September is one of the cooler months of the year in Parkes, with average highs near 20°C and lows around 6.4°C (mean 13.2°C). It is about average for rainfall, averaging 40 mm of rainfall and 65% relative humidity across the period.
September is one of the cooler months of the year in Parkes. Across 45 years of records, the warmest September in Parkes was 2023 — when the month averaged 16.8°C — while the coldest was 1984 at 10.1°C. Typical September days reach 20°C with nights near 6.4°C. The long-term trend is warming, about 0.5°C per decade.
September is about average for rainfall in Parkes, averaging 40 mm of rainfall. The wettest September on record was 2005 with 106 mm, while the driest was 2007 at 3 mm.
Relative humidity in Parkes during September averages 65%. The most humid September was 1998 at 82%, and the least humid was 2019 at 45%.
September receives about 5 kWh/m²/day of solar energy in Parkes. The sunniest September was 2023 at 5.8 kWh/m²/day, and the cloudiest was 2016 at 3.9.
Average wind speed in Parkes during September is 2.5 m/s. The windiest September was 2009 at 2.9 m/s, while the calmest was 2004 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.5°C | 12.2°C | 13.9°C | 13.6°C | 14.2°C | +1.7°C |
| Avg High | 19.1°C | 18.6°C | 21.0°C | 20.6°C | 21.2°C | +2.1°C |
| Avg Low | 5.8°C | 5.9°C | 6.7°C | 6.6°C | 7.2°C | +1.4°C |
| Avg Rain | 35 mm | 57 mm | 38 mm | 35 mm | 33 mm | -2 mm |
September temperatures in Parkes have risen by about 1.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -1.6°C (1982) to a record high of 35.1°C (2017).
Rainfall in September is about average for rainfall, averaging 40 mm, with a wettest year of 106 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.7°C per decade while lows rose 0.4°C per decade, widening the gap between day and night.
A quieter season to visit Parkes
If your dates are flexible, the more temperate months of March and November tend to be the most comfortable for visiting Parkes. That said, September — with days averaging 20°C and nights around 6.4°C (mean 13.2°C) and moderate rainfall (40 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 22.4°C | 14.8°C | 7.2°C | 31.1°C | 1.5°C | 30 mm | 58% | 2.6 m/s | 5.3 |
| 2024 | 21.5°C | 14.1°C | 6.7°C | 26.2°C | 1.3°C | 11 mm | 59% | 2.4 m/s | 5.3 |
| 2023 🔥 | 25.3°C | 16.8°C | 8.4°C | 33.1°C | 0.7°C | 4 mm | 47% | 2.3 m/s | 5.8 |
| 2022 | 17.3°C | 12.0°C | 6.7°C | 21.0°C | 2.4°C | 77 mm | 79% | 2.4 m/s | 4.4 |
| 2021 | 19.9°C | 13.1°C | 6.3°C | 26.0°C | 0.6°C | 41 mm | 65% | 2.7 m/s | 5.1 |
| 2020 | 20.8°C | 14.3°C | 7.7°C | 27.9°C | 1.4°C | 36 mm | 71% | 2.6 m/s | 5 |
| 2019 | 22.7°C | 14.9°C | 7.1°C | 29.5°C | -0.1°C | 5 mm | 45% | 2.7 m/s | 5.4 |
| 2018 | 21.8°C | 14.2°C | 6.5°C | 29.2°C | 1.4°C | 4 mm | 49% | 2.5 m/s | 5.3 |
| 2017 | 21.7°C | 13.9°C | 6.0°C | 35.1°C | 0.7°C | 5 mm | 48% | 2.8 m/s | 5.1 |
| 2016 | 17.3°C | 12.2°C | 7.0°C | 21.4°C | 2.3°C | 106 mm | 78% | 2.7 m/s | 3.9 |
| 2015 | 20.2°C | 13.0°C | 5.9°C | 26.8°C | 0.8°C | 6 mm | 64% | 2.2 m/s | 5.4 |
| 2014 | 20.4°C | 13.5°C | 6.7°C | 29.5°C | 2.4°C | 24 mm | 65% | 2.5 m/s | 5.3 |
| 2013 | 22.5°C | 15.4°C | 8.2°C | 28.9°C | 3.7°C | 49 mm | 60% | 2.4 m/s | 5.4 |
| 2012 | 20.8°C | 13.2°C | 5.6°C | 29.3°C | 0.8°C | 36 mm | 60% | 2.5 m/s | 5.3 |
| 2011 | 21.3°C | 14.0°C | 6.7°C | 29.0°C | 2.5°C | 44 mm | 60% | 2.8 m/s | 5.2 |
| 2010 | 17.4°C | 11.8°C | 6.1°C | 22.6°C | 0.1°C | 69 mm | 80% | 2.3 m/s | 4.8 |
| 2009 | 21.6°C | 14.5°C | 7.4°C | 28.6°C | 2.8°C | 32 mm | 58% | 2.9 m/s | 4.8 |
