September is one of the warmer months of the year in Auburn, with average highs near 31.1°C and lows around 18.4°C (mean 24.8°C). It is one of the drier months, averaging 90 mm of rainfall and 71% relative humidity across the period.
September is one of the warmer months of the year in Auburn. Across 45 years of records, the warmest September in Auburn was 2019 — when the month averaged 28.6°C — while the coldest was 1983 at 21.8°C. Typical September days reach 31.1°C with nights near 18.4°C. The long-term trend is warming, about 0.4°C per decade.
September is one of the drier months in Auburn, averaging 90 mm of rainfall. The wettest September on record was 1988 with 234 mm, while the driest was 2019 at 18 mm.
Relative humidity in Auburn during September averages 71%. The most humid September was 2009 at 84%, and the least humid was 1990 at 55%.
September receives about 4.9 kWh/m²/day of solar energy in Auburn. The sunniest September was 2019 at 5.8 kWh/m²/day, and the cloudiest was 1988 at 3.8.
Average wind speed in Auburn during September is 0.4 m/s. The windiest September was 2004 at 0.6 m/s, while the calmest were 1986 and 2014 at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.9°C | 24.8°C | 24.3°C | 25.7°C | 25.0°C | +1.1°C |
| Avg High | 30.1°C | 31.4°C | 30.3°C | 32.2°C | 31.4°C | +1.3°C |
| Avg Low | 17.6°C | 18.2°C | 18.3°C | 19.1°C | 18.7°C | +1.1°C |
| Avg Rain | 99 mm | 88 mm | 97 mm | 71 mm | 99 mm | 0 mm |
September temperatures in Auburn have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 6.2°C (1983) to a record high of 39.8°C (2019).
Rainfall in September is one of the drier months, averaging 90 mm, with a wettest year of 234 mm.
One of the best times to visit Auburn
September is one of the best times to visit Auburn. Expect days averaging 31.1°C and nights around 18.4°C (mean 24.8°C) — warmer than Auburn's yearly average — with higher rainfall (90 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 | 33.9°C | 26.4°C | 18.9°C | 37.0°C | 15.8°C | 42 mm | 61% | 0.4 m/s | 5.4 |
| 2024 | 31.4°C | 25.7°C | 19.9°C | 37.6°C | 17.0°C | 224 mm | 73% | 0.5 m/s | 4.3 |
| 2023 | 33.0°C | 25.8°C | 18.7°C | 37.2°C | 14.0°C | 39 mm | 66% | 0.4 m/s | 5.1 |
| 2022 | 30.8°C | 24.1°C | 17.5°C | 36.9°C | 10.0°C | 58 mm | 69% | 0.4 m/s | 5.3 |
| 2021 | 29.4°C | 23.9°C | 18.3°C | 33.7°C | 9.7°C | 92 mm | 78% | 0.4 m/s | 4.9 |
| 2020 | 29.9°C | 24.3°C | 18.7°C | 37.1°C | 9.2°C | 139 mm | 74% | 0.5 m/s | 4.5 |
| 2019 🔥 | 36.3°C | 28.6°C | 21.0°C | 39.8°C | 16.8°C | 18 mm | 58% | 0.4 m/s | 5.8 |
| 2018 | 33.1°C | 27.3°C | 21.4°C | 37.2°C | 19.0°C | 85 mm | 75% | 0.4 m/s | 5.1 |
| 2017 | 29.8°C | 23.5°C | 17.2°C | 33.9°C | 11.2°C | 105 mm | 73% | 0.4 m/s | 5.3 |
| 2016 | 33.9°C | 27.1°C | 20.2°C | 36.8°C | 11.3°C | 36 mm | 66% | 0.4 m/s | 5.4 |
| 2015 | 30.4°C | 24.5°C | 18.6°C | 37.2°C | 11.1°C | 75 mm | 73% | 0.4 m/s | 4.5 |
| 2014 | 32.4°C | 26.1°C | 19.9°C | 36.9°C | 13.3°C | 52 mm | 70% | 0.3 m/s | 4.7 |
| 2013 | 31.3°C | 25.0°C | 18.7°C | 34.6°C | 14.0°C | 48 mm | 75% | 0.4 m/s | 5.1 |
| 2012 | 30.3°C | 24.1°C | 17.8°C | 35.0°C | 9.9°C | 121 mm | 72% | 0.4 m/s | 4.9 |
| 2011 | 29.9°C | 23.5°C | 17.1°C | 36.5°C | 12.6°C | 125 mm | 71% | 0.4 m/s | 4.7 |
| 2010 | 34.6°C | 26.8°C | 19.0°C | 38.6°C | 12.1°C | 42 mm | 59% | 0.4 m/s | 5.7 |
| 2009 | 28.3°C | 23.8°C | 19.3°C | 32.5°C | 9.3°C | 175 mm | 84% | 0.4 m/s | 4.2 |
| 2008 | 29.2°C | 23.5°C | 17.9°C | 31.8°C | 10.5°C | 45 mm | 79% | 0.4 m/s | 5.1 |
