August is one of the warmer months of the year in Chester, with average highs near 22.3°C and lows around 14.3°C (mean 18.3°C). It is one of the drier months, averaging 85 mm of rainfall and 85% relative humidity across the period.
August is one of the warmer months of the year in Chester. Across 45 years of records, the warmest August in Chester was 2018 — when the month averaged 20.3°C — while the coldest was 1982 at 16°C. Typical August days reach 22.3°C with nights near 14.3°C. The long-term trend is warming, about 0.3°C per decade.
August is one of the drier months in Chester, averaging 85 mm of rainfall. The wettest August on record was 2003 with 205 mm, while the driest was 1987 at 34 mm.
Relative humidity in Chester during August averages 85%. The most humid August was 2008 at 88%, and the least humid was 1987 at 78%.
August receives about 5.1 kWh/m²/day of solar energy in Chester. The sunniest August was 2025 at 5.7 kWh/m²/day, and the cloudiest was 2008 at 4.2.
Average wind speed in Chester during August is 0.9 m/s. The windiest Augusts were 1983 and 2008 at 1.1 m/s, while the calmest were 2018, 2022 and 2024, among others at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.7°C | 18.3°C | 18.2°C | 18.8°C | 18.9°C | +1.2°C |
| Avg High | 21.8°C | 22.4°C | 22.2°C | 22.6°C | 22.8°C | +1°C |
| Avg Low | 13.7°C | 14.2°C | 14.2°C | 14.9°C | 15.0°C | +1.3°C |
| Avg Rain | 75 mm | 68 mm | 112 mm | 74 mm | 100 mm | +25 mm |
August temperatures in Chester have risen by about 1.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 7.2°C (1982) to a record high of 30.5°C (2002).
Rainfall in August is one of the drier months, averaging 85 mm, with a wettest year of 205 mm.
One of the best times to visit Chester
August is one of the best times to visit Chester. Expect days averaging 22.3°C and nights around 14.3°C (mean 18.3°C) — warmer than Chester's yearly average — with higher rainfall (85 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 22.1°C | 17.8°C | 13.4°C | 27.7°C | 9.9°C | 68 mm | 83% | 1 m/s | 5.7 |
| 2024 | 22.6°C | 18.7°C | 14.8°C | 28.0°C | 9.5°C | 70 mm | 88% | 0.8 m/s | 5 |
| 2023 | 21.8°C | 18.4°C | 15.0°C | 25.0°C | 11.0°C | 193 mm | 87% | 0.9 m/s | 4.6 |
| 2022 | 23.9°C | 20.2°C | 16.4°C | 27.8°C | 13.3°C | 90 mm | 88% | 0.8 m/s | 4.7 |
| 2021 | 23.6°C | 19.7°C | 15.8°C | 29.0°C | 12.1°C | 118 mm | 87% | 0.9 m/s | 5 |
| 2020 | 22.7°C | 18.6°C | 14.6°C | 27.0°C | 9.7°C | 61 mm | 84% | 1 m/s | 5.5 |
| 2019 | 22.6°C | 18.6°C | 14.6°C | 25.6°C | 10.4°C | 102 mm | 85% | 1 m/s | 5.4 |
| 2018 🔥 | 24.4°C | 20.3°C | 16.1°C | 28.7°C | 13.3°C | 51 mm | 86% | 0.8 m/s | 5.1 |
| 2017 | 22.1°C | 18.1°C | 14.0°C | 25.3°C | 9.7°C | 100 mm | 86% | 1 m/s | 5.2 |
| 2016 | 22.7°C | 18.8°C | 14.9°C | 26.6°C | 12.5°C | 64 mm | 86% | 1 m/s | 5.3 |
| 2015 | 23.2°C | 19.8°C | 16.3°C | 26.6°C | 12.8°C | 65 mm | 88% | 1 m/s | 5.2 |
| 2014 | 21.8°C | 18.0°C | 14.2°C | 27.0°C | 8.3°C | 62 mm | 85% | 1 m/s | 5.1 |
| 2013 | 21.6°C | 17.6°C | 13.5°C | 25.8°C | 9.2°C | 51 mm | 85% | 0.9 m/s | 5.4 |
| 2012 | 23.7°C | 19.9°C | 16.1°C | 27.9°C | 12.5°C | 74 mm | 88% | 0.8 m/s | 5.1 |
| 2011 | 21.7°C | 18.1°C | 14.5°C | 24.0°C | 11.2°C | 98 mm | 88% | 1 m/s | 4.8 |
| 2010 | 22.6°C | 18.5°C | 14.4°C | 27.6°C | 11.1°C | 70 mm | 84% | 1 m/s | 5.4 |
| 2009 | 23.0°C | 19.0°C | 15.1°C | 27.6°C | 9.2°C | 147 mm | 87% | 0.9 m/s | 5.2 |
| 2008 | 21.5°C | 17.9°C | 14.3°C | 28.3°C | 11.5°C | 111 mm | 88% | 1.1 m/s | 4.2 |
