May is one of the cooler months of the year in Ashton, with average highs near 13.2°C and lows around 7.6°C (mean 10.4°C). It is about average for rainfall, averaging 65 mm of rainfall and 80% relative humidity across the period.
May is one of the cooler months of the year in Ashton. Across 45 years of records, the warmest May in Ashton was 2019 — when the month averaged 12.4°C — while the coldest was 1992 at 8°C. Typical May days reach 13.2°C with nights near 7.6°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Ashton, averaging 65 mm of rainfall. The wettest May on record was 2010 with 158 mm, while the driest was 1999 at 17 mm.
Relative humidity in Ashton during May averages 80%. The most humid May was 2006 at 86%, and the least humid was 1988 at 76%.
May receives about 1.7 kWh/m²/day of solar energy in Ashton. The sunniest Mays were 2018, 2021 and 2022, among others at 1.9 kWh/m²/day, and the cloudiest were 1997 and 2011 at 1.5.
Average wind speed in Ashton during May is 3.1 m/s. The windiest May was 2009 at 4.1 m/s, while the calmest were 1997, 2005 and 2020 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.8°C | 10.2°C | 10.3°C | 10.8°C | 11.2°C | +1.4°C |
| Avg High | 12.6°C | 13.2°C | 13.1°C | 13.6°C | 14.2°C | +1.6°C |
| Avg Low | 7.0°C | 7.3°C | 7.6°C | 7.9°C | 8.2°C | +1.2°C |
| Avg Rain | 79 mm | 63 mm | 60 mm | 64 mm | 58 mm | -21 mm |
May temperatures in Ashton have risen by about 1.6°C between 1981–1985 and 2021–2025.
May has ranged from a record low of 1.6°C (1988) to a record high of 23°C (2021).
Rainfall in May is about average for rainfall, averaging 65 mm, with a wettest year of 158 mm.
A good time to visit Ashton
May is a good time to visit Ashton, with days averaging 13.2°C and nights around 7.6°C (mean 10.4°C, cooler than Ashton's yearly average) and moderate rainfall. February and January 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 | 14.2°C | 11.2°C | 8.2°C | 18.0°C | 6.2°C | 61 mm | 82% | 3 m/s | 1.8 |
| 2024 | 12.0°C | 9.1°C | 6.2°C | 16.3°C | 3.7°C | 33 mm | 79% | 2.8 m/s | 1.8 |
| 2023 | 14.8°C | 12.2°C | 9.6°C | 21.1°C | 7.0°C | 71 mm | 85% | 3 m/s | 1.6 |
| 2022 | 15.4°C | 12.3°C | 9.2°C | 20.7°C | 5.9°C | 48 mm | 79% | 2.7 m/s | 1.9 |
| 2021 | 14.4°C | 11.2°C | 7.9°C | 23.0°C | 4.8°C | 113 mm | 79% | 3.3 m/s | 1.9 |
| 2020 | 14.2°C | 11.1°C | 8.0°C | 20.2°C | 5.0°C | 24 mm | 81% | 2.5 m/s | 1.7 |
| 2019 🔥 | 15.8°C | 12.4°C | 8.9°C | 20.5°C | 6.3°C | 48 mm | 80% | 3 m/s | 1.7 |
| 2018 | 13.0°C | 10.4°C | 7.8°C | 17.5°C | 4.4°C | 34 mm | 80% | 3 m/s | 1.9 |
| 2017 | 12.2°C | 9.6°C | 7.0°C | 17.5°C | 3.4°C | 52 mm | 84% | 2.7 m/s | 1.9 |
| 2016 | 14.8°C | 12.0°C | 9.2°C | 21.5°C | 5.8°C | 98 mm | 77% | 3.9 m/s | 1.7 |
| 2015 | 13.6°C | 10.5°C | 7.3°C | 19.2°C | 2.7°C | 26 mm | 77% | 3.4 m/s | 1.9 |
| 2014 | 13.7°C | 10.7°C | 7.7°C | 18.1°C | 3.6°C | 52 mm | 81% | 2.9 m/s | 1.8 |
| 2013 | 13.4°C | 10.7°C | 8.0°C | 19.5°C | 4.2°C | 58 mm | 80% | 3.3 m/s | 1.7 |
| 2012 | 13.0°C | 10.0°C | 7.1°C | 17.6°C | 4.4°C | 23 mm | 80% | 3 m/s | 1.7 |
| 2011 | 13.6°C | 10.9°C | 8.2°C | 18.5°C | 3.6°C | 91 mm | 85% | 2.9 m/s | 1.5 |
| 2010 🌧️ | 12.9°C | 10.4°C | 8.0°C | 18.3°C | 3.9°C | 158 mm | 83% | 3.2 m/s | 1.6 |
| 2009 | 10.5°C | 8.3°C | 6.1°C | 16.3°C | 3.9°C | 109 mm | 83% | 4.1 m/s | 1.7 |
| 2008 | 11.7°C | 9.1°C | 6.4°C | 16.3°C | 4.3°C | 31 mm | 82% | 2.8 m/s | 1.8 |
