August is one of the warmer months of the year in East Grinstead, with average highs near 21.1°C and lows around 13.3°C (mean 17.2°C). It is about average for rainfall, averaging 57 mm of rainfall and 80% relative humidity across the period.
August is one of the warmer months of the year in East Grinstead. Across 45 years of records, the warmest August in East Grinstead was 2022 — when the month averaged 20°C — while the coldest was 1986 at 14.7°C. Typical August days reach 21.1°C with nights near 13.3°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in East Grinstead, averaging 57 mm of rainfall. The wettest August on record was 2004 with 124 mm, while the driest was 1995 at 6 mm.
Relative humidity in East Grinstead during August averages 80%. The most humid August was 2001 at 84%, and the least humid was 1990 at 73%.
August receives about 4.3 kWh/m²/day of solar energy in East Grinstead. The sunniest August was 1995 at 5.2 kWh/m²/day, and the cloudiest were 1986 and 2008 at 3.6.
Average wind speed in East Grinstead during August is 3.4 m/s. The windiest August was 1985 at 4.5 m/s, while the calmest were 1981 and 2002 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.4°C | 17.4°C | 17.3°C | 17.0°C | 18.2°C | +1.8°C |
| Avg High | 20.3°C | 21.5°C | 21.1°C | 20.7°C | 22.3°C | +2°C |
| Avg Low | 12.5°C | 13.3°C | 13.6°C | 13.2°C | 14.3°C | +1.8°C |
| Avg Rain | 46 mm | 57 mm | 59 mm | 68 mm | 49 mm | +3 mm |
August temperatures in East Grinstead have risen by about 1.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 6.8°C (1986) to a record high of 31.8°C (1990).
Rainfall in August is about average for rainfall, averaging 57 mm, with a wettest year of 124 mm.
One of the best times to visit East Grinstead
August is one of the best times to visit East Grinstead. Expect days averaging 21.1°C and nights around 13.3°C (mean 17.2°C) — warmer than East Grinstead's yearly average — with moderate rainfall (57 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 | 22.8°C | 18.3°C | 13.9°C | 28.4°C | 10.5°C | 23 mm | 75% | 3.5 m/s | 4.6 |
| 2024 | 22.0°C | 18.1°C | 14.1°C | 26.2°C | 11.1°C | 44 mm | 81% | 3.7 m/s | 4.3 |
| 2023 | 21.1°C | 17.3°C | 13.5°C | 24.7°C | 10.3°C | 70 mm | 83% | 3.5 m/s | 4.3 |
| 2022 🔥 | 24.6°C | 20.0°C | 15.5°C | 29.8°C | 11.1°C | 36 mm | 74% | 3.1 m/s | 4.9 |
| 2021 | 20.3°C | 16.8°C | 13.3°C | 22.1°C | 10.9°C | 46 mm | 83% | 3.8 m/s | 3.8 |
| 2020 | 22.7°C | 19.0°C | 15.4°C | 30.7°C | 9.8°C | 71 mm | 77% | 3.7 m/s | 4.1 |
| 2019 | 21.6°C | 17.9°C | 14.1°C | 28.5°C | 11.1°C | 46 mm | 79% | 3.8 m/s | 4.6 |
| 2018 | 21.9°C | 17.8°C | 13.7°C | 28.2°C | 9.3°C | 74 mm | 78% | 3.3 m/s | 4.2 |
| 2017 | 20.7°C | 16.9°C | 13.1°C | 26.1°C | 9.9°C | 75 mm | 80% | 3.4 m/s | 4.2 |
| 2016 | 21.7°C | 17.8°C | 13.9°C | 27.2°C | 9.8°C | 33 mm | 81% | 3.7 m/s | 4.7 |
| 2015 | 20.2°C | 16.7°C | 13.1°C | 24.8°C | 10.2°C | 116 mm | 83% | 3.4 m/s | 3.7 |
| 2014 | 19.5°C | 15.9°C | 12.4°C | 23.3°C | 7.9°C | 90 mm | 80% | 3.8 m/s | 4.1 |
| 2013 | 20.9°C | 17.0°C | 13.1°C | 26.1°C | 9.9°C | 57 mm | 82% | 3.3 m/s | 4.5 |
| 2012 | 20.5°C | 17.1°C | 13.7°C | 25.7°C | 7.1°C | 41 mm | 83% | 3.6 m/s | 4.1 |
| 2011 | 20.1°C | 16.3°C | 12.5°C | 24.7°C | 8.4°C | 60 mm | 80% | 3.4 m/s | 4 |
| 2010 | 19.8°C | 16.3°C | 12.7°C | 22.5°C | 8.7°C | 92 mm | 81% | 4 m/s | 3.8 |
| 2009 | 21.6°C | 17.8°C | 14.0°C | 26.1°C | 10.7°C | 27 mm | 79% | 3.4 m/s | 4.1 |
| 2008 | 20.0°C | 16.9°C | 13.8°C | 22.7°C | 9.6°C | 71 mm | 83% | 4.4 m/s | 3.6 |
