August is one of the warmer months of the year in Chester, with average highs near 19.1°C and lows around 11.1°C (mean 15.1°C). It is about average for rainfall, averaging 74 mm of rainfall and 84% relative humidity across the period.
August is one of the warmer months of the year in Chester. Across 45 years of records, the warmest Augusts in Chester were 1995, 1997 and 2022 — when the month averaged 17.1°C — while the coldest was 1986 at 12.3°C. Typical August days reach 19.1°C with nights near 11.1°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Chester, averaging 74 mm of rainfall. The wettest August on record was 2004 with 143 mm, while the driest was 1995 at 14 mm.
Relative humidity in Chester during August averages 84%. The most humid August was 2002 at 87%, and the least humid was 2022 at 78%.
August receives about 4.1 kWh/m²/day of solar energy in Chester. The sunniest August was 1995 at 5 kWh/m²/day, and the cloudiest was 2008 at 3.4.
Average wind speed in Chester during August is 2.5 m/s. The windiest August was 1985 at 3.5 m/s, while the calmest was 1984 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.5°C | 15.2°C | 15.2°C | 14.8°C | 15.9°C | +1.4°C |
| Avg High | 18.4°C | 19.4°C | 19.1°C | 18.7°C | 20.0°C | +1.6°C |
| Avg Low | 10.5°C | 11.0°C | 11.4°C | 10.9°C | 11.8°C | +1.3°C |
| Avg Rain | 71 mm | 67 mm | 81 mm | 81 mm | 63 mm | -8 mm |
August temperatures in Chester have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.4°C (1986) to a record high of 29.4°C (1990).
Rainfall in August is about average for rainfall, averaging 74 mm, with a wettest year of 143 mm.
One of the best times to visit Chester
August is one of the best times to visit Chester. Expect days averaging 19.1°C and nights around 11.1°C (mean 15.1°C) — warmer than Chester's yearly average — with moderate rainfall (74 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 | 20.8°C | 16.3°C | 11.8°C | 25.4°C | 8.7°C | 29 mm | 81% | 2.4 m/s | 4.3 |
| 2024 | 19.4°C | 15.5°C | 11.5°C | 23.7°C | 8.3°C | 49 mm | 84% | 2.9 m/s | 4 |
| 2023 | 19.2°C | 15.5°C | 11.7°C | 24.6°C | 9.1°C | 98 mm | 85% | 2.7 m/s | 4.2 |
| 2022 | 21.7°C | 17.1°C | 12.5°C | 28.7°C | 9.5°C | 33 mm | 78% | 2 m/s | 4.7 |
| 2021 | 18.9°C | 15.0°C | 11.1°C | 21.8°C | 7.9°C | 51 mm | 85% | 2.2 m/s | 3.9 |
| 2020 | 20.0°C | 16.2°C | 12.3°C | 27.1°C | 5.6°C | 121 mm | 85% | 2.7 m/s | 3.9 |
| 2019 | 19.8°C | 15.8°C | 11.8°C | 25.2°C | 8.4°C | 100 mm | 84% | 2.8 m/s | 4.1 |
| 2018 | 19.8°C | 15.6°C | 11.5°C | 24.6°C | 7.3°C | 50 mm | 83% | 2.4 m/s | 3.8 |
| 2017 | 18.3°C | 14.4°C | 10.6°C | 22.3°C | 8.4°C | 87 mm | 85% | 2.4 m/s | 4.2 |
| 2016 | 19.3°C | 15.5°C | 11.6°C | 23.6°C | 9.1°C | 75 mm | 85% | 2.8 m/s | 4.1 |
| 2015 | 18.7°C | 14.4°C | 10.2°C | 21.5°C | 7.1°C | 89 mm | 83% | 2.4 m/s | 4.1 |
| 2014 | 17.2°C | 13.6°C | 10.1°C | 20.3°C | 7.0°C | 108 mm | 84% | 3 m/s | 4.2 |
| 2013 | 19.4°C | 15.2°C | 11.1°C | 25.3°C | 8.4°C | 74 mm | 85% | 2.4 m/s | 4.2 |
| 2012 | 18.8°C | 15.1°C | 11.5°C | 22.4°C | 7.5°C | 96 mm | 86% | 2.4 m/s | 3.8 |
| 2011 | 17.8°C | 14.1°C | 10.4°C | 22.2°C | 7.7°C | 63 mm | 84% | 2.3 m/s | 3.7 |
| 2010 | 17.8°C | 13.9°C | 10.0°C | 22.5°C | 5.7°C | 69 mm | 85% | 2.6 m/s | 4.2 |
| 2009 | 19.2°C | 15.2°C | 11.2°C | 22.5°C | 8.1°C | 64 mm | 85% | 2.8 m/s | 4 |
| 2008 | 18.8°C | 15.2°C | 11.6°C | 23.2°C | 7.8°C | 112 mm | 86% | 2.8 m/s | 3.4 |