| 2007 | 22.0°C | 17.7°C | 13.4°C | 27.0°C | 8.4°C | 136 mm | 86% | 0.8 m/s | 5.3 |
| 2006 | 20.5°C | 16.7°C | 12.9°C | 25.7°C | 8.9°C | 75 mm | 85% | 1 m/s | 5.3 |
| 2005 | 22.3°C | 18.3°C | 14.2°C | 25.7°C | 10.3°C | 56 mm | 87% | 0.8 m/s | 5.1 |
| 2004 | 22.1°C | 18.3°C | 14.5°C | 25.1°C | 10.5°C | 119 mm | 88% | 0.8 m/s | 5.1 |
| 2003 🌧️ | 22.2°C | 18.4°C | 14.6°C | 26.5°C | 8.8°C | 205 mm | 88% | 0.8 m/s | 4.3 |
| 2002 | 23.6°C | 19.1°C | 14.6°C | 30.5°C | 9.7°C | 48 mm | 82% | 0.8 m/s | 5.4 |
| 2001 | 22.9°C | 18.7°C | 14.5°C | 26.9°C | 8.7°C | 73 mm | 86% | 0.8 m/s | 5.1 |
| 2000 | 21.9°C | 18.0°C | 14.1°C | 25.8°C | 10.8°C | 151 mm | 86% | 0.9 m/s | 4.8 |
| 1999 | 22.8°C | 18.6°C | 14.4°C | 27.0°C | 10.9°C | 55 mm | 81% | 1 m/s | 4.9 |
| 1998 | 22.7°C | 18.4°C | 14.2°C | 26.8°C | 10.1°C | 59 mm | 84% | 0.9 m/s | 5.4 |
| 1997 | 21.0°C | 17.3°C | 13.5°C | 26.2°C | 9.5°C | 71 mm | 86% | 0.9 m/s | 4.5 |
| 1996 | 22.1°C | 18.0°C | 13.9°C | 28.2°C | 10.9°C | 64 mm | 86% | 0.8 m/s | 5 |
| 1995 | 21.9°C | 17.7°C | 13.5°C | 28.5°C | 10.0°C | 36 mm | 83% | 1 m/s | 5.4 |
| 1994 | 22.2°C | 18.2°C | 14.2°C | 25.9°C | 9.7°C | 90 mm | 86% | 0.9 m/s | 5 |
| 1993 | 22.1°C | 18.0°C | 13.8°C | 28.0°C | 9.6°C | 55 mm | 86% | 0.8 m/s | 5.5 |
| 1992 | 21.7°C | 17.6°C | 13.6°C | 26.7°C | 10.4°C | 64 mm | 85% | 0.8 m/s | 5.3 |
| 1991 | 23.1°C | 19.0°C | 14.9°C | 27.5°C | 8.8°C | 141 mm | 83% | 1 m/s | 5.1 |
| 1990 | 24.1°C | 19.8°C | 15.5°C | 27.8°C | 10.0°C | 47 mm | 83% | 0.8 m/s | 5.3 |
| 1989 | 21.5°C | 17.8°C | 14.0°C | 25.8°C | 8.4°C | 53 mm | 84% | 0.9 m/s | 5.1 |
| 1988 | 23.1°C | 18.9°C | 14.8°C | 27.4°C | 8.9°C | 43 mm | 86% | 0.9 m/s | 4.4 |
| 1987 | 22.1°C | 17.6°C | 13.0°C | 29.7°C | 8.0°C | 34 mm | 78% | 0.9 m/s | 5.4 |
| 1986 | 21.0°C | 17.2°C | 13.4°C | 24.7°C | 7.6°C | 108 mm | 86% | 1 m/s | 4.6 |
| 1985 | 21.2°C | 17.2°C | 13.1°C | 26.6°C | 9.0°C | 147 mm | 85% | 0.9 m/s | 4.9 |
| 1984 | 23.4°C | 19.3°C | 15.2°C | 27.4°C | 10.3°C | 70 mm | 87% | 0.8 m/s | 5.5 |
| 1983 | 21.6°C | 17.9°C | 14.3°C | 24.8°C | 11.0°C | 103 mm | 87% | 1.1 m/s | — |
| 1982 ❄️ | 19.6°C | 16.0°C | 12.3°C | 25.2°C | 7.2°C | 72 mm | 86% | 0.9 m/s | — |
| 1981 | 22.6°C | 17.8°C | 13.0°C | 26.8°C | 8.8°C | 43 mm | 80% | 0.9 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 22.3°C with lows near 14.3°C (mean 18.3°C), based on 45 years of NASA POWER data.
August averages 85 mm of rainfall in Chester, one of the drier months. The wettest on record was 205 mm in 2003.
The hottest August reached 30.5°C in 2002. The coldest dipped to 7.2°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.4°C. Daytime highs moved from 21.7°C to 22.8°C and overnight lows from 13.6°C to 15.1°C over the same span.
August is one of the warmer months of the year in Chester and one of the drier months, so plan for around 22.3°C daytime highs and 14.3°C at night.
Not quite — August is the 12th coolest month in Chester, averaging 18.3°C.
For August in Chester, pack light layers you can adjust through the day, with typical highs of 22.3°C and lows of 14.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 85% — quite humid.
Average wind speed in August is 0.9 m/s. The windiest August on record averaged 1.1 m/s (1983).
The wettest August on record was 2003 with 205 mm. On average, August sees 85 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 August, 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 August specifically, along with year-by-year records and how the month has changed over the decades.
