September is one of the cooler months of the year in Alice Springs, with average highs near 29.1°C and lows around 12.1°C (mean 20.6°C). It is one of the drier months, averaging 8 mm of rainfall and 29% relative humidity across the period.
September is one of the cooler months of the year in Alice Springs. Across 45 years of records, the warmest September in Alice Springs was 2013 — when the month averaged 23.9°C — while the coldest was 2010 at 16.5°C. Typical September days reach 29.1°C with nights near 12.1°C. The long-term trend is warming, about 0.2°C per decade.
September is one of the drier months in Alice Springs, averaging 8 mm of rainfall. The wettest September on record was 2010 with 77 mm, while the driest were 2019, 2020 and 2023, among others at 0 mm.
Relative humidity in Alice Springs during September averages 29%. The most humid September was 2010 at 62%, and the least humid was 2019 at 22%.
September receives about 6.5 kWh/m²/day of solar energy in Alice Springs. The sunniest September was 1989 at 7 kWh/m²/day, and the cloudiest was 2010 at 5.5.
Average wind speed in Alice Springs during September is 3.4 m/s. The windiest September was 1985 at 3.9 m/s, while the calmest was 2000 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.7°C | 20.8°C | 21.4°C | 20.1°C | 21.1°C | +1.4°C |
| Avg High | 28.1°C | 29.3°C | 30.0°C | 28.6°C | 29.4°C | +1.3°C |
| Avg Low | 11.3°C | 12.3°C | 12.8°C | 11.5°C | 12.6°C | +1.3°C |
| Avg Rain | 6 mm | 8 mm | 4 mm | 13 mm | 11 mm | +5 mm |
September temperatures in Alice Springs have risen by about 1.1°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 2.4°C (2004) to a record high of 38.9°C (1988).
Rainfall in September is one of the drier months, averaging 8 mm, with a wettest year of 77 mm.
One of the best times to visit Alice Springs
September is one of the best times to visit Alice Springs. Expect days averaging 29.1°C and nights around 12.1°C (mean 20.6°C) — cooler than Alice Springs's yearly average — with low rainfall (8 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 | 28.1°C | 19.5°C | 10.8°C | 35.9°C | 3.1°C | 18 mm | 31% | 3.3 m/s | 6.6 |
| 2024 | 29.2°C | 21.5°C | 13.7°C | 35.2°C | 8.7°C | 14 mm | 34% | 3.8 m/s | 6 |
| 2023 | 30.6°C | 21.7°C | 12.8°C | 35.6°C | 7.8°C | 0 mm | 24% | 3.3 m/s | 6.6 |
| 2022 | 28.2°C | 20.0°C | 11.8°C | 35.3°C | 4.9°C | 11 mm | 35% | 3.6 m/s | 5.9 |
| 2021 | 28.5°C | 20.0°C | 11.5°C | 36.0°C | 4.7°C | 20 mm | 28% | 3.7 m/s | 6.3 |
| 2020 | 32.0°C | 23.6°C | 15.2°C | 35.2°C | 11.3°C | 0 mm | 23% | 3.5 m/s | 6.7 |
| 2019 | 29.7°C | 20.7°C | 11.7°C | 36.5°C | 6.7°C | 0 mm | 22% | 3.3 m/s | 6.7 |
| 2018 | 28.8°C | 20.0°C | 11.1°C | 34.7°C | 7.7°C | 1 mm | 23% | 3.5 m/s | 6.7 |
| 2017 | 30.2°C | 21.1°C | 12.0°C | 38.3°C | 5.6°C | 1 mm | 23% | 3.4 m/s | 6.7 |
| 2016 | 26.8°C | 18.8°C | 10.8°C | 33.3°C | 4.9°C | 32 mm | 44% | 3.5 m/s | 5.6 |
| 2015 | 27.2°C | 18.5°C | 9.7°C | 32.7°C | 4.9°C | 0 mm | 25% | 3.4 m/s | 6.9 |
| 2014 | 30.1°C | 21.1°C | 12.0°C | 37.0°C | 6.5°C | 0 mm | 26% | 3.1 m/s | 6.8 |
| 2013 🔥 | 32.5°C | 23.9°C | 15.3°C | 37.1°C | 10.7°C | 13 mm | 25% | 3 m/s | 6.6 |
| 2012 | 29.6°C | 20.7°C | 11.7°C | 37.0°C | 5.1°C | 5 mm | 24% | 3.3 m/s | 6.6 |
| 2011 | 28.3°C | 19.7°C | 11.1°C | 34.6°C | 4.2°C | 1 mm | 29% | 3.4 m/s | 6.5 |
| 2010 ❄️ 🌧️ | 23.2°C | 16.5°C | 9.7°C | 31.5°C | 3.8°C | 77 mm | 62% | 3.5 m/s | 5.5 |
| 2009 | 30.3°C | 21.8°C | 13.4°C | 36.4°C | 6.2°C | 6 mm | 26% | 3.5 m/s | 6.5 |
