May is one of the warmer months of the year in Chester, with average highs near 13.9°C and lows around 5°C (mean 9.5°C). It is about average for rainfall, averaging 90 mm of rainfall and 83% 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 1989 — when the month averaged 11.4°C — while the coldest were 2005 and 2019 at 7.5°C. Typical May days reach 13.9°C with nights near 5°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Chester, averaging 90 mm of rainfall. The wettest May on record was 2005 with 348 mm, while the driest was 1999 at 30 mm.
Relative humidity in Chester during May averages 83%. The most humid May was 2011 at 90%, and the least humid was 1991 at 79%.
May receives about 5.2 kWh/m²/day of solar energy in Chester. The sunniest Mays were 2018 and 2022 at 6.2 kWh/m²/day, and the cloudiest were 2005 and 2011 at 3.8.
Average wind speed in Chester during May is 0.9 m/s. The windiest May was 2005 at 1.2 m/s, while the calmest was 2014 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.7°C | 9.2°C | 9.0°C | 9.8°C | 9.9°C | +0.2°C |
| Avg High | 14.2°C | 13.9°C | 13.3°C | 14.1°C | 14.4°C | +0.2°C |
| Avg Low | 5.1°C | 4.5°C | 4.6°C | 5.5°C | 5.4°C | +0.3°C |
| Avg Rain | 79 mm | 89 mm | 116 mm | 82 mm | 81 mm | +2 mm |
May temperatures in Chester have risen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -2.9°C (1991) to a record high of 26.3°C (1992).
Rainfall in May is about average for rainfall, averaging 90 mm, with a wettest year of 348 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit Chester
May is a good time to visit Chester, with days averaging 13.9°C and nights around 5°C (mean 9.5°C, warmer than Chester's yearly average) and higher 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 | 14.6°C | 10.4°C | 6.3°C | 22.1°C | 0.9°C | 103 mm | 85% | 0.9 m/s | 4.7 |
| 2024 | 15.1°C | 10.9°C | 6.7°C | 22.6°C | 1.6°C | 65 mm | 85% | 0.8 m/s | 5.4 |
| 2023 | 13.9°C | 9.0°C | 4.1°C | 22.6°C | 1.0°C | 48 mm | 80% | 1.1 m/s | 5.8 |
| 2022 | 15.3°C | 10.4°C | 5.5°C | 25.4°C | -0.9°C | 70 mm | 81% | 0.9 m/s | 6.2 |
| 2021 | 14.3°C | 9.9°C | 5.4°C | 20.4°C | 2.6°C | 92 mm | 82% | 1 m/s | 5.2 |
| 2020 | 13.4°C | 8.8°C | 4.1°C | 22.4°C | 0.2°C | 108 mm | 81% | 1.1 m/s | 5.6 |
| 2019 | 11.5°C | 7.5°C | 3.5°C | 18.1°C | 0.5°C | 101 mm | 84% | 0.9 m/s | 4.6 |
| 2018 | 15.5°C | 10.4°C | 5.3°C | 22.1°C | 0.6°C | 65 mm | 80% | 0.9 m/s | 6.2 |
| 2017 | 13.3°C | 9.3°C | 5.2°C | 25.6°C | 1.2°C | 156 mm | 86% | 0.9 m/s | 4.9 |
| 2016 | 14.2°C | 10.1°C | 6.0°C | 23.5°C | 2.2°C | 104 mm | 84% | 0.9 m/s | 5.1 |
| 2015 | 15.1°C | 10.1°C | 5.2°C | 20.8°C | -0.6°C | 50 mm | 82% | 0.9 m/s | 5.6 |
| 2014 | 13.0°C | 8.9°C | 4.7°C | 18.4°C | 1.3°C | 40 mm | 84% | 0.7 m/s | 5 |
| 2013 | 14.2°C | 10.0°C | 5.8°C | 24.6°C | -0.3°C | 93 mm | 86% | 0.9 m/s | 5.1 |
| 2012 | 15.6°C | 11.2°C | 6.7°C | 21.9°C | 0.0°C | 62 mm | 84% | 0.9 m/s | 5.2 |
| 2011 | 13.5°C | 10.1°C | 6.7°C | 21.1°C | 3.3°C | 105 mm | 90% | 0.9 m/s | 3.8 |
| 2010 | 14.8°C | 10.5°C | 6.2°C | 22.5°C | 1.7°C | 39 mm | 81% | 1 m/s | 5.8 |
| 2009 | 14.4°C | 10.1°C | 5.9°C | 23.1°C | 3.1°C | 89 mm | 86% | 0.9 m/s | 4.7 |
| 2008 | 12.8°C | 8.6°C | 4.4°C | 18.5°C | 1.0°C | 99 mm | 82% | 1.1 m/s | 5.4 |
