July is one of the warmer months of the year in Knoxville, with average highs near 30.7°C and lows around 19.7°C (mean 25.2°C). It is a relatively wet time of year, averaging 128 mm of rainfall and 72% relative humidity across the period.
July is one of the warmer months of the year in Knoxville. Across 45 years of records, the warmest July in Knoxville was 1993 — when the month averaged 28.1°C — while the coldest was 1984 at 22.1°C. Typical July days reach 30.7°C with nights near 19.7°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in Knoxville, averaging 128 mm of rainfall. The wettest July on record was 2022 with 228 mm, while the driest was 1995 at 41 mm.
Relative humidity in Knoxville during July averages 72%. The most humid July was 1989 at 83%, and the least humid was 1986 at 59%.
July receives about 5.7 kWh/m²/day of solar energy in Knoxville. The sunniest July was 2025 at 6.4 kWh/m²/day, and the cloudiest was 1984 at 4.9.
Average wind speed in Knoxville during July is 0.7 m/s. The windiest Julys were 2009, 2014 and 2015, among others at 0.8 m/s, while the calmest were 2019, 2020 and 2025, among others at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.0°C | 25.2°C | 24.7°C | 25.3°C | 26.1°C | +1.1°C |
| Avg High | 30.6°C | 30.8°C | 30.5°C | 30.6°C | 31.6°C | +1°C |
| Avg Low | 19.4°C | 19.7°C | 19.0°C | 20.1°C | 20.6°C | +1.2°C |
| Avg Rain | 122 mm | 105 mm | 134 mm | 144 mm | 139 mm | +18 mm |
July temperatures in Knoxville have risen by about 1.6°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 11.6°C (1983) to a record high of 40.2°C (2012).
Rainfall in July is a relatively wet time of year, averaging 128 mm, with a wettest year of 228 mm.
One of the best times to visit Knoxville
July is one of the best times to visit Knoxville. Expect days averaging 30.7°C and nights around 19.7°C (mean 25.2°C) — warmer than Knoxville's yearly average — with higher rainfall (128 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 | 33.0°C | 27.3°C | 21.7°C | 35.9°C | 19.3°C | 109 mm | 70% | 0.6 m/s | 6.4 |
| 2024 | 32.2°C | 26.5°C | 20.8°C | 36.8°C | 17.8°C | 152 mm | 70% | 0.7 m/s | 5.6 |
| 2023 | 30.6°C | 25.3°C | 20.0°C | 34.6°C | 16.1°C | 126 mm | 74% | 0.7 m/s | 6.1 |
| 2022 🌧️ | 32.1°C | 26.6°C | 21.2°C | 35.4°C | 19.4°C | 228 mm | 73% | 0.7 m/s | 5.8 |
| 2021 | 30.5°C | 24.9°C | 19.3°C | 35.5°C | 13.4°C | 114 mm | 72% | 0.7 m/s | 6 |
| 2020 | 31.4°C | 26.0°C | 20.6°C | 35.0°C | 17.7°C | 107 mm | 72% | 0.6 m/s | 6.2 |
| 2019 | 29.3°C | 24.8°C | 20.2°C | 33.1°C | 13.3°C | 160 mm | 78% | 0.6 m/s | 6.1 |
| 2018 | 30.4°C | 25.2°C | 20.1°C | 34.2°C | 17.2°C | 113 mm | 75% | 0.6 m/s | 6.1 |
| 2017 | 30.8°C | 25.4°C | 20.0°C | 35.3°C | 14.9°C | 118 mm | 71% | 0.7 m/s | 6.3 |
| 2016 | 32.9°C | 27.0°C | 21.2°C | 36.0°C | 17.7°C | 119 mm | 68% | 0.7 m/s | 6.2 |
| 2015 | 28.6°C | 24.3°C | 20.1°C | 32.9°C | 16.9°C | 199 mm | 82% | 0.8 m/s | 5.7 |
| 2014 | 29.4°C | 23.4°C | 17.5°C | 33.4°C | 12.4°C | 149 mm | 70% | 0.8 m/s | 6 |
| 2013 | 27.7°C | 23.2°C | 18.8°C | 30.8°C | 12.8°C | 180 mm | 83% | 0.7 m/s | 5.2 |
| 2012 | 32.2°C | 26.6°C | 21.0°C | 40.2°C | 17.1°C | 168 mm | 71% | 0.7 m/s | 6 |
| 2011 | 31.6°C | 26.3°C | 21.0°C | 34.8°C | 15.4°C | 107 mm | 73% | 0.6 m/s | 6 |
| 2010 | 32.6°C | 26.7°C | 20.8°C | 37.1°C | 14.2°C | 131 mm | 68% | 0.7 m/s | 6.3 |
| 2009 | 27.4°C | 22.3°C | 17.2°C | 30.0°C | 12.4°C | 169 mm | 78% | 0.8 m/s | 5.5 |
| 2008 | 31.6°C | 25.0°C | 18.4°C | 34.7°C | 13.0°C | 131 mm | 64% | 0.7 m/s | 6.3 |
