September is one of the warmer months of the year in Memphis, with average highs near 30.7°C and lows around 18°C (mean 24.4°C). It is one of the drier months, averaging 79 mm of rainfall and 63% relative humidity across the period.
September is one of the warmer months of the year in Memphis. Across 45 years of records, the warmest September in Memphis was 2019 — when the month averaged 29°C — while the coldest was 1989 at 22.5°C. Typical September days reach 30.7°C with nights near 18°C. The long-term trend is warming, about 0.3°C per decade.
September is one of the drier months in Memphis, averaging 79 mm of rainfall. The wettest September on record was 2024 with 224 mm, while the driest was 2004 at 11 mm.
Relative humidity in Memphis during September averages 63%. The most humid September was 2009 at 80%, and the least humid was 1999 at 40%.
September receives about 4.9 kWh/m²/day of solar energy in Memphis. The sunniest Septembers were 1999, 2004 and 2019 at 5.4 kWh/m²/day, and the cloudiest was 2009 at 4.
Average wind speed in Memphis during September is 2.1 m/s. The windiest September was 2000 at 2.7 m/s, while the calmest was 2025 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.0°C | 24.1°C | 24.0°C | 25.1°C | 24.4°C | +0.4°C |
| Avg High | 30.4°C | 30.7°C | 30.2°C | 31.4°C | 30.6°C | +0.2°C |
| Avg Low | 17.6°C | 17.4°C | 17.8°C | 18.8°C | 18.3°C | +0.7°C |
| Avg Rain | 73 mm | 75 mm | 93 mm | 67 mm | 90 mm | +17 mm |
September temperatures in Memphis have risen by about 1.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 5.3°C (1989) to a record high of 41.1°C (1990).
Rainfall in September is one of the drier months, averaging 79 mm, with a wettest year of 224 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
One of the best times to visit Memphis
September is one of the best times to visit Memphis. Expect days averaging 30.7°C and nights around 18°C (mean 24.4°C) — warmer than Memphis's yearly average — with moderate rainfall (79 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 | 33.1°C | 26.4°C | 19.6°C | 37.6°C | 12.2°C | 88 mm | 57% | 1.6 m/s | 5.1 |
| 2024 🌧️ | 28.5°C | 23.4°C | 18.3°C | 34.2°C | 11.2°C | 224 mm | 72% | 2.1 m/s | 4.1 |
| 2023 | 32.4°C | 25.5°C | 18.6°C | 35.4°C | 14.0°C | 37 mm | 58% | 1.9 m/s | 5.2 |
| 2022 | 31.2°C | 24.3°C | 17.5°C | 38.4°C | 9.4°C | 33 mm | 60% | 1.9 m/s | 5.3 |
| 2021 | 30.3°C | 24.1°C | 17.9°C | 32.7°C | 11.6°C | 82 mm | 70% | 1.9 m/s | 4.9 |
| 2020 | 28.2°C | 22.9°C | 17.6°C | 32.9°C | 9.5°C | 78 mm | 77% | 2.2 m/s | 4.4 |
| 2019 🔥 | 35.8°C | 29.0°C | 22.2°C | 38.8°C | 19.7°C | 15 mm | 55% | 1.8 m/s | 5.4 |
| 2018 | 30.3°C | 25.4°C | 20.4°C | 36.3°C | 14.8°C | 145 mm | 75% | 1.9 m/s | 4.5 |
| 2017 | 28.8°C | 23.1°C | 17.4°C | 33.4°C | 10.7°C | 40 mm | 71% | 1.8 m/s | 5.2 |
| 2016 | 33.0°C | 26.5°C | 20.1°C | 37.1°C | 11.9°C | 23 mm | 63% | 1.9 m/s | 5.3 |
| 2015 | 31.9°C | 25.1°C | 18.4°C | 36.9°C | 10.4°C | 32 mm | 61% | 1.8 m/s | 5.1 |
| 2014 | 29.9°C | 23.9°C | 17.9°C | 35.7°C | 10.2°C | 76 mm | 69% | 2 m/s | 4.8 |
| 2013 | 32.2°C | 25.7°C | 19.1°C | 37.9°C | 11.0°C | 90 mm | 60% | 2 m/s | 5 |
| 2012 | 29.5°C | 23.5°C | 17.5°C | 38.2°C | 9.0°C | 130 mm | 67% | 2.2 m/s | 4.8 |
| 2011 | 29.7°C | 23.0°C | 16.4°C | 38.7°C | 11.2°C | 91 mm | 58% | 2.4 m/s | 4.9 |
| 2010 | 33.2°C | 26.1°C | 19.0°C | 38.5°C | 11.2°C | 24 mm | 51% | 2.2 m/s | 5.2 |
| 2009 | 27.9°C | 23.3°C | 18.6°C | 32.7°C | 9.1°C | 170 mm | 80% | 1.8 m/s | 4 |
