September is one of the warmer months of the year in Powell River, with average highs near 17.4°C and lows around 9.8°C (mean 13.6°C). It is one of the drier months, averaging 86 mm of rainfall and 78% relative humidity across the period.
September is one of the warmer months of the year in Powell River. Across 45 years of records, the warmest September in Powell River was 2020 — when the month averaged 15.9°C — while the coldest was 1992 at 11°C. Typical September days reach 17.4°C with nights near 9.8°C. The long-term trend is warming, about 0.3°C per decade.
September is one of the drier months in Powell River, averaging 86 mm of rainfall. The wettest September on record was 2018 with 223 mm, while the driest was 1993 at 2 mm.
Relative humidity in Powell River during September averages 78%. The most humid September was 2025 at 84%, and the least humid was 1993 at 72%.
September receives about 3.8 kWh/m²/day of solar energy in Powell River. The sunniest September was 1993 at 4.8 kWh/m²/day, and the cloudiest was 2021 at 3.1.
Average wind speed in Powell River during September is 0.8 m/s. The windiest Septembers were 2009, 2019 and 2021 at 0.9 m/s, while the calmest was 1993 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.8°C | 14.0°C | 13.3°C | 13.7°C | 14.6°C | +1.8°C |
| Avg High | 16.7°C | 18.0°C | 17.0°C | 17.3°C | 18.2°C | +1.5°C |
| Avg Low | 8.8°C | 10.0°C | 9.5°C | 10.1°C | 11.0°C | +2.2°C |
| Avg Rain | 76 mm | 58 mm | 77 mm | 124 mm | 98 mm | +22 mm |
September temperatures in Powell River have risen by about 2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.6°C (1983) to a record high of 31.6°C (2024).
Rainfall in September is one of the drier months, averaging 86 mm, with a wettest year of 223 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Powell River
September is one of the best times to visit Powell River. Expect days averaging 17.4°C and nights around 9.8°C (mean 13.6°C) — warmer than Powell River's yearly average — with higher rainfall (86 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 | 19.1°C | 15.5°C | 12.0°C | 30.6°C | 7.3°C | 144 mm | 84% | 0.7 m/s | 3.6 |
| 2024 | 18.0°C | 14.2°C | 10.5°C | 31.6°C | 3.4°C | 78 mm | 80% | 0.7 m/s | 3.6 |
| 2023 | 17.3°C | 13.5°C | 9.6°C | 23.3°C | 5.1°C | 66 mm | 77% | 0.8 m/s | 3.8 |
| 2022 | 19.8°C | 15.6°C | 11.4°C | 27.8°C | 7.7°C | 36 mm | 74% | 0.7 m/s | 4.4 |
| 2021 | 15.6°C | 12.7°C | 9.8°C | 23.5°C | 5.0°C | 159 mm | 84% | 0.9 m/s | 3.1 |
| 2020 🔥 | 19.4°C | 15.9°C | 12.4°C | 29.0°C | 8.4°C | 106 mm | 81% | 0.8 m/s | 3.5 |
| 2019 | 16.4°C | 13.3°C | 10.2°C | 24.4°C | 2.7°C | 149 mm | 83% | 0.9 m/s | 3.2 |
| 2018 🌧️ | 15.7°C | 12.3°C | 8.9°C | 22.5°C | 5.8°C | 223 mm | 83% | 0.8 m/s | 3.2 |
| 2017 | 18.6°C | 15.0°C | 11.4°C | 31.0°C | 6.6°C | 70 mm | 77% | 0.7 m/s | 3.6 |
| 2016 | 15.8°C | 12.3°C | 8.8°C | 21.0°C | 5.8°C | 85 mm | 82% | 0.8 m/s | 3.6 |
| 2015 | 15.3°C | 11.9°C | 8.6°C | 23.9°C | 4.4°C | 128 mm | 81% | 0.8 m/s | 3.4 |
| 2014 | 19.1°C | 15.1°C | 11.1°C | 25.8°C | 7.2°C | 72 mm | 76% | 0.8 m/s | 3.9 |
| 2013 | 18.3°C | 14.7°C | 11.2°C | 28.7°C | 5.0°C | 181 mm | 81% | 0.8 m/s | 3.5 |
| 2012 | 19.1°C | 14.7°C | 10.3°C | 27.7°C | 5.4°C | 20 mm | 75% | 0.7 m/s | 4.4 |
| 2011 | 18.3°C | 14.7°C | 11.1°C | 28.7°C | 7.4°C | 140 mm | 78% | 0.8 m/s | 3.7 |
| 2010 | 16.2°C | 12.7°C | 9.2°C | 23.1°C | 6.5°C | 176 mm | 82% | 0.8 m/s | 3.2 |
| 2009 | 17.2°C | 13.6°C | 10.0°C | 25.0°C | 4.6°C | 106 mm | 79% | 0.9 m/s | 3.6 |
| 2008 | 18.0°C | 13.8°C | 9.6°C | 26.9°C | 6.1°C | 22 mm | 76% | 0.8 m/s | 4 |
| 2007 | 16.2°C | 12.6°C | 8.9°C | 26.2°C | 4.5°C | 116 mm | 81% | 0.8 m/s | 3.6 |
| 2006 | 18.6°C | 14.5°C | 10.4°C | 26.5°C | 5.8°C | 56 mm | 74% | 0.7 m/s | 4.2 |
| 2005 | 15.9°C | 12.4°C | 8.9°C | 19.8°C | 5.1°C | 77 mm | 80% | 0.7 m/s | 3.9 |
| 2004 | 15.6°C | 12.4°C | 9.2°C | 19.9°C | 6.0°C | 125 mm | 84% | 0.7 m/s | 3.4 |
| 2003 | 18.4°C | 14.3°C | 10.1°C | 28.2°C | 6.7°C | 63 mm | 77% | 0.7 m/s | 3.9 |
| 2002 | 16.7°C | 13.0°C | 9.2°C | 23.1°C | 5.0°C | 57 mm | 77% | 0.8 m/s | 3.9 |
| 2001 | 16.8°C | 13.2°C | 9.6°C | 24.3°C | 5.8°C | 64 mm | 81% | 0.7 m/s | 3.8 |
| 2000 | 16.8°C | 13.2°C | 9.5°C | 24.2°C | 5.3°C | 81 mm | 78% | 0.7 m/s | 3.6 |
| 1999 | 17.8°C | 13.2°C | 8.6°C | 28.8°C | 4.3°C | 63 mm | 75% | 0.8 m/s | 4.5 |
| 1998 | 18.7°C | 14.6°C | 10.5°C | 23.0°C | 7.8°C | 29 mm | 78% | 0.7 m/s | 4.1 |
| 1997 | 18.1°C | 14.5°C | 10.9°C | 28.4°C | 6.9°C | 167 mm | 78% | 0.8 m/s | 3.5 |
| 1996 | 15.1°C | 11.9°C | 8.6°C | 23.1°C | 3.6°C | 99 mm | 79% | 0.8 m/s | 3.5 |
| 1995 | 20.1°C | 15.8°C | 11.5°C | 28.9°C | 7.6°C | 37 mm | 72% | 0.7 m/s | 4.1 |
| 1994 | 18.2°C | 14.6°C | 10.9°C | 27.5°C | 7.8°C | 67 mm | 78% | 0.7 m/s | 3.6 |
| 1993 | 18.9°C | 14.7°C | 10.4°C | 28.0°C | 4.5°C | 2 mm | 72% | 0.6 m/s | 4.8 |
| 1992 ❄️ | 14.4°C | 11.0°C | 7.5°C | 20.1°C | 3.2°C | 89 mm | 80% | 0.8 m/s | 3.7 |
| 1991 | 19.1°C | 14.5°C | 10.0°C | 27.7°C | 6.7°C | 10 mm | 74% | 0.7 m/s | 4.3 |
| 1990 | 20.0°C | 15.5°C | 11.1°C | 27.0°C | 7.5°C | 13 mm | 72% | 0.7 m/s | 4.3 |
| 1989 | 19.5°C | 14.7°C | 9.9°C | 25.7°C | 6.6°C | 22 mm | 73% | 0.7 m/s | 4.5 |
| 1988 | 16.8°C | 12.7°C | 8.6°C | 29.0°C | 3.9°C | 96 mm | 78% | 0.8 m/s | 3.8 |
| 1987 | 18.8°C | 14.5°C | 10.2°C | 26.8°C | 6.2°C | 35 mm | 74% | 0.7 m/s | 3.9 |
| 1986 | 15.4°C | 11.9°C | 8.3°C | 21.7°C | 3.3°C | 71 mm | 78% | 0.7 m/s | 3.8 |
| 1985 | 15.9°C | 11.7°C | 7.5°C | 20.9°C | 4.4°C | 79 mm | 75% | 0.7 m/s | 3.8 |
| 1984 | 15.2°C | 11.4°C | 7.5°C | 21.1°C | 3.6°C | 99 mm | 77% | 0.8 m/s | 3.4 |
| 1983 | 15.3°C | 11.6°C | 7.8°C | 22.5°C | 2.6°C | 80 mm | 76% | 0.7 m/s | — |
| 1982 | 17.6°C | 13.8°C | 10.0°C | 23.8°C | 5.6°C | 62 mm | 79% | 0.7 m/s | — |
| 1981 | 16.2°C | 12.8°C | 9.4°C | 25.2°C | 4.3°C | 140 mm | 79% | 0.8 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 17.4°C with lows near 9.8°C (mean 13.6°C), based on 45 years of NASA POWER data.
September averages 86 mm of rainfall in Powell River, one of the drier months. The wettest on record was 223 mm in 2018.
The hottest September reached 31.6°C in 2024. The coldest dipped to 2.6°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2°C. Daytime highs moved from 16°C to 18°C and overnight lows from 8.4°C to 10.7°C over the same span.
September is one of the warmer months of the year in Powell River and one of the drier months, so plan for around 17.4°C daytime highs and 9.8°C at night.
Not quite — September is the 10th coolest month in Powell River, averaging 13.6°C.
For September in Powell River, pack light layers you can adjust through the day, with typical highs of 17.4°C and lows of 9.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 78% — quite humid.
Average wind speed in September is 0.8 m/s. The windiest September on record averaged 0.9 m/s (2009).
The wettest September on record was 2018 with 223 mm. On average, September sees 86 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 Powell River 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.
