September is one of the cooler months of the year in Nowra, with average highs near 18.6°C and lows around 10.9°C (mean 14.8°C). It is one of the drier months, averaging 65 mm of rainfall and 70% relative humidity across the period.
September is one of the cooler months of the year in Nowra. Across 45 years of records, the warmest September in Nowra was 2023 — when the month averaged 17.7°C — while the coldest was 1984 at 12.6°C. Typical September days reach 18.6°C with nights near 10.9°C. The long-term trend is warming, about 0.4°C per decade.
September is one of the drier months in Nowra, averaging 65 mm of rainfall. The wettest September on record was 1995 with 178 mm, while the driest was 2017 at 2 mm.
Relative humidity in Nowra during September averages 70%. The most humid September was 2022 at 80%, and the least humid was 2017 at 53%.
September receives about 4.8 kWh/m²/day of solar energy in Nowra. The sunniest Septembers were 1994, 2017 and 2023 at 5.4 kWh/m²/day, and the cloudiest was 2022 at 4.
Average wind speed in Nowra during September is 1.6 m/s. The windiest September was 2003 at 1.9 m/s, while the calmest were 1981 and 2023 at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.0°C | 13.9°C | 15.4°C | 15.0°C | 15.5°C | +1.5°C |
| Avg High | 17.8°C | 17.5°C | 19.4°C | 19.0°C | 19.3°C | +1.5°C |
| Avg Low | 10.2°C | 10.3°C | 11.3°C | 11.1°C | 11.6°C | +1.4°C |
| Avg Rain | 72 mm | 91 mm | 53 mm | 49 mm | 58 mm | -14 mm |
September temperatures in Nowra have risen by about 1.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 5°C (1987) to a record high of 31.6°C (2023).
Rainfall in September is one of the drier months, averaging 65 mm, with a wettest year of 178 mm.
A good time to visit Nowra
September is a good time to visit Nowra, with days averaging 18.6°C and nights around 10.9°C (mean 14.8°C, cooler than Nowra's yearly average) and moderate rainfall. January and February are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 19.1°C | 15.4°C | 11.6°C | 23.7°C | 8.4°C | 107 mm | 71% | 1.6 m/s | 5.1 |
| 2024 | 20.1°C | 15.9°C | 11.7°C | 25.3°C | 6.8°C | 26 mm | 60% | 1.7 m/s | 4.9 |
| 2023 🔥 | 22.6°C | 17.7°C | 12.7°C | 31.6°C | 8.1°C | 21 mm | 58% | 1.4 m/s | 5.4 |
| 2022 | 16.7°C | 14.1°C | 11.5°C | 19.7°C | 8.4°C | 136 mm | 80% | 1.8 m/s | 4 |
| 2021 | 19.0°C | 15.0°C | 10.9°C | 23.9°C | 8.1°C | 42 mm | 67% | 1.7 m/s | 4.8 |
| 2020 | 18.6°C | 15.0°C | 11.3°C | 23.2°C | 7.3°C | 13 mm | 76% | 1.5 m/s | 4.7 |
| 2019 | 19.8°C | 15.5°C | 11.2°C | 26.3°C | 8.5°C | 51 mm | 63% | 1.7 m/s | 4.8 |
| 2018 | 19.2°C | 14.8°C | 10.5°C | 27.6°C | 7.7°C | 27 mm | 64% | 1.5 m/s | 4.9 |
| 2017 | 20.7°C | 15.9°C | 11.2°C | 31.3°C | 6.9°C | 2 mm | 53% | 1.8 m/s | 5.4 |
| 2016 | 18.3°C | 15.0°C | 11.7°C | 20.8°C | 9.1°C | 60 mm | 75% | 1.6 m/s | 4.2 |
| 2015 | 17.1°C | 13.9°C | 10.7°C | 22.1°C | 7.0°C | 53 mm | 77% | 1.7 m/s | 4.7 |
| 2014 | 18.1°C | 14.6°C | 11.2°C | 26.0°C | 7.8°C | 44 mm | 74% | 1.6 m/s | 4.8 |
| 2013 | 19.9°C | 15.8°C | 11.8°C | 25.3°C | 7.9°C | 92 mm | 72% | 1.6 m/s | 5.1 |
| 2012 | 19.8°C | 15.3°C | 10.7°C | 26.7°C | 6.7°C | 26 mm | 65% | 1.5 m/s | 5.1 |
| 2011 | 18.6°C | 14.8°C | 11.1°C | 24.5°C | 7.4°C | 56 mm | 70% | 1.7 m/s | 4.6 |
| 2010 | 18.1°C | 14.4°C | 10.8°C | 22.6°C | 7.4°C | 76 mm | 71% | 1.6 m/s | 4.6 |
| 2009 | 20.9°C | 16.3°C | 11.7°C | 28.1°C | 7.1°C | 33 mm | 62% | 1.6 m/s | 5 |
| 2008 | 19.4°C | 15.0°C | 10.6°C | 26.8°C | 5.9°C | 56 mm | 66% | 1.5 m/s | 5 |