| 2008 | 29.7°C | 23.8°C | 17.9°C | 34.3°C | 12.4°C | 75 mm | 68% | 2.6 m/s | 4.6 |
| 2007 | 31.5°C | 25.5°C | 19.5°C | 36.2°C | 12.1°C | 82 mm | 63% | 2 m/s | 4.7 |
| 2006 | 29.1°C | 22.6°C | 16.1°C | 34.2°C | 9.9°C | 101 mm | 65% | 2.4 m/s | 4.9 |
| 2005 | 32.4°C | 25.8°C | 19.2°C | 37.7°C | 7.8°C | 81 mm | 63% | 2.1 m/s | 5.3 |
| 2004 | 31.0°C | 24.2°C | 17.4°C | 34.5°C | 10.2°C | 11 mm | 58% | 2.4 m/s | 5.4 |
| 2003 | 28.8°C | 22.6°C | 16.3°C | 33.4°C | 6.7°C | 91 mm | 66% | 2.1 m/s | 5.1 |
| 2002 | 30.7°C | 24.7°C | 18.6°C | 36.7°C | 9.8°C | 210 mm | 67% | 2.1 m/s | 4.8 |
| 2001 | 29.5°C | 23.1°C | 16.6°C | 35.0°C | 7.3°C | 64 mm | 63% | 2.1 m/s | 5.1 |
| 2000 | 31.6°C | 24.8°C | 18.0°C | 40.7°C | 7.2°C | 45 mm | 53% | 2.7 m/s | 4.8 |
| 1999 | 32.1°C | 24.8°C | 17.6°C | 38.6°C | 8.7°C | 39 mm | 40% | 2.1 m/s | 5.4 |
| 1998 | 34.6°C | 27.6°C | 20.6°C | 38.8°C | 14.3°C | 23 mm | 52% | 2.1 m/s | 5.3 |
| 1997 | 30.4°C | 23.7°C | 17.0°C | 36.3°C | 10.2°C | 116 mm | 64% | 2 m/s | 5 |
| 1996 | 28.9°C | 22.7°C | 16.5°C | 34.4°C | 8.9°C | 161 mm | 67% | 2.1 m/s | 4.9 |
| 1995 | 30.9°C | 23.7°C | 16.4°C | 36.1°C | 6.7°C | 25 mm | 54% | 2.2 m/s | 4.8 |
| 1994 | 30.3°C | 22.8°C | 15.4°C | 34.7°C | 7.6°C | 43 mm | 60% | 2 m/s | 5.1 |
| 1993 | 29.6°C | 22.9°C | 16.1°C | 35.1°C | 8.6°C | 119 mm | 66% | 2.3 m/s | 4.5 |
| 1992 | 28.8°C | 22.6°C | 16.4°C | 34.4°C | 6.4°C | 91 mm | 70% | 2.4 m/s | 4.3 |
| 1991 | 29.0°C | 23.4°C | 17.8°C | 34.4°C | 6.0°C | 59 mm | 67% | 1.8 m/s | 4.9 |
| 1990 | 32.8°C | 26.6°C | 20.3°C | 41.1°C | 8.3°C | 71 mm | 57% | 1.7 m/s | 4.7 |
| 1989 ❄️ | 28.3°C | 22.5°C | 16.8°C | 35.3°C | 5.3°C | 145 mm | 73% | 2.2 m/s | 4.2 |
| 1988 | 30.8°C | 24.8°C | 18.8°C | 36.3°C | 9.6°C | 135 mm | 68% | 2.3 m/s | 4.5 |
| 1987 | 31.7°C | 24.8°C | 18.0°C | 36.0°C | 12.6°C | 58 mm | 55% | 1.9 m/s | 4.9 |
| 1986 | 32.7°C | 26.7°C | 20.6°C | 35.6°C | 14.4°C | 38 mm | 61% | 2.4 m/s | 4.7 |
| 1985 | 29.8°C | 23.4°C | 16.9°C | 34.6°C | 7.1°C | 80 mm | 62% | 2.5 m/s | 4.9 |
| 1984 | 29.2°C | 22.6°C | 16.1°C | 36.6°C | 7.3°C | 66 mm | 61% | 2.4 m/s | 4.7 |
| 1983 | 31.4°C | 24.8°C | 18.1°C | 37.4°C | 6.3°C | 53 mm | 53% | 2.2 m/s | — |
| 1982 | 29.7°C | 23.3°C | 16.9°C | 35.1°C | 7.3°C | 58 mm | 64% | 2.1 m/s | — |
| 1981 | 30.0°C | 23.0°C | 15.9°C | 34.4°C | 8.0°C | 23 mm | 58% | 2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 30.7°C with lows near 18°C (mean 24.4°C), based on 45 years of NASA POWER data.
September averages 79 mm of rainfall in Memphis, one of the drier months. The wettest on record was 224 mm in 2024.
The hottest September reached 41.1°C in 1990. The coldest dipped to 5.3°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.3°C. Daytime highs moved from 30°C to 31.1°C and overnight lows from 16.8°C to 18.4°C over the same span.
September is one of the warmer months of the year in Memphis and one of the drier months, so plan for around 30.7°C daytime highs and 18°C at night.
Not quite — September is the 9th coolest month in Memphis, averaging 24.4°C.
For September in Memphis, pack light, breathable clothing and sun protection, with typical highs of 30.7°C and lows of 18°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 63% — moderately humid.
Average wind speed in September is 2.1 m/s. The windiest September on record averaged 2.7 m/s (2000).
The wettest September on record was 2024 with 224 mm. On average, September sees 79 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 Memphis 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.
