September is one of the cooler months of the year in Port Douglas, with average highs near 26.1°C and lows around 21°C (mean 23.6°C). It is one of the drier months, averaging 32 mm of rainfall and 74% relative humidity across the period.
September is one of the cooler months of the year in Port Douglas. Across 45 years of records, the warmest September in Port Douglas was 2022 — when the month averaged 25.2°C — while the coldest was 1990 at 21.9°C. Typical September days reach 26.1°C with nights near 21°C. The long-term trend is warming, about 0.2°C per decade.
September is one of the drier months in Port Douglas, averaging 32 mm of rainfall. The wettest September on record was 2010 with 132 mm, while the driest was 1991 at 1 mm.
Relative humidity in Port Douglas during September averages 74%. The most humid September was 2010 at 82%, and the least humid was 1991 at 66%.
September receives about 6 kWh/m²/day of solar energy in Port Douglas. The sunniest September was 2019 at 6.5 kWh/m²/day, and the cloudiest was 2010 at 5.3.
Average wind speed in Port Douglas during September is 2.8 m/s. The windiest September was 1981 at 3.5 m/s, while the calmest was 1984 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.4°C | 23.3°C | 23.5°C | 23.7°C | 24.2°C | +0.8°C |
| Avg High | 26.0°C | 25.9°C | 26.1°C | 26.3°C | 26.5°C | +0.5°C |
| Avg Low | 20.8°C | 20.7°C | 20.9°C | 21.1°C | 21.8°C | +1°C |
| Avg Rain | 34 mm | 35 mm | 24 mm | 31 mm | 37 mm | +3 mm |
September temperatures in Port Douglas have risen by about 1.1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 17.2°C (2006) to a record high of 33°C (2003).
Rainfall in September is one of the drier months, averaging 32 mm, with a wettest year of 132 mm.
One of the best times to visit Port Douglas
September is one of the best times to visit Port Douglas. Expect days averaging 26.1°C and nights around 21°C (mean 23.6°C) — cooler than Port Douglas's yearly average — with moderate rainfall (32 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 | 26.7°C | 24.3°C | 21.8°C | 28.8°C | 20.6°C | 97 mm | 77% | 3 m/s | 5.6 |
| 2024 | 26.8°C | 24.4°C | 22.0°C | 29.7°C | 21.0°C | 14 mm | 74% | 3.1 m/s | 5.6 |
| 2023 | 26.0°C | 23.7°C | 21.4°C | 28.5°C | 20.3°C | 37 mm | 73% | 3.4 m/s | 5.9 |
| 2022 🔥 | 27.6°C | 25.2°C | 22.7°C | 29.8°C | 19.9°C | 14 mm | 76% | 2.5 m/s | 6.2 |
| 2021 | 25.9°C | 23.7°C | 21.4°C | 28.2°C | 19.2°C | 23 mm | 73% | 3.4 m/s | 5.5 |
| 2020 | 26.1°C | 23.8°C | 21.4°C | 28.6°C | 19.8°C | 36 mm | 76% | 3.4 m/s | 5.9 |
| 2019 | 25.7°C | 22.9°C | 20.0°C | 28.2°C | 17.7°C | 3 mm | 67% | 3 m/s | 6.5 |
| 2018 | 26.3°C | 23.6°C | 21.0°C | 28.8°C | 19.4°C | 7 mm | 71% | 3 m/s | 6.4 |
| 2017 | 26.1°C | 23.7°C | 21.3°C | 28.2°C | 19.1°C | 20 mm | 73% | 2.8 m/s | 6.1 |
| 2016 | 27.1°C | 24.7°C | 22.3°C | 29.6°C | 21.3°C | 54 mm | 80% | 2.4 m/s | 5.7 |
| 2015 | 26.0°C | 23.4°C | 20.8°C | 28.9°C | 19.7°C | 19 mm | 72% | 2.7 m/s | 6.1 |
| 2014 | 26.3°C | 23.3°C | 20.3°C | 27.7°C | 18.5°C | 2 mm | 71% | 2.5 m/s | 6.4 |
| 2013 | 26.7°C | 23.8°C | 21.0°C | 29.3°C | 19.5°C | 38 mm | 74% | 2.5 m/s | 6.4 |
| 2012 | 26.2°C | 23.6°C | 20.9°C | 28.1°C | 19.9°C | 13 mm | 74% | 2.6 m/s | 6 |
| 2011 | 25.6°C | 22.9°C | 20.2°C | 31.6°C | 17.9°C | 20 mm | 71% | 3.1 m/s | 6.1 |
| 2010 🌧️ | 26.9°C | 24.9°C | 22.9°C | 27.7°C | 21.1°C | 132 mm | 82% | 2.8 m/s | 5.3 |
| 2009 | 27.0°C | 24.5°C | 21.9°C | 30.3°C | 20.6°C | 2 mm | 69% | 2.7 m/s | 6.2 |
| 2008 | 26.3°C | 23.9°C | 21.5°C | 28.9°C | 20.3°C | 45 mm | 77% | 2.9 m/s | 5.8 |
