September is one of the cooler months of the year in Smithton, with average highs near 12.4°C and lows around 7.1°C (mean 9.8°C). It is a relatively wet time of year, averaging 119 mm of rainfall and 84% relative humidity across the period.
September is one of the cooler months of the year in Smithton. Across 45 years of records, the warmest Septembers in Smithton were 2001 and 2023 — when the month averaged 11.1°C — while the coldest were 1992 and 1994 at 8.2°C. Typical September days reach 12.4°C with nights near 7.1°C. The long-term trend is warming, about 0.2°C per decade.
September is a relatively wet time of year in Smithton, averaging 119 mm of rainfall. The wettest September on record was 1996 with 227 mm, while the driest was 2015 at 30 mm.
Relative humidity in Smithton during September averages 84%. The most humid September was 2004 at 87%, and the least humid was 2025 at 81%.
September receives about 3.8 kWh/m²/day of solar energy in Smithton. The sunniest September was 1985 at 4.4 kWh/m²/day, and the cloudiest was 2017 at 3.4.
Average wind speed in Smithton during September is 3 m/s. The windiest September was 2003 at 3.9 m/s, while the calmest was 2015 at 2.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.7°C | 9.2°C | 10.0°C | 9.9°C | 10.1°C | +0.4°C |
| Avg High | 12.5°C | 11.9°C | 12.6°C | 12.5°C | 12.8°C | +0.3°C |
| Avg Low | 7.0°C | 6.5°C | 7.5°C | 7.3°C | 7.5°C | +0.5°C |
| Avg Rain | 118 mm | 132 mm | 144 mm | 104 mm | 84 mm | -34 mm |
September temperatures in Smithton have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 1.3°C (1990) to a record high of 19°C (1987).
Rainfall in September is a relatively wet time of year, averaging 119 mm, with a wettest year of 227 mm.
A quieter season to visit Smithton
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Smithton. That said, September — with days averaging 12.4°C and nights around 7.1°C (mean 9.8°C) and higher rainfall (119 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 | 12.5°C | 10.1°C | 7.7°C | 16.7°C | 4.5°C | 135 mm | 81% | 3.6 m/s | 3.9 |
| 2024 | 12.2°C | 9.9°C | 7.6°C | 15.3°C | 3.4°C | 103 mm | 82% | 3.7 m/s | 3.5 |
| 2023 | 14.0°C | 11.1°C | 8.2°C | 18.6°C | 4.6°C | 53 mm | 82% | 2.8 m/s | 4 |
| 2022 | 12.9°C | 10.1°C | 7.3°C | 17.5°C | 4.1°C | 67 mm | 84% | 2.5 m/s | 3.8 |
| 2021 | 12.6°C | 9.6°C | 6.7°C | 17.9°C | 3.4°C | 80 mm | 81% | 3.1 m/s | 3.8 |
| 2020 | 12.4°C | 10.0°C | 7.6°C | 15.8°C | 4.7°C | 66 mm | 84% | 3 m/s | 3.8 |
| 2019 | 12.3°C | 9.7°C | 7.1°C | 16.5°C | 3.1°C | 55 mm | 82% | 2.8 m/s | 3.8 |
| 2018 | 12.5°C | 9.8°C | 7.0°C | 15.8°C | 2.8°C | 49 mm | 81% | 3 m/s | 4.1 |
| 2017 | 11.5°C | 9.2°C | 7.0°C | 15.6°C | 4.5°C | 113 mm | 82% | 3.4 m/s | 3.4 |
| 2016 | 12.7°C | 10.1°C | 7.5°C | 15.9°C | 2.9°C | 116 mm | 86% | 2.4 m/s | 3.8 |
| 2015 | 12.9°C | 9.8°C | 6.7°C | 17.5°C | 3.1°C | 30 mm | 85% | 2.2 m/s | 4.2 |
| 2014 | 13.4°C | 10.5°C | 7.6°C | 18.5°C | 3.6°C | 102 mm | 84% | 2.7 m/s | 4 |
| 2013 | 13.1°C | 10.8°C | 8.5°C | 16.7°C | 3.8°C | 157 mm | 85% | 3.2 m/s | 3.5 |
| 2012 | 12.2°C | 9.8°C | 7.3°C | 15.8°C | 3.8°C | 161 mm | 85% | 3.1 m/s | 3.5 |
| 2011 | 12.8°C | 10.1°C | 7.4°C | 17.3°C | 4.1°C | 104 mm | 83% | 3 m/s | 4.1 |
| 2010 | 11.3°C | 9.1°C | 6.8°C | 14.1°C | 3.0°C | 154 mm | 84% | 3.5 m/s | 3.7 |
| 2009 | 12.6°C | 10.3°C | 8.0°C | 16.3°C | 5.6°C | 167 mm | 84% | 3.2 m/s | 3.5 |
| 2008 | 12.4°C | 9.8°C | 7.2°C | 15.7°C | 3.8°C | 136 mm | 81% | 3.2 m/s | 3.6 |
