August is one of the warmer months of the year in Penzance, with average highs near 17.4°C and lows around 16.1°C (mean 16.8°C). It is one of the drier months, averaging 70 mm of rainfall and 86% relative humidity across the period.
August is one of the warmer months of the year in Penzance. Across 45 years of records, the warmest August in Penzance was 2022 — when the month averaged 18.8°C — while the coldest was 1986 at 14.2°C. Typical August days reach 17.4°C with nights near 16.1°C. The long-term August temperature trend is broadly flat.
August is one of the drier months in Penzance, averaging 70 mm of rainfall. The wettest August on record was 2015 with 136 mm, while the driest was 1981 at 16 mm.
Relative humidity in Penzance during August averages 86%. The most humid August was 1997 at 90%, and the least humid was 2014 at 80%.
August receives about 4.6 kWh/m²/day of solar energy in Penzance. The sunniest Augusts were 1995, 2005 and 2022 at 5.2 kWh/m²/day, and the cloudiest was 2008 at 3.8.
Average wind speed in Penzance during August is 5.2 m/s. The windiest August was 1985 at 7 m/s, while the calmest was 1981 at 3.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.4°C | 16.8°C | 16.8°C | 16.6°C | 17.4°C | +1°C |
| Avg High | 17.2°C | 17.5°C | 17.4°C | 17.2°C | 18.0°C | +0.8°C |
| Avg Low | 15.7°C | 16.1°C | 16.1°C | 16.0°C | 16.7°C | +1°C |
| Avg Rain | 59 mm | 71 mm | 63 mm | 85 mm | 71 mm | +12 mm |
August temperatures in Penzance have risen by about 0.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 11.6°C (1992) to a record high of 23.2°C (2022).
Rainfall in August is one of the drier months, averaging 70 mm, with a wettest year of 136 mm.
One of the best times to visit Penzance
August is one of the best times to visit Penzance. Expect days averaging 17.4°C and nights around 16.1°C (mean 16.8°C) — warmer than Penzance's yearly average — with moderate rainfall (70 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 | 18.7°C | 18.1°C | 17.4°C | 20.5°C | 16.6°C | 43 mm | 84% | 5.4 m/s | 4.7 |
| 2024 | 18.0°C | 17.3°C | 16.7°C | 19.4°C | 14.4°C | 56 mm | 86% | 5.6 m/s | 4.5 |
| 2023 | 17.2°C | 16.7°C | 16.2°C | 18.6°C | 15.1°C | 113 mm | 89% | 5.5 m/s | 4.5 |
| 2022 🔥 | 19.6°C | 18.8°C | 17.9°C | 23.2°C | 16.4°C | 44 mm | 83% | 4.9 m/s | 5.2 |
| 2021 | 17.1°C | 16.5°C | 15.8°C | 18.4°C | 14.7°C | 88 mm | 88% | 5.2 m/s | 4.6 |
| 2020 | 17.5°C | 16.9°C | 16.3°C | 19.0°C | 13.9°C | 82 mm | 87% | 5.7 m/s | 4.4 |
| 2019 | 17.7°C | 17.1°C | 16.4°C | 19.3°C | 14.8°C | 92 mm | 85% | 5.8 m/s | 4.8 |
| 2018 | 17.5°C | 16.9°C | 16.3°C | 19.8°C | 14.5°C | 63 mm | 86% | 5 m/s | 4.2 |
| 2017 | 16.8°C | 16.2°C | 15.6°C | 18.8°C | 14.0°C | 84 mm | 85% | 5.3 m/s | 4.6 |
| 2016 | 17.5°C | 16.9°C | 16.3°C | 19.1°C | 15.2°C | 77 mm | 87% | 5.7 m/s | 4.7 |
| 2015 🌧️ | 16.6°C | 16.0°C | 15.4°C | 18.1°C | 14.2°C | 136 mm | 84% | 5.5 m/s | 4.4 |
| 2014 | 17.2°C | 16.6°C | 16.0°C | 19.2°C | 14.0°C | 90 mm | 80% | 5.9 m/s | 4.9 |
| 2013 | 18.0°C | 17.4°C | 16.8°C | 19.0°C | 15.5°C | 65 mm | 84% | 5.1 m/s | 4.8 |
| 2012 | 17.1°C | 16.6°C | 16.1°C | 18.5°C | 14.5°C | 116 mm | 88% | 6.1 m/s | 4.3 |
| 2011 | 16.5°C | 15.8°C | 15.2°C | 17.4°C | 13.3°C | 61 mm | 83% | 5.1 m/s | 4.5 |
| 2010 | 17.0°C | 16.3°C | 15.7°C | 17.9°C | 14.1°C | 68 mm | 86% | 5.5 m/s | 4.4 |
| 2009 | 17.2°C | 16.6°C | 16.1°C | 18.6°C | 14.6°C | 59 mm | 87% | 5.6 m/s | 4.3 |
| 2008 | 16.6°C | 16.2°C | 15.7°C | 17.5°C | 14.5°C | 107 mm | 89% | 6.2 m/s | 3.8 |
| 2007 | 17.0°C | 16.4°C | 15.7°C | 18.2°C | 14.7°C | 55 mm | 84% | 6.1 m/s | 5.1 |
| 2006 | 17.5°C | 16.9°C | 16.4°C | 18.9°C | 14.8°C | 60 mm | 84% | 5.7 m/s | 4.8 |
| 2005 | 17.5°C | 16.8°C | 16.0°C | 19.0°C | 14.9°C | 37 mm | 85% | 4.8 m/s | 5.2 |
| 2004 | 17.8°C | 17.2°C | 16.7°C | 19.0°C | 15.4°C | 110 mm | 86% | 5.3 m/s | 4.7 |
| 2003 | 18.5°C | 17.8°C | 17.0°C | 20.5°C | 14.8°C | 32 mm | 85% | 4.3 m/s | 4.6 |
| 2002 | 16.8°C | 16.1°C | 15.5°C | 17.9°C | 14.5°C | 50 mm | 88% | 4.7 m/s | 4.5 |
| 2001 | 17.3°C | 16.7°C | 16.0°C | 19.2°C | 14.6°C | 57 mm | 87% | 5.3 m/s | 4.4 |
| 2000 | 17.5°C | 16.9°C | 16.3°C | 19.0°C | 15.1°C | 61 mm | 86% | 5 m/s | 4.3 |
| 1999 | 17.6°C | 17.0°C | 16.5°C | 18.5°C | 15.2°C | 124 mm | 87% | 5.1 m/s | 4.5 |
| 1998 | 17.1°C | 16.3°C | 15.6°C | 19.0°C | 14.1°C | 30 mm | 87% | 4.6 m/s | 5 |
| 1997 | 18.5°C | 17.9°C | 17.2°C | 20.1°C | 14.8°C | 133 mm | 90% | 4.5 m/s | 4 |
| 1996 | 16.8°C | 16.1°C | 15.4°C | 18.5°C | 14.0°C | 62 mm | 86% | 5.2 m/s | 4.7 |
| 1995 | 19.4°C | 18.6°C | 17.8°C | 22.3°C | 15.6°C | 21 mm | 86% | 4.3 m/s | 5.2 |
| 1994 | 16.9°C | 16.3°C | 15.6°C | 18.8°C | 13.7°C | 114 mm | 86% | 5.4 m/s | 4.3 |
| 1993 | 16.5°C | 15.8°C | 15.0°C | 18.3°C | 13.4°C | 35 mm | 84% | 4.9 m/s | 4.8 |
| 1992 | 16.8°C | 16.0°C | 15.3°C | 18.2°C | 11.6°C | 119 mm | 85% | 6.2 m/s | 4.1 |
| 1991 | 17.4°C | 16.6°C | 15.8°C | 19.5°C | 14.6°C | 26 mm | 88% | 4.6 m/s | 4.6 |
| 1990 | 18.4°C | 17.5°C | 16.7°C | 22.9°C | 15.2°C | 40 mm | 85% | 4.5 m/s | 4.6 |
| 1989 | 18.4°C | 17.6°C | 16.9°C | 20.1°C | 15.4°C | 40 mm | 82% | 5.3 m/s | 5 |
| 1988 | 16.2°C | 15.4°C | 14.6°C | 18.5°C | 12.6°C | 69 mm | 87% | 5.4 m/s | 4.3 |
| 1987 | 17.1°C | 16.5°C | 15.8°C | 19.0°C | 13.6°C | 31 mm | 85% | 4.6 m/s | 4.7 |
| 1986 ❄️ | 14.9°C | 14.2°C | 13.5°C | 17.3°C | 11.9°C | 120 mm | 85% | 5.7 m/s | 4.3 |
| 1985 | 15.8°C | 15.2°C | 14.6°C | 17.2°C | 13.0°C | 119 mm | 87% | 7 m/s | 4.5 |
| 1984 | 18.5°C | 17.7°C | 16.9°C | 20.5°C | 15.1°C | 40 mm | 85% | 4.2 m/s | 4.8 |
| 1983 | 18.9°C | 17.9°C | 17.0°C | 20.2°C | 15.3°C | 36 mm | 84% | 4.3 m/s | — |
| 1982 | 17.2°C | 16.5°C | 15.8°C | 18.7°C | 12.9°C | 58 mm | 85% | 5.8 m/s | — |
| 1981 | 17.8°C | 17.0°C | 16.2°C | 19.4°C | 14.7°C | 16 mm | 86% | 3.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 17.4°C with lows near 16.1°C (mean 16.8°C), based on 45 years of NASA POWER data.
August averages 70 mm of rainfall in Penzance, one of the drier months. The wettest on record was 136 mm in 2015.
The hottest August reached 23.2°C in 2022. The coldest dipped to 11.6°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.6°C. Daytime highs moved from 17.6°C to 18.1°C and overnight lows from 16.1°C to 16.8°C over the same span.
August is one of the warmer months of the year in Penzance and one of the drier months, so plan for around 17.4°C daytime highs and 16.1°C at night.
Not quite — August is the 12th coolest month in Penzance, averaging 16.8°C.
For August in Penzance, pack light layers you can adjust through the day, with typical highs of 17.4°C and lows of 16.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 86% — quite humid.
Average wind speed in August is 5.2 m/s. The windiest August on record averaged 7 m/s (1985).
The wettest August on record was 2015 with 136 mm. On average, August sees 70 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 Penzance 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.
