September is one of the warmer months of the year in Savannah, with average highs near 29.6°C and lows around 21.5°C (mean 25.6°C). It is a relatively wet time of year, averaging 122 mm of rainfall and 78% relative humidity across the period.
September is one of the warmer months of the year in Savannah. Across 45 years of records, the warmest Septembers in Savannah were 2018 and 2019 — when the month averaged 28.1°C — while the coldest were 1984 and 2001 at 24.1°C. Typical September days reach 29.6°C with nights near 21.5°C. The long-term trend is warming, about 0.3°C per decade.
September is a relatively wet time of year in Savannah, averaging 122 mm of rainfall. The wettest September on record was 1989 with 322 mm, while the driest was 2025 at 27 mm.
Relative humidity in Savannah during September averages 78%. The most humid September was 1995 at 86%, and the least humid was 1990 at 67%.
September receives about 4.8 kWh/m²/day of solar energy in Savannah. The sunniest September was 2019 at 5.5 kWh/m²/day, and the cloudiest was 1988 at 3.8.
Average wind speed in Savannah during September is 1.2 m/s. The windiest September was 2004 at 1.7 m/s, while the calmest were 1987, 2014 and 2021, among others at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.8°C | 25.5°C | 25.5°C | 26.4°C | 25.6°C | +0.8°C |
| Avg High | 28.7°C | 29.6°C | 29.3°C | 30.6°C | 29.6°C | +0.9°C |
| Avg Low | 20.9°C | 21.3°C | 21.6°C | 22.2°C | 21.6°C | +0.7°C |
| Avg Rain | 153 mm | 129 mm | 114 mm | 91 mm | 128 mm | -25 mm |
September temperatures in Savannah have risen by about 1.2°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 11.5°C (1983) to a record high of 38.1°C (2020).
Rainfall in September is a relatively wet time of year, averaging 122 mm, with a wettest year of 322 mm.
One of the best times to visit Savannah
September is one of the best times to visit Savannah. Expect days averaging 29.6°C and nights around 21.5°C (mean 25.6°C) — warmer than Savannah's yearly average — with higher rainfall (122 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 | 30.4°C | 25.8°C | 21.2°C | 34.8°C | 17.7°C | 27 mm | 76% | 1.1 m/s | 5.4 |
| 2024 | 29.0°C | 25.8°C | 22.5°C | 33.5°C | 18.0°C | 156 mm | 85% | 1.3 m/s | 4.4 |
| 2023 | 30.2°C | 25.8°C | 21.5°C | 34.6°C | 17.0°C | 145 mm | 76% | 1.1 m/s | 5.2 |
| 2022 | 28.8°C | 25.1°C | 21.5°C | 32.8°C | 15.1°C | 131 mm | 79% | 1.2 m/s | 4.9 |
| 2021 | 29.5°C | 25.3°C | 21.1°C | 33.5°C | 14.4°C | 141 mm | 78% | 1 m/s | 5.1 |
| 2020 | 29.4°C | 25.5°C | 21.7°C | 38.1°C | 13.1°C | 169 mm | 80% | 1.2 m/s | 4.5 |
| 2019 | 32.9°C | 28.1°C | 23.2°C | 37.3°C | 19.3°C | 46 mm | 72% | 1.3 m/s | 5.5 |
| 2018 🔥 | 31.9°C | 28.1°C | 24.3°C | 35.1°C | 21.7°C | 65 mm | 77% | 1.1 m/s | 4.8 |
| 2017 | 29.6°C | 25.6°C | 21.5°C | 34.2°C | 18.9°C | 121 mm | 80% | 1.2 m/s | 5.1 |
| 2016 | 30.8°C | 26.5°C | 22.1°C | 34.7°C | 17.7°C | 123 mm | 78% | 1.1 m/s | 5 |
| 2015 | 28.7°C | 25.2°C | 21.7°C | 33.7°C | 15.2°C | 103 mm | 84% | 1.1 m/s | 4.2 |
| 2014 | 29.5°C | 25.9°C | 22.2°C | 33.4°C | 14.7°C | 148 mm | 82% | 1 m/s | 4 |
| 2013 | 29.3°C | 25.4°C | 21.6°C | 33.9°C | 15.3°C | 59 mm | 78% | 1.1 m/s | 5.1 |
| 2012 | 30.3°C | 25.8°C | 21.3°C | 34.2°C | 14.2°C | 51 mm | 75% | 1.1 m/s | 5.1 |
| 2011 | 30.8°C | 26.1°C | 21.5°C | 35.6°C | 16.6°C | 99 mm | 74% | 1.1 m/s | 4.8 |
| 2010 | 31.8°C | 27.0°C | 22.1°C | 35.8°C | 17.6°C | 98 mm | 70% | 1.1 m/s | 5.3 |
| 2009 | 29.1°C | 25.3°C | 21.5°C | 32.7°C | 12.8°C | 62 mm | 79% | 1.2 m/s | 4.9 |