| 2007 | 12.9°C | 10.1°C | 7.3°C | 16.2°C | 3.4°C | 147 mm | 83% | 3.2 m/s | 3.8 |
| 2006 | 12.6°C | 9.8°C | 7.0°C | 16.6°C | 3.9°C | 115 mm | 83% | 2.9 m/s | 4 |
| 2005 | 13.1°C | 10.3°C | 7.5°C | 17.5°C | 3.5°C | 131 mm | 85% | 2.5 m/s | 3.8 |
| 2004 | 12.4°C | 10.0°C | 7.6°C | 16.6°C | 4.1°C | 95 mm | 87% | 2.7 m/s | 3.8 |
| 2003 | 11.0°C | 8.7°C | 6.3°C | 13.8°C | 2.9°C | 185 mm | 82% | 3.9 m/s | 3.8 |
| 2002 | 12.3°C | 9.8°C | 7.4°C | 17.5°C | 4.5°C | 164 mm | 82% | 3.8 m/s | 3.8 |
| 2001 🔥 | 13.9°C | 11.1°C | 8.3°C | 18.4°C | 4.1°C | 132 mm | 85% | 2.6 m/s | 3.9 |
| 2000 | 12.5°C | 10.2°C | 8.0°C | 15.6°C | 4.6°C | 170 mm | 84% | 3.7 m/s | 3.5 |
| 1999 | 13.4°C | 10.6°C | 7.7°C | 17.7°C | 2.8°C | 89 mm | 84% | 2.6 m/s | 3.8 |
| 1998 | 13.0°C | 10.4°C | 7.7°C | 16.1°C | 4.1°C | 167 mm | 84% | 3 m/s | 3.9 |
| 1997 | 12.4°C | 9.5°C | 6.6°C | 14.4°C | 2.8°C | 104 mm | 86% | 2.5 m/s | 4 |
| 1996 🌧️ | 10.9°C | 8.7°C | 6.5°C | 14.2°C | 2.9°C | 227 mm | 84% | 3.4 m/s | 3.6 |
| 1995 | 11.4°C | 8.7°C | 6.0°C | 14.1°C | 2.6°C | 98 mm | 84% | 2.8 m/s | 3.8 |
| 1994 | 10.6°C | 8.2°C | 5.8°C | 14.8°C | 2.4°C | 122 mm | 84% | 3.1 m/s | 3.9 |
| 1993 | 12.7°C | 9.6°C | 6.5°C | 18.4°C | 2.0°C | 104 mm | 85% | 2.5 m/s | 4 |
| 1992 ❄️ | 10.8°C | 8.2°C | 5.6°C | 13.1°C | 2.4°C | 156 mm | 84% | 2.6 m/s | 3.7 |
| 1991 | 11.4°C | 8.9°C | 6.4°C | 14.4°C | 3.1°C | 137 mm | 87% | 2.8 m/s | 3.7 |
| 1990 | 12.6°C | 9.5°C | 6.4°C | 16.5°C | 1.3°C | 114 mm | 84% | 2.7 m/s | 3.9 |
| 1989 | 12.3°C | 9.6°C | 6.9°C | 15.7°C | 3.1°C | 144 mm | 86% | 2.7 m/s | 4.1 |
| 1988 | 13.4°C | 10.7°C | 8.0°C | 16.8°C | 3.8°C | 132 mm | 85% | 2.9 m/s | 3.7 |
| 1987 | 13.1°C | 10.0°C | 7.0°C | 19.0°C | 3.7°C | 93 mm | 85% | 2.8 m/s | 4.1 |
| 1986 | 11.9°C | 9.4°C | 7.0°C | 14.9°C | 3.2°C | 135 mm | 85% | 2.8 m/s | 3.7 |
| 1985 | 12.8°C | 9.5°C | 6.3°C | 16.1°C | 2.8°C | 47 mm | 83% | 2.3 m/s | 4.4 |
| 1984 | 11.5°C | 9.0°C | 6.5°C | 14.6°C | 2.9°C | 160 mm | 85% | 2.7 m/s | 3.8 |
| 1983 | 12.1°C | 9.6°C | 7.2°C | 15.9°C | 2.5°C | 129 mm | 83% | 3.2 m/s | — |
| 1982 | 12.4°C | 9.4°C | 6.4°C | 16.7°C | 3.3°C | 117 mm | 83% | 3 m/s | — |
| 1981 | 13.0°C | 10.5°C | 8.0°C | 15.1°C | 4.3°C | 101 mm | 85% | 3.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 12.4°C with lows near 7.1°C (mean 9.8°C), based on 45 years of NASA POWER data.
September averages 119 mm of rainfall in Smithton, a relatively wet time of year. The wettest on record was 227 mm in 1996.
The hottest September reached 19°C in 1987. The coldest dipped to 1.3°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.6°C. Daytime highs moved from 12.4°C to 12.8°C and overnight lows from 6.9°C to 7.5°C over the same span.
September is one of the cooler months of the year in Smithton and a relatively wet time of year, so plan for around 12.4°C daytime highs and 7.1°C at night.
Not quite — September is the 4th coolest month in Smithton, averaging 9.8°C.
For September in Smithton, pack warm layers and a jacket for chilly mornings, with typical highs of 12.4°C and lows of 7.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 84% — quite humid.
Average wind speed in September is 3 m/s. The windiest September on record averaged 3.9 m/s (2003).
The wettest September on record was 1996 with 227 mm. On average, September sees 119 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 Smithton 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.
