March is one of the cooler months of the year in Knoxville, with average highs near 14.9°C and lows around 2.9°C (mean 8.9°C). It is about average for rainfall, averaging 115 mm of rainfall and 80% relative humidity across the period.
March is one of the cooler months of the year in Knoxville. Across 45 years of records, the warmest March in Knoxville was 2012 — when the month averaged 13.9°C — while the coldest was 2013 at 4.9°C. Typical March days reach 14.9°C with nights near 2.9°C. The long-term trend is warming, about 0.4°C per decade.
March is about average for rainfall in Knoxville, averaging 115 mm of rainfall. The wettest March on record was 1994 with 263 mm, while the driest was 2016 at 54 mm.
Relative humidity in Knoxville during March averages 80%. The most humid March was 2020 at 87%, and the least humid was 2025 at 72%.
March receives about 4.2 kWh/m²/day of solar energy in Knoxville. The sunniest March was 2022 at 4.8 kWh/m²/day, and the cloudiest was 1993 at 3.2.
Average wind speed in Knoxville during March is 1.1 m/s. The windiest Marchs were 2022 and 2025 at 1.2 m/s, while the calmest were 1990 and 2003 at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.3°C | 8.1°C | 9.3°C | 8.8°C | 10.5°C | +2.2°C |
| Avg High | 14.5°C | 13.8°C | 15.5°C | 14.6°C | 16.8°C | +2.3°C |
| Avg Low | 2.1°C | 2.2°C | 3.2°C | 3.0°C | 4.2°C | +2.1°C |
| Avg Rain | 83 mm | 144 mm | 99 mm | 111 mm | 145 mm | +62 mm |
March temperatures in Knoxville have risen by about 2.3°C between 1981–1985 and 2021–2025.
March has ranged from a record low of -12°C (1993) to a record high of 28.3°C (2007).
Rainfall in March is about average for rainfall, averaging 115 mm, with a wettest year of 263 mm.
A quieter season to visit Knoxville
If your dates are flexible, the more temperate months of September and June tend to be the most comfortable for visiting Knoxville. That said, March — with days averaging 14.9°C and nights around 2.9°C (mean 8.9°C) and higher rainfall (115 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17.2°C | 10.3°C | 3.4°C | 24.1°C | -6.5°C | 125 mm | 72% | 1.2 m/s | 4.6 |
| 2024 | 17.1°C | 10.7°C | 4.3°C | 23.5°C | -4.7°C | 109 mm | 78% | 1 m/s | 4.6 |
| 2023 | 15.7°C | 9.3°C | 3.0°C | 24.2°C | -6.6°C | 119 mm | 76% | 1.1 m/s | 4.4 |
| 2022 | 16.3°C | 9.8°C | 3.3°C | 24.0°C | -8.5°C | 86 mm | 78% | 1.2 m/s | 4.8 |
| 2021 | 17.2°C | 10.8°C | 4.4°C | 22.4°C | -3.5°C | 241 mm | 78% | 1.1 m/s | 4.1 |
| 2020 | 17.0°C | 11.9°C | 6.8°C | 24.3°C | -2.7°C | 193 mm | 87% | 1 m/s | 3.4 |
| 2019 | 13.3°C | 7.4°C | 1.5°C | 21.5°C | -7.5°C | 110 mm | 80% | 1 m/s | 4.5 |
| 2018 | 13.2°C | 7.5°C | 1.9°C | 22.0°C | -4.7°C | 124 mm | 82% | 1.1 m/s | 3.9 |
| 2017 | 15.3°C | 9.2°C | 3.0°C | 23.4°C | -7.1°C | 134 mm | 76% | 1.1 m/s | 4.4 |
| 2016 | 17.1°C | 11.5°C | 5.9°C | 24.5°C | -2.9°C | 54 mm | 81% | 1 m/s | 4.5 |
| 2015 | 15.2°C | 9.0°C | 2.9°C | 22.2°C | -11.6°C | 118 mm | 82% | 1 m/s | 3.9 |
| 2014 | 13.5°C | 7.1°C | 0.7°C | 20.9°C | -9.3°C | 74 mm | 79% | 1 m/s | 4.4 |
| 2013 ❄️ | 10.4°C | 4.9°C | -0.5°C | 20.4°C | -6.6°C | 139 mm | 81% | 1 m/s | 4 |
| 2012 🔥 | 19.5°C | 13.9°C | 8.3°C | 26.8°C | -3.4°C | 133 mm | 82% | 1 m/s | 4.4 |
| 2011 | 15.0°C | 9.4°C | 3.8°C | 23.1°C | -3.2°C | 155 mm | 83% | 1 m/s | 3.7 |
| 2010 | 13.0°C | 7.7°C | 2.3°C | 21.6°C | -4.0°C | 70 mm | 82% | 1 m/s | 3.6 |
| 2009 | 15.1°C | 9.6°C | 4.2°C | 23.4°C | -9.0°C | 96 mm | 81% | 1.1 m/s | 3.7 |
| 2008 | 15.5°C | 8.9°C | 2.3°C | 20.9°C | -5.3°C | 114 mm | 78% | 1.1 m/s | 4.1 |
