May is one of the warmer months of the year in Chester, with average highs near 14.9°C and lows around 6.4°C (mean 10.7°C). It is about average for rainfall, averaging 64 mm of rainfall and 82% relative humidity across the period.
May is one of the warmer months of the year in Chester. Across 45 years of records, the warmest May in Chester was 2024 — when the month averaged 13°C — while the coldest was 1996 at 8°C. Typical May days reach 14.9°C with nights near 6.4°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Chester, averaging 64 mm of rainfall. The wettest May on record was 2021 with 130 mm, while the driest was 2020 at 13 mm.
Relative humidity in Chester during May averages 82%. The most humid May was 1981 at 86%, and the least humid was 1990 at 78%.
May receives about 4.9 kWh/m²/day of solar energy in Chester. The sunniest Mays were 2020 and 2025 at 5.9 kWh/m²/day, and the cloudiest was 1993 at 4.1.
Average wind speed in Chester during May is 2.6 m/s. The windiest May was 1986 at 3.7 m/s, while the calmest were 2004, 2010 and 2018, among others at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.0°C | 10.5°C | 10.9°C | 10.6°C | 11.6°C | +1.6°C |
| Avg High | 14.1°C | 15.0°C | 15.1°C | 14.9°C | 16.0°C | +1.9°C |
| Avg Low | 5.8°C | 6.0°C | 6.8°C | 6.3°C | 7.2°C | +1.4°C |
| Avg Rain | 63 mm | 57 mm | 73 mm | 65 mm | 62 mm | -2 mm |
May temperatures in Chester have risen by about 2°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -1°C (1982) to a record high of 23.9°C (2017).
Rainfall in May is about average for rainfall, averaging 64 mm, with a wettest year of 130 mm.
A good time to visit Chester
May is a good time to visit Chester, with days averaging 14.9°C and nights around 6.4°C (mean 10.7°C, warmer than Chester's yearly average) and moderate rainfall. July and August 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 | 17.3°C | 12.3°C | 7.3°C | 22.7°C | 1.9°C | 38 mm | 79% | 2.4 m/s | 5.9 |
| 2024 🔥 | 17.0°C | 13.0°C | 9.0°C | 21.3°C | 6.8°C | 92 mm | 85% | 2.1 m/s | 4.4 |
| 2023 | 16.7°C | 12.0°C | 7.4°C | 19.7°C | 4.5°C | 29 mm | 82% | 2.1 m/s | 5.6 |
| 2022 | 16.0°C | 12.0°C | 7.9°C | 19.9°C | 5.5°C | 68 mm | 83% | 2.5 m/s | 4.6 |
| 2021 🌧️ | 12.7°C | 9.0°C | 5.3°C | 19.3°C | 1.6°C | 130 mm | 84% | 2.6 m/s | 4.6 |
| 2020 | 16.1°C | 11.1°C | 6.1°C | 21.6°C | 1.1°C | 13 mm | 78% | 2.6 m/s | 5.9 |
| 2019 | 14.6°C | 10.3°C | 6.0°C | 19.7°C | 2.2°C | 47 mm | 80% | 2.3 m/s | 5 |
| 2018 | 17.3°C | 12.0°C | 6.8°C | 22.8°C | 0.5°C | 42 mm | 81% | 2 m/s | 5.6 |
| 2017 | 16.8°C | 12.0°C | 7.3°C | 23.9°C | 2.4°C | 48 mm | 82% | 2.5 m/s | 5.1 |
| 2016 | 15.8°C | 11.1°C | 6.4°C | 21.4°C | 2.1°C | 46 mm | 82% | 2.5 m/s | 5.1 |
| 2015 | 13.0°C | 9.4°C | 5.7°C | 17.5°C | 0.7°C | 93 mm | 82% | 3.3 m/s | 4.6 |
| 2014 | 15.1°C | 11.3°C | 7.5°C | 20.9°C | 3.0°C | 104 mm | 84% | 2.5 m/s | 4.3 |
| 2013 | 13.0°C | 9.0°C | 5.1°C | 18.9°C | 0.6°C | 87 mm | 84% | 3.1 m/s | 4.5 |
| 2012 | 15.0°C | 10.7°C | 6.3°C | 22.9°C | -0.4°C | 70 mm | 82% | 2.4 m/s | 5 |
| 2011 | 14.5°C | 10.7°C | 6.9°C | 18.3°C | 0.9°C | 67 mm | 81% | 3.6 m/s | 4.6 |
| 2010 | 14.0°C | 9.7°C | 5.4°C | 23.3°C | 0.5°C | 42 mm | 82% | 2 m/s | 5.2 |
| 2009 | 14.8°C | 10.7°C | 6.6°C | 22.3°C | 2.3°C | 65 mm | 83% | 3.2 m/s | 4.8 |
| 2008 | 16.8°C | 12.1°C | 7.4°C | 22.6°C | 3.1°C | 55 mm | 82% | 2.5 m/s | 5 |
