September is one of the warmer months of the year in Saint-Augustin-de-Desmaures, with average highs near 18.7°C and lows around 8.5°C (mean 13.6°C). It is about average for rainfall, averaging 95 mm of rainfall and 83% relative humidity across the period.
September is one of the warmer months of the year in Saint-Augustin-de-Desmaures. Across 45 years of records, the warmest Septembers in Saint-Augustin-de-Desmaures were 2015 and 2023 — when the month averaged 16.3°C — while the coldest was 1991 at 10.8°C. Typical September days reach 18.7°C with nights near 8.5°C. The long-term trend is warming, about 0.7°C per decade.
September is about average for rainfall in Saint-Augustin-de-Desmaures, averaging 95 mm of rainfall. The wettest September on record was 1999 with 173 mm, while the driest was 2025 at 47 mm.
Relative humidity in Saint-Augustin-de-Desmaures during September averages 83%. The most humid September was 1987 at 86%, and the least humid was 1995 at 79%.
September receives about 3.7 kWh/m²/day of solar energy in Saint-Augustin-de-Desmaures. The sunniest September was 2025 at 4.4 kWh/m²/day, and the cloudiest was 2010 at 3.
Average wind speed in Saint-Augustin-de-Desmaures during September is 1.4 m/s. The windiest September was 1988 at 1.6 m/s, while the calmest was 2023 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.4°C | 12.8°C | 13.9°C | 14.5°C | 14.7°C | +2.3°C |
| Avg High | 17.4°C | 17.9°C | 19.1°C | 19.5°C | 19.8°C | +2.4°C |
| Avg Low | 7.4°C | 7.7°C | 8.7°C | 9.5°C | 9.5°C | +2.1°C |
| Avg Rain | 103 mm | 104 mm | 87 mm | 103 mm | 68 mm | -35 mm |
September temperatures in Saint-Augustin-de-Desmaures have risen by about 2.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -1.9°C (2000) to a record high of 29.7°C (1999).
Rainfall in September is about average for rainfall, averaging 95 mm, with a wettest year of 173 mm.
One of the best times to visit Saint-Augustin-de-Desmaures
September is one of the best times to visit Saint-Augustin-de-Desmaures. Expect days averaging 18.7°C and nights around 8.5°C (mean 13.6°C) — warmer than Saint-Augustin-de-Desmaures's yearly average — with higher rainfall (95 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 | 20.0°C | 14.6°C | 9.1°C | 24.5°C | 1.2°C | 47 mm | 80% | 1.1 m/s | 4.4 |
| 2024 | 20.8°C | 15.6°C | 10.4°C | 25.9°C | 5.7°C | 50 mm | 83% | 1.3 m/s | 4.1 |
| 2023 | 21.3°C | 16.3°C | 11.3°C | 28.6°C | 5.7°C | 76 mm | 84% | 1 m/s | 3.7 |
| 2022 | 18.9°C | 13.7°C | 8.5°C | 26.3°C | 2.3°C | 72 mm | 81% | 1.2 m/s | 3.8 |
| 2021 | 19.9°C | 14.9°C | 10.0°C | 25.1°C | 5.6°C | 93 mm | 83% | 1.3 m/s | 3.5 |
| 2020 | 18.2°C | 13.0°C | 7.8°C | 24.8°C | 1.0°C | 71 mm | 80% | 1.5 m/s | 3.6 |
| 2019 | 17.9°C | 13.2°C | 8.4°C | 24.4°C | 2.7°C | 117 mm | 83% | 1.3 m/s | 3.5 |
| 2018 | 19.9°C | 14.7°C | 9.6°C | 27.1°C | -1.1°C | 89 mm | 82% | 1.4 m/s | 3.8 |
| 2017 | 21.2°C | 16.2°C | 11.3°C | 28.2°C | 4.0°C | 76 mm | 84% | 1.2 m/s | 3.9 |
| 2016 | 20.0°C | 14.9°C | 9.7°C | 27.0°C | 1.6°C | 72 mm | 82% | 1.3 m/s | 4.1 |
| 2015 🔥 | 21.4°C | 16.3°C | 11.1°C | 27.3°C | 2.1°C | 117 mm | 83% | 1.3 m/s | 4.2 |
| 2014 | 18.6°C | 13.5°C | 8.4°C | 26.7°C | -1.2°C | 78 mm | 84% | 1.5 m/s | 3.6 |
| 2013 | 17.8°C | 12.9°C | 8.0°C | 26.5°C | 1.0°C | 110 mm | 83% | 1.4 m/s | 3.6 |
| 2012 | 19.0°C | 13.7°C | 8.3°C | 25.2°C | 2.5°C | 81 mm | 81% | 1.5 m/s | 3.9 |
| 2011 | 20.5°C | 15.6°C | 10.7°C | 25.9°C | 3.3°C | 120 mm | 85% | 1.2 m/s | 3.6 |
| 2010 | 18.7°C | 14.3°C | 9.9°C | 28.7°C | 4.0°C | 170 mm | 85% | 1.5 m/s | 3 |
| 2009 | 18.3°C | 12.9°C | 7.5°C | 22.9°C | 0.5°C | 62 mm | 82% | 1.2 m/s | 4.2 |
