5 inches or falls below 1.4 inches, and ending the month at 3.2 inches, when it rarely exceeds 4.9 inches or falls below 1.5 inches.
The highest average 31-day accumulation is 3.2 inches on September 22.
Average Monthly Rainfall in September
Over the course of September in Leland, 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, 30 minutes, implying an average daily decrease of 3 minutes, 5 seconds, and weekly decrease of 21 minutes, 38 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 Leland is 7:05 AM on September 1 and the latest sunrise is 35 minutes later at 7:40 AM on September 30.
The latest sunset is 8:19 PM on September 1 and the earliest sunset is 55 minutes earlier at 7:24 PM on September 30.
Daylight saving time is observed in Leland 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 5:56 AM and sets 15 hours, 37 minutes later, at 9:33 PM, while on December 21, the shortest day of the year, it rises at 8:18 AM and sets 8 hours, 46 minutes later, at 5:04 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Leland is rapidly decreasing during September, falling from 14% to 1% over the course of the month.
For reference, on August 1, the muggiest day of the year, there are muggy conditions 20% 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 September
The average hourly wind speed in Leland is rapidly increasing during September, increasing from 11.6 miles per hour to 13.7 miles per hour over the course of the month.
For reference, on January 4, the windiest day of the year, the daily average wind speed is 16.7 miles per hour, while on July 22, the calmest day of the year, the daily average wind speed is 9.7 miles per hour.
Average Wind Speed in September
Wind Direction in September
Leland 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 Leland 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 growing season in Leland typically lasts for 5.7 months (174 days), from around May 9 to around October 30, rarely starting before April 21 or after May 28, and rarely ending before October 14 or after November 15.
The month of September in Leland is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Leland is increasing during September, increasing by 321°F, from 1,614°F to 1,935°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Leland is rapidly decreasing during September, falling by 1.5 kWh, from 5.4 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 Leland are 45.023 deg latitude, -85.760 deg longitude, and 584 ft elevation.
The topography within 2 miles of Leland contains only modest variations in elevation, with a maximum elevation change of 289 feet and an average elevation above sea level of 597 feet. Within 10 miles contains only modest variations in elevation (492 feet). Within 50 miles contains significant variations in elevation (1,234 feet).
The area within 2 miles of Leland is covered by water (83%), within 10 miles by water (60%) and trees (22%), and within 50 miles by water (57%) and trees (29%).
This report illustrates the typical weather in Leland 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 Leland.
For each station, the records are corrected for the elevation difference between that station and Leland 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 Leland is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Leland and a given station.
The stations contributing to this reconstruction are: Cherry Capital Airport (35%, 34 kilometers, southeast); Antrim County Airport (24%, 44 kilometers, east); Charlevoix Municipal Airport (20%, 49 kilometers, northeast); Frankfort City-Benzie County Airport (17%, 56 kilometers, southwest); and Delta County Airport (4.7%, 130 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .