August is one of the warmer months of the year in Truro, with average highs near 23.9°C and lows around 14.1°C (mean 19°C). It is about average for rainfall, averaging 76 mm of rainfall and 79% relative humidity across the period.
August is one of the warmer months of the year in Truro. Across 45 years of records, the warmest August in Truro was 2012 — when the month averaged 21.5°C — while the coldest was 1982 at 16.3°C. Typical August days reach 23.9°C with nights near 14.1°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Truro, averaging 76 mm of rainfall. The wettest August on record was 2008 with 202 mm, while the driest was 1995 at 21 mm.
Relative humidity in Truro during August averages 79%. The most humid August was 2008 at 89%, and the least humid were 1987 and 2025 at 69%.
August receives about 4.9 kWh/m²/day of solar energy in Truro. The sunniest August was 2025 at 5.8 kWh/m²/day, and the cloudiest was 2008 at 3.9.
Average wind speed in Truro during August is 0.5 m/s. The windiest Augusts were 2006, 2013 and 2020, among others at 0.6 m/s, while the calmest were 1996, 2003 and 2012, 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 | 18.4°C | 19.2°C | 18.5°C | 19.3°C | 20.0°C | +1.6°C |
| Avg High | 23.3°C | 24.4°C | 23.2°C | 24.1°C | 25.2°C | +1.9°C |
| Avg Low | 13.5°C | 13.9°C | 13.9°C | 14.6°C | 14.8°C | +1.3°C |
| Avg Rain | 75 mm | 60 mm | 95 mm | 76 mm | 69 mm | -6 mm |
August temperatures in Truro have risen by about 2°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.8°C (1986) to a record high of 35.5°C (2025).
Rainfall in August is about average for rainfall, averaging 76 mm, with a wettest year of 202 mm.
One of the best times to visit Truro
August is one of the best times to visit Truro. Expect days averaging 23.9°C and nights around 14.1°C (mean 19°C) — warmer than Truro's yearly average — with moderate rainfall (76 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 | 25.8°C | 19.7°C | 13.5°C | 35.5°C | 10.6°C | 47 mm | 69% | 0.5 m/s | 5.8 |
| 2024 | 24.0°C | 19.4°C | 14.9°C | 28.7°C | 9.1°C | 54 mm | 84% | 0.5 m/s | 4.9 |
| 2023 | 23.3°C | 18.6°C | 14.0°C | 26.9°C | 9.5°C | 119 mm | 82% | 0.5 m/s | 4.2 |
| 2022 | 25.9°C | 21.1°C | 16.2°C | 32.5°C | 12.6°C | 70 mm | 80% | 0.5 m/s | 4.6 |
| 2021 | 26.7°C | 21.1°C | 15.6°C | 33.8°C | 10.9°C | 60 mm | 76% | 0.5 m/s | 5 |
| 2020 | 25.3°C | 20.0°C | 14.8°C | 30.4°C | 9.6°C | 65 mm | 74% | 0.6 m/s | 5.3 |
| 2019 | 24.1°C | 19.1°C | 14.0°C | 27.6°C | 9.7°C | 59 mm | 81% | 0.5 m/s | 5.3 |
| 2018 | 26.8°C | 21.4°C | 16.0°C | 32.6°C | 12.3°C | 75 mm | 78% | 0.5 m/s | 5.1 |
| 2017 | 23.3°C | 18.6°C | 13.9°C | 27.8°C | 10.2°C | 91 mm | 82% | 0.5 m/s | 5.2 |
| 2016 | 23.5°C | 18.8°C | 14.2°C | 26.8°C | 11.8°C | 93 mm | 83% | 0.5 m/s | 5 |
| 2015 | 24.3°C | 20.2°C | 16.0°C | 30.0°C | 12.2°C | 79 mm | 87% | 0.5 m/s | 5.2 |
| 2014 | 23.0°C | 18.4°C | 13.8°C | 28.2°C | 6.6°C | 61 mm | 82% | 0.5 m/s | 4.7 |
| 2013 | 23.6°C | 18.4°C | 13.3°C | 27.8°C | 9.3°C | 65 mm | 80% | 0.6 m/s | 5.3 |
| 2012 🔥 | 26.8°C | 21.5°C | 16.3°C | 30.5°C | 12.6°C | 73 mm | 78% | 0.4 m/s | 5 |
| 2011 | 22.7°C | 18.5°C | 14.2°C | 26.0°C | 11.1°C | 92 mm | 86% | 0.5 m/s | 4.8 |
| 2010 | 23.1°C | 18.5°C | 13.9°C | 29.0°C | 9.7°C | 74 mm | 82% | 0.5 m/s | 5.2 |
| 2009 | 23.3°C | 19.0°C | 14.7°C | 28.9°C | 8.4°C | 162 mm | 85% | 0.5 m/s | 5.1 |
| 2008 🌧️ | 21.9°C | 17.9°C | 13.8°C | 26.4°C | 10.9°C | 202 mm | 89% | 0.5 m/s | 3.9 |