| 2007 | 32.2°C | 25.5°C | 18.8°C | 36.3°C | 11.8°C | 71 mm | 68% | 0.4 m/s | 5 |
| 2006 | 30.3°C | 23.8°C | 17.2°C | 35.6°C | 9.6°C | 78 mm | 69% | 0.4 m/s | 5 |
| 2005 | 33.0°C | 26.2°C | 19.3°C | 36.7°C | 15.9°C | 48 mm | 68% | 0.4 m/s | 5.4 |
| 2004 | 28.6°C | 23.4°C | 18.2°C | 32.9°C | 12.5°C | 203 mm | 79% | 0.6 m/s | 4.5 |
| 2003 | 28.5°C | 22.6°C | 16.8°C | 32.9°C | 7.3°C | 70 mm | 79% | 0.4 m/s | 5.2 |
| 2002 | 32.3°C | 26.6°C | 20.9°C | 38.0°C | 17.3°C | 129 mm | 72% | 0.5 m/s | 4 |
| 2001 | 29.9°C | 23.2°C | 16.6°C | 34.1°C | 7.2°C | 57 mm | 69% | 0.4 m/s | 5 |
| 2000 | 30.8°C | 24.3°C | 17.7°C | 35.5°C | 10.1°C | 93 mm | 70% | 0.4 m/s | 4.4 |
| 1999 | 32.1°C | 24.3°C | 16.5°C | 37.9°C | 7.2°C | 37 mm | 58% | 0.4 m/s | 5 |
| 1998 | 31.9°C | 25.9°C | 19.8°C | 38.2°C | 14.6°C | 212 mm | 69% | 0.5 m/s | 4.5 |
| 1997 | 33.1°C | 25.7°C | 18.3°C | 37.8°C | 12.2°C | 69 mm | 63% | 0.4 m/s | 5.1 |
| 1996 | 29.2°C | 23.2°C | 17.2°C | 34.0°C | 12.3°C | 150 mm | 76% | 0.4 m/s | 4.6 |
| 1995 | 32.2°C | 25.2°C | 18.3°C | 36.1°C | 13.5°C | 77 mm | 67% | 0.4 m/s | 4.9 |
| 1994 | 28.5°C | 22.8°C | 17.2°C | 32.2°C | 10.2°C | 86 mm | 80% | 0.4 m/s | 4.9 |
| 1993 | 31.6°C | 24.9°C | 18.2°C | 35.2°C | 7.7°C | 78 mm | 70% | 0.4 m/s | 5 |
| 1992 | 29.6°C | 24.3°C | 19.0°C | 32.9°C | 12.5°C | 68 mm | 78% | 0.4 m/s | 4.3 |
| 1991 | 31.4°C | 24.8°C | 18.3°C | 37.6°C | 8.4°C | 81 mm | 70% | 0.4 m/s | 5.2 |
| 1990 | 34.4°C | 26.7°C | 19.1°C | 39.2°C | 8.4°C | 25 mm | 55% | 0.4 m/s | 5.2 |
| 1989 | 28.7°C | 23.3°C | 17.8°C | 33.4°C | 11.8°C | 122 mm | 79% | 0.4 m/s | 4.1 |
| 1988 🌧️ | 28.7°C | 23.8°C | 18.9°C | 33.1°C | 12.6°C | 234 mm | 83% | 0.4 m/s | 3.8 |
| 1987 | 31.3°C | 24.7°C | 18.1°C | 34.9°C | 11.6°C | 65 mm | 68% | 0.4 m/s | 4.7 |
| 1986 | 31.4°C | 25.4°C | 19.5°C | 36.1°C | 15.3°C | 94 mm | 76% | 0.3 m/s | 4.7 |
| 1985 | 30.7°C | 24.0°C | 17.4°C | 35.0°C | 8.4°C | 91 mm | 67% | 0.4 m/s | 5 |
| 1984 | 31.0°C | 23.8°C | 16.6°C | 35.5°C | 11.2°C | 24 mm | 65% | 0.4 m/s | 5.2 |
| 1983 ❄️ | 27.3°C | 21.8°C | 16.3°C | 34.9°C | 6.2°C | 168 mm | 78% | 0.4 m/s | — |
| 1982 | 30.7°C | 23.9°C | 17.2°C | 35.7°C | 8.5°C | 55 mm | 66% | 0.4 m/s | — |
| 1981 | 31.4°C | 24.0°C | 16.5°C | 34.6°C | 7.9°C | 42 mm | 62% | 0.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31.1°C with lows near 18.4°C (mean 24.8°C), based on 45 years of NASA POWER data.
September averages 90 mm of rainfall in Auburn, one of the drier months. The wettest on record was 234 mm in 1988.
The hottest September reached 39.8°C in 2019. The coldest dipped to 6.2°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.7°C. Daytime highs moved from 30.2°C to 31.7°C and overnight lows from 16.8°C to 18.7°C over the same span.
September is one of the warmer months of the year in Auburn and one of the drier months, so plan for around 31.1°C daytime highs and 18.4°C at night.
Not quite — September is the 9th coolest month in Auburn, averaging 24.8°C.
For September in Auburn, pack light, breathable clothing and sun protection, with typical highs of 31.1°C and lows of 18.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 71% — moderately humid.
Average wind speed in September is 0.4 m/s. The windiest September on record averaged 0.6 m/s (2004).
The wettest September on record was 1988 with 234 mm. On average, September sees 90 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 Auburn 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.
