September is one of the warmer months of the year in Tallahassee, with average highs near 31.1°C and lows around 20.2°C (mean 25.7°C). It is about average for rainfall, averaging 118 mm of rainfall and 78% relative humidity across the period.
September is one of the warmer months of the year in Tallahassee. Across 45 years of records, the warmest September in Tallahassee was 2019 — when the month averaged 28.5°C — while the coldest was 1983 at 23.5°C. Typical September days reach 31.1°C with nights near 20.2°C. The long-term trend is warming, about 0.4°C per decade.
September is about average for rainfall in Tallahassee, averaging 118 mm of rainfall. The wettest September on record was 1998 with 393 mm, while the driest was 2019 at 3 mm.
Relative humidity in Tallahassee during September averages 78%. The most humid September was 1998 at 87%, and the least humid was 1999 at 66%.
September receives about 4.9 kWh/m²/day of solar energy in Tallahassee. The sunniest September was 2019 at 5.9 kWh/m²/day, and the cloudiest was 1988 at 3.9.
Average wind speed in Tallahassee during September is 0.2 m/s. The windiest Septembers were 2004, 2017 and 2024, among others at 0.3 m/s, while the calmest were 2022, 2023 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.8°C | 25.7°C | 25.2°C | 26.5°C | 26.0°C | +1.2°C |
| Avg High | 30.2°C | 31.3°C | 30.4°C | 32.2°C | 31.3°C | +1.1°C |
| Avg Low | 19.4°C | 20.1°C | 20.1°C | 20.7°C | 20.6°C | +1.2°C |
| Avg Rain | 98 mm | 127 mm | 117 mm | 95 mm | 168 mm | +70 mm |
September temperatures in Tallahassee have risen by about 1.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 8.4°C (1983) to a record high of 40°C (2019).
Rainfall in September is about average for rainfall, averaging 118 mm, with a wettest year of 393 mm.
One of the best times to visit Tallahassee
September is one of the best times to visit Tallahassee. Expect days averaging 31.1°C and nights around 20.2°C (mean 25.7°C) — warmer than Tallahassee's yearly average — with higher rainfall (118 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 | 33.8°C | 26.8°C | 19.7°C | 36.9°C | 15.6°C | 27 mm | 67% | 0.2 m/s | 5.6 |
| 2024 | 31.1°C | 26.4°C | 21.7°C | 39.1°C | 18.9°C | 362 mm | 83% | 0.3 m/s | 4.1 |
| 2023 | 32.4°C | 26.6°C | 20.9°C | 37.4°C | 16.3°C | 119 mm | 76% | 0.2 m/s | 5.1 |
| 2022 | 30.5°C | 25.4°C | 20.2°C | 36.1°C | 12.5°C | 84 mm | 77% | 0.2 m/s | 5.2 |
| 2021 | 30.3°C | 25.3°C | 20.2°C | 33.4°C | 11.8°C | 142 mm | 84% | 0.2 m/s | 4.9 |
| 2020 | 29.8°C | 25.2°C | 20.6°C | 37.5°C | 10.2°C | 274 mm | 84% | 0.2 m/s | 4.2 |
| 2019 🔥 | 35.5°C | 28.5°C | 21.6°C | 40.0°C | 18.3°C | 3 mm | 66% | 0.2 m/s | 5.9 |
| 2018 | 33.5°C | 28.1°C | 22.7°C | 37.1°C | 21.6°C | 81 mm | 78% | 0.2 m/s | 5.4 |
| 2017 | 31.4°C | 25.8°C | 20.2°C | 39.5°C | 14.6°C | 87 mm | 76% | 0.3 m/s | 5 |
| 2016 | 31.2°C | 26.1°C | 21.0°C | 34.6°C | 13.6°C | 161 mm | 81% | 0.2 m/s | 5.2 |
| 2015 | 30.9°C | 25.6°C | 20.3°C | 36.5°C | 12.4°C | 109 mm | 78% | 0.2 m/s | 4.3 |
| 2014 | 32.0°C | 26.6°C | 21.1°C | 38.3°C | 14.9°C | 143 mm | 79% | 0.2 m/s | 4.6 |
| 2013 | 30.7°C | 25.7°C | 20.6°C | 34.4°C | 15.0°C | 78 mm | 83% | 0.2 m/s | 5.1 |
| 2012 | 30.1°C | 24.9°C | 19.7°C | 34.2°C | 12.9°C | 120 mm | 82% | 0.2 m/s | 5 |
| 2011 | 32.6°C | 26.1°C | 19.6°C | 35.9°C | 13.4°C | 88 mm | 70% | 0.2 m/s | 5 |
| 2010 | 33.8°C | 27.1°C | 20.5°C | 38.5°C | 13.6°C | 76 mm | 70% | 0.2 m/s | 5.7 |
| 2009 | 30.0°C | 25.3°C | 20.7°C | 33.9°C | 12.0°C | 132 mm | 83% | 0.2 m/s | 4.8 |