| 2007 | 26.0°C | 22.9°C | 19.8°C | 28.8°C | 18.6°C | 9 mm | 74% | 2.6 m/s | 6.4 |
| 2006 | 24.7°C | 22.3°C | 19.9°C | 26.6°C | 17.2°C | 89 mm | 75% | 3.1 m/s | 6 |
| 2005 | 25.7°C | 23.3°C | 20.9°C | 27.2°C | 19.4°C | 9 mm | 74% | 2.6 m/s | 5.9 |
| 2004 | 25.5°C | 23.2°C | 20.9°C | 27.6°C | 19.8°C | 23 mm | 71% | 3.1 m/s | 5.8 |
| 2003 | 26.4°C | 23.7°C | 21.0°C | 33.0°C | 19.7°C | 4 mm | 69% | 2.6 m/s | 6.4 |
| 2002 | 26.4°C | 23.5°C | 20.7°C | 28.6°C | 19.0°C | 17 mm | 73% | 2.4 m/s | 6.2 |
| 2001 | 26.5°C | 24.0°C | 21.5°C | 28.7°C | 20.5°C | 24 mm | 75% | 3 m/s | 5.8 |
| 2000 | 26.6°C | 23.9°C | 21.2°C | 30.9°C | 19.6°C | 13 mm | 72% | 2.8 m/s | 6.1 |
| 1999 | 25.6°C | 23.1°C | 20.5°C | 27.7°C | 19.2°C | 50 mm | 76% | 3 m/s | 6.1 |
| 1998 | 26.6°C | 24.5°C | 22.4°C | 28.8°C | 21.3°C | 71 mm | 79% | 2.9 m/s | 5.8 |
| 1997 | 26.2°C | 23.5°C | 20.7°C | 29.1°C | 19.6°C | 23 mm | 74% | 2.3 m/s | 6.1 |
| 1996 | 26.6°C | 23.4°C | 20.2°C | 30.9°C | 17.8°C | 7 mm | 69% | 2.5 m/s | 6.4 |
| 1995 | 25.8°C | 23.2°C | 20.5°C | 29.4°C | 19.2°C | 5 mm | 74% | 2.6 m/s | 6.2 |
| 1994 | 25.1°C | 22.3°C | 19.5°C | 30.9°C | 18.5°C | 15 mm | 74% | 2.5 m/s | 6.2 |
| 1993 | 25.2°C | 22.9°C | 20.6°C | 27.6°C | 19.8°C | 76 mm | 76% | 2.8 m/s | 5.7 |
| 1992 | 27.2°C | 24.6°C | 21.9°C | 29.9°C | 20.1°C | 39 mm | 76% | 2.2 m/s | 5.8 |
| 1991 | 26.7°C | 23.7°C | 20.8°C | 30.0°C | 18.7°C | 1 mm | 66% | 2.5 m/s | 6.3 |
| 1990 ❄️ | 24.4°C | 21.9°C | 19.4°C | 25.7°C | 17.5°C | 62 mm | 72% | 3.4 m/s | 5.7 |
| 1989 | 26.5°C | 23.7°C | 20.8°C | 30.4°C | 19.5°C | 6 mm | 72% | 2.5 m/s | 6.1 |
| 1988 | 26.3°C | 23.7°C | 21.1°C | 29.3°C | 18.8°C | 38 mm | 75% | 2.9 m/s | 6 |
| 1987 | 24.8°C | 22.6°C | 20.5°C | 27.2°C | 19.2°C | 52 mm | 77% | 3.1 m/s | 5.4 |
| 1986 | 26.9°C | 24.2°C | 21.4°C | 31.2°C | 19.9°C | 31 mm | 75% | 2.4 m/s | 6 |
| 1985 | 26.0°C | 23.0°C | 19.9°C | 29.9°C | 17.4°C | 19 mm | 71% | 2.6 m/s | 6.3 |
| 1984 | 26.7°C | 23.9°C | 21.2°C | 30.4°C | 19.7°C | 3 mm | 74% | 2.1 m/s | 6 |
| 1983 | 26.1°C | 23.6°C | 21.2°C | 28.1°C | 19.1°C | 58 mm | 78% | 2.6 m/s | — |
| 1982 | 25.0°C | 22.4°C | 19.8°C | 29.0°C | 17.3°C | 22 mm | 73% | 2.5 m/s | — |
| 1981 | 25.3°C | 23.1°C | 20.9°C | 27.9°C | 19.6°C | 76 mm | 75% | 3.5 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 26.1°C with lows near 21°C (mean 23.6°C), based on 45 years of NASA POWER data.
September averages 32 mm of rainfall in Port Douglas, one of the drier months. The wettest on record was 132 mm in 2010.
The hottest September reached 33°C in 2003. The coldest dipped to 17.2°C in 2006.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.1°C. Daytime highs moved from 25.8°C to 26.6°C and overnight lows from 20.6°C to 21.9°C over the same span.
September is one of the cooler months of the year in Port Douglas and one of the drier months, so plan for around 26.1°C daytime highs and 21°C at night.
Not quite — September is the 5th coolest month in Port Douglas, averaging 23.6°C.
For September in Port Douglas, pack light layers you can adjust through the day, with typical highs of 26.1°C and lows of 21°C.
Relative humidity in September averages 74% — moderately humid.
Average wind speed in September is 2.8 m/s. The windiest September on record averaged 3.5 m/s (1981).
The wettest September on record was 2010 with 132 mm. On average, September sees 32 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 Port Douglas 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.
