September is one of the cooler months of the year in Cowra, with average highs near 17.5°C and lows around 5.2°C (mean 11.4°C). It is about average for rainfall, averaging 47 mm of rainfall and 71% relative humidity across the period.
September is one of the cooler months of the year in Cowra. Across 45 years of records, the warmest September in Cowra was 2023 — when the month averaged 14.8°C — while the coldest was 1992 at 8.5°C. Typical September days reach 17.5°C with nights near 5.2°C. The long-term trend is warming, about 0.6°C per decade.
September is about average for rainfall in Cowra, averaging 47 mm of rainfall. The wettest September on record was 2016 with 115 mm, while the driest was 2017 at 5 mm.
Relative humidity in Cowra during September averages 71%. The most humid September was 1998 at 83%, and the least humid was 2023 at 54%.
September receives about 5 kWh/m²/day of solar energy in Cowra. The sunniest September was 2023 at 5.8 kWh/m²/day, and the cloudiest was 2016 at 3.9.
Average wind speed in Cowra during September is 2.2 m/s. The windiest September was 2017 at 2.8 m/s, while the calmest were 1985 and 2004 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.5°C | 10.5°C | 12.0°C | 11.8°C | 12.4°C | +1.9°C |
| Avg High | 16.4°C | 16.2°C | 18.4°C | 18.1°C | 18.9°C | +2.5°C |
| Avg Low | 4.7°C | 4.8°C | 5.5°C | 5.4°C | 5.9°C | +1.2°C |
| Avg Rain | 48 mm | 66 mm | 44 mm | 36 mm | 34 mm | -14 mm |
September temperatures in Cowra have risen by about 2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -2.1°C (1984) to a record high of 32.1°C (2017).
Rainfall in September is about average for rainfall, averaging 47 mm, with a wettest year of 115 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
A quieter season to visit Cowra
If your dates are flexible, the more temperate months of December and February tend to be the most comfortable for visiting Cowra. That said, September — with days averaging 17.5°C and nights around 5.2°C (mean 11.4°C) and moderate rainfall (47 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 | 20.0°C | 13.0°C | 5.9°C | 28.2°C | 0.5°C | 39 mm | 63% | 2.4 m/s | 5.3 |
| 2024 | 19.3°C | 12.4°C | 5.5°C | 24.2°C | -0.1°C | 20 mm | 62% | 2.4 m/s | 5.3 |
| 2023 🔥 | 22.5°C | 14.8°C | 7.0°C | 30.5°C | 0.0°C | 8 mm | 54% | 2 m/s | 5.8 |
| 2022 | 15.9°C | 11.0°C | 6.0°C | 19.8°C | 1.2°C | 70 mm | 81% | 2.2 m/s | 4.4 |
| 2021 | 17.3°C | 11.0°C | 4.8°C | 23.2°C | 0.7°C | 44 mm | 72% | 2.3 m/s | 5.1 |
| 2020 | 18.6°C | 12.5°C | 6.4°C | 26.0°C | 0.3°C | 23 mm | 74% | 2.2 m/s | 5 |
| 2019 | 20.0°C | 12.9°C | 5.8°C | 26.1°C | -0.6°C | 14 mm | 54% | 2.4 m/s | 5.4 |
| 2018 | 19.4°C | 12.2°C | 4.9°C | 25.5°C | 0.1°C | 8 mm | 57% | 2.1 m/s | 5.3 |
| 2017 | 19.1°C | 12.0°C | 4.8°C | 32.1°C | -0.6°C | 5 mm | 54% | 2.8 m/s | 5.1 |
| 2016 🌧️ | 15.2°C | 10.7°C | 6.1°C | 19.6°C | 2.7°C | 115 mm | 82% | 2.3 m/s | 3.9 |
| 2015 | 17.4°C | 11.1°C | 4.7°C | 23.1°C | -0.2°C | 9 mm | 72% | 1.9 m/s | 5.4 |
| 2014 | 17.9°C | 11.6°C | 5.3°C | 26.0°C | 1.4°C | 34 mm | 71% | 2.1 m/s | 5.3 |
| 2013 | 19.7°C | 13.3°C | 6.9°C | 25.5°C | 3.1°C | 36 mm | 65% | 2.2 m/s | 5.4 |
| 2012 | 17.9°C | 11.2°C | 4.6°C | 24.6°C | 0.3°C | 39 mm | 67% | 2.2 m/s | 5.3 |
| 2011 | 18.9°C | 12.2°C | 5.5°C | 27.2°C | 1.4°C | 35 mm | 65% | 2.5 m/s | 5.2 |
| 2010 | 15.8°C | 10.6°C | 5.3°C | 20.0°C | 0.1°C | 68 mm | 81% | 2.1 m/s | 4.8 |
| 2009 | 18.9°C | 12.6°C | 6.2°C | 26.0°C | 1.8°C | 37 mm | 64% | 2.7 m/s | 4.8 |
