Average Weather in September in Chetwynd Canada
In Chetwynd, the month of September is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 10°F, from 65°F to 55°F over the course of the month, and rarely exceeding 76°F or dropping below 43°F.
Daily low temperatures decrease by 7°F, from 46°F to 39°F, rarely falling below 29°F or exceeding 53°F.
For reference, on July 30, the hottest day of the year, temperatures in Chetwynd typically range from 51°F to 73°F, while on January 10, the coldest day of the year, they range from 8°F to 20°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 Chetwynd experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 52% to 58%.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on February 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 72%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 56%.
Cloud Cover in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Chetwynd, the chance of a wet day over the course of September is decreasing, starting the month at 24% and ending it at 20%.
For reference, the year's highest daily chance of a wet day is 31% on June 21, and its lowest chance is 13% on February 15.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Chetwynd is gradually decreasing, starting the month at 1.6 inches, when it rarely exceeds 3.4 inches or falls below 0.6 inches, and ending the month at 1.1 inches, when it rarely exceeds 2.1 inches or falls below 0.5 inches.
Average Monthly Rainfall in September
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during September in Chetwynd is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in September
Over the course of September in Chetwynd, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 2 hours, 12 minutes, implying an average daily decrease of 4 minutes, 33 seconds, and weekly decrease of 31 minutes, 49 seconds.
The shortest day of the month is September 30, with 11 hours, 35 minutes of daylight and the longest day is September 1, with 13 hours, 47 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Chetwynd is 6:12 AM on September 1 and the latest sunrise is 56 minutes later at 7:08 AM on September 30.
The latest sunset is 7:59 PM on September 1 and the earliest sunset is 1 hour, 16 minutes earlier at 6:43 PM on September 30.
Daylight saving time is not observed in Chetwynd during 2017.
For reference, on June 21, the longest day of the year, the Sun rises at 4:22 AM and sets 17 hours, 33 minutes later, at 9:54 PM, while on December 21, the shortest day of the year, it rises at 9:34 AM and sets 7 hours, 1 minute later, at 4:35 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Chetwynd is essentially constant during September, remaining around 0% throughout.
Humidity Comfort Levels in September
The average hourly wind speed in Chetwynd is essentially constant during September, remaining within 0.1 miles per hour of 2.5 miles per hour throughout.
For reference, on December 10, the windiest day of the year, the daily average wind speed is 3.2 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 2.2 miles per hour.
Average Wind Speed in September
Wind Direction in September
The average daily incident shortwave solar energy in Chetwynd is rapidly decreasing during September, falling by 1.6 kWh, from 4.3 kWh to 2.7 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 Chetwynd are 55.700 deg latitude, -121.636 deg longitude, and 2,339 ft elevation.
The topography within 2 miles of Chetwynd contains very significant variations in elevation, with a maximum elevation change of 1,493 feet and an average elevation above sea level of 2,301 feet. Within 10 miles contains very significant variations in elevation (2,661 feet). Within 50 miles contains large variations in elevation (5,623 feet).
The area within 2 miles of Chetwynd is covered by trees (73%), sparse vegetation (13%), and cropland (10%), within 10 miles by trees (90%), and within 50 miles by trees (82%).
This report illustrates the typical weather in Chetwynd 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 Chetwynd.
For each station, the records are corrected for the elevation difference between that station and Chetwynd 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 Chetwynd is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Chetwynd and a given station.
The stations contributing to this reconstruction are: Fort St. John Airport (48%, 82 kilometers, northeast); Mackenzie Airport (33%, 104 kilometers, southwest); and Beaverlodge (19%, 152 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .