September is one of the warmer months of the year in Fort McMurray, with average highs near 14.8°C and lows around 4.1°C (mean 9.5°C). It is about average for rainfall, averaging 54 mm of rainfall and 77% relative humidity across the period.
September is one of the warmer months of the year in Fort McMurray. Across 45 years of records, the warmest September in Fort McMurray was 2009 — when the month averaged 13.4°C — while the coldest was 2018 at 3.1°C. Typical September days reach 14.8°C with nights near 4.1°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Fort McMurray, averaging 54 mm of rainfall. The wettest September on record was 2003 with 141 mm, while the driest was 1995 at 15 mm.
Relative humidity in Fort McMurray during September averages 77%. The most humid September was 2020 at 86%, and the least humid was 1981 at 67%.
September receives about 3.1 kWh/m²/day of solar energy in Fort McMurray. The sunniest Septembers were 2011 and 2013 at 3.7 kWh/m²/day, and the cloudiest was 2004 at 2.6.
Average wind speed in Fort McMurray during September is 0.1 m/s. The windiest Septembers were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.6°C | 9.4°C | 9.3°C | 9.4°C | 11.1°C | +2.5°C |
| Avg High | 14.1°C | 14.8°C | 14.5°C | 14.7°C | 16.1°C | +2°C |
| Avg Low | 3.1°C | 3.9°C | 4.2°C | 4.1°C | 6.1°C | +3°C |
| Avg Rain | 45 mm | 55 mm | 58 mm | 56 mm | 54 mm | +10 mm |
September temperatures in Fort McMurray have risen by about 3.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -8.2°C (1992) to a record high of 30.4°C (2011).
Rainfall in September is about average for rainfall, averaging 54 mm, with a wettest year of 141 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.6°C per decade, narrowing the gap between day and night.
One of the best times to visit Fort McMurray
September is one of the best times to visit Fort McMurray. Expect days averaging 14.8°C and nights around 4.1°C (mean 9.5°C) — warmer than Fort McMurray's yearly average — with moderate rainfall (54 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.8°C | 13.1°C | 7.4°C | 24.9°C | 1.9°C | 38 mm | 77% | 0.1 m/s | 3.5 |
| 2024 | 16.4°C | 11.7°C | 7.0°C | 25.7°C | 0.7°C | 75 mm | 84% | 0.1 m/s | 3 |
| 2023 | 16.8°C | 11.4°C | 6.1°C | 21.7°C | 0.5°C | 21 mm | 80% | 0.1 m/s | 3.2 |
| 2022 | 16.8°C | 11.7°C | 6.6°C | 27.0°C | 0.9°C | 30 mm | 82% | 0.1 m/s | 3.3 |
| 2021 | 14.9°C | 10.3°C | 5.7°C | 20.6°C | -0.7°C | 93 mm | 86% | 0.1 m/s | 2.9 |
| 2020 | 13.1°C | 8.6°C | 4.0°C | 19.7°C | -3.8°C | 69 mm | 86% | 0.1 m/s | 2.9 |
| 2019 | 13.6°C | 9.2°C | 4.9°C | 19.4°C | -4.4°C | 51 mm | 85% | 0.1 m/s | 2.9 |
| 2018 ❄️ | 7.9°C | 3.1°C | -1.7°C | 14.7°C | -5.7°C | 38 mm | 79% | 0.1 m/s | 2.9 |
| 2017 | 15.9°C | 10.5°C | 5.1°C | 25.9°C | -0.5°C | 59 mm | 79% | 0.1 m/s | 3.2 |
| 2016 | 15.2°C | 10.1°C | 4.9°C | 21.3°C | -1.3°C | 72 mm | 79% | 0.1 m/s | 3 |
| 2015 | 13.9°C | 8.5°C | 3.1°C | 23.1°C | -4.2°C | 37 mm | 74% | 0.1 m/s | 2.9 |
| 2014 | 13.7°C | 8.6°C | 3.5°C | 25.0°C | -4.5°C | 71 mm | 80% | 0.1 m/s | 3 |
| 2013 | 18.1°C | 12.1°C | 6.0°C | 26.8°C | -1.2°C | 51 mm | 76% | 0.1 m/s | 3.7 |
| 2012 | 17.2°C | 11.6°C | 6.0°C | 22.9°C | 1.5°C | 86 mm | 75% | 0.1 m/s | 3.3 |
| 2011 | 18.7°C | 12.4°C | 6.1°C | 30.4°C | -2.5°C | 40 mm | 67% | 0.1 m/s | 3.7 |
| 2010 | 12.8°C | 8.0°C | 3.1°C | 21.6°C | -3.6°C | 53 mm | 83% | 0.1 m/s | 2.8 |
| 2009 🔥 | 19.0°C | 13.4°C | 7.9°C | 26.6°C | 0.6°C | 46 mm | 77% | 0.1 m/s | 3.2 |