| 2008 | 19.1°C | 12.1°C | 5.2°C | 26.2°C | 0.3°C | 35 mm | 63% | 2.4 m/s | 5.6 |
| 2007 | 18.7°C | 11.7°C | 4.7°C | 26.3°C | 1.5°C | 8 mm | 61% | 2.4 m/s | 5.4 |
| 2006 | 20.5°C | 13.3°C | 6.1°C | 25.6°C | 1.8°C | 18 mm | 57% | 2.3 m/s | 5.5 |
| 2005 | 16.8°C | 11.1°C | 5.4°C | 23.5°C | 1.3°C | 108 mm | 77% | 2 m/s | 4.8 |
| 2004 | 17.1°C | 11.2°C | 5.3°C | 27.0°C | -1.1°C | 49 mm | 74% | 1.8 m/s | 4.9 |
| 2003 | 16.8°C | 10.6°C | 4.3°C | 26.7°C | -1.1°C | 31 mm | 71% | 2.5 m/s | 5.1 |
| 2002 | 19.3°C | 12.3°C | 5.3°C | 25.7°C | -0.7°C | 58 mm | 56% | 2.5 m/s | 5.2 |
| 2001 | 18.6°C | 12.6°C | 6.6°C | 26.6°C | 2.6°C | 52 mm | 75% | 2 m/s | 4.5 |
| 2000 | 17.8°C | 12.0°C | 6.3°C | 26.4°C | 1.4°C | 40 mm | 77% | 2.1 m/s | 5 |
| 1999 | 18.7°C | 12.8°C | 6.9°C | 24.8°C | 1.3°C | 55 mm | 72% | 2.1 m/s | 4.9 |
| 1998 | 16.8°C | 11.7°C | 6.6°C | 24.2°C | 0.8°C | 82 mm | 83% | 2 m/s | 4.5 |
| 1997 | 16.2°C | 11.0°C | 5.7°C | 19.2°C | 1.6°C | 92 mm | 79% | 2 m/s | 4.8 |
| 1996 | 15.1°C | 9.6°C | 4.1°C | 23.3°C | 0.8°C | 84 mm | 78% | 2.7 m/s | 4.8 |
| 1995 | 16.8°C | 10.9°C | 4.9°C | 23.1°C | -1.5°C | 71 mm | 75% | 2 m/s | 4.6 |
| 1994 | 17.3°C | 10.1°C | 3.0°C | 24.2°C | -0.9°C | 17 mm | 59% | 2.5 m/s | 5.5 |
| 1993 | 15.9°C | 10.3°C | 4.8°C | 21.3°C | -0.5°C | 101 mm | 81% | 2.2 m/s | 4.7 |
| 1992 ❄️ | 13.7°C | 8.5°C | 3.3°C | 21.0°C | -1.5°C | 56 mm | 80% | 2.2 m/s | 4.5 |
| 1991 | 15.4°C | 9.9°C | 4.4°C | 21.7°C | -1.4°C | 56 mm | 76% | 2.5 m/s | 5.2 |
| 1990 | 15.6°C | 10.1°C | 4.6°C | 23.4°C | 1.7°C | 45 mm | 82% | 2 m/s | 5 |
| 1989 | 15.6°C | 9.6°C | 3.6°C | 22.3°C | -1.0°C | 20 mm | 80% | 2.1 m/s | 5.1 |
| 1988 | 16.8°C | 11.3°C | 5.7°C | 20.7°C | 0.8°C | 88 mm | 78% | 2.2 m/s | 4.7 |
| 1987 | 17.1°C | 11.0°C | 4.9°C | 26.7°C | -1.2°C | 23 mm | 74% | 2 m/s | 5.2 |
| 1986 | 16.2°C | 10.8°C | 5.4°C | 24.5°C | 0.9°C | 59 mm | 78% | 2.2 m/s | 4.7 |
| 1985 | 15.6°C | 9.8°C | 4.1°C | 22.5°C | -0.8°C | 57 mm | 78% | 1.8 m/s | 5 |
| 1984 | 13.7°C | 8.6°C | 3.5°C | 19.9°C | -2.1°C | 65 mm | 81% | 2.3 m/s | 4.5 |
| 1983 | 16.6°C | 10.8°C | 5.0°C | 22.2°C | 1.4°C | 62 mm | 80% | 2.4 m/s | — |
| 1982 | 18.0°C | 11.1°C | 4.2°C | 26.0°C | -1.5°C | 37 mm | 60% | 2.5 m/s | — |
| 1981 | 17.9°C | 11.8°C | 5.7°C | 25.3°C | 1.2°C | 23 mm | 76% | 1.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 17.5°C with lows near 5.2°C (mean 11.4°C), based on 45 years of NASA POWER data.
September averages 47 mm of rainfall in Cowra, about average for rainfall. The wettest on record was 115 mm in 2016.
The hottest September reached 32.1°C in 2017. The coldest dipped to -2.1°C in 1984.
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 16.4°C to 19°C and overnight lows from 4.5°C to 5.8°C over the same span.
September is one of the cooler months of the year in Cowra and about average for rainfall, so plan for around 17.5°C daytime highs and 5.2°C at night.
Not quite — September is the 4th coolest month in Cowra, averaging 11.4°C.
For September in Cowra, pack warm layers and a jacket for chilly mornings, with typical highs of 17.5°C and lows of 5.2°C.
Relative humidity in September averages 71% — moderately humid.
Average wind speed in September is 2.2 m/s. The windiest September on record averaged 2.8 m/s (2017).
The wettest September on record was 2016 with 115 mm. On average, September sees 47 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 Cowra 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.
