October is one of the warmer months of the year in Chattanooga, with average highs near 23.1°C and lows around 9.8°C (mean 16.5°C). It is one of the drier months, averaging 83 mm of rainfall and 72% relative humidity across the period.
October is one of the warmer months of the year in Chattanooga. Across 45 years of records, the warmest October in Chattanooga was 2016 — when the month averaged 20.3°C — while the coldest was 1988 at 12.4°C. Typical October days reach 23.1°C with nights near 9.8°C. The long-term trend is warming, about 0.4°C per decade.
October is one of the drier months in Chattanooga, averaging 83 mm of rainfall. The wettest October on record was 2019 with 194 mm, while the driest was 2016 at 3 mm.
Relative humidity in Chattanooga during October averages 72%. The most humid Octobers were 2002 and 2009 at 85%, and the least humid was 1987 at 56%.
October receives about 3.7 kWh/m²/day of solar energy in Chattanooga. The sunniest October was 2010 at 4.6 kWh/m²/day, and the cloudiest was 2002 at 2.7.
Average wind speed in Chattanooga during October is 0.5 m/s. The windiest October was 2001 at 0.6 m/s, while the calmest were 2002, 2004 and 2020, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.8°C | 15.9°C | 16.6°C | 16.9°C | 17.2°C | +1.4°C |
| Avg High | 22.4°C | 22.7°C | 23.2°C | 23.4°C | 24.0°C | +1.6°C |
| Avg Low | 9.3°C | 9.1°C | 10.0°C | 10.3°C | 10.5°C | +1.2°C |
| Avg Rain | 90 mm | 90 mm | 69 mm | 97 mm | 63 mm | -28 mm |
October temperatures in Chattanooga have stayed relatively stable across the record.
October has ranged from a record low of -2.6°C (1987) to a record high of 37.2°C (2019).
Rainfall in October is one of the drier months, averaging 83 mm, with a wettest year of 194 mm.
A good time to visit Chattanooga
October is a good time to visit Chattanooga, with days averaging 23.1°C and nights around 9.8°C (mean 16.5°C, close to Chattanooga's yearly average) and higher rainfall. September and May are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 24.2°C | 17.4°C | 10.6°C | 31.5°C | 3.1°C | 80 mm | 69% | 0.5 m/s | 3.8 |
| 2024 | 25.3°C | 18.0°C | 10.8°C | 30.4°C | 1.3°C | 4 mm | 70% | 0.5 m/s | 4.4 |
| 2023 | 24.8°C | 17.6°C | 10.4°C | 31.5°C | 3.3°C | 13 mm | 64% | 0.5 m/s | 3.7 |
| 2022 | 23.2°C | 15.3°C | 7.4°C | 28.3°C | -1.0°C | 37 mm | 61% | 0.5 m/s | 4.3 |
| 2021 | 22.9°C | 17.6°C | 12.3°C | 28.6°C | 5.1°C | 105 mm | 82% | 0.5 m/s | 3.4 |
| 2020 | 23.7°C | 17.4°C | 11.2°C | 28.1°C | 2.9°C | 136 mm | 80% | 0.4 m/s | 3.7 |
| 2019 🌧️ | 25.8°C | 19.0°C | 12.3°C | 37.2°C | 1.4°C | 194 mm | 67% | 0.5 m/s | 3.6 |
| 2018 | 22.5°C | 17.1°C | 11.7°C | 31.9°C | 1.4°C | 85 mm | 78% | 0.5 m/s | 3.6 |
| 2017 | 23.7°C | 16.9°C | 10.1°C | 31.0°C | -1.9°C | 152 mm | 73% | 0.5 m/s | 4 |
| 2016 🔥 | 28.0°C | 20.3°C | 12.6°C | 32.6°C | 6.2°C | 3 mm | 57% | 0.5 m/s | 4.3 |
| 2015 | 21.6°C | 15.9°C | 10.3°C | 27.1°C | 1.7°C | 129 mm | 80% | 0.5 m/s | 3.7 |
| 2014 | 22.9°C | 16.7°C | 10.4°C | 31.4°C | 2.4°C | 141 mm | 77% | 0.5 m/s | 3.7 |
| 2013 | 22.9°C | 16.6°C | 10.2°C | 30.3°C | -1.9°C | 30 mm | 76% | 0.5 m/s | 3.6 |
| 2012 | 20.4°C | 14.6°C | 8.7°C | 26.2°C | -1.4°C | 82 mm | 76% | 0.5 m/s | 3.5 |
| 2011 | 21.5°C | 14.7°C | 7.8°C | 28.1°C | 1.0°C | 72 mm | 72% | 0.5 m/s | 4.1 |
| 2010 | 24.8°C | 16.9°C | 9.1°C | 31.0°C | 2.2°C | 80 mm | 60% | 0.5 m/s | 4.6 |
| 2009 | 19.8°C | 14.4°C | 9.1°C | 28.3°C | -0.4°C | 167 mm | 85% | 0.5 m/s | 2.9 |
| 2008 | 23.2°C | 16.1°C | 9.1°C | 30.0°C | -2.1°C | 68 mm | 64% | 0.5 m/s | 4.2 |
