September is one of the warmer months of the year in Jackson, with average highs near 29.7°C and lows around 16.8°C (mean 23.3°C). It is one of the drier months, averaging 91 mm of rainfall and 66% relative humidity across the period.
September is one of the warmer months of the year in Jackson. Across 45 years of records, the warmest September in Jackson was 2019 — when the month averaged 27.6°C — while the coldest was 2003 at 21.3°C. Typical September days reach 29.7°C with nights near 16.8°C. The long-term trend is warming, about 0.2°C per decade.
September is one of the drier months in Jackson, averaging 91 mm of rainfall. The wettest September on record was 2002 with 264 mm, while the driest was 2019 at 16 mm.
Relative humidity in Jackson during September averages 66%. The most humid September was 2020 at 81%, and the least humid was 1999 at 37%.
September receives about 4.8 kWh/m²/day of solar energy in Jackson. The sunniest September was 2019 at 5.6 kWh/m²/day, and the cloudiest was 2009 at 4.
Average wind speed in Jackson during September is 1.4 m/s. The windiest Septembers were 2000 and 2008 at 1.7 m/s, while the calmest were 2021, 2023 and 2025, among others at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.0°C | 23.1°C | 23.0°C | 23.9°C | 23.1°C | +0.1°C |
| Avg High | 29.5°C | 29.9°C | 29.3°C | 30.2°C | 29.3°C | -0.2°C |
| Avg Low | 16.4°C | 16.3°C | 16.7°C | 17.5°C | 16.9°C | +0.5°C |
| Avg Rain | 90 mm | 81 mm | 107 mm | 86 mm | 93 mm | +4 mm |
September temperatures in Jackson have risen by about 0.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 4.8°C (1983) to a record high of 41°C (1990).
Rainfall in September is one of the drier months, averaging 91 mm, with a wettest year of 264 mm.
One of the best times to visit Jackson
September is one of the best times to visit Jackson. Expect days averaging 29.7°C and nights around 16.8°C (mean 23.3°C) — warmer than Jackson's yearly average — with higher rainfall (91 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 | 32.3°C | 25.1°C | 17.9°C | 37.2°C | 11.3°C | 93 mm | 58% | 1.2 m/s | 5 |
| 2024 | 28.8°C | 23.3°C | 17.7°C | 35.2°C | 10.3°C | 210 mm | 71% | 1.4 m/s | 4.2 |
| 2023 | 30.3°C | 23.7°C | 17.0°C | 33.6°C | 11.9°C | 27 mm | 66% | 1.2 m/s | 5.3 |
| 2022 | 29.7°C | 22.9°C | 16.1°C | 37.6°C | 7.9°C | 49 mm | 66% | 1.3 m/s | 5.2 |
| 2021 | 28.0°C | 22.2°C | 16.4°C | 32.3°C | 8.8°C | 86 mm | 77% | 1.2 m/s | 4.9 |
| 2020 | 26.6°C | 21.4°C | 16.3°C | 31.3°C | 9.2°C | 96 mm | 81% | 1.3 m/s | 4.3 |
| 2019 🔥 | 34.6°C | 27.6°C | 20.6°C | 37.5°C | 16.6°C | 16 mm | 61% | 1.2 m/s | 5.6 |
| 2018 | 30.7°C | 25.4°C | 20.1°C | 37.2°C | 14.5°C | 215 mm | 74% | 1.3 m/s | 4.4 |
| 2017 | 27.2°C | 21.6°C | 16.1°C | 31.5°C | 10.0°C | 57 mm | 76% | 1.2 m/s | 5.1 |
| 2016 | 31.7°C | 25.1°C | 18.5°C | 35.5°C | 10.3°C | 37 mm | 68% | 1.3 m/s | 5.4 |
| 2015 | 30.9°C | 24.1°C | 17.2°C | 36.3°C | 9.5°C | 53 mm | 65% | 1.2 m/s | 5 |
| 2014 | 28.7°C | 22.7°C | 16.7°C | 33.6°C | 8.7°C | 62 mm | 72% | 1.2 m/s | 4.8 |
| 2013 | 29.7°C | 23.5°C | 17.3°C | 34.6°C | 10.1°C | 128 mm | 71% | 1.2 m/s | 4.9 |
| 2012 | 28.5°C | 22.4°C | 16.2°C | 35.9°C | 6.8°C | 125 mm | 70% | 1.4 m/s | 4.8 |
| 2011 | 28.2°C | 21.9°C | 15.6°C | 40.0°C | 11.1°C | 131 mm | 64% | 1.6 m/s | 4.6 |
| 2010 | 31.9°C | 24.5°C | 17.0°C | 37.4°C | 9.8°C | 32 mm | 58% | 1.4 m/s | 5.2 |
| 2009 | 27.7°C | 22.8°C | 17.9°C | 33.0°C | 8.9°C | 202 mm | 80% | 1.2 m/s | 4 |
| 2008 | 30.7°C | 24.1°C | 17.5°C | 35.2°C | 12.6°C | 35 mm | 64% | 1.7 m/s | 4.6 |