| 2007 | 15.0°C | 11.8°C | 8.5°C | 18.7°C | 5.6°C | 45 mm | 79% | 2.9 m/s | 1.9 |
| 2006 | 12.3°C | 10.0°C | 7.8°C | 15.4°C | 4.4°C | 93 mm | 86% | 3.1 m/s | 1.6 |
| 2005 | 13.1°C | 10.2°C | 7.3°C | 17.8°C | 4.0°C | 54 mm | 81% | 2.5 m/s | 1.8 |
| 2004 | 13.2°C | 10.6°C | 8.1°C | 19.2°C | 5.5°C | 81 mm | 82% | 3.3 m/s | 1.6 |
| 2003 | 13.4°C | 10.5°C | 7.6°C | 19.6°C | 4.6°C | 69 mm | 81% | 2.9 m/s | 1.7 |
| 2002 | 14.3°C | 11.0°C | 7.8°C | 20.8°C | 2.7°C | 29 mm | 77% | 3.8 m/s | 1.7 |
| 2001 | 13.3°C | 10.9°C | 8.5°C | 19.7°C | 3.4°C | 45 mm | 80% | 3.1 m/s | 1.6 |
| 2000 | 13.8°C | 10.7°C | 7.6°C | 19.5°C | 4.8°C | 48 mm | 81% | 2.9 m/s | 1.6 |
| 1999 | 15.4°C | 12.1°C | 8.9°C | 19.6°C | 6.5°C | 17 mm | 76% | 2.9 m/s | 1.7 |
| 1998 | 13.9°C | 11.0°C | 8.1°C | 18.8°C | 4.5°C | 59 mm | 78% | 3.4 m/s | 1.7 |
| 1997 | 13.3°C | 10.5°C | 7.7°C | 19.4°C | 4.2°C | 53 mm | 82% | 2.5 m/s | 1.5 |
| 1996 | 13.3°C | 10.1°C | 6.9°C | 19.0°C | 3.4°C | 36 mm | 79% | 3 m/s | 1.7 |
| 1995 | 13.3°C | 10.5°C | 7.7°C | 18.7°C | 4.1°C | 43 mm | 81% | 2.9 m/s | 1.8 |
| 1994 | 12.7°C | 10.0°C | 7.4°C | 18.2°C | 4.5°C | 92 mm | 80% | 3.4 m/s | 1.8 |
| 1993 | 12.8°C | 9.8°C | 6.9°C | 16.7°C | 3.5°C | 92 mm | 82% | 3.1 m/s | 1.7 |
| 1992 ❄️ | 10.5°C | 8.0°C | 5.4°C | 15.5°C | 2.8°C | 92 mm | 80% | 3.5 m/s | 1.7 |
| 1991 | 12.7°C | 9.8°C | 7.0°C | 15.2°C | 5.1°C | 38 mm | 82% | 2.8 m/s | 1.8 |
| 1990 | 13.6°C | 10.5°C | 7.3°C | 19.7°C | 2.3°C | 105 mm | 78% | 3.5 m/s | 1.8 |
| 1989 | 12.9°C | 10.3°C | 7.7°C | 18.8°C | 4.4°C | 97 mm | 84% | 3.1 m/s | 1.6 |
| 1988 | 12.2°C | 8.9°C | 5.6°C | 17.1°C | 1.6°C | 84 mm | 76% | 2.7 m/s | 1.8 |
| 1987 | 13.3°C | 10.6°C | 7.8°C | 18.0°C | 4.8°C | 101 mm | 84% | 3 m/s | 1.7 |
| 1986 | 13.1°C | 10.1°C | 7.2°C | 17.9°C | 3.6°C | 56 mm | 80% | 3 m/s | 1.9 |
| 1985 | 12.6°C | 10.1°C | 7.6°C | 18.2°C | 4.9°C | 54 mm | 81% | 2.8 m/s | 1.9 |
| 1984 | 11.6°C | 9.1°C | 6.6°C | 17.2°C | 4.1°C | 78 mm | 79% | 3.3 m/s | 1.8 |
| 1983 | 11.9°C | 9.0°C | 6.2°C | 17.5°C | 3.6°C | 92 mm | 80% | 3.9 m/s | — |
| 1982 | 13.1°C | 10.3°C | 7.6°C | 17.0°C | 5.1°C | 105 mm | 77% | 3.4 m/s | — |
| 1981 | 12.4°C | 9.7°C | 7.1°C | 18.7°C | 3.9°C | 44 mm | 81% | 2.7 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.2°C with lows near 7.6°C (mean 10.4°C), based on 45 years of NASA POWER data.
May averages 65 mm of rainfall in Ashton, about average for rainfall. The wettest on record was 158 mm in 2010.
The hottest May reached 23°C in 2021. The coldest dipped to 1.6°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.6°C. Daytime highs moved from 12.3°C to 14.2°C and overnight lows from 7°C to 8.2°C over the same span.
May is one of the cooler months of the year in Ashton and about average for rainfall, so plan for around 13.2°C daytime highs and 7.6°C at night.
Not quite — May is the 5th coolest month in Ashton, averaging 10.4°C.
For May in Ashton, pack warm layers and a jacket for chilly mornings, with typical highs of 13.2°C and lows of 7.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 3.1 m/s. The windiest May on record averaged 4.1 m/s (2009).
The wettest May on record was 2010 with 158 mm. On average, May sees 65 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 Ashton 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.