| 2007 | 20.2°C | 16.5°C | 12.7°C | 24.1°C | 10.0°C | 38 mm | 81% | 3.6 m/s | 4.5 |
| 2006 | 20.9°C | 17.0°C | 13.2°C | 26.5°C | 10.6°C | 67 mm | 77% | 3.7 m/s | 4.1 |
| 2005 | 21.1°C | 16.8°C | 12.5°C | 26.2°C | 9.4°C | 62 mm | 79% | 2.9 m/s | 4.6 |
| 2004 🌧️ | 21.2°C | 17.8°C | 14.4°C | 25.8°C | 9.7°C | 124 mm | 83% | 3.5 m/s | 4.2 |
| 2003 | 23.0°C | 18.8°C | 14.5°C | 28.2°C | 8.4°C | 31 mm | 78% | 2.7 m/s | 4.7 |
| 2002 | 21.1°C | 17.5°C | 13.8°C | 25.2°C | 11.7°C | 58 mm | 84% | 2.4 m/s | 4 |
| 2001 | 20.8°C | 17.3°C | 13.8°C | 25.8°C | 10.1°C | 79 mm | 84% | 3.4 m/s | 4.1 |
| 2000 | 20.6°C | 17.0°C | 13.4°C | 23.3°C | 10.2°C | 35 mm | 83% | 3.1 m/s | 4.4 |
| 1999 | 20.5°C | 16.8°C | 13.2°C | 26.0°C | 9.5°C | 107 mm | 82% | 3.1 m/s | 4.1 |
| 1998 | 20.9°C | 16.6°C | 12.3°C | 26.5°C | 8.0°C | 23 mm | 80% | 3.1 m/s | 4.9 |
| 1997 | 23.2°C | 19.3°C | 15.4°C | 26.7°C | 11.5°C | 114 mm | 82% | 3 m/s | 4.1 |
| 1996 | 20.6°C | 16.7°C | 12.7°C | 25.4°C | 9.3°C | 79 mm | 79% | 3.3 m/s | 4.4 |
| 1995 | 23.6°C | 18.9°C | 14.2°C | 28.2°C | 10.3°C | 6 mm | 76% | 3.5 m/s | 5.2 |
| 1994 | 20.3°C | 16.7°C | 13.1°C | 24.7°C | 9.4°C | 55 mm | 81% | 3.5 m/s | 4.3 |
| 1993 | 19.6°C | 15.5°C | 11.3°C | 23.2°C | 7.5°C | 36 mm | 79% | 3.5 m/s | 4.5 |
| 1992 | 20.1°C | 16.7°C | 13.2°C | 25.9°C | 10.3°C | 101 mm | 81% | 4.4 m/s | 4 |
| 1991 | 22.0°C | 17.7°C | 13.3°C | 25.1°C | 9.6°C | 16 mm | 79% | 3 m/s | 4.7 |
| 1990 | 23.7°C | 19.0°C | 14.3°C | 31.8°C | 10.5°C | 32 mm | 73% | 3.2 m/s | 4.6 |
| 1989 | 22.3°C | 17.7°C | 13.1°C | 25.5°C | 9.6°C | 35 mm | 74% | 3.5 m/s | 4.8 |
| 1988 | 19.6°C | 15.7°C | 11.8°C | 23.9°C | 8.6°C | 32 mm | 82% | 3.6 m/s | 4.2 |
| 1987 | 19.9°C | 16.2°C | 12.4°C | 26.2°C | 9.2°C | 58 mm | 81% | 2.9 m/s | 3.8 |
| 1986 ❄️ | 18.4°C | 14.7°C | 11.0°C | 22.1°C | 6.8°C | 81 mm | 80% | 3.5 m/s | 3.6 |
| 1985 | 18.5°C | 15.1°C | 11.7°C | 22.1°C | 9.2°C | 72 mm | 83% | 4.5 m/s | 3.9 |
| 1984 | 21.4°C | 17.3°C | 13.3°C | 24.8°C | 9.2°C | 34 mm | 81% | 2.8 m/s | 4.6 |
| 1983 | 21.4°C | 17.4°C | 13.3°C | 25.2°C | 9.0°C | 23 mm | 81% | 3.3 m/s | — |
| 1982 | 20.1°C | 16.5°C | 12.9°C | 23.5°C | 8.7°C | 52 mm | 81% | 3.7 m/s | — |
| 1981 | 21.2°C | 17.1°C | 13.0°C | 25.2°C | 9.5°C | 24 mm | 81% | 2.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 21.1°C with lows near 13.3°C (mean 17.2°C), based on 45 years of NASA POWER data.
August averages 57 mm of rainfall in East Grinstead, about average for rainfall. The wettest on record was 124 mm in 2004.
The hottest August reached 31.8°C in 1990. The coldest dipped to 6.8°C in 1986.
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 20.5°C to 22.2°C and overnight lows from 12.8°C to 14.1°C over the same span.
August is one of the warmer months of the year in East Grinstead and about average for rainfall, so plan for around 21.1°C daytime highs and 13.3°C at night.
Not quite — August is the 12th coolest month in East Grinstead, averaging 17.2°C.
For August in East Grinstead, pack light layers you can adjust through the day, with typical highs of 21.1°C and lows of 13.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 80% — quite humid.
Average wind speed in August is 3.4 m/s. The windiest August on record averaged 4.5 m/s (1985).
The wettest August on record was 2004 with 124 mm. On average, August sees 57 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 East Grinstead 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.