| 2008 | 21.1°C | 13.7°C | 6.2°C | 28.5°C | 1.3°C | 55 mm | 61% | 2.6 m/s | 5.6 |
| 2007 | 21.3°C | 13.6°C | 5.8°C | 27.9°C | 2.3°C | 3 mm | 56% | 2.5 m/s | 5.4 |
| 2006 | 23.0°C | 15.1°C | 7.2°C | 28.0°C | 2.8°C | 12 mm | 53% | 2.4 m/s | 5.5 |
| 2005 🌧️ | 19.3°C | 13.1°C | 6.9°C | 27.2°C | 2.0°C | 106 mm | 70% | 2.4 m/s | 4.8 |
| 2004 | 19.6°C | 12.9°C | 6.2°C | 31.0°C | -1.1°C | 38 mm | 69% | 2 m/s | 4.9 |
| 2003 | 19.9°C | 12.6°C | 5.3°C | 31.1°C | -0.5°C | 11 mm | 64% | 2.6 m/s | 5.1 |
| 2002 | 22.0°C | 14.3°C | 6.7°C | 28.7°C | 0.1°C | 49 mm | 51% | 2.7 m/s | 5.2 |
| 2001 | 20.8°C | 14.3°C | 7.8°C | 29.0°C | 2.7°C | 43 mm | 69% | 2.3 m/s | 4.5 |
| 2000 | 21.4°C | 14.5°C | 7.6°C | 30.5°C | 1.5°C | 30 mm | 68% | 2.3 m/s | 5 |
| 1999 | 20.9°C | 14.6°C | 8.4°C | 28.3°C | 1.2°C | 49 mm | 67% | 2.5 m/s | 4.9 |
| 1998 | 18.2°C | 13.0°C | 7.8°C | 26.6°C | 1.4°C | 90 mm | 82% | 2.4 m/s | 4.5 |
| 1997 | 19.2°C | 12.8°C | 6.4°C | 23.6°C | 1.7°C | 85 mm | 72% | 2.2 m/s | 4.8 |
| 1996 | 17.7°C | 11.3°C | 4.9°C | 25.8°C | 0.6°C | 64 mm | 72% | 2.8 m/s | 4.8 |
| 1995 | 19.9°C | 13.2°C | 6.5°C | 27.6°C | -1.1°C | 51 mm | 67% | 2.3 m/s | 4.6 |
| 1994 | 19.6°C | 11.8°C | 4.0°C | 25.6°C | -0.1°C | 14 mm | 54% | 2.6 m/s | 5.5 |
| 1993 | 17.6°C | 11.7°C | 5.9°C | 23.2°C | 0.9°C | 92 mm | 78% | 2.6 m/s | 4.7 |
| 1992 | 16.9°C | 10.6°C | 4.3°C | 25.1°C | -1.3°C | 48 mm | 70% | 2.3 m/s | 4.5 |
| 1991 | 18.5°C | 12.0°C | 5.4°C | 24.7°C | -1.1°C | 40 mm | 68% | 2.6 m/s | 5.2 |
| 1990 | 17.1°C | 11.3°C | 5.5°C | 23.9°C | 1.8°C | 34 mm | 81% | 2.5 m/s | 5 |
| 1989 | 18.4°C | 11.6°C | 4.7°C | 25.7°C | -1.1°C | 12 mm | 74% | 2.4 m/s | 5.1 |
| 1988 | 19.6°C | 13.2°C | 6.9°C | 24.4°C | 1.6°C | 69 mm | 72% | 2.3 m/s | 4.7 |
| 1987 | 19.8°C | 12.7°C | 5.7°C | 28.7°C | -1.1°C | 16 mm | 68% | 2.2 m/s | 5.2 |
| 1986 | 19.0°C | 12.9°C | 6.8°C | 28.1°C | 1.3°C | 38 mm | 71% | 2.4 m/s | 4.7 |
| 1985 | 18.1°C | 11.8°C | 5.5°C | 25.6°C | 1.2°C | 41 mm | 72% | 2.2 m/s | 5 |
| 1984 ❄️ | 16.1°C | 10.1°C | 4.2°C | 21.3°C | -0.5°C | 56 mm | 75% | 2.6 m/s | 4.5 |
| 1983 | 19.2°C | 12.7°C | 6.1°C | 26.0°C | 2.3°C | 52 mm | 75% | 2.5 m/s | — |
| 1982 | 20.6°C | 13.1°C | 5.6°C | 29.9°C | -1.6°C | 18 mm | 50% | 2.7 m/s | — |
| 1981 | 21.3°C | 14.0°C | 6.7°C | 29.7°C | 1.1°C | 14 mm | 68% | 2.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 20°C with lows near 6.4°C (mean 13.2°C), based on 45 years of NASA POWER data.
September averages 40 mm of rainfall in Parkes, about average for rainfall. The wettest on record was 106 mm in 2005.
The hottest September reached 35.1°C in 2017. The coldest dipped to -1.6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.9°C. Daytime highs moved from 19.1°C to 21.3°C and overnight lows from 5.6°C to 7.1°C over the same span.
September is one of the cooler months of the year in Parkes and about average for rainfall, so plan for around 20°C daytime highs and 6.4°C at night.
Not quite — September is the 4th coolest month in Parkes, averaging 13.2°C.
For September in Parkes, pack warm layers and a jacket for chilly mornings, with typical highs of 20°C and lows of 6.4°C.
Relative humidity in September averages 65% — moderately humid.
Average wind speed in September is 2.5 m/s. The windiest September on record averaged 2.9 m/s (2009).
The wettest September on record was 2005 with 106 mm. On average, September sees 40 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 Parkes 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.