| 2007 | 25.9°C | 18.7°C | 11.4°C | 32.8°C | 1.3°C | 65 mm | 67% | 0.5 m/s | 3.8 |
| 2006 | 21.2°C | 14.6°C | 7.9°C | 31.2°C | -1.4°C | 118 mm | 72% | 0.5 m/s | 3.8 |
| 2005 | 24.9°C | 17.6°C | 10.2°C | 32.5°C | 0.7°C | 27 mm | 68% | 0.5 m/s | 3.8 |
| 2004 | 23.6°C | 18.2°C | 12.7°C | 27.7°C | 4.8°C | 77 mm | 81% | 0.4 m/s | 3.2 |
| 2003 | 23.2°C | 16.1°C | 9.1°C | 27.4°C | 3.1°C | 20 mm | 73% | 0.5 m/s | 3.7 |
| 2002 | 22.5°C | 17.6°C | 12.7°C | 30.5°C | 4.6°C | 101 mm | 85% | 0.4 m/s | 2.7 |
| 2001 | 22.3°C | 14.9°C | 7.4°C | 28.5°C | -2.0°C | 42 mm | 61% | 0.6 m/s | 4.4 |
| 2000 | 25.7°C | 17.9°C | 10.1°C | 31.3°C | -0.1°C | 5 mm | 59% | 0.5 m/s | 4 |
| 1999 | 24.0°C | 16.3°C | 8.7°C | 28.5°C | 0.1°C | 88 mm | 66% | 0.5 m/s | 4.2 |
| 1998 | 26.4°C | 18.7°C | 11.0°C | 31.4°C | 1.1°C | 31 mm | 60% | 0.5 m/s | 4.1 |
| 1997 | 21.9°C | 15.6°C | 9.2°C | 30.4°C | -0.6°C | 138 mm | 74% | 0.5 m/s | 3.9 |
| 1996 | 22.1°C | 15.5°C | 9.0°C | 27.4°C | 0.4°C | 35 mm | 74% | 0.5 m/s | 3.8 |
| 1995 | 21.1°C | 14.9°C | 8.7°C | 29.4°C | 1.4°C | 184 mm | 83% | 0.5 m/s | 3.8 |
| 1994 | 21.5°C | 15.5°C | 9.5°C | 29.1°C | 0.2°C | 130 mm | 80% | 0.4 m/s | 3.4 |
| 1993 | 22.7°C | 15.8°C | 8.9°C | 29.8°C | -0.7°C | 57 mm | 68% | 0.5 m/s | 3.2 |
| 1992 | 21.4°C | 14.9°C | 8.4°C | 25.9°C | 1.2°C | 92 mm | 76% | 0.5 m/s | 3.5 |
| 1991 | 23.7°C | 16.5°C | 9.2°C | 28.9°C | 1.6°C | 18 mm | 68% | 0.5 m/s | 4.2 |
| 1990 | 22.4°C | 15.6°C | 8.8°C | 28.1°C | 0.1°C | 129 mm | 75% | 0.5 m/s | 3.9 |
| 1989 | 21.0°C | 14.7°C | 8.4°C | 26.3°C | -1.8°C | 58 mm | 81% | 0.5 m/s | 3.8 |
| 1988 ❄️ | 19.1°C | 12.4°C | 5.8°C | 26.7°C | -0.4°C | 69 mm | 73% | 0.5 m/s | 3.4 |
| 1987 | 21.7°C | 13.2°C | 4.8°C | 27.3°C | -2.6°C | 22 mm | 56% | 0.5 m/s | 4.1 |
| 1986 | 22.4°C | 16.6°C | 10.7°C | 32.4°C | 3.2°C | 163 mm | 76% | 0.5 m/s | 3.4 |
| 1985 | 23.4°C | 17.9°C | 12.4°C | 28.6°C | 4.4°C | 100 mm | 80% | 0.5 m/s | 3 |
| 1984 | 25.7°C | 20.0°C | 14.3°C | 29.2°C | 2.4°C | 138 mm | 76% | 0.5 m/s | 2.9 |
| 1983 | 23.6°C | 16.7°C | 9.8°C | 30.1°C | 2.5°C | 81 mm | 70% | 0.5 m/s | — |
| 1982 | 22.7°C | 16.0°C | 9.3°C | 31.4°C | -0.2°C | 86 mm | 75% | 0.4 m/s | — |
| 1981 | 22.0°C | 15.1°C | 8.2°C | 31.1°C | 0.5°C | 95 mm | 69% | 0.5 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 23.1°C with lows near 9.8°C (mean 16.5°C), based on 45 years of NASA POWER data.
October averages 83 mm of rainfall in Chattanooga, one of the drier months. The wettest on record was 194 mm in 2019.
The hottest October reached 37.2°C in 2019. The coldest dipped to -2.6°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Daytime highs rose from 23.5°C to 24.1°C while overnight lows fell from 10.8°C to 10.3°C, widening the gap between day and night.
October is one of the warmer months of the year in Chattanooga and one of the drier months, so plan for around 23.1°C daytime highs and 9.8°C at night.
Not quite — October is the 7th coolest month in Chattanooga, averaging 16.5°C.
For October in Chattanooga, pack light layers you can adjust through the day, with typical highs of 23.1°C and lows of 9.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 72% — moderately humid.
Average wind speed in October is 0.5 m/s. The windiest October on record averaged 0.6 m/s (2001).
The wettest October on record was 2019 with 194 mm. On average, October sees 83 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 Chattanooga behaves each October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
