September is one of the warmer months of the year in Les Îles-de-la-Madeleine, with average highs near 15.6°C and lows around 13.7°C (mean 14.7°C). It is about average for rainfall, averaging 105 mm of rainfall and 82% relative humidity across the period.
September is one of the warmer months of the year in Les Îles-de-la-Madeleine. Across 45 years of records, the warmest September in Les Îles-de-la-Madeleine was 1999 — when the month averaged 17°C — while the coldest was 1986 at 12.4°C. Typical September days reach 15.6°C with nights near 13.7°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Les Îles-de-la-Madeleine, averaging 105 mm of rainfall. The wettest September on record was 1996 with 199 mm, while the driest was 2024 at 39 mm.
Relative humidity in Les Îles-de-la-Madeleine during September averages 82%. The most humid September was 2023 at 89%, and the least humid was 1986 at 76%.
September receives about 3.6 kWh/m²/day of solar energy in Les Îles-de-la-Madeleine. The sunniest September was 2025 at 4.3 kWh/m²/day, and the cloudiest were 1991 and 1997 at 3.
Average wind speed in Les Îles-de-la-Madeleine during September is 6.1 m/s. The windiest September was 1988 at 7 m/s, while the calmest was 2023 at 5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.9°C | 14.4°C | 14.6°C | 15.0°C | 15.9°C | +2°C |
| Avg High | 14.8°C | 15.3°C | 15.5°C | 16.0°C | 16.8°C | +2°C |
| Avg Low | 13.0°C | 13.5°C | 13.7°C | 13.9°C | 15.0°C | +2°C |
| Avg Rain | 91 mm | 131 mm | 115 mm | 98 mm | 80 mm | -11 mm |
September temperatures in Les Îles-de-la-Madeleine have risen by about 1.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 6.8°C (1989) to a record high of 21.8°C (2010).
Rainfall in September is about average for rainfall, averaging 105 mm, with a wettest year of 199 mm.
One of the best times to visit Les Îles-de-la-Madeleine
September is one of the best times to visit Les Îles-de-la-Madeleine. Expect days averaging 15.6°C and nights around 13.7°C (mean 14.7°C) — warmer than Les Îles-de-la-Madeleine's yearly average — with higher rainfall (105 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 | 17.3°C | 16.2°C | 15.2°C | 21.3°C | 11.5°C | 76 mm | 79% | 5.7 m/s | 4.3 |
| 2024 | 16.9°C | 16.2°C | 15.5°C | 19.5°C | 13.3°C | 39 mm | 83% | 5.3 m/s | 4 |
| 2023 | 16.9°C | 16.2°C | 15.4°C | 20.0°C | 11.5°C | 56 mm | 89% | 5 m/s | 3.2 |
| 2022 | 17.0°C | 15.9°C | 14.9°C | 21.3°C | 10.4°C | 118 mm | 81% | 6.4 m/s | 3.7 |
| 2021 | 16.8°C | 15.8°C | 14.8°C | 20.9°C | 11.9°C | 119 mm | 87% | 6.5 m/s | 3.6 |
| 2020 | 15.7°C | 14.9°C | 14.0°C | 18.3°C | 10.6°C | 73 mm | 81% | 6.3 m/s | 3.9 |
| 2019 | 14.5°C | 13.5°C | 12.4°C | 19.4°C | 8.9°C | 131 mm | 83% | 6.3 m/s | 3.5 |
| 2018 | 16.8°C | 15.5°C | 14.2°C | 20.9°C | 8.9°C | 85 mm | 77% | 6.2 m/s | 3.9 |
| 2017 | 16.5°C | 15.6°C | 14.6°C | 19.1°C | 10.0°C | 74 mm | 84% | 5.7 m/s | 3.3 |
| 2016 | 15.7°C | 14.9°C | 14.0°C | 19.5°C | 9.8°C | 101 mm | 83% | 6.5 m/s | 3.7 |
| 2015 | 17.0°C | 15.8°C | 14.5°C | 20.2°C | 10.7°C | 61 mm | 83% | 6.2 m/s | 3.8 |
| 2014 | 15.5°C | 14.4°C | 13.3°C | 19.3°C | 8.8°C | 88 mm | 80% | 6.2 m/s | 4 |
| 2013 | 15.6°C | 14.6°C | 13.6°C | 18.0°C | 10.6°C | 129 mm | 87% | 6.4 m/s | 3.2 |
| 2012 | 17.0°C | 16.1°C | 15.1°C | 19.9°C | 10.2°C | 152 mm | 83% | 6.5 m/s | 3.4 |
| 2011 | 15.8°C | 14.9°C | 13.9°C | 19.1°C | 11.2°C | 45 mm | 84% | 5.6 m/s | 4 |
| 2010 | 15.8°C | 14.8°C | 13.8°C | 21.8°C | 9.3°C | 118 mm | 84% | 6.2 m/s | 3.2 |
| 2009 | 14.9°C | 13.9°C | 13.0°C | 17.4°C | 9.4°C | 72 mm | 82% | 6.4 m/s | 4.1 |
