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September Weather in Edmonton Alberta, Canada

Daily high temperatures decrease by 10°F, from 68°F to 59°F, rarely falling below 45°F or exceeding 80°F.

Daily low temperatures decrease by 9°F, from 48°F to 39°F, rarely falling below 30°F or exceeding 55°F.

For reference, on July 24, the hottest day of the year, temperatures in Edmonton typically range from 55°F to 75°F, while on January 1, the coldest day of the year, they range from 6°F to 20°F.

Average High and Low Temperature in September in Edmonton

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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 in Edmonton

Average Hourly Temperature in September in EdmontonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOctvery coldcoldcoolcomfortablefreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Nizhniy Novgorod, Russia (4,744 miles away) is the far-away foreign place with temperatures most similar to Edmonton (view comparison).

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The month of September in Edmonton experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the month.

The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 54% of the time.

For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on August 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 61%.

Cloud Cover Categories in September in Edmonton

Cloud Cover Categories in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 154%Sep 154%Sep 3051%Sep 3051%Sep 1153%Sep 1153%Sep 2152%Sep 2152%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Edmonton, the chance of a wet day over the course of September is rapidly decreasing, starting the month at 20% and ending it at 12%.

For reference, the year's highest daily chance of a wet day is 35% on July 3, and its lowest chance is 5% on February 13.

Probability of Precipitation in September in Edmonton

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during September in Edmonton is decreasing, starting the month at 1.6 inches, when it rarely exceeds 2.8 inches or falls below 0.5 inches, and ending the month at 0.8 inches, when it rarely exceeds 1.6 inches or falls below 0.2 inches.

Average Monthly Rainfall in September in Edmonton

Average Monthly Rainfall in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 in4.0 in4.0 inAugOctSep 11.6 inSep 11.6 inSep 300.8 inSep 300.8 inSep 111.3 inSep 111.3 inSep 211.0 inSep 211.0 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of September in Edmonton, 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, 2 minutes, implying an average daily decrease of 4 minutes, 12 seconds, and weekly decrease of 29 minutes, 21 seconds.

The shortest day of the month is September 30, with 11 hours, 36 minutes of daylight and the longest day is September 1, with 13 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in September in Edmonton

Hours of Daylight and Twilight in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 14 minSep 2212 hr, 14 minnightnightdaydaySep 113 hr, 38 minSep 113 hr, 38 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Edmonton is 6:44 AM on September 1 and the latest sunrise is 51 minutes later at 7:35 AM on September 30.

The latest sunset is 8:21 PM on September 1 and the earliest sunset is 1 hour, 11 minutes earlier at 7:11 PM on September 30.

Daylight saving time is observed in Edmonton during 2024, but it neither starts nor ends during September, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:04 AM and sets 17 hours, 3 minutes later, at 10:07 PM, while on December 21, the shortest day of the year, it rises at 8:48 AM and sets 7 hours, 28 minutes later, at 4:16 PM.

Sunrise & Sunset with Twilight in September in Edmonton

Sunrise & Sunset with Twilight in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct6:44 AM6:44 AMSep 18:21 PMSep 18:21 PM7:35 AM7:35 AMSep 307:11 PMSep 307:11 PM7:01 AM7:01 AMSep 117:57 PMSep 117:57 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of September. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in September in Edmonton

Solar Elevation and Azimuth in September in EdmontonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOct00101020202030405000010102020303040
northeastsouthwest
Solar elevation and azimuth over the course of September 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for September 2024. 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 in Edmonton