| 2008 | 29.3°C | 25.3°C | 21.2°C | 33.9°C | 14.5°C | 62 mm | 78% | 1.3 m/s | 4.9 |
| 2007 | 29.1°C | 25.6°C | 22.1°C | 32.2°C | 18.5°C | 170 mm | 81% | 1.3 m/s | 5.1 |
| 2006 | 29.9°C | 25.8°C | 21.6°C | 33.0°C | 16.4°C | 109 mm | 74% | 1.1 m/s | 5.1 |
| 2005 | 32.2°C | 27.4°C | 22.7°C | 36.9°C | 18.2°C | 35 mm | 71% | 1.3 m/s | 5.2 |
| 2004 | 28.4°C | 25.2°C | 22.1°C | 32.3°C | 15.3°C | 173 mm | 83% | 1.7 m/s | 4.2 |
| 2003 | 28.8°C | 24.7°C | 20.6°C | 31.2°C | 13.7°C | 67 mm | 79% | 1.2 m/s | 5 |
| 2002 | 30.0°C | 26.6°C | 23.2°C | 35.2°C | 19.5°C | 155 mm | 82% | 1.3 m/s | 4.4 |
| 2001 | 27.9°C | 24.1°C | 20.4°C | 32.0°C | 12.6°C | 140 mm | 78% | 1.2 m/s | 4.7 |
| 2000 | 28.5°C | 24.7°C | 20.9°C | 34.1°C | 13.9°C | 170 mm | 81% | 1.3 m/s | 4.2 |
| 1999 | 29.3°C | 24.8°C | 20.3°C | 36.4°C | 12.8°C | 168 mm | 73% | 1.3 m/s | 4.9 |
| 1998 | 30.0°C | 26.2°C | 22.3°C | 33.7°C | 16.5°C | 152 mm | 77% | 1.2 m/s | 4.7 |
| 1997 | 31.0°C | 26.3°C | 21.6°C | 36.0°C | 16.0°C | 133 mm | 74% | 1.1 m/s | 4.8 |
| 1996 | 29.5°C | 25.2°C | 21.0°C | 32.9°C | 14.6°C | 178 mm | 77% | 1.2 m/s | 4.8 |
| 1995 | 27.9°C | 24.4°C | 21.0°C | 31.3°C | 16.3°C | 140 mm | 86% | 1.2 m/s | 4.3 |
| 1994 | 28.7°C | 24.5°C | 20.4°C | 34.1°C | 14.9°C | 151 mm | 78% | 1.2 m/s | 4.9 |
| 1993 | 30.5°C | 26.3°C | 22.0°C | 34.5°C | 12.5°C | 148 mm | 75% | 1.1 m/s | 4.8 |
| 1992 | 28.5°C | 25.1°C | 21.6°C | 31.6°C | 15.2°C | 142 mm | 83% | 1.2 m/s | 4.4 |
| 1991 | 28.8°C | 24.9°C | 21.0°C | 33.4°C | 13.1°C | 47 mm | 80% | 1.2 m/s | 5.1 |
| 1990 | 31.9°C | 26.9°C | 21.8°C | 36.8°C | 14.5°C | 31 mm | 67% | 1.1 m/s | 5.3 |
| 1989 🌧️ | 28.4°C | 24.9°C | 21.5°C | 33.6°C | 14.7°C | 322 mm | 84% | 1.3 m/s | 4.1 |
| 1988 | 28.3°C | 25.0°C | 21.7°C | 32.1°C | 16.8°C | 257 mm | 86% | 1.2 m/s | 3.8 |
| 1987 | 28.6°C | 25.2°C | 21.7°C | 31.8°C | 15.3°C | 276 mm | 82% | 1 m/s | 4.3 |
| 1986 | 30.0°C | 26.1°C | 22.1°C | 33.6°C | 20.2°C | 62 mm | 79% | 1 m/s | 4.8 |
| 1985 | 28.4°C | 24.4°C | 20.3°C | 33.3°C | 13.3°C | 33 mm | 77% | 1.3 m/s | 5.3 |
| 1984 ❄️ | 28.4°C | 24.1°C | 19.7°C | 35.3°C | 13.1°C | 157 mm | 76% | 1.4 m/s | 4.7 |
| 1983 | 28.6°C | 24.4°C | 20.3°C | 33.9°C | 11.5°C | 92 mm | 76% | 1.2 m/s | — |
| 1982 | 28.1°C | 24.3°C | 20.4°C | 33.3°C | 12.7°C | 131 mm | 79% | 1.1 m/s | — |
| 1981 | 29.5°C | 24.8°C | 20.0°C | 32.6°C | 11.6°C | 48 mm | 72% | 1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 29.6°C with lows near 21.5°C (mean 25.6°C), based on 45 years of NASA POWER data.
September averages 122 mm of rainfall in Savannah, a relatively wet time of year. The wettest on record was 322 mm in 1989.
The hottest September reached 38.1°C in 2020. The coldest dipped to 11.5°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.2°C. Daytime highs moved from 28.6°C to 29.6°C and overnight lows from 20.1°C to 21.6°C over the same span.
September is one of the warmer months of the year in Savannah and a relatively wet time of year, so plan for around 29.6°C daytime highs and 21.5°C at night.
Not quite — September is the 9th coolest month in Savannah, averaging 25.6°C.
For September in Savannah, pack light layers you can adjust through the day, with typical highs of 29.6°C and lows of 21.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 78% — quite humid.
Average wind speed in September is 1.2 m/s. The windiest September on record averaged 1.7 m/s (2004).
The wettest September on record was 1989 with 322 mm. On average, September sees 122 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 Savannah 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.
