September is one of the warmer months of the year in Saguenay, with average highs near 17.3°C and lows around 7.5°C (mean 12.4°C). It is a relatively wet time of year, averaging 90 mm of rainfall and 81% relative humidity across the period.
September is one of the warmer months of the year in Saguenay. Across 45 years of records, the warmest Septembers in Saguenay were 2023 and 2024 — when the month averaged 15.8°C — while the coldest was 1991 at 9.4°C. Typical September days reach 17.3°C with nights near 7.5°C. The long-term trend is warming, about 0.8°C per decade.
September is a relatively wet time of year in Saguenay, averaging 90 mm of rainfall. The wettest September on record was 2010 with 200 mm, while the driest was 2025 at 35 mm.
Relative humidity in Saguenay during September averages 81%. The most humid September was 1994 at 84%, and the least humid was 2022 at 77%.
September receives about 3.3 kWh/m²/day of solar energy in Saguenay. The sunniest September was 2022 at 3.9 kWh/m²/day, and the cloudiest was 1997 at 2.7.
Average wind speed in Saguenay during September is 1.6 m/s. The windiest September was 2007 at 1.9 m/s, while the calmest was 2023 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.2°C | 11.5°C | 12.7°C | 13.2°C | 13.9°C | +2.7°C |
| Avg High | 16.0°C | 16.5°C | 17.8°C | 18.0°C | 19.0°C | +3°C |
| Avg Low | 6.4°C | 6.6°C | 7.8°C | 8.4°C | 8.8°C | +2.4°C |
| Avg Rain | 85 mm | 89 mm | 100 mm | 98 mm | 71 mm | -13 mm |
September temperatures in Saguenay have risen by about 2.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -4.2°C (2000) to a record high of 30°C (2010).
Rainfall in September is a relatively wet time of year, averaging 90 mm, with a wettest year of 200 mm.
One of the best times to visit Saguenay
September is one of the best times to visit Saguenay. Expect days averaging 17.3°C and nights around 7.5°C (mean 12.4°C) — warmer than Saguenay's yearly average — with higher rainfall (90 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 | 13.4°C | 7.9°C | 25.6°C | 2.1°C | 35 mm | 77% | 1.4 m/s | 3.7 |
| 2024 | 21.0°C | 15.8°C | 10.6°C | 26.6°C | 4.8°C | 45 mm | 77% | 1.5 m/s | 3.7 |
| 2023 🔥 | 21.0°C | 15.8°C | 10.7°C | 29.8°C | 4.5°C | 70 mm | 80% | 1.1 m/s | 3.8 |
| 2022 | 18.9°C | 13.3°C | 7.8°C | 26.6°C | 2.5°C | 56 mm | 77% | 1.5 m/s | 3.9 |
| 2021 | 18.3°C | 13.5°C | 8.8°C | 24.8°C | 4.3°C | 89 mm | 80% | 1.5 m/s | 3.1 |
| 2020 | 16.2°C | 11.4°C | 6.7°C | 23.4°C | -1.2°C | 130 mm | 82% | 1.7 m/s | 3.1 |
| 2019 | 16.2°C | 11.6°C | 7.0°C | 23.2°C | 0.2°C | 119 mm | 82% | 1.5 m/s | 3.1 |
| 2018 | 18.4°C | 13.2°C | 8.0°C | 26.5°C | -2.1°C | 83 mm | 80% | 1.7 m/s | 3.6 |
| 2017 | 19.2°C | 14.7°C | 10.2°C | 28.2°C | 2.6°C | 78 mm | 83% | 1.3 m/s | 3.3 |
| 2016 | 18.7°C | 13.9°C | 9.0°C | 26.2°C | 1.1°C | 53 mm | 80% | 1.6 m/s | 3.4 |
| 2015 | 20.4°C | 15.4°C | 10.3°C | 27.3°C | 1.9°C | 66 mm | 81% | 1.5 m/s | 3.8 |
| 2014 | 16.8°C | 11.9°C | 7.0°C | 25.5°C | -1.7°C | 98 mm | 82% | 1.7 m/s | 3.1 |
| 2013 | 17.0°C | 12.3°C | 7.5°C | 23.7°C | 1.2°C | 89 mm | 82% | 1.7 m/s | 3.1 |
| 2012 | 18.2°C | 13.2°C | 8.2°C | 25.8°C | 1.8°C | 110 mm | 80% | 1.7 m/s | 3.3 |
| 2011 | 18.7°C | 13.6°C | 8.5°C | 24.0°C | 4.3°C | 82 mm | 83% | 1.5 m/s | 3.7 |
| 2010 🌧️ | 16.4°C | 12.4°C | 8.4°C | 30.0°C | 2.0°C | 200 mm | 81% | 1.6 m/s | 2.9 |
| 2009 | 17.6°C | 12.3°C | 7.1°C | 23.6°C | 0.5°C | 62 mm | 81% | 1.5 m/s | 3.7 |
| 2008 | 17.5°C | 12.5°C | 7.5°C | 27.9°C | -0.4°C | 95 mm | 83% | 1.4 m/s | 3 |