| 2008 | 19.3°C | 14.2°C | 9.1°C | 27.0°C | 0.9°C | 87 mm | 84% | 1.2 m/s | 3.5 |
| 2007 | 19.2°C | 14.0°C | 8.8°C | 27.5°C | 2.5°C | 101 mm | 81% | 1.5 m/s | 4 |
| 2006 | 18.2°C | 13.1°C | 8.0°C | 22.6°C | 2.3°C | 76 mm | 83% | 1.3 m/s | 3.4 |
| 2005 | 19.7°C | 14.6°C | 9.4°C | 26.8°C | 3.1°C | 139 mm | 84% | 1.5 m/s | 3.6 |
| 2004 | 19.2°C | 13.8°C | 8.4°C | 23.9°C | 3.7°C | 82 mm | 82% | 1.3 m/s | 4 |
| 2003 | 20.5°C | 15.2°C | 9.8°C | 26.9°C | 5.1°C | 57 mm | 82% | 1.3 m/s | 3.9 |
| 2002 | 20.4°C | 15.1°C | 9.8°C | 28.0°C | 2.7°C | 99 mm | 81% | 1.4 m/s | 4.1 |
| 2001 | 18.8°C | 14.1°C | 9.3°C | 27.5°C | 2.1°C | 62 mm | 83% | 1.4 m/s | 3.9 |
| 2000 | 17.0°C | 12.0°C | 7.1°C | 24.5°C | -1.9°C | 109 mm | 83% | 1.4 m/s | 3.4 |
| 1999 🌧️ | 20.9°C | 16.0°C | 11.1°C | 29.7°C | 4.8°C | 173 mm | 84% | 1.3 m/s | 3.6 |
| 1998 | 18.9°C | 13.9°C | 8.9°C | 24.4°C | 1.9°C | 111 mm | 82% | 1.3 m/s | 3.5 |
| 1997 | 17.8°C | 12.8°C | 7.9°C | 23.2°C | 0.3°C | 68 mm | 84% | 1.5 m/s | 3.1 |
| 1996 | 18.4°C | 13.6°C | 8.8°C | 25.8°C | 2.2°C | 99 mm | 84% | 1.3 m/s | 3.6 |
| 1995 | 16.9°C | 11.0°C | 5.2°C | 23.2°C | -0.5°C | 85 mm | 79% | 1.4 m/s | 3.8 |
| 1994 | 17.4°C | 12.5°C | 7.7°C | 22.1°C | 3.2°C | 77 mm | 86% | 1.3 m/s | 3.3 |
| 1993 | 17.0°C | 12.1°C | 7.2°C | 25.3°C | 0.4°C | 124 mm | 82% | 1.5 m/s | 3.4 |
| 1992 | 18.4°C | 13.1°C | 7.8°C | 26.0°C | -0.9°C | 115 mm | 81% | 1.5 m/s | 3.6 |
| 1991 ❄️ | 15.9°C | 10.8°C | 5.6°C | 23.5°C | -1.3°C | 75 mm | 81% | 1.4 m/s | 3.7 |
| 1990 | 16.9°C | 12.0°C | 7.0°C | 23.9°C | 1.4°C | 110 mm | 83% | 1.4 m/s | 3.2 |
| 1989 | 18.4°C | 13.3°C | 8.2°C | 27.8°C | -0.4°C | 82 mm | 82% | 1.3 m/s | 3.7 |
| 1988 | 16.6°C | 11.6°C | 6.6°C | 23.0°C | 0.0°C | 81 mm | 83% | 1.6 m/s | 3.5 |
| 1987 | 16.9°C | 12.2°C | 7.6°C | 23.5°C | 0.0°C | 119 mm | 86% | 1.4 m/s | 3.3 |
| 1986 | 16.3°C | 11.3°C | 6.2°C | 22.6°C | 0.9°C | 158 mm | 83% | 1.4 m/s | 3.4 |
| 1985 | 18.6°C | 13.2°C | 7.9°C | 24.5°C | 2.6°C | 112 mm | 83% | 1.3 m/s | 4 |
| 1984 | 16.2°C | 11.0°C | 5.8°C | 23.2°C | -0.2°C | 52 mm | 81% | 1.4 m/s | 3.7 |
| 1983 | 19.0°C | 13.9°C | 8.8°C | 26.8°C | 2.0°C | 79 mm | 82% | 1.4 m/s | — |
| 1982 | 17.8°C | 13.0°C | 8.1°C | 25.0°C | 2.2°C | 102 mm | 85% | 1.3 m/s | — |
| 1981 | 16.9°C | 12.3°C | 7.6°C | 24.8°C | 1.0°C | 142 mm | 84% | 1.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 18.7°C with lows near 8.5°C (mean 13.6°C), based on 45 years of NASA POWER data.
September averages 95 mm of rainfall in Saint-Augustin-de-Desmaures, about average for rainfall. The wettest on record was 173 mm in 1999.
The hottest September reached 29.7°C in 1999. The coldest dipped to -1.9°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.3°C. Daytime highs moved from 17.7°C to 20.2°C and overnight lows from 7.6°C to 9.9°C over the same span.
September is one of the warmer months of the year in Saint-Augustin-de-Desmaures and about average for rainfall, so plan for around 18.7°C daytime highs and 8.5°C at night.
Not quite — September is the 9th coolest month in Saint-Augustin-de-Desmaures, averaging 13.6°C.
For September in Saint-Augustin-de-Desmaures, pack light layers you can adjust through the day, with typical highs of 18.7°C and lows of 8.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 83% — quite humid.
Average wind speed in September is 1.4 m/s. The windiest September on record averaged 1.6 m/s (1988).
The wettest September on record was 1999 with 173 mm. On average, September sees 95 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 Saint-Augustin-de-Desmaures 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.