Moon Rise, Set & Phases in September in EdmontonSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 45:14 AMAug 45:14 AMAug 1912:26 PMAug 1912:26 PMSep 27:56 PMSep 27:56 PMSep 178:35 PMSep 178:35 PMOct 212:50 PMOct 212:50 PMOct 175:27 AMOct 175:27 AM5:40 AM5:40 AM10:00 PM10:00 PM9:00 PM9:00 PM5:48 AM5:48 AM6:03 AM6:03 AM8:29 PM8:29 PM7:43 PM7:43 PM7:57 AM7:57 AM7:30 AM7:30 AM7:01 PM7:01 PM6:10 PM6:10 PM8:29 AM8:29 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
2%4:45 AMENE8:20 PMWNW-12:40 PMS249,295 mi
2
0%6:03 AMENE8:29 PMWNW-1:21 PMS250,664 mi
3
1%7:17 AMENE8:36 PMW-2:01 PMS251,670 mi
4
3%8:29 AME8:43 PMW-2:39 PMS252,267 mi
5
7%9:41 AME8:50 PMWSW-3:18 PMS252,389 mi
6
13%10:54 AMESE8:59 PMWSW-3:57 PMS251,961 mi
7
20%12:09 PMESE9:09 PMWSW-4:39 PMS250,910 mi
8
28%1:26 PMSE9:22 PMSW-5:24 PMS249,181 mi
9
38%2:45 PMSE9:43 PMSW-6:14 PMS246,755 mi
10
48%4:02 PMSE10:14 PMSW-7:08 PMS243,671 mi
11
50%5:10 PMSE11:01 PMSW-8:06 PMS240,040 mi
12
69%6:03 PMSE--9:06 PMS236,060 mi
13
79%-12:09 AMSW6:39 PMSE10:07 PMS232,015 mi
14
88%-1:35 AMSW7:03 PMSE11:06 PMS228,251 mi
15
92%-3:09 AMSW7:20 PMESE--
16
95%-4:46 AMWSW7:32 PMESE12:02 AMS225,132 mi
17
100%-6:22 AMWSW7:43 PME12:55 AMS222,985 mi
18
100%-7:57 AMW7:53 PME1:46 AMS222,041 mi
19
98%-9:33 AMWNW8:04 PMENE2:37 AMS222,392 mi
20
92%-11:09 AMWNW8:17 PMENE3:29 AMS223,974 mi
21
84%-12:46 PMNW8:35 PMNE4:22 AMS226,579 mi
22
75%-2:20 PMNW9:02 PMNE5:18 AMS229,906 mi
23
64%-3:43 PMNW9:43 PMNE6:16 AMS233,616 mi
24
50%-4:47 PMNW10:41 PMNE7:14 AMS237,385 mi
25
42%-5:31 PMNW11:53 PMNE8:11 AMS240,950 mi
26
31%-5:59 PMNW-9:04 AMS244,128 mi
27
22%1:13 AMNE6:17 PMNW-9:53 AMS246,813 mi
28
14%2:33 AMNE6:29 PMWNW-10:39 AMS248,967 mi
29
8%3:51 AMENE6:39 PMWNW-11:21 AMS250,591 mi
30
4%5:05 AMENE6:47 PMW-12:01 PMS251,716 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Edmonton is essentially constant during September, remaining around 0% throughout.

For reference, on July 31, the muggiest day of the year, there are muggy conditions 1% of the time, while on September 15, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September in Edmonton

Humidity Comfort Levels in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 10%Sep 10%Sep 300%Sep 300%Sep 110%Sep 110%Sep 210%Sep 210%humidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Edmonton is gradually increasing during September, increasing from 8.6 miles per hour to 9.3 miles per hour over the course of the month.

For reference, on January 30, the windiest day of the year, the daily average wind speed is 10.4 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 7.9 miles per hour.

Average Wind Speed in September in Edmonton

Average Wind Speed in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphAugOctSep 18.6 mphSep 18.6 mphSep 309.3 mphSep 309.3 mphSep 119.1 mphSep 119.1 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Edmonton throughout September is predominantly from the west, with a peak proportion of 45% on September 30.

Wind Direction in September in Edmonton

Wind Direction in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctwestsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Edmonton typically lasts for 4.5 months (140 days), from around May 6 to around September 23, rarely starting before April 17 or after May 23, and rarely ending before September 3 or after October 12.

During September in Edmonton, the chance that a given day is within the growing season is very rapidly decreasing falling from 93% to 31% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in September in Edmonton

Time Spent in Various Temperature Bands and the Growing Season in September in Edmontongrowing seasonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct93%Sep 193%Sep 1Sep 3031%Sep 3031%78%Sep 1178%Sep 1155%Sep 2155%Sep 21Oct 1210%Oct 1210%freezingvery coldcoldcoolcomfortablewarmfrigid
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Edmonton are gradually increasing during September, increasing by 159°F, from 1,332°F to 1,491°F, over the course of the month.

Growing Degree Days in September in Edmonton

Growing Degree Days in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930301,200°F1,200°F1,300°F1,300°F1,400°F1,400°F1,500°F1,500°F1,600°F1,600°F1,700°F1,700°FAugOctSep 11,332°FSep 11,332°FSep 301,491°FSep 301,491°FSep 111,404°FSep 111,404°F
The average growing degree days accumulated over the course of September, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Edmonton is rapidly decreasing during September, falling by 1.5 kWh, from 4.6 kWh to 3.1 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in September in Edmonton

Average Daily Incident Shortwave Solar Energy in September in EdmontonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhAugOctSep 14.6 kWhSep 14.6 kWhSep 303.1 kWhSep 303.1 kWhSep 114.1 kWhSep 114.1 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Edmonton are 53.550 deg latitude, -113.469 deg longitude, and 2,001 ft elevation.

The topography within 2 miles of Edmonton contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 2,147 feet. Within 10 miles contains only modest variations in elevation (548 feet). Within 50 miles contains significant variations in elevation (1,266 feet).

The area within 2 miles of Edmonton is covered by artificial surfaces (92%), within 10 miles by cropland (52%) and artificial surfaces (39%), and within 50 miles by cropland (82%) and trees (11%).

This report illustrates the typical weather in Edmonton, 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 Edmonton.

For each station, the records are corrected for the elevation difference between that station and Edmonton 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 Edmonton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Edmonton and a given station.

The stations contributing to this reconstruction are:

Sources mapCXEC, 69%2 mi, 200 ftCZOL, 23%8 mi, 180 ftCYEG, 8%17 mi, 371 ft© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of Edmonton and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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