| 2007 | 18.2°C | 14.3°C | 10.5°C | 23.0°C | 7.6°C | 58 mm | 86% | 2.6 m/s | 4.2 |
| 2006 | 17.9°C | 14.6°C | 11.3°C | 23.8°C | 8.6°C | 82 mm | 86% | 2.8 m/s | 3.9 |
| 2005 | 19.1°C | 15.0°C | 10.8°C | 23.7°C | 8.1°C | 54 mm | 84% | 2.5 m/s | 4.5 |
| 2004 🌧️ | 19.8°C | 16.1°C | 12.4°C | 23.8°C | 8.2°C | 143 mm | 86% | 2.4 m/s | 4 |
| 2003 | 20.5°C | 16.2°C | 12.0°C | 27.2°C | 6.4°C | 31 mm | 84% | 2 m/s | 4.3 |
| 2002 | 19.3°C | 15.4°C | 11.4°C | 23.5°C | 9.1°C | 91 mm | 87% | 2 m/s | 3.8 |
| 2001 | 19.2°C | 15.3°C | 11.4°C | 22.9°C | 8.6°C | 92 mm | 85% | 2.1 m/s | 3.9 |
| 2000 | 19.0°C | 15.1°C | 11.2°C | 22.7°C | 8.2°C | 82 mm | 86% | 2.1 m/s | 4.2 |
| 1999 | 18.6°C | 14.8°C | 11.0°C | 23.5°C | 7.1°C | 121 mm | 86% | 2.2 m/s | 3.8 |
| 1998 | 18.9°C | 14.7°C | 10.6°C | 23.7°C | 7.6°C | 56 mm | 85% | 2.8 m/s | 4.2 |
| 1997 | 21.5°C | 17.1°C | 12.7°C | 25.9°C | 10.0°C | 74 mm | 84% | 2.3 m/s | 4.3 |
| 1996 | 18.9°C | 15.0°C | 11.0°C | 24.7°C | 8.6°C | 74 mm | 83% | 2.4 m/s | 4.2 |
| 1995 🔥 | 21.9°C | 17.1°C | 12.3°C | 26.8°C | 7.7°C | 14 mm | 80% | 2.3 m/s | 5 |
| 1994 | 18.0°C | 14.2°C | 10.5°C | 23.3°C | 7.9°C | 75 mm | 83% | 2.6 m/s | 4.2 |
| 1993 | 17.4°C | 13.2°C | 8.9°C | 21.1°C | 5.7°C | 54 mm | 83% | 2.3 m/s | 4.2 |
| 1992 | 17.5°C | 13.8°C | 10.0°C | 20.6°C | 6.1°C | 127 mm | 82% | 3 m/s | 4.1 |
| 1991 | 20.5°C | 15.6°C | 10.7°C | 23.2°C | 8.0°C | 29 mm | 82% | 2.3 m/s | 4.1 |
| 1990 | 21.0°C | 16.6°C | 12.2°C | 29.4°C | 9.1°C | 44 mm | 79% | 2.6 m/s | 3.9 |
| 1989 | 19.1°C | 14.9°C | 10.7°C | 22.3°C | 8.2°C | 58 mm | 81% | 2.8 m/s | 4.2 |
| 1988 | 17.7°C | 13.8°C | 9.9°C | 24.0°C | 7.0°C | 69 mm | 84% | 2.9 m/s | 4.2 |
| 1987 | 18.0°C | 14.4°C | 10.8°C | 23.9°C | 6.8°C | 81 mm | 85% | 2.5 m/s | 3.8 |
| 1986 ❄️ | 15.8°C | 12.3°C | 8.8°C | 19.0°C | 5.4°C | 100 mm | 83% | 2.9 m/s | 3.8 |
| 1985 | 16.7°C | 13.3°C | 9.8°C | 20.4°C | 7.4°C | 95 mm | 85% | 3.5 m/s | 3.6 |
| 1984 | 20.8°C | 16.3°C | 11.7°C | 25.3°C | 7.9°C | 54 mm | 81% | 1.9 m/s | 4.5 |
| 1983 | 20.1°C | 15.6°C | 11.0°C | 24.3°C | 6.4°C | 45 mm | 83% | 2 m/s | — |
| 1982 | 18.1°C | 14.5°C | 10.8°C | 24.6°C | 7.7°C | 79 mm | 83% | 2.9 m/s | — |
| 1981 | 19.4°C | 15.3°C | 11.3°C | 23.2°C | 7.5°C | 58 mm | 84% | 2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 19.1°C with lows near 11.1°C (mean 15.1°C), based on 45 years of NASA POWER data.
August averages 74 mm of rainfall in Chester, about average for rainfall. The wettest on record was 143 mm in 2004.
The hottest August reached 29.4°C in 1990. The coldest dipped to 5.4°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.9°C. Daytime highs moved from 19°C to 20°C and overnight lows from 10.9°C to 11.7°C over the same span.
August is one of the warmer months of the year in Chester and about average for rainfall, so plan for around 19.1°C daytime highs and 11.1°C at night.
Not quite — August is the 11th coolest month in Chester, averaging 15.1°C.
For August in Chester, pack light layers you can adjust through the day, with typical highs of 19.1°C and lows of 11.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 84% — quite humid.
Average wind speed in August is 2.5 m/s. The windiest August on record averaged 3.5 m/s (1985).
The wettest August on record was 2004 with 143 mm. On average, August sees 74 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.