| 2007 | 17.9°C | 12.5°C | 7.2°C | 28.0°C | 2.3°C | 90 mm | 78% | 1.9 m/s | 3.5 |
| 2006 | 17.0°C | 12.1°C | 7.1°C | 23.9°C | 2.3°C | 185 mm | 80% | 1.4 m/s | 3.4 |
| 2005 | 18.0°C | 13.2°C | 8.5°C | 26.4°C | 3.0°C | 107 mm | 80% | 1.8 m/s | 3.3 |
| 2004 | 17.9°C | 12.6°C | 7.3°C | 24.5°C | 3.4°C | 100 mm | 82% | 1.6 m/s | 3.5 |
| 2003 | 19.5°C | 14.5°C | 9.6°C | 27.2°C | 5.4°C | 76 mm | 80% | 1.5 m/s | 3.4 |
| 2002 | 18.9°C | 13.9°C | 8.9°C | 29.1°C | 2.1°C | 98 mm | 79% | 1.6 m/s | 3.6 |
| 2001 | 17.9°C | 13.2°C | 8.5°C | 28.2°C | 2.4°C | 99 mm | 81% | 1.6 m/s | 3.4 |
| 2000 | 15.4°C | 10.6°C | 5.8°C | 24.5°C | -4.2°C | 91 mm | 80% | 1.7 m/s | 3 |
| 1999 | 20.4°C | 15.4°C | 10.4°C | 29.2°C | 3.4°C | 107 mm | 81% | 1.5 m/s | 3.3 |
| 1998 | 16.6°C | 12.1°C | 7.6°C | 21.2°C | 1.1°C | 134 mm | 81% | 1.7 m/s | 3.1 |
| 1997 | 16.1°C | 11.6°C | 7.2°C | 23.8°C | 0.8°C | 80 mm | 82% | 1.7 m/s | 2.7 |
| 1996 | 17.6°C | 12.7°C | 7.8°C | 26.1°C | 0.1°C | 95 mm | 79% | 1.4 m/s | 3.4 |
| 1995 | 15.3°C | 9.8°C | 4.2°C | 22.4°C | -0.2°C | 63 mm | 77% | 1.7 m/s | 3.4 |
| 1994 | 16.5°C | 11.4°C | 6.4°C | 22.7°C | 1.4°C | 75 mm | 84% | 1.4 m/s | 3.3 |
| 1993 | 15.3°C | 10.3°C | 5.3°C | 23.8°C | -2.0°C | 80 mm | 80% | 1.6 m/s | 2.9 |
| 1992 | 17.1°C | 11.8°C | 6.6°C | 25.1°C | -2.5°C | 101 mm | 82% | 1.7 m/s | 3.1 |
| 1991 ❄️ | 14.4°C | 9.4°C | 4.5°C | 21.7°C | -2.7°C | 46 mm | 78% | 1.6 m/s | 3.4 |
| 1990 | 15.6°C | 10.5°C | 5.5°C | 24.3°C | 0.4°C | 107 mm | 79% | 1.6 m/s | 3.3 |
| 1989 | 17.6°C | 12.2°C | 6.8°C | 26.4°C | -1.1°C | 77 mm | 79% | 1.6 m/s | 3.7 |
| 1988 | 14.6°C | 10.3°C | 5.9°C | 21.2°C | 0.3°C | 113 mm | 84% | 1.8 m/s | 3 |
| 1987 | 15.8°C | 11.2°C | 6.7°C | 23.9°C | -0.6°C | 108 mm | 84% | 1.6 m/s | 3.2 |
| 1986 | 14.4°C | 9.5°C | 4.6°C | 21.9°C | -0.8°C | 107 mm | 81% | 1.6 m/s | 3.2 |
| 1985 | 17.3°C | 12.2°C | 7.1°C | 26.3°C | 3.1°C | 66 mm | 80% | 1.4 m/s | 3.5 |
| 1984 | 14.4°C | 9.6°C | 4.9°C | 23.5°C | 0.0°C | 53 mm | 79% | 1.7 m/s | 3.8 |
| 1983 | 17.0°C | 12.4°C | 7.8°C | 28.0°C | 1.1°C | 102 mm | 83% | 1.6 m/s | — |
| 1982 | 16.7°C | 11.7°C | 6.7°C | 25.8°C | -0.9°C | 73 mm | 82% | 1.4 m/s | — |
| 1981 | 16.1°C | 11.5°C | 6.8°C | 25.5°C | 1.5°C | 62 mm | 82% | 1.6 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 17.3°C with lows near 7.5°C (mean 12.4°C), based on 45 years of NASA POWER data.
September averages 90 mm of rainfall in Saguenay, a relatively wet time of year. The wettest on record was 200 mm in 2010.
The hottest September reached 30°C in 2010. The coldest dipped to -4.2°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.9°C. Daytime highs moved from 16.3°C to 19.6°C and overnight lows from 6.7°C to 9.2°C over the same span.
September is one of the warmer months of the year in Saguenay and a relatively wet time of year, so plan for around 17.3°C daytime highs and 7.5°C at night.
Not quite — September is the 9th coolest month in Saguenay, averaging 12.4°C.
For September in Saguenay, pack warm layers and a jacket for chilly mornings, with typical highs of 17.3°C and lows of 7.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 81% — quite humid.
Average wind speed in September is 1.6 m/s. The windiest September on record averaged 1.9 m/s (2007).
The wettest September on record was 2010 with 200 mm. On average, September sees 90 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 Saguenay 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.
