August is one of the warmer months of the year in Maryville, with average highs near 28.7°C and lows around 17.2°C (mean 23°C). It is about average for rainfall, averaging 107 mm of rainfall and 73% relative humidity across the period.
August is one of the warmer months of the year in Maryville. Across 45 years of records, the warmest August in Maryville was 2007 — when the month averaged 26.3°C — while the coldest was 1992 at 21°C. Typical August days reach 28.7°C with nights near 17.2°C. The long-term August temperature trend is broadly flat.
August is about average for rainfall in Maryville, averaging 107 mm of rainfall. The wettest August on record was 2021 with 271 mm, while the driest was 1999 at 38 mm.
Relative humidity in Maryville during August averages 73%. The most humid August was 2013 at 84%, and the least humid was 1999 at 61%.
August receives about 5.3 kWh/m²/day of solar energy in Maryville. The sunniest Augusts were 2011 and 2024 at 6.2 kWh/m²/day, and the cloudiest was 1992 at 4.4.
Average wind speed in Maryville during August is 0.3 m/s. The windiest Augusts were 2002, 2007 and 2023, among others at 0.4 m/s, while the calmest were 2022, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.7°C | 22.7°C | 23.3°C | 23.0°C | 23.2°C | +0.5°C |
| Avg High | 28.5°C | 28.5°C | 29.2°C | 28.7°C | 28.8°C | +0.3°C |
| Avg Low | 16.9°C | 16.9°C | 17.4°C | 17.4°C | 17.5°C | +0.6°C |
| Avg Rain | 102 mm | 105 mm | 99 mm | 102 mm | 139 mm | +38 mm |
August temperatures in Maryville have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 6.3°C (1986) to a record high of 38°C (1983).
Rainfall in August is about average for rainfall, averaging 107 mm, with a wettest year of 271 mm.
One of the best times to visit Maryville
August is one of the best times to visit Maryville. Expect days averaging 28.7°C and nights around 17.2°C (mean 23°C) — warmer than Maryville's yearly average — with higher rainfall (107 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 | 28.4°C | 22.6°C | 16.8°C | 33.2°C | 9.4°C | 103 mm | 74% | 0.3 m/s | 5.3 |
| 2024 | 30.5°C | 23.8°C | 17.0°C | 34.8°C | 10.6°C | 44 mm | 68% | 0.3 m/s | 6.2 |
| 2023 | 28.5°C | 23.1°C | 17.6°C | 33.2°C | 13.2°C | 169 mm | 78% | 0.4 m/s | 5.5 |
| 2022 | 28.6°C | 23.1°C | 17.6°C | 32.7°C | 14.8°C | 86 mm | 77% | 0.3 m/s | 5.4 |
| 2021 🌧️ | 28.7°C | 23.4°C | 18.1°C | 33.3°C | 14.0°C | 271 mm | 76% | 0.3 m/s | 5.3 |
| 2020 | 28.2°C | 23.0°C | 17.9°C | 31.5°C | 14.6°C | 164 mm | 79% | 0.3 m/s | 5.3 |
| 2019 | 29.3°C | 23.6°C | 17.9°C | 32.7°C | 12.1°C | 84 mm | 73% | 0.3 m/s | 5.9 |
| 2018 | 27.5°C | 22.6°C | 17.8°C | 30.2°C | 11.3°C | 149 mm | 79% | 0.3 m/s | 5.4 |
| 2017 | 27.6°C | 22.1°C | 16.5°C | 32.1°C | 12.1°C | 126 mm | 75% | 0.3 m/s | 5.4 |
| 2016 | 31.0°C | 25.0°C | 19.1°C | 33.8°C | 14.0°C | 88 mm | 72% | 0.3 m/s | 5.6 |
| 2015 | 26.9°C | 21.6°C | 16.2°C | 30.1°C | 10.3°C | 101 mm | 78% | 0.3 m/s | 5.5 |
| 2014 | 27.9°C | 22.3°C | 16.8°C | 32.5°C | 11.6°C | 111 mm | 75% | 0.3 m/s | 5.6 |
| 2013 | 26.2°C | 21.5°C | 16.9°C | 28.9°C | 12.4°C | 114 mm | 84% | 0.3 m/s | 4.9 |
| 2012 | 28.2°C | 22.3°C | 16.5°C | 33.7°C | 11.0°C | 108 mm | 73% | 0.3 m/s | 5.4 |
| 2011 | 30.9°C | 24.1°C | 17.4°C | 34.6°C | 11.9°C | 43 mm | 66% | 0.3 m/s | 6.2 |
| 2010 | 31.2°C | 25.1°C | 19.0°C | 34.2°C | 14.0°C | 96 mm | 74% | 0.3 m/s | 5.5 |
| 2009 | 26.8°C | 21.7°C | 16.6°C | 30.8°C | 13.0°C | 118 mm | 81% | 0.3 m/s | 5.3 |