| 2008 | 30.2°C | 21.5°C | 12.8°C | 36.2°C | 6.1°C | 12 mm | 28% | 3.4 m/s | 6.4 |
| 2007 | 30.8°C | 22.0°C | 13.2°C | 37.4°C | 6.2°C | 1 mm | 23% | 3.3 m/s | 6.7 |
| 2006 | 29.2°C | 20.8°C | 12.3°C | 35.2°C | 5.1°C | 0 mm | 27% | 3.3 m/s | 6.5 |
| 2005 | 30.7°C | 22.3°C | 14.0°C | 35.6°C | 5.7°C | 6 mm | 32% | 3.3 m/s | 6.2 |
| 2004 | 26.9°C | 18.2°C | 9.5°C | 36.2°C | 2.4°C | 2 mm | 30% | 3.2 m/s | 6.6 |
| 2003 | 31.0°C | 22.4°C | 13.8°C | 37.5°C | 2.9°C | 11 mm | 25% | 3.2 m/s | 6.5 |
| 2002 | 30.7°C | 22.1°C | 13.6°C | 36.6°C | 5.2°C | 1 mm | 23% | 3.7 m/s | 6.4 |
| 2001 | 28.9°C | 20.4°C | 12.0°C | 35.3°C | 4.0°C | 2 mm | 31% | 3.2 m/s | 6.1 |
| 2000 | 30.8°C | 22.0°C | 13.2°C | 38.2°C | 6.2°C | 0 mm | 26% | 2.9 m/s | 6.5 |
| 1999 | 30.3°C | 21.9°C | 13.4°C | 35.7°C | 5.5°C | 6 mm | 27% | 3.2 m/s | 6.5 |
| 1998 | 29.2°C | 20.8°C | 12.5°C | 37.5°C | 6.2°C | 8 mm | 36% | 3.5 m/s | 6.6 |
| 1997 | 31.2°C | 22.8°C | 14.4°C | 35.8°C | 8.1°C | 11 mm | 31% | 3.1 m/s | 6.4 |
| 1996 | 30.6°C | 21.5°C | 12.4°C | 36.5°C | 5.4°C | 1 mm | 23% | 3.5 m/s | 6.8 |
| 1995 | 30.2°C | 21.6°C | 12.9°C | 34.6°C | 7.8°C | 3 mm | 32% | 3.6 m/s | 6 |
| 1994 | 29.3°C | 20.2°C | 11.2°C | 35.1°C | 6.0°C | 0 mm | 23% | 3.1 m/s | 6.8 |
| 1993 | 26.3°C | 18.6°C | 10.9°C | 34.3°C | 4.1°C | 44 mm | 41% | 3.7 m/s | 6.2 |
| 1992 | 28.2°C | 20.2°C | 12.2°C | 33.2°C | 3.2°C | 5 mm | 35% | 3.7 m/s | 6.2 |
| 1991 | 30.6°C | 21.8°C | 13.0°C | 34.7°C | 5.8°C | 4 mm | 25% | 3.3 m/s | 6.7 |
| 1990 | 27.4°C | 18.9°C | 10.4°C | 34.2°C | 4.3°C | 1 mm | 31% | 3.6 m/s | 6.8 |
| 1989 | 28.9°C | 20.1°C | 11.2°C | 36.2°C | 6.1°C | 0 mm | 28% | 3.4 m/s | 7 |
| 1988 | 29.4°C | 20.4°C | 11.3°C | 38.9°C | 6.2°C | 2 mm | 28% | 3.3 m/s | 6.7 |
| 1987 | 27.4°C | 19.0°C | 10.7°C | 34.1°C | 5.7°C | 4 mm | 28% | 3.7 m/s | 6.6 |
| 1986 | 28.3°C | 20.3°C | 12.3°C | 34.6°C | 2.6°C | 9 mm | 38% | 3.3 m/s | 6.6 |
| 1985 | 26.6°C | 18.0°C | 9.4°C | 34.8°C | 3.8°C | 0 mm | 24% | 3.9 m/s | 6.9 |
| 1984 | 25.9°C | 17.7°C | 9.5°C | 32.8°C | 3.3°C | 24 mm | 36% | 3.6 m/s | 6.2 |
| 1983 | 30.6°C | 22.0°C | 13.4°C | 35.6°C | 8.8°C | 0 mm | 27% | 3.4 m/s | — |
| 1982 | 26.1°C | 18.5°C | 10.9°C | 33.6°C | 5.6°C | 11 mm | 35% | 3.3 m/s | — |
| 1981 | 29.4°C | 21.0°C | 12.7°C | 35.2°C | 5.7°C | 5 mm | 27% | 3.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.1°C with lows near 12.1°C (mean 20.6°C), based on 45 years of NASA POWER data.
September averages 8 mm of rainfall in Alice Springs, one of the drier months. The wettest on record was 77 mm in 2010.
The hottest September reached 38.9°C in 1988. The coldest dipped to 2.4°C in 2004.
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 27.7°C to 28.9°C and overnight lows from 11.2°C to 12.1°C over the same span.
September is one of the cooler months of the year in Alice Springs and one of the drier months, so plan for around 29.1°C daytime highs and 12.1°C at night.
Not quite — September is the 5th coolest month in Alice Springs, averaging 20.6°C.
For September in Alice Springs, pack light layers you can adjust through the day, with typical highs of 29.1°C and lows of 12.1°C.
Relative humidity in September averages 29% — relatively dry.
Average wind speed in September is 3.4 m/s. The windiest September on record averaged 3.9 m/s (1985).
The wettest September on record was 2010 with 77 mm. On average, September sees 8 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 Alice Springs 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.
