May is close to Saint Austell's year-round average, with average highs near 13.8°C and lows around 10°C (mean 11.9°C). It is one of the drier months, averaging 66 mm of rainfall and 83% relative humidity across the period.
May is close to Saint Austell's year-round average. Across 45 years of records, the warmest May in Saint Austell was 2025 — when the month averaged 13.9°C — while the coldest was 1996 at 9.8°C. Typical May days reach 13.8°C with nights near 10°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Saint Austell, averaging 66 mm of rainfall. The wettest May on record was 1981 with 144 mm, while the driest was 1989 at 10 mm.
Relative humidity in Saint Austell during May averages 83%. The most humid May was 1981 at 87%, and the least humid was 2020 at 79%.
May receives about 5.5 kWh/m²/day of solar energy in Saint Austell. The sunniest May was 2020 at 6.6 kWh/m²/day, and the cloudiest were 1993 and 2006 at 4.8.
Average wind speed in Saint Austell during May is 5.3 m/s. The windiest May was 2011 at 7 m/s, while the calmest was 2018 at 3.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.2°C | 11.9°C | 12.0°C | 11.9°C | 12.8°C | +1.6°C |
| Avg High | 13.0°C | 14.0°C | 13.8°C | 13.7°C | 14.8°C | +1.8°C |
| Avg Low | 9.3°C | 9.8°C | 10.2°C | 10.1°C | 10.9°C | +1.6°C |
| Avg Rain | 64 mm | 60 mm | 79 mm | 61 mm | 62 mm | -2 mm |
May temperatures in Saint Austell have risen by about 2°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 4.2°C (1996) to a record high of 23°C (1989).
Rainfall in May is one of the drier months, averaging 66 mm, with a wettest year of 144 mm.
A good time to visit Saint Austell
May is a good time to visit Saint Austell, with days averaging 13.8°C and nights around 10°C (mean 11.9°C, close to Saint Austell's yearly average) and moderate rainfall. August and July are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🔥 | 16.0°C | 13.9°C | 11.9°C | 18.4°C | 8.1°C | 36 mm | 82% | 4.7 m/s | 6.1 |
| 2024 | 15.3°C | 13.5°C | 11.7°C | 19.1°C | 8.5°C | 79 mm | 85% | 4.6 m/s | 5.4 |
| 2023 | 15.0°C | 12.9°C | 10.9°C | 17.8°C | 9.0°C | 59 mm | 85% | 4.9 m/s | 6.2 |
| 2022 | 14.7°C | 13.0°C | 11.2°C | 16.8°C | 9.6°C | 48 mm | 85% | 4.5 m/s | 5.5 |
| 2021 | 12.5°C | 11.0°C | 9.4°C | 17.8°C | 6.6°C | 132 mm | 80% | 6.2 m/s | 5.4 |
| 2020 | 15.1°C | 12.6°C | 10.1°C | 20.8°C | 5.8°C | 21 mm | 79% | 5.2 m/s | 6.6 |
| 2019 | 13.6°C | 11.9°C | 10.2°C | 17.0°C | 7.3°C | 35 mm | 82% | 4.6 m/s | 5.9 |
| 2018 | 14.8°C | 12.6°C | 10.5°C | 18.9°C | 7.4°C | 48 mm | 84% | 3.8 m/s | 5.5 |
| 2017 | 14.7°C | 12.7°C | 10.8°C | 19.3°C | 8.2°C | 74 mm | 86% | 4.9 m/s | 5.1 |
| 2016 | 14.2°C | 12.2°C | 10.2°C | 17.0°C | 7.7°C | 55 mm | 85% | 4.4 m/s | 5.3 |
| 2015 | 13.0°C | 11.5°C | 10.0°C | 15.4°C | 8.4°C | 92 mm | 84% | 6.1 m/s | 5.3 |
| 2014 | 13.8°C | 12.2°C | 10.7°C | 17.5°C | 8.8°C | 83 mm | 84% | 4.8 m/s | 5.5 |
| 2013 | 11.8°C | 10.2°C | 8.7°C | 14.7°C | 6.5°C | 84 mm | 83% | 6.1 m/s | 5.6 |
| 2012 | 13.8°C | 11.9°C | 10.0°C | 20.3°C | 7.0°C | 46 mm | 83% | 4.5 m/s | 5.3 |
| 2011 | 13.8°C | 12.2°C | 10.7°C | 16.7°C | 8.9°C | 50 mm | 82% | 7 m/s | 5.1 |
| 2010 | 13.2°C | 11.4°C | 9.5°C | 19.3°C | 6.8°C | 45 mm | 82% | 4.4 m/s | 5.4 |
| 2009 | 13.6°C | 11.7°C | 9.9°C | 19.1°C | 7.8°C | 61 mm | 83% | 6.1 m/s | 5.5 |
| 2008 | 15.2°C | 13.1°C | 11.0°C | 19.8°C | 8.2°C | 91 mm | 85% | 4.5 m/s | 4.9 |