| 2008 | 15.6°C | 14.8°C | 13.9°C | 19.6°C | 9.4°C | 158 mm | 83% | 6.4 m/s | 3.4 |
| 2007 | 14.9°C | 13.8°C | 12.8°C | 18.5°C | 9.1°C | 130 mm | 82% | 6.7 m/s | 3.8 |
| 2006 | 15.9°C | 15.1°C | 14.4°C | 18.5°C | 11.5°C | 91 mm | 83% | 5.9 m/s | 3.7 |
| 2005 | 16.6°C | 15.5°C | 14.4°C | 20.9°C | 11.1°C | 159 mm | 82% | 6.7 m/s | 3.6 |
| 2004 | 14.4°C | 13.4°C | 12.4°C | 17.9°C | 9.0°C | 89 mm | 81% | 6.7 m/s | 3.6 |
| 2003 | 16.3°C | 15.6°C | 14.9°C | 18.7°C | 11.9°C | 76 mm | 87% | 5.3 m/s | 4.1 |
| 2002 | 15.0°C | 14.0°C | 13.1°C | 18.7°C | 8.0°C | 185 mm | 84% | 6.4 m/s | 3.7 |
| 2001 | 16.4°C | 15.4°C | 14.4°C | 19.3°C | 10.5°C | 88 mm | 81% | 5.9 m/s | 3.9 |
| 2000 | 15.4°C | 14.5°C | 13.5°C | 18.2°C | 8.6°C | 96 mm | 78% | 6.5 m/s | 3.7 |
| 1999 🔥 | 17.8°C | 17.0°C | 16.1°C | 21.0°C | 12.5°C | 141 mm | 87% | 5.6 m/s | 3.6 |
| 1998 | 14.8°C | 14.1°C | 13.4°C | 17.8°C | 10.4°C | 191 mm | 86% | 5.4 m/s | 3.5 |
| 1997 | 15.5°C | 14.4°C | 13.4°C | 19.0°C | 9.0°C | 131 mm | 85% | 5.9 m/s | 3 |
| 1996 🌧️ | 15.2°C | 14.4°C | 13.7°C | 18.0°C | 9.4°C | 199 mm | 80% | 6.5 m/s | 3.4 |
| 1995 | 14.3°C | 13.3°C | 12.4°C | 17.3°C | 7.7°C | 122 mm | 78% | 6 m/s | 3.9 |
| 1994 | 14.6°C | 13.9°C | 13.2°C | 16.7°C | 11.0°C | 158 mm | 82% | 5.4 m/s | 3.7 |
| 1993 | 15.8°C | 14.7°C | 13.6°C | 18.6°C | 10.5°C | 114 mm | 81% | 6.5 m/s | 3.5 |
| 1992 | 16.0°C | 14.9°C | 13.8°C | 18.5°C | 9.4°C | 48 mm | 82% | 5.8 m/s | 3.5 |
| 1991 | 14.2°C | 13.2°C | 12.2°C | 17.0°C | 8.9°C | 121 mm | 84% | 5.9 m/s | 3 |
| 1990 | 15.1°C | 14.1°C | 13.2°C | 19.0°C | 10.5°C | 85 mm | 82% | 5.9 m/s | 3.4 |
| 1989 | 14.7°C | 13.5°C | 12.4°C | 19.3°C | 6.8°C | 102 mm | 84% | 6.2 m/s | 3.8 |
| 1988 | 14.6°C | 13.7°C | 12.8°C | 17.9°C | 9.6°C | 81 mm | 80% | 7 m/s | 3.3 |
| 1987 | 15.0°C | 14.3°C | 13.5°C | 17.7°C | 9.0°C | 98 mm | 83% | 6.5 m/s | 3.7 |
| 1986 ❄️ | 13.2°C | 12.4°C | 11.6°C | 17.7°C | 8.9°C | 85 mm | 76% | 6 m/s | 3.5 |
| 1985 | 15.4°C | 14.5°C | 13.6°C | 18.2°C | 10.9°C | 41 mm | 80% | 5.3 m/s | 4.1 |
| 1984 | 15.0°C | 13.9°C | 12.9°C | 18.2°C | 8.6°C | 114 mm | 78% | 6.4 m/s | 3.9 |
| 1983 | 15.7°C | 14.9°C | 14.0°C | 19.4°C | 10.3°C | 89 mm | 83% | 5.9 m/s | — |
| 1982 | 14.3°C | 13.4°C | 12.6°C | 17.1°C | 9.1°C | 118 mm | 85% | 5.2 m/s | — |
| 1981 | 15.7°C | 14.9°C | 14.0°C | 18.1°C | 8.7°C | 96 mm | 83% | 6.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 15.6°C with lows near 13.7°C (mean 14.7°C), based on 45 years of NASA POWER data.
September averages 105 mm of rainfall in Les Îles-de-la-Madeleine, about average for rainfall. The wettest on record was 199 mm in 1996.
The hottest September reached 21.8°C in 2010. The coldest dipped to 6.8°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.8°C. Daytime highs moved from 15.2°C to 17°C and overnight lows from 13.4°C to 15.2°C over the same span.
September is one of the warmer months of the year in Les Îles-de-la-Madeleine and about average for rainfall, so plan for around 15.6°C daytime highs and 13.7°C at night.
Not quite — September is the 10th coolest month in Les Îles-de-la-Madeleine, averaging 14.7°C.
For September in Les Îles-de-la-Madeleine, pack light layers you can adjust through the day, with typical highs of 15.6°C and lows of 13.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 82% — quite humid.
Average wind speed in September is 6.1 m/s. The windiest September on record averaged 7 m/s (1988).
The wettest September on record was 1996 with 199 mm. On average, September sees 105 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 Les Îles-de-la-Madeleine 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.