| 2007 | 18.0°C | 14.4°C | 10.9°C | 23.2°C | 7.8°C | 35 mm | 70% | 1.7 m/s | 5 |
| 2006 | 19.1°C | 15.5°C | 11.8°C | 25.2°C | 9.2°C | 74 mm | 72% | 1.7 m/s | 5 |
| 2005 | 18.5°C | 14.7°C | 10.9°C | 24.3°C | 7.8°C | 76 mm | 72% | 1.7 m/s | 4.5 |
| 2004 | 19.3°C | 15.1°C | 10.8°C | 24.8°C | 7.2°C | 89 mm | 70% | 1.5 m/s | 4.5 |
| 2003 | 18.7°C | 14.7°C | 10.8°C | 27.8°C | 6.2°C | 18 mm | 62% | 1.9 m/s | 5.2 |
| 2002 | 20.7°C | 16.1°C | 11.4°C | 28.4°C | 8.2°C | 23 mm | 58% | 1.7 m/s | 5 |
| 2001 | 19.4°C | 15.8°C | 12.2°C | 24.9°C | 9.4°C | 68 mm | 76% | 1.6 m/s | 4.4 |
| 2000 | 20.4°C | 16.1°C | 11.7°C | 28.2°C | 7.3°C | 60 mm | 66% | 1.7 m/s | 4.8 |
| 1999 | 18.8°C | 15.3°C | 11.7°C | 23.7°C | 8.0°C | 60 mm | 75% | 1.6 m/s | 4.5 |
| 1998 | 18.8°C | 15.6°C | 12.4°C | 24.2°C | 7.8°C | 59 mm | 80% | 1.7 m/s | 4.5 |
| 1997 | 16.6°C | 13.8°C | 11.0°C | 20.5°C | 7.6°C | 171 mm | 79% | 1.7 m/s | 4.2 |
| 1996 | 17.8°C | 14.1°C | 10.4°C | 23.2°C | 7.9°C | 57 mm | 69% | 1.8 m/s | 4.8 |
| 1995 🌧️ | 17.1°C | 13.6°C | 10.0°C | 25.5°C | 5.9°C | 178 mm | 74% | 1.6 m/s | 4.3 |
| 1994 | 18.7°C | 14.0°C | 9.3°C | 24.3°C | 5.7°C | 22 mm | 59% | 1.6 m/s | 5.4 |
| 1993 | 17.1°C | 13.6°C | 10.1°C | 24.2°C | 7.5°C | 126 mm | 76% | 1.7 m/s | 4.6 |
| 1992 | 17.1°C | 13.1°C | 9.0°C | 22.3°C | 5.8°C | 55 mm | 69% | 1.7 m/s | 4.5 |
| 1991 | 17.0°C | 13.2°C | 9.5°C | 20.8°C | 5.3°C | 24 mm | 72% | 1.8 m/s | 5 |
| 1990 | 16.2°C | 13.1°C | 10.0°C | 22.8°C | 7.8°C | 156 mm | 80% | 1.7 m/s | 4.4 |
| 1989 | 16.9°C | 13.0°C | 9.2°C | 21.6°C | 6.7°C | 20 mm | 76% | 1.7 m/s | 5.1 |
| 1988 | 17.9°C | 14.5°C | 11.2°C | 21.9°C | 7.4°C | 81 mm | 76% | 1.6 m/s | 4.5 |
| 1987 | 18.4°C | 14.1°C | 9.8°C | 26.5°C | 5.0°C | 28 mm | 72% | 1.5 m/s | 5 |
| 1986 | 17.3°C | 13.9°C | 10.4°C | 23.0°C | 7.6°C | 102 mm | 76% | 1.6 m/s | 4.6 |
| 1985 | 16.4°C | 13.3°C | 10.1°C | 21.0°C | 7.6°C | 176 mm | 78% | 1.7 m/s | 4.7 |
| 1984 ❄️ | 15.9°C | 12.6°C | 9.3°C | 18.7°C | 6.6°C | 56 mm | 76% | 1.7 m/s | 4.4 |
| 1983 | 18.7°C | 14.6°C | 10.5°C | 26.5°C | 6.2°C | 38 mm | 70% | 1.6 m/s | — |
| 1982 | 17.9°C | 14.0°C | 10.1°C | 26.1°C | 6.2°C | 137 mm | 66% | 1.8 m/s | — |
| 1981 | 21.0°C | 16.0°C | 11.0°C | 29.6°C | 7.0°C | 8 mm | 65% | 1.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 18.6°C with lows near 10.9°C (mean 14.8°C), based on 45 years of NASA POWER data.
September averages 65 mm of rainfall in Nowra, one of the drier months. The wettest on record was 178 mm in 1995.
The hottest September reached 31.6°C in 2023. The coldest dipped to 5°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.5°C. Daytime highs moved from 18°C to 19.5°C and overnight lows from 10.2°C to 11.7°C over the same span.
September is one of the cooler months of the year in Nowra and one of the drier months, so plan for around 18.6°C daytime highs and 10.9°C at night.
Not quite — September is the 4th coolest month in Nowra, averaging 14.8°C.
For September in Nowra, pack light layers you can adjust through the day, with typical highs of 18.6°C and lows of 10.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 70% — moderately humid.
Average wind speed in September is 1.6 m/s. The windiest September on record averaged 1.9 m/s (2003).
The wettest September on record was 1995 with 178 mm. On average, September sees 65 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 Nowra 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.