| 2007 | 13.3°C | 8.7°C | 4.1°C | 23.6°C | -0.6°C | 74 mm | 82% | 0.8 m/s | 5.2 |
| 2006 | 13.9°C | 10.0°C | 6.0°C | 21.6°C | 2.5°C | 131 mm | 86% | 0.8 m/s | 4.8 |
| 2005 ❄️ 🌧️ | 10.8°C | 7.5°C | 4.1°C | 16.9°C | -0.4°C | 348 mm | 87% | 1.2 m/s | 3.8 |
| 2004 | 13.5°C | 8.9°C | 4.3°C | 19.8°C | 0.3°C | 74 mm | 83% | 0.8 m/s | 4.6 |
| 2003 | 13.2°C | 8.5°C | 3.9°C | 23.9°C | -0.8°C | 73 mm | 83% | 0.8 m/s | 4.8 |
| 2002 | 13.0°C | 8.6°C | 4.1°C | 19.7°C | 0.1°C | 76 mm | 81% | 1 m/s | 5.7 |
| 2001 | 15.1°C | 10.1°C | 5.0°C | 22.8°C | -1.3°C | 86 mm | 82% | 0.8 m/s | 5.6 |
| 2000 | 12.9°C | 8.6°C | 4.3°C | 17.1°C | 0.1°C | 107 mm | 82% | 0.9 m/s | 5.1 |
| 1999 | 16.6°C | 11.3°C | 6.0°C | 23.0°C | 0.5°C | 30 mm | 81% | 0.8 m/s | 6 |
| 1998 | 16.1°C | 11.3°C | 6.4°C | 21.0°C | 0.7°C | 38 mm | 83% | 0.8 m/s | 5.8 |
| 1997 | 11.9°C | 7.8°C | 3.7°C | 19.7°C | -1.9°C | 93 mm | 83% | 0.9 m/s | 5.2 |
| 1996 | 12.5°C | 8.1°C | 3.7°C | 21.2°C | -1.6°C | 117 mm | 82% | 0.9 m/s | 4.9 |
| 1995 | 12.6°C | 8.1°C | 3.6°C | 17.0°C | -1.9°C | 44 mm | 83% | 0.8 m/s | 5.2 |
| 1994 | 13.1°C | 8.8°C | 4.5°C | 19.3°C | 2.2°C | 162 mm | 85% | 1 m/s | 4.9 |
| 1993 | 14.3°C | 9.6°C | 5.0°C | 20.2°C | -1.9°C | 86 mm | 84% | 0.8 m/s | 4.7 |
| 1992 | 14.2°C | 8.7°C | 3.1°C | 26.3°C | -1.3°C | 44 mm | 81% | 0.8 m/s | 5.6 |
| 1991 | 15.0°C | 10.0°C | 5.0°C | 24.6°C | -2.9°C | 102 mm | 79% | 0.8 m/s | 5.5 |
| 1990 | 12.4°C | 8.0°C | 3.6°C | 20.0°C | -0.4°C | 172 mm | 84% | 1 m/s | 4.7 |
| 1989 🔥 | 16.1°C | 11.4°C | 6.7°C | 22.1°C | 4.4°C | 78 mm | 85% | 0.8 m/s | 4.9 |
| 1988 | 14.8°C | 10.0°C | 5.2°C | 21.9°C | 0.1°C | 66 mm | 84% | 0.9 m/s | 5.2 |
| 1987 | 14.2°C | 9.3°C | 4.4°C | 23.9°C | 0.9°C | 65 mm | 80% | 0.9 m/s | 5.8 |
| 1986 | 14.5°C | 9.5°C | 4.6°C | 21.9°C | -1.7°C | 81 mm | 82% | 0.9 m/s | 5.6 |
| 1985 | 13.2°C | 8.5°C | 3.9°C | 20.0°C | -1.6°C | 76 mm | 83% | 0.9 m/s | 5.6 |
| 1984 | 13.8°C | 9.6°C | 5.5°C | 21.0°C | 1.8°C | 122 mm | 85% | 0.9 m/s | 4.4 |
| 1983 | 13.5°C | 9.7°C | 5.8°C | 18.2°C | -0.7°C | 108 mm | 86% | 1 m/s | — |
| 1982 | 13.5°C | 8.9°C | 4.4°C | 20.4°C | 0.3°C | 51 mm | 83% | 0.9 m/s | — |
| 1981 | 14.5°C | 10.1°C | 5.6°C | 24.1°C | -1.1°C | 61 mm | 84% | 1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.9°C with lows near 5°C (mean 9.5°C), based on 45 years of NASA POWER data.
May averages 90 mm of rainfall in Chester, about average for rainfall. The wettest on record was 348 mm in 2005.
The hottest May reached 26.3°C in 1992. The coldest dipped to -2.9°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.7°C. Daytime highs moved from 13.7°C to 14.6°C and overnight lows from 5°C to 5.6°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 13.9°C daytime highs and 5°C at night.
Not quite — May is the 7th coolest month in Chester, averaging 9.5°C.
For May in Chester, pack warm layers and a jacket for chilly mornings, with typical highs of 13.9°C and lows of 5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 83% — quite humid.
Average wind speed in May is 0.9 m/s. The windiest May on record averaged 1.2 m/s (2005).
The wettest May on record was 2005 with 348 mm. On average, May sees 90 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.