| 2007 | 22.0°C | 17.4°C | 12.8°C | 27.5°C | 7.9°C | 148 mm | 84% | 0.5 m/s | 5 |
| 2006 | 20.7°C | 16.4°C | 12.1°C | 26.0°C | 8.1°C | 68 mm | 84% | 0.6 m/s | 5 |
| 2005 | 23.5°C | 18.7°C | 13.8°C | 27.6°C | 10.0°C | 44 mm | 82% | 0.5 m/s | 4.9 |
| 2004 | 24.3°C | 19.5°C | 14.8°C | 28.5°C | 10.4°C | 78 mm | 80% | 0.5 m/s | 5 |
| 2003 | 22.7°C | 18.4°C | 14.1°C | 27.4°C | 8.3°C | 101 mm | 86% | 0.4 m/s | 4.3 |
| 2002 | 25.4°C | 19.8°C | 14.2°C | 34.6°C | 9.5°C | 47 mm | 73% | 0.5 m/s | 5.4 |
| 2001 | 24.7°C | 19.7°C | 14.7°C | 31.6°C | 9.1°C | 38 mm | 79% | 0.5 m/s | 5 |
| 2000 | 23.3°C | 18.5°C | 13.7°C | 27.5°C | 9.6°C | 65 mm | 81% | 0.5 m/s | 4.5 |
| 1999 | 24.1°C | 19.1°C | 14.1°C | 29.6°C | 10.6°C | 107 mm | 76% | 0.5 m/s | 4.7 |
| 1998 | 24.8°C | 19.4°C | 13.9°C | 30.8°C | 9.4°C | 72 mm | 75% | 0.5 m/s | 5.1 |
| 1997 | 23.2°C | 18.3°C | 13.4°C | 30.5°C | 8.9°C | 41 mm | 76% | 0.5 m/s | 4.3 |
| 1996 | 23.8°C | 18.7°C | 13.6°C | 32.0°C | 10.4°C | 30 mm | 80% | 0.4 m/s | 4.9 |
| 1995 | 24.1°C | 18.5°C | 12.9°C | 33.6°C | 8.4°C | 21 mm | 71% | 0.6 m/s | 4.9 |
| 1994 | 24.8°C | 19.4°C | 14.0°C | 29.8°C | 9.2°C | 46 mm | 73% | 0.5 m/s | 5 |
| 1993 | 24.7°C | 19.2°C | 13.6°C | 30.8°C | 9.5°C | 28 mm | 75% | 0.4 m/s | 5.2 |
| 1992 | 24.5°C | 19.1°C | 13.7°C | 29.8°C | 10.7°C | 58 mm | 76% | 0.5 m/s | 5 |
| 1991 | 24.0°C | 19.2°C | 14.4°C | 29.7°C | 8.5°C | 120 mm | 78% | 0.5 m/s | 4.6 |
| 1990 | 26.2°C | 20.7°C | 15.2°C | 30.5°C | 8.7°C | 78 mm | 75% | 0.4 m/s | 5.3 |
| 1989 | 24.7°C | 19.4°C | 14.1°C | 30.2°C | 7.5°C | 46 mm | 72% | 0.6 m/s | 4.8 |
| 1988 | 24.6°C | 19.7°C | 14.8°C | 30.6°C | 8.7°C | 74 mm | 79% | 0.4 m/s | 4.1 |
| 1987 | 24.5°C | 18.7°C | 12.9°C | 33.3°C | 8.1°C | 50 mm | 69% | 0.5 m/s | 5 |
| 1986 | 21.9°C | 17.3°C | 12.8°C | 26.5°C | 5.8°C | 84 mm | 81% | 0.5 m/s | 4.5 |
| 1985 | 22.4°C | 17.6°C | 12.8°C | 28.9°C | 9.9°C | 108 mm | 81% | 0.5 m/s | 4.7 |
| 1984 | 24.9°C | 20.2°C | 15.5°C | 28.4°C | 9.0°C | 111 mm | 83% | 0.4 m/s | 5.2 |
| 1983 | 22.0°C | 17.7°C | 13.4°C | 26.2°C | 8.9°C | 86 mm | 85% | 0.5 m/s | — |
| 1982 ❄️ | 20.6°C | 16.3°C | 12.0°C | 25.6°C | 6.8°C | 78 mm | 83% | 0.5 m/s | — |
| 1981 | 23.8°C | 18.3°C | 12.8°C | 28.2°C | 6.8°C | 42 mm | 77% | 0.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 23.9°C with lows near 14.1°C (mean 19°C), based on 45 years of NASA POWER data.
August averages 76 mm of rainfall in Truro, about average for rainfall. The wettest on record was 202 mm in 2008.
The hottest August reached 35.5°C in 2025. The coldest dipped to 5.8°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2°C. Daytime highs moved from 22.7°C to 25.1°C and overnight lows from 13.3°C to 14.8°C over the same span.
August is one of the warmer months of the year in Truro and about average for rainfall, so plan for around 23.9°C daytime highs and 14.1°C at night.
Not quite — August is the 12th coolest month in Truro, averaging 19°C.
For August in Truro, pack light layers you can adjust through the day, with typical highs of 23.9°C and lows of 14.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 79% — quite humid.
Average wind speed in August is 0.5 m/s. The windiest August on record averaged 0.6 m/s (1989).
The wettest August on record was 2008 with 202 mm. On average, August sees 76 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 Truro 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.