| 2008 | 30.0°C | 24.7°C | 19.4°C | 34.6°C | 10.1°C | 31 mm | 82% | 0.2 m/s | 5.4 |
| 2007 | 32.1°C | 26.5°C | 20.9°C | 35.1°C | 15.2°C | 90 mm | 75% | 0.2 m/s | 5.2 |
| 2006 | 31.2°C | 25.3°C | 19.5°C | 35.8°C | 11.0°C | 95 mm | 75% | 0.2 m/s | 4.8 |
| 2005 | 31.9°C | 26.2°C | 20.5°C | 36.0°C | 15.8°C | 41 mm | 77% | 0.2 m/s | 5.5 |
| 2004 | 29.3°C | 25.1°C | 20.8°C | 33.9°C | 14.9°C | 218 mm | 84% | 0.3 m/s | 4.5 |
| 2003 | 29.0°C | 23.8°C | 18.7°C | 32.7°C | 9.9°C | 65 mm | 83% | 0.2 m/s | 5 |
| 2002 | 31.6°C | 26.9°C | 22.2°C | 37.0°C | 19.8°C | 180 mm | 81% | 0.3 m/s | 4.5 |
| 2001 | 29.8°C | 24.1°C | 18.3°C | 34.5°C | 9.2°C | 106 mm | 76% | 0.2 m/s | 5 |
| 2000 | 29.2°C | 24.5°C | 19.8°C | 33.9°C | 11.3°C | 216 mm | 83% | 0.3 m/s | 4.6 |
| 1999 | 32.7°C | 26.0°C | 19.3°C | 38.1°C | 11.8°C | 91 mm | 66% | 0.3 m/s | 5.2 |
| 1998 🌧️ | 29.1°C | 25.2°C | 21.2°C | 34.4°C | 15.9°C | 393 mm | 87% | 0.2 m/s | 4 |
| 1997 | 33.5°C | 27.1°C | 20.7°C | 37.3°C | 15.3°C | 91 mm | 72% | 0.2 m/s | 5.3 |
| 1996 | 29.9°C | 24.6°C | 19.3°C | 33.6°C | 12.5°C | 158 mm | 83% | 0.2 m/s | 4.8 |
| 1995 | 33.0°C | 26.8°C | 20.5°C | 36.9°C | 15.1°C | 70 mm | 72% | 0.2 m/s | 5 |
| 1994 | 29.0°C | 24.1°C | 19.2°C | 32.9°C | 13.6°C | 191 mm | 85% | 0.2 m/s | 4.7 |
| 1993 | 32.1°C | 26.4°C | 20.8°C | 36.4°C | 11.5°C | 98 mm | 75% | 0.2 m/s | 4.8 |
| 1992 | 30.0°C | 25.2°C | 20.3°C | 34.6°C | 13.4°C | 82 mm | 83% | 0.2 m/s | 4.6 |
| 1991 | 30.5°C | 25.1°C | 19.8°C | 35.6°C | 12.0°C | 31 mm | 80% | 0.2 m/s | 5.5 |
| 1990 | 33.6°C | 26.9°C | 20.2°C | 38.7°C | 10.9°C | 68 mm | 68% | 0.2 m/s | 5.3 |
| 1989 | 30.3°C | 25.1°C | 19.9°C | 33.1°C | 13.7°C | 117 mm | 82% | 0.2 m/s | 4.7 |
| 1988 | 29.8°C | 25.4°C | 21.0°C | 33.9°C | 16.4°C | 189 mm | 86% | 0.2 m/s | 3.9 |
| 1987 | 30.3°C | 25.0°C | 19.6°C | 33.4°C | 12.2°C | 82 mm | 79% | 0.2 m/s | 4.6 |
| 1986 | 31.3°C | 26.2°C | 21.1°C | 34.9°C | 19.0°C | 73 mm | 82% | 0.2 m/s | 5 |
| 1985 | 29.6°C | 24.3°C | 19.0°C | 33.5°C | 10.5°C | 54 mm | 81% | 0.3 m/s | 5.2 |
| 1984 | 31.4°C | 25.0°C | 18.5°C | 35.3°C | 14.8°C | 39 mm | 74% | 0.2 m/s | 5.2 |
| 1983 ❄️ | 28.7°C | 23.5°C | 18.3°C | 34.4°C | 8.4°C | 117 mm | 81% | 0.2 m/s | — |
| 1982 | 29.3°C | 24.1°C | 18.9°C | 33.5°C | 8.9°C | 142 mm | 81% | 0.2 m/s | — |
| 1981 | 31.4°C | 24.9°C | 18.5°C | 34.6°C | 9.0°C | 74 mm | 70% | 0.3 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 20.2°C (mean 25.7°C), based on 45 years of NASA POWER data.
September averages 118 mm of rainfall in Tallahassee, about average for rainfall. The wettest on record was 393 mm in 1998.
The hottest September reached 40°C in 2019. The coldest dipped to 8.4°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 30.1°C to 31.6°C and overnight lows from 18.6°C to 20.5°C over the same span.
September is one of the warmer months of the year in Tallahassee and about average for rainfall, so plan for around 31.1°C daytime highs and 20.2°C at night.
Not quite — September is the 9th coolest month in Tallahassee, averaging 25.7°C.
For September in Tallahassee, pack light, breathable clothing and sun protection, with typical highs of 31.1°C and lows of 20.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 78% — quite humid.
Average wind speed in September is 0.2 m/s. The windiest September on record averaged 0.3 m/s (1981).
The wettest September on record was 1998 with 393 mm. On average, September sees 118 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 Tallahassee 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.