| 2008 | 14.3°C | 8.9°C | 3.5°C | 21.9°C | -1.2°C | 41 mm | 79% | 0.1 m/s | 3 |
| 2007 | 12.3°C | 7.7°C | 3.1°C | 19.8°C | -3.4°C | 53 mm | 83% | 0.1 m/s | 2.9 |
| 2006 | 15.7°C | 10.5°C | 5.3°C | 28.5°C | -0.1°C | 39 mm | 78% | 0.1 m/s | 3.3 |
| 2005 | 13.5°C | 8.6°C | 3.7°C | 20.7°C | -1.8°C | 36 mm | 81% | 0.1 m/s | 3.1 |
| 2004 | 12.1°C | 7.3°C | 2.6°C | 18.6°C | -6.0°C | 79 mm | 82% | 0.1 m/s | 2.6 |
| 2003 🌧️ | 13.2°C | 8.2°C | 3.3°C | 26.7°C | -4.7°C | 141 mm | 83% | 0.1 m/s | 2.8 |
| 2002 | 13.9°C | 8.8°C | 3.6°C | 22.1°C | -5.8°C | 49 mm | 74% | 0.1 m/s | 3.2 |
| 2001 | 18.0°C | 11.8°C | 5.5°C | 26.5°C | 0.3°C | 38 mm | 71% | 0.1 m/s | 3.3 |
| 2000 | 13.3°C | 8.2°C | 3.0°C | 21.5°C | -5.7°C | 57 mm | 79% | 0.1 m/s | 2.7 |
| 1999 | 15.8°C | 9.8°C | 3.7°C | 23.7°C | -6.7°C | 31 mm | 68% | 0.1 m/s | 3.6 |
| 1998 | 15.8°C | 9.9°C | 4.0°C | 26.5°C | -3.8°C | 32 mm | 69% | 0.1 m/s | 3.3 |
| 1997 | 14.9°C | 10.2°C | 5.6°C | 23.5°C | -2.4°C | 112 mm | 85% | 0.1 m/s | 2.8 |
| 1996 | 12.3°C | 7.9°C | 3.5°C | 22.0°C | -6.2°C | 113 mm | 82% | 0.1 m/s | 2.8 |
| 1995 | 17.1°C | 10.8°C | 4.5°C | 25.9°C | -5.3°C | 15 mm | 70% | 0.1 m/s | 3.5 |
| 1994 | 18.2°C | 12.0°C | 5.7°C | 27.3°C | -1.3°C | 24 mm | 68% | 0.1 m/s | 3 |
| 1993 | 13.4°C | 8.1°C | 2.8°C | 21.6°C | -6.1°C | 51 mm | 76% | 0.1 m/s | 3.2 |
| 1992 | 9.9°C | 5.3°C | 0.6°C | 21.3°C | -8.2°C | 92 mm | 83% | 0.1 m/s | 2.8 |
| 1991 | 13.8°C | 8.6°C | 3.4°C | 19.1°C | -4.0°C | 51 mm | 76% | 0.1 m/s | 3 |
| 1990 | 16.7°C | 10.9°C | 5.1°C | 24.4°C | -0.1°C | 33 mm | 70% | 0.1 m/s | 3.2 |
| 1989 | 13.8°C | 8.5°C | 3.2°C | 20.7°C | -5.4°C | 95 mm | 80% | 0.1 m/s | 2.9 |
| 1988 | 14.3°C | 8.9°C | 3.5°C | 27.3°C | -2.9°C | 20 mm | 74% | 0.1 m/s | 3.4 |
| 1987 | 17.4°C | 11.6°C | 5.7°C | 25.6°C | 0.9°C | 44 mm | 74% | 0.1 m/s | 3.4 |
| 1986 | 13.3°C | 8.1°C | 3.0°C | 19.1°C | -3.9°C | 26 mm | 77% | 0.1 m/s | 3.1 |
| 1985 | 10.8°C | 5.6°C | 0.4°C | 19.8°C | -6.1°C | 55 mm | 77% | 0.1 m/s | 2.8 |
| 1984 | 11.8°C | 6.6°C | 1.3°C | 18.6°C | -5.1°C | 33 mm | 77% | 0.1 m/s | 2.8 |
| 1983 | 12.6°C | 7.7°C | 2.7°C | 20.2°C | -6.1°C | 72 mm | 77% | 0.1 m/s | — |
| 1982 | 15.5°C | 9.4°C | 3.3°C | 22.8°C | -4.0°C | 38 mm | 74% | 0.1 m/s | — |
| 1981 | 17.7°C | 11.3°C | 4.8°C | 29.3°C | -1.7°C | 18 mm | 67% | 0.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 14.8°C with lows near 4.1°C (mean 9.5°C), based on 45 years of NASA POWER data.
September averages 54 mm of rainfall in Fort McMurray, about average for rainfall. The wettest on record was 141 mm in 2003.
The hottest September reached 30.4°C in 2011. The coldest dipped to -8.2°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 3.5°C. Daytime highs moved from 13.7°C to 16.7°C and overnight lows from 2.5°C to 6.6°C over the same span.
September is one of the warmer months of the year in Fort McMurray and about average for rainfall, so plan for around 14.8°C daytime highs and 4.1°C at night.
Not quite — September is the 9th coolest month in Fort McMurray, averaging 9.5°C.
For September in Fort McMurray, pack warm layers and a jacket for chilly mornings, with typical highs of 14.8°C and lows of 4.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 77% — quite humid.
Average wind speed in September is 0.1 m/s. The windiest September on record averaged 0.1 m/s (1981).
The wettest September on record was 2003 with 141 mm. On average, September sees 54 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Fort McMurray behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