| 2007 | 30.6°C | 24.6°C | 18.5°C | 36.0°C | 13.1°C | 135 mm | 67% | 0.7 m/s | 5.2 |
| 2006 | 32.4°C | 25.9°C | 19.5°C | 37.1°C | 12.3°C | 92 mm | 64% | 0.8 m/s | 5.9 |
| 2005 | 30.2°C | 25.3°C | 20.4°C | 36.0°C | 16.5°C | 155 mm | 77% | 0.7 m/s | 5.2 |
| 2004 | 29.9°C | 24.6°C | 19.4°C | 33.3°C | 16.3°C | 125 mm | 74% | 0.7 m/s | 5.8 |
| 2003 | 27.9°C | 23.3°C | 18.7°C | 31.2°C | 14.8°C | 173 mm | 83% | 0.7 m/s | 5.6 |
| 2002 | 32.4°C | 26.4°C | 20.4°C | 35.7°C | 17.3°C | 112 mm | 68% | 0.7 m/s | 5.7 |
| 2001 | 31.0°C | 24.9°C | 18.8°C | 34.7°C | 12.8°C | 148 mm | 67% | 0.7 m/s | 5.5 |
| 2000 | 31.1°C | 24.9°C | 18.7°C | 35.1°C | 15.8°C | 97 mm | 66% | 0.7 m/s | 5.8 |
| 1999 | 30.9°C | 25.4°C | 19.9°C | 36.3°C | 16.2°C | 135 mm | 75% | 0.6 m/s | 5.4 |
| 1998 | 29.5°C | 24.7°C | 19.9°C | 34.0°C | 17.8°C | 94 mm | 77% | 0.6 m/s | 5.4 |
| 1997 | 30.9°C | 25.1°C | 19.4°C | 34.7°C | 14.0°C | 65 mm | 71% | 0.6 m/s | 6.1 |
| 1996 | 29.8°C | 24.2°C | 18.5°C | 33.4°C | 14.1°C | 164 mm | 72% | 0.8 m/s | 5.3 |
| 1995 | 33.8°C | 26.9°C | 20.0°C | 37.3°C | 14.8°C | 41 mm | 60% | 0.7 m/s | 6.1 |
| 1994 | 28.5°C | 23.8°C | 19.2°C | 31.8°C | 15.9°C | 130 mm | 78% | 0.7 m/s | 5.1 |
| 1993 🔥 | 34.9°C | 28.1°C | 21.3°C | 37.7°C | 14.4°C | 54 mm | 60% | 0.7 m/s | 6.3 |
| 1992 | 30.2°C | 24.9°C | 19.6°C | 34.3°C | 17.5°C | 104 mm | 74% | 0.8 m/s | 5.4 |
| 1991 | 29.3°C | 24.7°C | 20.1°C | 33.3°C | 17.4°C | 121 mm | 79% | 0.6 m/s | 5.6 |
| 1990 | 30.1°C | 24.4°C | 18.7°C | 35.1°C | 14.6°C | 138 mm | 70% | 0.7 m/s | 5.6 |
| 1989 | 27.4°C | 23.3°C | 19.2°C | 30.4°C | 16.4°C | 139 mm | 83% | 0.6 m/s | 5.2 |
| 1988 | 32.4°C | 25.9°C | 19.4°C | 39.0°C | 12.3°C | 131 mm | 61% | 0.7 m/s | 5.1 |
| 1987 | 31.4°C | 25.6°C | 19.8°C | 37.0°C | 14.6°C | 83 mm | 66% | 0.7 m/s | 5.9 |
| 1986 | 34.1°C | 27.5°C | 20.9°C | 37.4°C | 14.4°C | 88 mm | 59% | 0.7 m/s | 5.8 |
| 1985 | 30.5°C | 24.7°C | 18.9°C | 35.3°C | 14.6°C | 96 mm | 68% | 0.7 m/s | 5.1 |
| 1984 ❄️ | 27.1°C | 22.1°C | 17.2°C | 31.9°C | 12.5°C | 210 mm | 80% | 0.7 m/s | 4.9 |
| 1983 | 30.7°C | 25.0°C | 19.4°C | 34.0°C | 11.6°C | 79 mm | 70% | 0.7 m/s | — |
| 1982 | 30.2°C | 25.0°C | 19.9°C | 33.1°C | 15.8°C | 165 mm | 75% | 0.6 m/s | — |
| 1981 | 31.8°C | 25.9°C | 20.0°C | 35.4°C | 15.7°C | 102 mm | 70% | 0.7 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 30.7°C with lows near 19.7°C (mean 25.2°C), based on 45 years of NASA POWER data.
July averages 128 mm of rainfall in Knoxville, a relatively wet time of year. The wettest on record was 228 mm in 2022.
The hottest July reached 40.2°C in 2012. The coldest dipped to 11.6°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.6°C. Daytime highs moved from 30.1°C to 31.7°C and overnight lows from 19.1°C to 20.6°C over the same span.
July is one of the warmer months of the year in Knoxville and a relatively wet time of year, so plan for around 30.7°C daytime highs and 19.7°C at night.
Not quite — July is the 12th coolest month in Knoxville, averaging 25.2°C.
For July in Knoxville, pack light, breathable clothing and sun protection, with typical highs of 30.7°C and lows of 19.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 72% — moderately humid.
Average wind speed in July is 0.7 m/s. The windiest July on record averaged 0.8 m/s (1992).
The wettest July on record was 2022 with 228 mm. On average, July sees 128 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 Knoxville 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.
