Average Weather in September in Chamberlain South Dakota, United States
Daily high temperatures decrease by 13°F, from 84°F to 71°F, rarely falling below 56°F or exceeding 95°F.
Daily low temperatures decrease by 13°F, from 60°F to 47°F, rarely falling below 35°F or exceeding 69°F.
For reference, on July 20, the hottest day of the year, temperatures in Chamberlain typically range from 65°F to 89°F, while on January 2, the coldest day of the year, they range from 13°F to 31°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 Chamberlain experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 29% to 35%.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 71% of the time.
For reference, on March 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on July 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.
Cloud Cover Categories in September
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 Chamberlain, the chance of a wet day over the course of September is rapidly decreasing, starting the month at 23% and ending it at 16%.
For reference, the year's highest daily chance of a wet day is 40% on June 7, and its lowest chance is 4% on January 25.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Chamberlain is essentially constant, remaining about 1.8 inches throughout, and rarely exceeding 3.9 inches or falling below 0.3 inches.
Average Monthly Rainfall in September
Over the course of September in Chamberlain, 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, 26 minutes, implying an average daily decrease of 2 minutes, 58 seconds, and weekly decrease of 20 minutes, 44 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, 11 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Chamberlain is 7:01 AM on September 1 and the latest sunrise is 33 minutes later at 7:34 AM on September 30.
The latest sunset is 8:12 PM on September 1 and the earliest sunset is 53 minutes earlier at 7:19 PM on September 30.
Daylight saving time is observed in Chamberlain during 2021, 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 5:55 AM and sets 15 hours, 28 minutes later, at 9:23 PM, while on December 21, the shortest day of the year, it rises at 8:08 AM and sets 8 hours, 55 minutes later, at 5:02 PM.
Sunrise & Sunset with Twilight in September
The figure below presents a compact representation of key lunar data for September 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in September
The chance that a given day will be muggy in Chamberlain is rapidly decreasing during September, falling from 14% to 0% over the course of the month.
For reference, on July 25, the muggiest day of the year, there are muggy conditions 30% 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Chamberlain is gradually increasing during September, increasing from 10.6 miles per hour to 11.4 miles per hour over the course of the month.
For reference, on April 8, the windiest day of the year, the daily average wind speed is 12.5 miles per hour, while on July 26, the calmest day of the year, the daily average wind speed is 9.5 miles per hour.
Average Wind Speed in September
The hourly average wind direction in Chamberlain throughout September is predominantly from the south, with a peak proportion of 42% on September 2.
Wind Direction in September
The growing season in Chamberlain typically lasts for 5.4 months (164 days), from around April 28 to around October 8, rarely starting before April 7 or after May 18, and rarely ending before September 20 or after October 28.
The month of September in Chamberlain is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly decreasing from 100% to 71% 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 Chamberlain are increasing during September, increasing by 427°F, from 2,572°F to 2,999°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Chamberlain is decreasing during September, falling by 1.4 kWh, from 5.7 kWh to 4.3 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 Chamberlain are 43.811 deg latitude, -99.331 deg longitude, and 1,404 ft elevation.
The topography within 2 miles of Chamberlain contains only modest variations in elevation, with a maximum elevation change of 387 feet and an average elevation above sea level of 1,480 feet. Within 10 miles contains only modest variations in elevation (512 feet). Within 50 miles contains significant variations in elevation (1,191 feet).
The area within 2 miles of Chamberlain is covered by grassland (58%) and water (32%), within 10 miles by grassland (60%) and cropland (29%), and within 50 miles by grassland (69%) and cropland (28%).
This report illustrates the typical weather in Chamberlain, 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 Chamberlain.
For each station, the records are corrected for the elevation difference between that station and Chamberlain 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 Chamberlain is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Chamberlain and a given station.
The stations contributing to this reconstruction are: Chamberlain, Chamberlain Municipal Airport (94%, 5.0 kilometers, south); Pierre Municipal Airport (3.2%, 99 kilometers, northwest); and Huron Regional Airport (2.7%, 110 kilometers, northeast).
Time zones for airports and weather stations are provided by AskGeo.com .