July is one of the warmer months of the year in Chattanooga, with average highs near 32.6°C and lows around 20.8°C (mean 26.7°C). It is about average for rainfall, averaging 120 mm of rainfall and 71% relative humidity across the period.
July is one of the warmer months of the year in Chattanooga. Across 45 years of records, the warmest July in Chattanooga was 1993 — when the month averaged 29.3°C — while the coldest was 1984 at 24.1°C. Typical July days reach 32.6°C with nights near 20.8°C. The long-term trend is warming, about 0.2°C per decade.
July is about average for rainfall in Chattanooga, averaging 120 mm of rainfall. The wettest July on record was 2013 with 224 mm, while the driest was 1993 at 33 mm.
Relative humidity in Chattanooga during July averages 71%. The most humid July was 1989 at 84%, and the least humid was 1986 at 59%.
July receives about 5.9 kWh/m²/day of solar energy in Chattanooga. The sunniest Julys were 1997 and 2025 at 6.6 kWh/m²/day, and the cloudiest was 1984 at 5.2.
Average wind speed in Chattanooga during July is 0.4 m/s. The windiest Julys were 2023, 2024 and 2025, among others at 0.4 m/s, while the calmest were 2023, 2024 and 2025, 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 | 26.4°C | 26.6°C | 26.3°C | 26.9°C | 27.5°C | +1.1°C |
| Avg High | 32.3°C | 32.4°C | 32.4°C | 32.6°C | 33.5°C | +1.2°C |
| Avg Low | 20.4°C | 20.8°C | 20.1°C | 21.1°C | 21.6°C | +1.2°C |
| Avg Rain | 121 mm | 108 mm | 126 mm | 127 mm | 120 mm | 0 mm |
July temperatures in Chattanooga have risen by about 1.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 12.8°C (2014) to a record high of 41.2°C (2012).
Rainfall in July is about average for rainfall, averaging 120 mm, with a wettest year of 224 mm.
A good time to visit Chattanooga
July is a good time to visit Chattanooga, with days averaging 32.6°C and nights around 20.8°C (mean 26.7°C, warmer than Chattanooga's yearly average) and higher rainfall. September and May are marginally more temperate, but July still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.8°C | 28.6°C | 22.5°C | 37.3°C | 20.3°C | 85 mm | 69% | 0.4 m/s | 6.6 |
| 2024 | 34.2°C | 28.1°C | 21.9°C | 39.2°C | 18.3°C | 147 mm | 67% | 0.4 m/s | 5.4 |
| 2023 | 32.5°C | 26.8°C | 21.2°C | 37.2°C | 16.4°C | 133 mm | 72% | 0.4 m/s | 6.1 |
| 2022 | 34.7°C | 28.4°C | 22.0°C | 37.7°C | 19.5°C | 140 mm | 69% | 0.4 m/s | 6 |
| 2021 | 31.4°C | 25.8°C | 20.2°C | 36.9°C | 15.2°C | 144 mm | 75% | 0.4 m/s | 5.8 |
| 2020 | 33.4°C | 27.5°C | 21.6°C | 36.4°C | 19.3°C | 72 mm | 70% | 0.4 m/s | 6.4 |
| 2019 | 32.9°C | 27.0°C | 21.2°C | 36.9°C | 15.2°C | 111 mm | 70% | 0.4 m/s | 6.1 |
| 2018 | 31.9°C | 26.4°C | 21.0°C | 34.8°C | 18.2°C | 135 mm | 76% | 0.4 m/s | 6.4 |
| 2017 | 32.5°C | 26.8°C | 21.1°C | 37.3°C | 16.2°C | 108 mm | 74% | 0.4 m/s | 6.3 |
| 2016 | 35.3°C | 28.9°C | 22.4°C | 38.1°C | 19.2°C | 80 mm | 65% | 0.4 m/s | 6.1 |
| 2015 | 30.8°C | 26.1°C | 21.4°C | 35.0°C | 19.2°C | 185 mm | 79% | 0.4 m/s | 5.9 |
| 2014 | 30.8°C | 24.6°C | 18.5°C | 35.0°C | 12.8°C | 72 mm | 71% | 0.4 m/s | 6.3 |
| 2013 🌧️ | 29.1°C | 24.5°C | 19.9°C | 32.9°C | 15.5°C | 224 mm | 83% | 0.4 m/s | 5.4 |
| 2012 | 34.0°C | 27.9°C | 21.7°C | 41.2°C | 17.9°C | 164 mm | 69% | 0.4 m/s | 6.2 |
| 2011 | 34.2°C | 28.2°C | 22.2°C | 38.2°C | 18.8°C | 87 mm | 69% | 0.4 m/s | 6.1 |
| 2010 | 34.8°C | 28.4°C | 22.0°C | 38.7°C | 17.1°C | 103 mm | 67% | 0.4 m/s | 6.4 |
| 2009 | 30.6°C | 24.6°C | 18.5°C | 34.2°C | 13.5°C | 127 mm | 73% | 0.4 m/s | 5.8 |