| 2007 | 14.7°C | 10.7°C | 6.7°C | 19.8°C | 2.2°C | 90 mm | 83% | 2.7 m/s | 4.8 |
| 2006 | 15.2°C | 11.1°C | 7.0°C | 22.2°C | 2.8°C | 125 mm | 83% | 2.8 m/s | 4.5 |
| 2005 | 14.2°C | 10.1°C | 6.1°C | 23.5°C | 0.6°C | 51 mm | 80% | 3 m/s | 5.1 |
| 2004 | 15.3°C | 11.2°C | 7.1°C | 21.1°C | 4.8°C | 44 mm | 83% | 2 m/s | 5.1 |
| 2003 | 14.5°C | 10.7°C | 6.9°C | 23.1°C | 1.7°C | 98 mm | 84% | 3.1 m/s | 4.5 |
| 2002 | 14.3°C | 10.6°C | 7.0°C | 21.1°C | 2.8°C | 79 mm | 83% | 3.2 m/s | 4.4 |
| 2001 | 15.9°C | 11.2°C | 6.5°C | 21.0°C | 0.5°C | 63 mm | 83% | 2.2 m/s | 5.1 |
| 2000 | 15.3°C | 10.7°C | 6.2°C | 21.7°C | 2.8°C | 65 mm | 83% | 2.5 m/s | 5.3 |
| 1999 | 15.6°C | 11.6°C | 7.6°C | 20.4°C | 4.0°C | 74 mm | 84% | 2.8 m/s | 4.4 |
| 1998 | 16.2°C | 11.6°C | 7.1°C | 22.3°C | 2.1°C | 36 mm | 83% | 2.5 m/s | 5.4 |
| 1997 | 15.1°C | 10.5°C | 5.9°C | 21.9°C | 1.0°C | 86 mm | 81% | 2.4 m/s | 4.9 |
| 1996 ❄️ | 12.4°C | 8.0°C | 3.6°C | 18.8°C | -0.8°C | 67 mm | 80% | 2.8 m/s | 4.6 |
| 1995 | 14.5°C | 10.1°C | 5.7°C | 22.1°C | -0.4°C | 60 mm | 81% | 2.6 m/s | 4.7 |
| 1994 | 13.5°C | 9.4°C | 5.2°C | 18.1°C | 0.7°C | 50 mm | 82% | 2.7 m/s | 4.8 |
| 1993 | 14.4°C | 10.2°C | 6.0°C | 20.2°C | 0.9°C | 88 mm | 81% | 3.2 m/s | 4.1 |
| 1992 | 16.8°C | 11.9°C | 7.0°C | 22.3°C | 1.8°C | 70 mm | 80% | 3 m/s | 5.3 |
| 1991 | 14.6°C | 10.2°C | 5.7°C | 19.2°C | 1.6°C | 16 mm | 81% | 2.6 m/s | 4.4 |
| 1990 | 16.6°C | 11.5°C | 6.4°C | 23.4°C | 3.4°C | 26 mm | 78% | 2 m/s | 5.1 |
| 1989 | 16.4°C | 11.6°C | 6.7°C | 22.7°C | 2.7°C | 26 mm | 81% | 2.3 m/s | 5.3 |
| 1988 | 15.0°C | 10.8°C | 6.5°C | 20.4°C | 3.3°C | 57 mm | 82% | 2.4 m/s | 5.1 |
| 1987 | 13.1°C | 9.1°C | 5.2°C | 19.8°C | 1.0°C | 42 mm | 82% | 2.9 m/s | 4.9 |
| 1986 | 13.4°C | 9.7°C | 6.0°C | 17.4°C | 3.2°C | 71 mm | 83% | 3.7 m/s | 4.8 |
| 1985 | 14.0°C | 9.8°C | 5.7°C | 18.8°C | 2.4°C | 78 mm | 83% | 2.5 m/s | 4.4 |
| 1984 | 13.9°C | 9.4°C | 4.8°C | 18.0°C | -0.8°C | 56 mm | 79% | 2.3 m/s | 5 |
| 1983 | 12.6°C | 9.1°C | 5.7°C | 16.9°C | 1.9°C | 102 mm | 85% | 2.7 m/s | — |
| 1982 | 14.6°C | 10.0°C | 5.3°C | 20.0°C | -1.0°C | 34 mm | 80% | 2.6 m/s | — |
| 1981 | 14.1°C | 10.3°C | 6.5°C | 20.3°C | 1.5°C | 103 mm | 86% | 2.7 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 14.9°C with lows near 6.4°C (mean 10.7°C), based on 45 years of NASA POWER data.
May averages 64 mm of rainfall in Chester, about average for rainfall. The wettest on record was 130 mm in 2021.
The hottest May reached 23.9°C in 2017. The coldest dipped to -1°C in 1982.
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 13.8°C to 15.9°C and overnight lows from 5.6°C to 7.4°C over the same span.
May is one of the warmer months of the year in Chester and about average for rainfall, so plan for around 14.9°C daytime highs and 6.4°C at night.
Not quite — May is the 8th coolest month in Chester, averaging 10.7°C.
For May in Chester, pack warm layers and a jacket for chilly mornings, with typical highs of 14.9°C and lows of 6.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 2.6 m/s. The windiest May on record averaged 3.7 m/s (1986).
The wettest May on record was 2021 with 130 mm. On average, May sees 64 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 Chester 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.
