October is one of the warmer months of the year in Cornwall, with average highs near 14°C and lows around 4.2°C (mean 9.1°C). It is a relatively wet time of year, averaging 91 mm of rainfall and 80% relative humidity across the period.
October is one of the warmer months of the year in Cornwall. Across 45 years of records, the warmest October in Cornwall was 2021 — when the month averaged 12.9°C — while the coldest was 1981 at 5.4°C. Typical October days reach 14°C with nights near 4.2°C. The long-term trend is warming, about 0.8°C per decade.
October is a relatively wet time of year in Cornwall, averaging 91 mm of rainfall. The wettest October on record was 1995 with 177 mm, while the driest was 1994 at 20 mm.
Relative humidity in Cornwall during October averages 80%. The most humid October was 2005 at 85%, and the least humid was 2015 at 71%.
October receives about 2.4 kWh/m²/day of solar energy in Cornwall. The sunniest October was 2025 at 3 kWh/m²/day, and the cloudiest were 1988 and 2006 at 2.
Average wind speed in Cornwall during October is 0.4 m/s. The windiest Octobers were 2013, 2015 and 2017, among others at 0.5 m/s, while the calmest were 2023, 2024 and 2025, 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 | 7.9°C | 8.5°C | 8.8°C | 10.0°C | 11.1°C | +3.2°C |
| Avg High | 12.9°C | 13.3°C | 13.5°C | 14.7°C | 16.4°C | +3.5°C |
| Avg Low | 2.9°C | 3.6°C | 4.1°C | 5.2°C | 5.9°C | +3°C |
| Avg Rain | 85 mm | 86 mm | 105 mm | 98 mm | 72 mm | -13 mm |
October temperatures in Cornwall have risen by about 3.4°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -5.7°C (1990) to a record high of 31.9°C (2023).
Rainfall in October is a relatively wet time of year, averaging 91 mm, with a wettest year of 177 mm.
A good time to visit Cornwall
October is a good time to visit Cornwall, with days averaging 14°C and nights around 4.2°C (mean 9.1°C, warmer than Cornwall's yearly average) and higher rainfall. July and August are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 16.7°C | 10.9°C | 5.1°C | 29.9°C | -1.5°C | 109 mm | 74% | 0.4 m/s | 3 |
| 2024 | 16.5°C | 10.9°C | 5.3°C | 24.8°C | -3.9°C | 37 mm | 75% | 0.4 m/s | 2.9 |
| 2023 | 17.0°C | 12.3°C | 7.7°C | 31.9°C | -4.7°C | 74 mm | 79% | 0.4 m/s | 2.1 |
| 2022 | 17.0°C | 10.8°C | 4.5°C | 24.7°C | -1.6°C | 34 mm | 71% | 0.4 m/s | 2.9 |
| 2021 🔥 | 17.5°C | 12.9°C | 8.3°C | 26.2°C | 1.0°C | 99 mm | 81% | 0.4 m/s | 2.2 |
| 2020 | 13.8°C | 9.0°C | 4.2°C | 24.6°C | -4.4°C | 78 mm | 77% | 0.4 m/s | 2.2 |
| 2019 | 15.4°C | 10.4°C | 5.5°C | 22.8°C | 0.3°C | 131 mm | 82% | 0.4 m/s | 2.3 |
| 2018 | 12.2°C | 7.7°C | 3.2°C | 27.3°C | -3.3°C | 73 mm | 79% | 0.4 m/s | 2.1 |
| 2017 | 17.8°C | 12.8°C | 7.7°C | 24.8°C | 0.1°C | 150 mm | 81% | 0.5 m/s | 2.5 |
| 2016 | 15.0°C | 10.1°C | 5.1°C | 25.9°C | -2.8°C | 127 mm | 77% | 0.4 m/s | 2.4 |
| 2015 | 13.3°C | 8.2°C | 3.0°C | 23.7°C | -5.0°C | 70 mm | 71% | 0.5 m/s | 2.7 |
| 2014 | 15.5°C | 11.0°C | 6.6°C | 25.6°C | -0.9°C | 71 mm | 81% | 0.4 m/s | 2.2 |
| 2013 | 15.4°C | 10.4°C | 5.3°C | 23.9°C | -5.0°C | 68 mm | 78% | 0.5 m/s | 2.6 |
| 2012 | 15.3°C | 10.7°C | 6.2°C | 22.6°C | -1.4°C | 86 mm | 80% | 0.4 m/s | 2.2 |
| 2011 | 14.7°C | 10.2°C | 5.6°C | 24.5°C | -2.8°C | 62 mm | 80% | 0.5 m/s | 2.3 |
| 2010 | 12.7°C | 8.0°C | 3.4°C | 21.1°C | -3.6°C | 144 mm | 81% | 0.4 m/s | 2.5 |
| 2009 | 11.4°C | 7.1°C | 2.8°C | 20.1°C | -3.5°C | 96 mm | 83% | 0.4 m/s | 2.2 |
| 2008 | 13.0°C | 8.1°C | 3.2°C | 22.6°C | -5.0°C | 114 mm | 81% | 0.5 m/s | 2.6 |
| 2007 | 16.9°C | 11.8°C | 6.7°C | 26.2°C | -3.0°C | 128 mm | 81% | 0.4 m/s | 2.4 |
| 2006 | 12.1°C | 7.9°C | 3.7°C | 20.9°C | -2.5°C | 102 mm | 83% | 0.5 m/s | 2 |
| 2005 | 13.7°C | 9.6°C | 5.6°C | 26.4°C | -1.6°C | 162 mm | 85% | 0.4 m/s | 2.2 |
| 2004 | 14.5°C | 9.2°C | 4.0°C | 23.4°C | -0.8°C | 52 mm | 82% | 0.4 m/s | 2.6 |
| 2003 | 12.0°C | 7.7°C | 3.4°C | 24.7°C | -1.5°C | 176 mm | 83% | 0.4 m/s | 2.2 |
| 2002 | 12.5°C | 7.6°C | 2.6°C | 26.3°C | -4.7°C | 101 mm | 78% | 0.4 m/s | 2.5 |
| 2001 | 14.9°C | 10.3°C | 5.7°C | 24.3°C | -2.2°C | 90 mm | 77% | 0.5 m/s | 2.4 |
| 2000 | 13.5°C | 8.6°C | 3.7°C | 22.1°C | -3.5°C | 31 mm | 83% | 0.4 m/s | 2.5 |
| 1999 | 13.1°C | 7.9°C | 2.7°C | 20.9°C | -3.6°C | 82 mm | 77% | 0.5 m/s | 2.5 |
| 1998 | 14.3°C | 9.5°C | 4.7°C | 22.5°C | -0.7°C | 66 mm | 79% | 0.5 m/s | 2.8 |
| 1997 | 12.8°C | 7.5°C | 2.2°C | 24.8°C | -5.4°C | 58 mm | 79% | 0.4 m/s | 2.8 |
| 1996 | 12.8°C | 8.0°C | 3.2°C | 22.1°C | -4.1°C | 92 mm | 79% | 0.5 m/s | 2.3 |
| 1995 🌧️ | 15.0°C | 10.6°C | 6.2°C | 23.4°C | -3.1°C | 177 mm | 80% | 0.5 m/s | 2.2 |
| 1994 | 14.4°C | 9.2°C | 3.9°C | 22.7°C | -1.9°C | 20 mm | 78% | 0.4 m/s | 2.6 |
| 1993 | 12.0°C | 7.3°C | 2.5°C | 21.5°C | -3.5°C | 97 mm | 79% | 0.5 m/s | 2.2 |
| 1992 | 11.0°C | 6.3°C | 1.6°C | 20.3°C | -4.8°C | 66 mm | 81% | 0.4 m/s | 2.2 |
| 1991 | 14.5°C | 9.5°C | 4.5°C | 25.6°C | -3.7°C | 85 mm | 81% | 0.4 m/s | 2.4 |
| 1990 | 13.3°C | 8.8°C | 4.3°C | 23.6°C | -5.7°C | 118 mm | 83% | 0.4 m/s | 2.2 |
| 1989 | 14.6°C | 9.2°C | 3.8°C | 23.1°C | -2.4°C | 104 mm | 81% | 0.4 m/s | 2.4 |
| 1988 | 10.3°C | 6.1°C | 1.9°C | 24.1°C | -5.4°C | 124 mm | 82% | 0.5 m/s | 2 |
| 1987 | 12.5°C | 7.2°C | 2.0°C | 19.6°C | -4.5°C | 65 mm | 78% | 0.4 m/s | 2.5 |
| 1986 | 12.5°C | 7.4°C | 2.3°C | 19.0°C | -5.2°C | 89 mm | 83% | 0.4 m/s | 2.5 |
| 1985 | 13.6°C | 8.6°C | 3.7°C | 19.8°C | -5.2°C | 82 mm | 78% | 0.4 m/s | 2.5 |
| 1984 | 15.0°C | 9.8°C | 4.5°C | 22.0°C | -4.2°C | 39 mm | 79% | 0.4 m/s | 2.9 |
| 1983 | 13.3°C | 8.2°C | 3.1°C | 25.8°C | -5.0°C | 107 mm | 80% | 0.4 m/s | — |
| 1982 | 14.1°C | 8.8°C | 3.6°C | 20.8°C | -4.0°C | 38 mm | 80% | 0.4 m/s | — |
| 1981 ❄️ | 9.9°C | 5.4°C | 0.9°C | 17.4°C | -4.8°C | 118 mm | 84% | 0.4 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 14°C with lows near 4.2°C (mean 9.1°C), based on 45 years of NASA POWER data.
October averages 91 mm of rainfall in Cornwall, a relatively wet time of year. The wettest on record was 177 mm in 1995.
The hottest October reached 31.9°C in 2023. The coldest dipped to -5.7°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 3.4°C. Daytime highs moved from 13.2°C to 16.9°C and overnight lows from 3.2°C to 6.2°C over the same span.
October is one of the warmer months of the year in Cornwall and a relatively wet time of year, so plan for around 14°C daytime highs and 4.2°C at night.
Not quite — October is the 7th coolest month in Cornwall, averaging 9.1°C.
For October in Cornwall, pack warm layers and a jacket for chilly mornings, with typical highs of 14°C and lows of 4.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 80% — quite humid.
Average wind speed in October is 0.4 m/s. The windiest October on record averaged 0.5 m/s (1988).
The wettest October on record was 1995 with 177 mm. On average, October sees 91 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 Cornwall behaves each October, 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 October specifically, along with year-by-year records and how the month has changed over the decades.
