August is one of the warmer months of the year in Falmouth, with average highs near 18.2°C and lows around 15.6°C (mean 16.9°C). It is one of the drier months, averaging 71 mm of rainfall and 84% relative humidity across the period.
August is one of the warmer months of the year in Falmouth. Across 45 years of records, the warmest August in Falmouth was 2022 — when the month averaged 19.3°C — while the coldest was 1986 at 14.2°C. Typical August days reach 18.2°C with nights near 15.6°C. The long-term August temperature trend is broadly flat.
August is one of the drier months in Falmouth, averaging 71 mm of rainfall. The wettest August on record was 2015 with 177 mm, while the driest was 1995 at 20 mm.
Relative humidity in Falmouth during August averages 84%. The most humid August was 1997 at 88%, and the least humid was 2022 at 79%.
August receives about 4.6 kWh/m²/day of solar energy in Falmouth. 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 Falmouth during August is 5.1 m/s. The windiest August was 1985 at 6.7 m/s, while the calmest was 1981 at 3.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.5°C | 16.9°C | 16.9°C | 16.6°C | 17.6°C | +1.1°C |
| Avg High | 17.9°C | 18.4°C | 18.2°C | 17.9°C | 19.0°C | +1.1°C |
| Avg Low | 15.1°C | 15.6°C | 15.6°C | 15.5°C | 16.3°C | +1.2°C |
| Avg Rain | 59 mm | 72 mm | 63 mm | 93 mm | 67 mm | +9 mm |
August temperatures in Falmouth have risen by about 0.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 11°C (1992) to a record high of 26°C (2022).
Rainfall in August is one of the drier months, averaging 71 mm, with a wettest year of 177 mm.
One of the best times to visit Falmouth
August is one of the best times to visit Falmouth. Expect days averaging 18.2°C and nights around 15.6°C (mean 16.9°C) — warmer than Falmouth's yearly average — with moderate rainfall (71 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 | 19.6°C | 18.2°C | 16.9°C | 22.3°C | 15.7°C | 48 mm | 82% | 5.4 m/s | 4.7 |
| 2024 | 18.7°C | 17.4°C | 16.2°C | 20.4°C | 13.8°C | 68 mm | 85% | 5.5 m/s | 4.5 |
| 2023 | 18.0°C | 16.8°C | 15.7°C | 19.9°C | 14.2°C | 90 mm | 88% | 5.4 m/s | 4.5 |
| 2022 🔥 | 21.0°C | 19.3°C | 17.6°C | 26.0°C | 15.4°C | 43 mm | 79% | 4.7 m/s | 5.2 |
| 2021 | 18.0°C | 16.6°C | 15.3°C | 19.8°C | 14.1°C | 67 mm | 86% | 5.1 m/s | 4.6 |
| 2020 | 18.7°C | 17.4°C | 16.1°C | 22.9°C | 13.3°C | 88 mm | 85% | 5.6 m/s | 4.4 |
| 2019 | 18.3°C | 17.1°C | 15.9°C | 20.2°C | 14.5°C | 92 mm | 85% | 5.6 m/s | 4.8 |
| 2018 | 18.4°C | 17.1°C | 15.9°C | 22.2°C | 13.8°C | 70 mm | 84% | 4.8 m/s | 4.2 |
| 2017 | 17.4°C | 16.2°C | 15.1°C | 20.6°C | 13.7°C | 88 mm | 84% | 5.2 m/s | 4.6 |
| 2016 | 18.3°C | 17.0°C | 15.8°C | 19.9°C | 14.7°C | 79 mm | 86% | 5.6 m/s | 4.7 |
| 2015 🌧️ | 17.3°C | 16.1°C | 14.9°C | 19.1°C | 13.8°C | 177 mm | 84% | 5.3 m/s | 4.4 |
| 2014 | 17.6°C | 16.4°C | 15.3°C | 19.8°C | 13.0°C | 98 mm | 79% | 5.8 m/s | 4.9 |
| 2013 | 18.7°C | 17.4°C | 16.2°C | 20.0°C | 14.9°C | 67 mm | 83% | 5 m/s | 4.8 |
| 2012 | 17.8°C | 16.7°C | 15.7°C | 19.4°C | 13.7°C | 123 mm | 87% | 6.1 m/s | 4.3 |
| 2011 | 17.1°C | 15.9°C | 14.8°C | 18.2°C | 12.8°C | 66 mm | 82% | 5 m/s | 4.5 |
| 2010 | 17.7°C | 16.4°C | 15.2°C | 19.0°C | 13.0°C | 74 mm | 85% | 5.6 m/s | 4.4 |
| 2009 | 17.7°C | 16.6°C | 15.5°C | 19.3°C | 13.8°C | 56 mm | 86% | 5.4 m/s | 4.3 |
| 2008 | 17.2°C | 16.2°C | 15.2°C | 18.7°C | 13.2°C | 108 mm | 88% | 6.3 m/s | 3.8 |
| 2007 | 17.9°C | 16.5°C | 15.0°C | 20.5°C | 13.9°C | 59 mm | 83% | 5.8 m/s | 5.1 |
| 2006 | 18.2°C | 17.0°C | 15.8°C | 20.8°C | 14.5°C | 55 mm | 83% | 5.7 m/s | 4.8 |
| 2005 | 18.3°C | 16.8°C | 15.3°C | 20.5°C | 14.3°C | 37 mm | 83% | 4.7 m/s | 5.2 |
| 2004 | 18.4°C | 17.3°C | 16.1°C | 19.9°C | 14.3°C | 118 mm | 85% | 5.4 m/s | 4.7 |
| 2003 | 19.5°C | 18.0°C | 16.5°C | 22.5°C | 14.0°C | 38 mm | 84% | 4.3 m/s | 4.6 |
| 2002 | 17.8°C | 16.4°C | 15.1°C | 19.3°C | 14.1°C | 47 mm | 86% | 4.6 m/s | 4.5 |
| 2001 | 18.3°C | 16.9°C | 15.6°C | 20.2°C | 14.4°C | 53 mm | 86% | 5.2 m/s | 4.4 |
| 2000 | 18.2°C | 17.0°C | 15.8°C | 19.8°C | 14.4°C | 56 mm | 85% | 5 m/s | 4.3 |
| 1999 | 18.2°C | 17.0°C | 15.9°C | 19.3°C | 14.5°C | 140 mm | 86% | 4.9 m/s | 4.5 |
| 1998 | 18.1°C | 16.5°C | 14.9°C | 20.3°C | 13.6°C | 30 mm | 85% | 4.6 m/s | 5 |
| 1997 | 19.3°C | 18.2°C | 17.0°C | 21.4°C | 14.2°C | 132 mm | 88% | 4.2 m/s | 4 |
| 1996 | 17.6°C | 16.2°C | 14.9°C | 19.3°C | 13.6°C | 67 mm | 84% | 5.2 m/s | 4.7 |
| 1995 | 20.7°C | 19.0°C | 17.2°C | 24.9°C | 14.9°C | 20 mm | 81% | 4.3 m/s | 5.2 |
| 1994 | 17.6°C | 16.3°C | 15.1°C | 20.3°C | 12.8°C | 111 mm | 85% | 5.3 m/s | 4.3 |
| 1993 | 17.1°C | 15.7°C | 14.4°C | 19.3°C | 12.6°C | 35 mm | 83% | 4.7 m/s | 4.8 |
| 1992 | 17.2°C | 15.9°C | 14.7°C | 19.2°C | 11.0°C | 118 mm | 84% | 5.9 m/s | 4.1 |
| 1991 | 18.4°C | 16.9°C | 15.4°C | 20.5°C | 13.9°C | 25 mm | 86% | 4.6 m/s | 4.6 |
| 1990 | 19.3°C | 17.7°C | 16.1°C | 24.4°C | 14.6°C | 38 mm | 83% | 4.5 m/s | 4.6 |
| 1989 | 19.2°C | 17.7°C | 16.3°C | 21.4°C | 14.6°C | 39 mm | 79% | 5 m/s | 5 |
| 1988 | 16.9°C | 15.5°C | 14.1°C | 19.6°C | 12.6°C | 67 mm | 85% | 5.4 m/s | 4.3 |
| 1987 | 18.0°C | 16.6°C | 15.1°C | 20.1°C | 13.4°C | 27 mm | 83% | 4.5 m/s | 4.7 |
| 1986 ❄️ | 15.4°C | 14.2°C | 13.0°C | 17.2°C | 11.2°C | 118 mm | 84% | 5.5 m/s | 4.3 |
| 1985 | 16.2°C | 15.1°C | 14.0°C | 17.5°C | 12.3°C | 125 mm | 86% | 6.7 m/s | 4.5 |
| 1984 | 19.3°C | 17.8°C | 16.2°C | 21.7°C | 13.8°C | 45 mm | 82% | 4.1 m/s | 4.8 |
| 1983 | 19.6°C | 17.9°C | 16.3°C | 21.5°C | 14.6°C | 22 mm | 82% | 4.3 m/s | — |
| 1982 | 17.8°C | 16.5°C | 15.2°C | 20.3°C | 12.8°C | 62 mm | 84% | 5.6 m/s | — |
| 1981 | 18.7°C | 17.1°C | 15.6°C | 21.4°C | 14.0°C | 23 mm | 84% | 3.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 18.2°C with lows near 15.6°C (mean 16.9°C), based on 45 years of NASA POWER data.
August averages 71 mm of rainfall in Falmouth, one of the drier months. The wettest on record was 177 mm in 2015.
The hottest August reached 26°C in 2022. The coldest dipped to 11°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.8°C. Daytime highs moved from 18.3°C to 19.1°C and overnight lows from 15.5°C to 16.3°C over the same span.
August is one of the warmer months of the year in Falmouth and one of the drier months, so plan for around 18.2°C daytime highs and 15.6°C at night.
Not quite — August is the 12th coolest month in Falmouth, averaging 16.9°C.
For August in Falmouth, pack light layers you can adjust through the day, with typical highs of 18.2°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 84% — quite humid.
Average wind speed in August is 5.1 m/s. The windiest August on record averaged 6.7 m/s (1985).
The wettest August on record was 2015 with 177 mm. On average, August sees 71 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 Falmouth 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.