| 2007 | 18.6°C | 12.4°C | 6.2°C | 28.3°C | -4.9°C | 74 mm | 76% | 1 m/s | 4.6 |
| 2006 | 14.5°C | 8.4°C | 2.3°C | 24.5°C | -4.3°C | 74 mm | 77% | 1.1 m/s | 4.4 |
| 2005 | 13.1°C | 7.4°C | 1.7°C | 23.1°C | -5.2°C | 87 mm | 81% | 1.1 m/s | 4.2 |
| 2004 | 16.4°C | 10.4°C | 4.4°C | 24.9°C | -4.0°C | 114 mm | 78% | 1.1 m/s | 4.4 |
| 2003 | 16.2°C | 10.1°C | 4.0°C | 21.8°C | -4.1°C | 57 mm | 83% | 0.9 m/s | 4 |
| 2002 | 15.8°C | 9.1°C | 2.4°C | 22.8°C | -7.8°C | 204 mm | 79% | 1.1 m/s | 4.2 |
| 2001 | 12.2°C | 6.3°C | 0.4°C | 19.0°C | -6.0°C | 77 mm | 78% | 1 m/s | 4.4 |
| 2000 | 17.5°C | 10.6°C | 3.8°C | 24.3°C | -2.6°C | 91 mm | 75% | 1 m/s | 4.4 |
| 1999 | 11.9°C | 5.8°C | -0.4°C | 19.7°C | -5.5°C | 114 mm | 80% | 1 m/s | 4.2 |
| 1998 | 13.4°C | 7.9°C | 2.3°C | 25.5°C | -7.6°C | 107 mm | 81% | 1.1 m/s | 4 |
| 1997 | 16.6°C | 10.7°C | 4.7°C | 23.4°C | -5.5°C | 172 mm | 80% | 1.1 m/s | 4.6 |
| 1996 | 11.2°C | 5.5°C | -0.2°C | 20.4°C | -11.1°C | 128 mm | 79% | 1.1 m/s | 3.8 |
| 1995 | 16.7°C | 9.9°C | 3.2°C | 23.7°C | -9.3°C | 84 mm | 79% | 1 m/s | 4.4 |
| 1994 🌧️ | 13.4°C | 7.8°C | 2.1°C | 22.4°C | -4.8°C | 263 mm | 83% | 1.1 m/s | 4 |
| 1993 | 11.3°C | 6.2°C | 1.1°C | 21.9°C | -12.0°C | 140 mm | 83% | 1 m/s | 3.2 |
| 1992 | 13.5°C | 7.5°C | 1.5°C | 21.8°C | -6.3°C | 101 mm | 80% | 1.1 m/s | 4.1 |
| 1991 | 14.6°C | 9.1°C | 3.6°C | 23.4°C | -4.5°C | 191 mm | 82% | 1.1 m/s | 3.9 |
| 1990 | 15.7°C | 10.1°C | 4.5°C | 23.9°C | -5.9°C | 140 mm | 84% | 0.9 m/s | 3.9 |
| 1989 | 15.9°C | 9.8°C | 3.6°C | 24.2°C | -3.6°C | 116 mm | 84% | 1.1 m/s | 4 |
| 1988 | 14.8°C | 8.4°C | 2.1°C | 23.2°C | -5.7°C | 73 mm | 78% | 1 m/s | 4.3 |
| 1987 | 14.6°C | 8.6°C | 2.5°C | 21.2°C | -4.8°C | 65 mm | 80% | 1 m/s | 4.4 |
| 1986 | 14.9°C | 8.4°C | 1.8°C | 25.8°C | -6.7°C | 59 mm | 74% | 1.1 m/s | 4.5 |
| 1985 | 15.6°C | 9.1°C | 2.7°C | 25.1°C | -5.0°C | 57 mm | 78% | 1.1 m/s | 4.2 |
| 1984 | 12.8°C | 7.0°C | 1.2°C | 22.0°C | -7.7°C | 109 mm | 82% | 1.1 m/s | 4 |
| 1983 | 14.1°C | 8.1°C | 2.2°C | 21.6°C | -5.0°C | 72 mm | 80% | 1.1 m/s | — |
| 1982 | 15.3°C | 9.5°C | 3.7°C | 25.3°C | -7.5°C | 116 mm | 85% | 1 m/s | — |
| 1981 | 12.6°C | 6.0°C | -0.5°C | 24.8°C | -5.5°C | 81 mm | 76% | 1.1 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 14.9°C with lows near 2.9°C (mean 8.9°C), based on 45 years of NASA POWER data.
March averages 115 mm of rainfall in Knoxville, about average for rainfall. The wettest on record was 263 mm in 1994.
The hottest March reached 28.3°C in 2007. The coldest dipped to -12°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 2.3°C. Daytime highs moved from 14.1°C to 16.7°C and overnight lows from 1.9°C to 3.7°C over the same span.
March is one of the cooler months of the year in Knoxville and about average for rainfall, so plan for around 14.9°C daytime highs and 2.9°C at night.
Not quite — March is the 4th coolest month in Knoxville, averaging 8.9°C.
For March in Knoxville, pack warm layers and a jacket for chilly mornings, with typical highs of 14.9°C and lows of 2.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 80% — quite humid.
Average wind speed in March is 1.1 m/s. The windiest March on record averaged 1.2 m/s (2022).
The wettest March on record was 1994 with 263 mm. On average, March sees 115 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 March, 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 March specifically, along with year-by-year records and how the month has changed over the decades.