| 2008 | 33.6°C | 26.7°C | 19.8°C | 36.3°C | 14.0°C | 117 mm | 63% | 0.4 m/s | 5.9 |
| 2007 | 31.5°C | 25.5°C | 19.5°C | 34.9°C | 14.6°C | 124 mm | 69% | 0.4 m/s | 5.4 |
| 2006 | 34.5°C | 27.6°C | 20.7°C | 38.9°C | 15.3°C | 75 mm | 61% | 0.4 m/s | 5.9 |
| 2005 | 31.4°C | 26.4°C | 21.4°C | 38.4°C | 17.6°C | 197 mm | 78% | 0.4 m/s | 5.4 |
| 2004 | 31.2°C | 25.8°C | 20.3°C | 35.0°C | 17.0°C | 125 mm | 76% | 0.4 m/s | 5.8 |
| 2003 | 29.8°C | 24.9°C | 20.0°C | 32.7°C | 15.9°C | 213 mm | 82% | 0.4 m/s | 5.8 |
| 2002 | 34.4°C | 27.8°C | 21.1°C | 37.5°C | 18.4°C | 93 mm | 66% | 0.4 m/s | 5.9 |
| 2001 | 32.9°C | 26.3°C | 19.8°C | 35.6°C | 13.8°C | 125 mm | 67% | 0.4 m/s | 5.9 |
| 2000 | 34.1°C | 27.0°C | 19.9°C | 38.0°C | 15.5°C | 59 mm | 61% | 0.4 m/s | 6.4 |
| 1999 | 33.0°C | 27.0°C | 20.9°C | 39.5°C | 16.4°C | 115 mm | 72% | 0.4 m/s | 6 |
| 1998 | 32.9°C | 27.3°C | 21.7°C | 37.2°C | 18.9°C | 91 mm | 72% | 0.4 m/s | 5.3 |
| 1997 | 33.0°C | 26.8°C | 20.6°C | 38.7°C | 15.0°C | 63 mm | 71% | 0.4 m/s | 6.6 |
| 1996 | 32.2°C | 26.1°C | 19.9°C | 35.9°C | 14.9°C | 125 mm | 69% | 0.4 m/s | 5.5 |
| 1995 | 34.5°C | 27.7°C | 20.9°C | 38.3°C | 16.4°C | 86 mm | 64% | 0.4 m/s | 6.3 |
| 1994 | 28.8°C | 24.3°C | 19.8°C | 33.2°C | 15.5°C | 186 mm | 82% | 0.4 m/s | 5.4 |
| 1993 🔥 | 36.3°C | 29.3°C | 22.3°C | 38.7°C | 16.2°C | 33 mm | 60% | 0.4 m/s | 6.5 |
| 1992 | 31.4°C | 26.0°C | 20.7°C | 36.0°C | 18.6°C | 120 mm | 75% | 0.4 m/s | 5.7 |
| 1991 | 30.9°C | 26.2°C | 21.4°C | 34.1°C | 19.3°C | 107 mm | 80% | 0.4 m/s | 6.1 |
| 1990 | 31.4°C | 25.6°C | 19.8°C | 37.6°C | 16.0°C | 152 mm | 71% | 0.4 m/s | 5.8 |
| 1989 | 28.7°C | 24.5°C | 20.2°C | 33.4°C | 16.8°C | 198 mm | 84% | 0.4 m/s | 5.5 |
| 1988 | 33.6°C | 27.0°C | 20.5°C | 40.0°C | 16.1°C | 131 mm | 63% | 0.4 m/s | 5.4 |
| 1987 | 33.6°C | 27.2°C | 20.8°C | 38.3°C | 15.5°C | 59 mm | 65% | 0.4 m/s | 6.2 |
| 1986 | 35.9°C | 28.7°C | 21.6°C | 39.2°C | 15.6°C | 66 mm | 59% | 0.4 m/s | 6.3 |
| 1985 | 31.9°C | 25.9°C | 20.0°C | 36.3°C | 15.7°C | 118 mm | 69% | 0.4 m/s | 5.6 |
| 1984 ❄️ | 29.5°C | 24.1°C | 18.8°C | 33.7°C | 14.5°C | 221 mm | 78% | 0.4 m/s | 5.2 |
| 1983 | 31.8°C | 26.0°C | 20.2°C | 35.4°C | 14.6°C | 74 mm | 73% | 0.4 m/s | — |
| 1982 | 31.7°C | 26.3°C | 20.9°C | 35.0°C | 17.4°C | 132 mm | 75% | 0.4 m/s | — |
| 1981 | 34.2°C | 27.6°C | 21.0°C | 37.4°C | 16.9°C | 87 mm | 66% | 0.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 32.6°C with lows near 20.8°C (mean 26.7°C), based on 45 years of NASA POWER data.
July averages 120 mm of rainfall in Chattanooga, about average for rainfall. The wettest on record was 224 mm in 2013.
The hottest July reached 41.2°C in 2012. The coldest dipped to 12.8°C in 2014.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.5°C. Daytime highs moved from 31.8°C to 33.5°C and overnight lows from 20.2°C to 21.6°C over the same span.
July is one of the warmer months of the year in Chattanooga and about average for rainfall, so plan for around 32.6°C daytime highs and 20.8°C at night.
Not quite — July is the 12th coolest month in Chattanooga, averaging 26.7°C.
For July in Chattanooga, pack light, breathable clothing and sun protection, with typical highs of 32.6°C and lows of 20.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 71% — moderately humid.
Average wind speed in July is 0.4 m/s. The windiest July on record averaged 0.4 m/s (1981).
The wettest July on record was 2013 with 224 mm. On average, July sees 120 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