| 2007 | 14.0°C | 12.5°C | 10.9°C | 17.2°C | 9.2°C | 116 mm | 84% | 6.1 m/s | 5.3 |
| 2006 | 13.3°C | 11.7°C | 10.1°C | 17.5°C | 8.3°C | 107 mm | 86% | 6 m/s | 4.8 |
| 2005 | 12.8°C | 11.2°C | 9.6°C | 15.8°C | 7.0°C | 54 mm | 84% | 5.9 m/s | 5.4 |
| 2004 | 14.1°C | 12.2°C | 10.2°C | 18.6°C | 7.6°C | 38 mm | 84% | 4.3 m/s | 6 |
| 2003 | 13.3°C | 11.8°C | 10.3°C | 20.0°C | 8.4°C | 85 mm | 83% | 6 m/s | 5.1 |
| 2002 | 13.3°C | 11.7°C | 10.1°C | 16.4°C | 7.8°C | 125 mm | 84% | 6.4 m/s | 5.2 |
| 2001 | 14.6°C | 12.3°C | 10.1°C | 19.9°C | 6.9°C | 24 mm | 83% | 4.5 m/s | 5.9 |
| 2000 | 14.0°C | 12.0°C | 10.0°C | 18.3°C | 7.3°C | 94 mm | 85% | 5.4 m/s | 5 |
| 1999 | 14.5°C | 12.7°C | 10.9°C | 17.2°C | 8.9°C | 53 mm | 86% | 5.5 m/s | 4.9 |
| 1998 | 14.8°C | 12.9°C | 11.0°C | 19.7°C | 7.7°C | 40 mm | 86% | 4.9 m/s | 6.1 |
| 1997 | 14.4°C | 12.1°C | 9.9°C | 18.6°C | 5.7°C | 79 mm | 82% | 5.9 m/s | 6 |
| 1996 ❄️ | 11.9°C | 9.8°C | 7.6°C | 15.9°C | 4.2°C | 101 mm | 80% | 6.1 m/s | 5.2 |
| 1995 | 13.7°C | 11.6°C | 9.6°C | 21.8°C | 6.1°C | 41 mm | 81% | 5 m/s | 5.3 |
| 1994 | 12.9°C | 11.1°C | 9.3°C | 15.7°C | 7.1°C | 102 mm | 84% | 4.8 m/s | 5.2 |
| 1993 | 13.7°C | 11.6°C | 9.5°C | 18.0°C | 7.1°C | 128 mm | 83% | 5.8 m/s | 4.8 |
| 1992 | 14.8°C | 12.6°C | 10.3°C | 20.2°C | 7.6°C | 26 mm | 83% | 5.4 m/s | 5.6 |
| 1991 | 13.2°C | 11.2°C | 9.3°C | 17.0°C | 6.4°C | 11 mm | 84% | 4.9 m/s | 5.3 |
| 1990 | 15.7°C | 13.3°C | 11.0°C | 21.6°C | 9.3°C | 22 mm | 80% | 4.3 m/s | 5.8 |
| 1989 | 16.0°C | 13.4°C | 10.9°C | 23.0°C | 8.6°C | 10 mm | 82% | 4.2 m/s | 5.9 |
| 1988 | 13.6°C | 11.7°C | 9.8°C | 17.8°C | 8.1°C | 62 mm | 83% | 5.4 m/s | 5.7 |
| 1987 | 12.4°C | 10.6°C | 8.8°C | 15.4°C | 6.2°C | 36 mm | 83% | 5.7 m/s | 5.2 |
| 1986 | 12.1°C | 10.5°C | 8.8°C | 14.5°C | 7.0°C | 74 mm | 85% | 6.8 m/s | 5.1 |
| 1985 | 13.0°C | 11.2°C | 9.3°C | 17.2°C | 7.0°C | 46 mm | 83% | 5.2 m/s | 5.5 |
| 1984 | 12.4°C | 10.5°C | 8.5°C | 14.3°C | 5.9°C | 61 mm | 81% | 5.4 m/s | 5.3 |
| 1983 | 11.8°C | 10.3°C | 8.8°C | 14.5°C | 6.3°C | 99 mm | 85% | 5.6 m/s | — |
| 1982 | 13.3°C | 11.5°C | 9.6°C | 18.1°C | 5.5°C | 45 mm | 82% | 5 m/s | — |
| 1981 🌧️ | 12.6°C | 11.0°C | 9.5°C | 15.1°C | 5.5°C | 144 mm | 87% | 6.2 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.8°C with lows near 10°C (mean 11.9°C), based on 45 years of NASA POWER data.
May averages 66 mm of rainfall in Saint Austell, one of the drier months. The wettest on record was 144 mm in 1981.
The hottest May reached 23°C in 1989. The coldest dipped to 4.2°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 2°C. Daytime highs moved from 12.6°C to 14.7°C and overnight lows from 9.1°C to 11°C over the same span.
May is close to Saint Austell's year-round average and one of the drier months, so plan for around 13.8°C daytime highs and 10°C at night.
Not quite — May is the 7th coolest month in Saint Austell, averaging 11.9°C.
For May in Saint Austell, pack light layers you can adjust through the day, with typical highs of 13.8°C and lows of 10°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 83% — quite humid.
Average wind speed in May is 5.3 m/s. The windiest May on record averaged 7 m/s (2011).
The wettest May on record was 1981 with 144 mm. On average, May sees 66 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 Saint Austell behaves each May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