| 2007 | 30.6°C | 24.4°C | 18.3°C | 35.6°C | 11.5°C | 110 mm | 67% | 1.3 m/s | 4.7 |
| 2006 | 28.2°C | 21.6°C | 15.0°C | 33.3°C | 7.6°C | 82 mm | 68% | 1.6 m/s | 4.8 |
| 2005 | 30.2°C | 23.9°C | 17.6°C | 35.0°C | 6.5°C | 91 mm | 70% | 1.3 m/s | 5.4 |
| 2004 | 28.9°C | 22.4°C | 15.9°C | 32.2°C | 9.4°C | 27 mm | 68% | 1.5 m/s | 5.2 |
| 2003 ❄️ | 27.4°C | 21.3°C | 15.2°C | 33.2°C | 5.7°C | 114 mm | 72% | 1.4 m/s | 5.2 |
| 2002 🌧️ | 30.8°C | 24.4°C | 18.0°C | 36.8°C | 9.0°C | 264 mm | 68% | 1.4 m/s | 4.6 |
| 2001 | 28.4°C | 21.9°C | 15.4°C | 33.4°C | 6.3°C | 70 mm | 67% | 1.4 m/s | 5 |
| 2000 | 30.2°C | 23.4°C | 16.6°C | 38.9°C | 5.9°C | 74 mm | 59% | 1.7 m/s | 4.6 |
| 1999 | 32.0°C | 24.2°C | 16.5°C | 39.2°C | 7.7°C | 18 mm | 37% | 1.5 m/s | 5.3 |
| 1998 | 33.8°C | 26.4°C | 19.1°C | 38.3°C | 11.3°C | 20 mm | 56% | 1.3 m/s | 5.4 |
| 1997 | 29.0°C | 22.3°C | 15.5°C | 35.0°C | 8.9°C | 100 mm | 69% | 1.3 m/s | 5 |
| 1996 | 27.7°C | 21.4°C | 15.2°C | 33.4°C | 7.6°C | 196 mm | 72% | 1.4 m/s | 4.8 |
| 1995 | 29.8°C | 22.5°C | 15.2°C | 34.5°C | 5.4°C | 44 mm | 61% | 1.4 m/s | 4.8 |
| 1994 | 29.3°C | 21.8°C | 14.3°C | 33.8°C | 8.0°C | 56 mm | 64% | 1.3 m/s | 5.1 |
| 1993 | 28.9°C | 22.1°C | 15.3°C | 33.9°C | 6.7°C | 125 mm | 68% | 1.5 m/s | 4.6 |
| 1992 | 27.6°C | 21.6°C | 15.6°C | 33.3°C | 5.2°C | 127 mm | 75% | 1.4 m/s | 4.4 |
| 1991 | 28.7°C | 22.9°C | 17.1°C | 34.8°C | 4.9°C | 69 mm | 68% | 1.3 m/s | 4.9 |
| 1990 | 32.6°C | 25.8°C | 19.1°C | 41.0°C | 6.9°C | 56 mm | 57% | 1.2 m/s | 4.7 |
| 1989 | 27.8°C | 21.9°C | 16.0°C | 34.3°C | 4.9°C | 167 mm | 75% | 1.4 m/s | 4.1 |
| 1988 | 29.4°C | 23.4°C | 17.4°C | 35.3°C | 8.2°C | 170 mm | 73% | 1.5 m/s | 4.4 |
| 1987 | 30.7°C | 23.8°C | 16.9°C | 35.6°C | 11.8°C | 74 mm | 58% | 1.3 m/s | 4.8 |
| 1986 | 31.3°C | 25.3°C | 19.2°C | 34.9°C | 13.0°C | 68 mm | 67% | 1.5 m/s | 4.7 |
| 1985 | 28.6°C | 21.9°C | 15.3°C | 32.9°C | 6.3°C | 113 mm | 66% | 1.5 m/s | 5 |
| 1984 | 29.2°C | 22.1°C | 14.9°C | 37.1°C | 6.6°C | 56 mm | 60% | 1.6 m/s | 4.5 |
| 1983 | 31.2°C | 24.4°C | 17.7°C | 37.7°C | 4.8°C | 33 mm | 53% | 1.4 m/s | — |
| 1982 | 28.8°C | 22.3°C | 15.8°C | 34.4°C | 6.5°C | 81 mm | 67% | 1.4 m/s | — |
| 1981 | 28.6°C | 21.6°C | 14.6°C | 32.9°C | 6.9°C | 45 mm | 63% | 1.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.7°C with lows near 16.8°C (mean 23.3°C), based on 45 years of NASA POWER data.
September averages 91 mm of rainfall in Jackson, one of the drier months. The wettest on record was 264 mm in 2002.
The hottest September reached 41°C in 1990. The coldest dipped to 4.8°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.9°C. Daytime highs moved from 29.3°C to 29.8°C and overnight lows from 15.7°C to 17°C over the same span.
September is one of the warmer months of the year in Jackson and one of the drier months, so plan for around 29.7°C daytime highs and 16.8°C at night.
Not quite — September is the 9th coolest month in Jackson, averaging 23.3°C.
For September in Jackson, pack light layers you can adjust through the day, with typical highs of 29.7°C and lows of 16.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 66% — moderately humid.
Average wind speed in September is 1.4 m/s. The windiest September on record averaged 1.7 m/s (2000).
The wettest September on record was 2002 with 264 mm. On average, September sees 91 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 Jackson 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.