| 2008 | 29.3°C | 22.8°C | 16.3°C | 33.3°C | 11.4°C | 104 mm | 65% | 0.3 m/s | 5.8 |
| 2007 🔥 | 32.8°C | 26.3°C | 19.8°C | 36.2°C | 16.6°C | 52 mm | 61% | 0.4 m/s | 5.7 |
| 2006 | 30.9°C | 24.8°C | 18.7°C | 34.3°C | 15.3°C | 129 mm | 71% | 0.3 m/s | 5.2 |
| 2005 | 29.1°C | 23.7°C | 18.3°C | 32.3°C | 15.0°C | 134 mm | 75% | 0.3 m/s | 5.1 |
| 2004 | 27.3°C | 21.4°C | 15.5°C | 31.2°C | 8.1°C | 82 mm | 74% | 0.3 m/s | 5.2 |
| 2003 | 28.1°C | 23.0°C | 18.0°C | 32.1°C | 15.7°C | 121 mm | 81% | 0.3 m/s | 5.3 |
| 2002 | 31.0°C | 24.1°C | 17.1°C | 35.6°C | 12.9°C | 76 mm | 64% | 0.4 m/s | 5.5 |
| 2001 | 27.6°C | 22.3°C | 17.0°C | 30.8°C | 11.6°C | 118 mm | 78% | 0.3 m/s | 5 |
| 2000 | 29.3°C | 23.0°C | 16.7°C | 33.9°C | 11.2°C | 60 mm | 69% | 0.4 m/s | 5.3 |
| 1999 | 30.5°C | 23.4°C | 16.3°C | 33.7°C | 10.2°C | 38 mm | 61% | 0.4 m/s | 5.9 |
| 1998 | 30.0°C | 23.4°C | 16.7°C | 34.0°C | 13.0°C | 48 mm | 66% | 0.3 m/s | 5.7 |
| 1997 | 28.2°C | 22.0°C | 15.8°C | 32.4°C | 10.2°C | 41 mm | 70% | 0.3 m/s | 5.5 |
| 1996 | 27.4°C | 22.0°C | 16.6°C | 30.0°C | 13.9°C | 91 mm | 75% | 0.3 m/s | 5.3 |
| 1995 | 30.8°C | 25.0°C | 19.1°C | 35.9°C | 16.8°C | 123 mm | 70% | 0.3 m/s | 5.1 |
| 1994 | 26.3°C | 21.3°C | 16.4°C | 29.5°C | 12.2°C | 140 mm | 79% | 0.3 m/s | 4.9 |
| 1993 | 30.0°C | 23.9°C | 17.8°C | 33.2°C | 14.5°C | 111 mm | 70% | 0.3 m/s | 5 |
| 1992 ❄️ | 26.2°C | 21.0°C | 15.8°C | 30.8°C | 9.7°C | 160 mm | 78% | 0.3 m/s | 4.4 |
| 1991 | 26.8°C | 21.8°C | 16.7°C | 33.6°C | 12.9°C | 190 mm | 81% | 0.3 m/s | 5 |
| 1990 | 29.2°C | 23.4°C | 17.6°C | 34.0°C | 14.6°C | 105 mm | 70% | 0.4 m/s | 5.1 |
| 1989 | 26.6°C | 21.5°C | 16.4°C | 29.2°C | 8.0°C | 114 mm | 80% | 0.3 m/s | 5.1 |
| 1988 | 30.5°C | 24.3°C | 18.1°C | 35.1°C | 14.4°C | 123 mm | 69% | 0.3 m/s | 4.7 |
| 1987 | 31.1°C | 24.5°C | 17.9°C | 33.9°C | 13.2°C | 56 mm | 65% | 0.3 m/s | 5 |
| 1986 | 28.3°C | 22.4°C | 16.4°C | 33.0°C | 6.3°C | 130 mm | 72% | 0.3 m/s | 4.7 |
| 1985 | 26.9°C | 21.6°C | 16.4°C | 31.7°C | 12.5°C | 144 mm | 76% | 0.3 m/s | 4.5 |
| 1984 | 26.2°C | 21.4°C | 16.6°C | 27.8°C | 10.7°C | 78 mm | 80% | 0.3 m/s | 4.7 |
| 1983 | 31.0°C | 24.6°C | 18.2°C | 38.0°C | 12.4°C | 89 mm | 65% | 0.4 m/s | — |
| 1982 | 27.0°C | 21.4°C | 15.8°C | 30.5°C | 10.0°C | 109 mm | 77% | 0.3 m/s | — |
| 1981 | 28.6°C | 22.4°C | 16.2°C | 32.7°C | 11.1°C | 70 mm | 70% | 0.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 28.7°C with lows near 17.2°C (mean 23°C), based on 45 years of NASA POWER data.
August averages 107 mm of rainfall in Maryville, about average for rainfall. The wettest on record was 271 mm in 2021.
The hottest August reached 38°C in 1983. The coldest dipped to 6.3°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 27.9°C to 28.9°C and overnight lows from 16.6°C to 17.4°C over the same span.
August is one of the warmer months of the year in Maryville and about average for rainfall, so plan for around 28.7°C daytime highs and 17.2°C at night.
Not quite — August is the 11th coolest month in Maryville, averaging 23°C.
For August in Maryville, pack light layers you can adjust through the day, with typical highs of 28.7°C and lows of 17.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 0.3 m/s. The windiest August on record averaged 0.4 m/s (1983).
The wettest August on record was 2021 with 271 mm. On average, August sees 107 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 Maryville behaves each August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
