August is one of the warmer months of the year in Dover, with average highs near 29.7°C and lows around 19.9°C (mean 24.8°C). It is a relatively wet time of year, averaging 106 mm of rainfall and 73% relative humidity across the period.
August is one of the warmer months of the year in Dover. Across 45 years of records, the warmest August in Dover was 2002 — when the month averaged 27.1°C — while the coldest was 1992 at 22.5°C. Typical August days reach 29.7°C with nights near 19.9°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Dover, averaging 106 mm of rainfall. The wettest August on record was 2011 with 300 mm, while the driest was 2006 at 28 mm.
Relative humidity in Dover during August averages 73%. The most humid August was 2003 at 86%, and the least humid was 2002 at 60%.
August receives about 5.4 kWh/m²/day of solar energy in Dover. The sunniest Augusts were 2016 and 2022 at 6.1 kWh/m²/day, and the cloudiest were 1989, 1990 and 2000 at 4.8.
Average wind speed in Dover during August is 2.3 m/s. The windiest Augusts were 1986, 1995 and 2011 at 2.7 m/s, while the calmest was 1996 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.3°C | 24.3°C | 25.1°C | 25.0°C | 25.6°C | +1.3°C |
| Avg High | 29.3°C | 29.4°C | 29.8°C | 29.8°C | 30.4°C | +1.1°C |
| Avg Low | 19.2°C | 19.2°C | 20.4°C | 20.3°C | 20.8°C | +1.6°C |
| Avg Rain | 94 mm | 109 mm | 101 mm | 124 mm | 94 mm | +0 mm |
August temperatures in Dover have risen by about 1.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 9.5°C (1986) to a record high of 38.4°C (2002).
Rainfall in August is a relatively wet time of year, averaging 106 mm, with a wettest year of 300 mm.
One of the best times to visit Dover
August is one of the best times to visit Dover. Expect days averaging 29.7°C and nights around 19.9°C (mean 24.8°C) — warmer than Dover's yearly average — with higher rainfall (106 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 | 29.2°C | 23.9°C | 18.7°C | 34.5°C | 12.5°C | 43 mm | 69% | 2.4 m/s | 5.4 |
| 2024 | 30.8°C | 25.6°C | 20.4°C | 36.4°C | 14.1°C | 78 mm | 72% | 2.4 m/s | 5.4 |
| 2023 | 29.8°C | 25.1°C | 20.4°C | 33.5°C | 16.6°C | 67 mm | 73% | 2.5 m/s | 5.3 |
| 2022 | 32.4°C | 27.0°C | 21.6°C | 36.6°C | 17.4°C | 64 mm | 68% | 2.2 m/s | 6.1 |
| 2021 | 31.2°C | 26.6°C | 22.0°C | 35.8°C | 17.9°C | 120 mm | 76% | 2.1 m/s | 5 |
| 2020 | 29.1°C | 25.2°C | 21.4°C | 32.4°C | 17.7°C | 191 mm | 81% | 2.3 m/s | 5.2 |
| 2019 | 31.0°C | 26.0°C | 20.9°C | 35.6°C | 16.8°C | 86 mm | 71% | 2.1 m/s | 5.5 |
| 2018 | 30.3°C | 26.0°C | 21.8°C | 35.4°C | 16.5°C | 106 mm | 78% | 2.3 m/s | 5.6 |
| 2017 | 27.1°C | 23.2°C | 19.3°C | 30.5°C | 15.7°C | 167 mm | 79% | 2.1 m/s | 5.4 |
| 2016 | 32.1°C | 27.0°C | 21.8°C | 35.7°C | 16.5°C | 69 mm | 70% | 2.2 m/s | 6.1 |
| 2015 | 30.6°C | 25.1°C | 19.6°C | 33.8°C | 15.5°C | 66 mm | 67% | 2.2 m/s | 5.9 |
| 2014 | 28.1°C | 23.3°C | 18.4°C | 32.3°C | 14.4°C | 121 mm | 74% | 2.1 m/s | 5.5 |
| 2013 | 26.9°C | 22.9°C | 18.9°C | 31.3°C | 14.0°C | 109 mm | 80% | 2.2 m/s | 5 |
| 2012 | 30.2°C | 25.8°C | 21.3°C | 34.8°C | 18.5°C | 114 mm | 73% | 2.1 m/s | 5.3 |
| 2011 🌧️ | 30.1°C | 25.3°C | 20.4°C | 35.1°C | 14.9°C | 300 mm | 71% | 2.7 m/s | 5.2 |
| 2010 | 31.1°C | 25.8°C | 20.6°C | 36.8°C | 16.2°C | 104 mm | 70% | 2.3 m/s | 5.3 |
| 2009 | 29.2°C | 25.2°C | 21.2°C | 33.2°C | 17.0°C | 186 mm | 79% | 1.9 m/s | 5.3 |
| 2008 | 29.9°C | 24.4°C | 18.9°C | 33.3°C | 16.0°C | 33 mm | 67% | 2.2 m/s | 5.9 |
| 2007 | 31.8°C | 26.3°C | 20.8°C | 36.9°C | 16.8°C | 83 mm | 69% | 2.2 m/s | 5.2 |
| 2006 | 31.5°C | 26.3°C | 21.1°C | 36.3°C | 15.1°C | 28 mm | 68% | 2.3 m/s | 5.6 |
| 2005 | 31.3°C | 26.5°C | 21.7°C | 35.8°C | 16.5°C | 69 mm | 73% | 2.1 m/s | 5.2 |
| 2004 | 27.7°C | 23.4°C | 19.2°C | 31.3°C | 13.3°C | 149 mm | 81% | 2.4 m/s | 5.1 |
| 2003 | 27.7°C | 24.0°C | 20.4°C | 30.7°C | 14.0°C | 132 mm | 86% | 2.1 m/s | 5.1 |
| 2002 🔥 | 32.6°C | 27.1°C | 21.6°C | 38.4°C | 16.3°C | 74 mm | 60% | 2.5 m/s | 5.4 |
| 2001 | 30.0°C | 25.2°C | 20.4°C | 36.1°C | 16.6°C | 147 mm | 75% | 2.2 m/s | 5.4 |
| 2000 | 26.7°C | 22.8°C | 18.9°C | 31.2°C | 12.0°C | 110 mm | 80% | 2.5 m/s | 4.8 |
| 1999 | 30.8°C | 25.6°C | 20.4°C | 35.5°C | 15.5°C | 115 mm | 65% | 2.6 m/s | 5.3 |
| 1998 | 31.0°C | 25.5°C | 20.0°C | 36.0°C | 13.7°C | 76 mm | 68% | 2.5 m/s | 5.7 |
| 1997 | 29.5°C | 24.1°C | 18.6°C | 36.1°C | 14.3°C | 131 mm | 67% | 2.2 m/s | 5.4 |
| 1996 | 27.2°C | 22.7°C | 18.2°C | 30.8°C | 16.3°C | 100 mm | 80% | 1.8 m/s | 5.5 |
| 1995 | 31.5°C | 25.6°C | 19.7°C | 36.5°C | 15.2°C | 43 mm | 64% | 2.7 m/s | 5.7 |
| 1994 | 27.7°C | 22.7°C | 17.8°C | 32.1°C | 12.8°C | 125 mm | 77% | 2.3 m/s | 5.2 |
| 1993 | 30.9°C | 25.4°C | 19.9°C | 35.1°C | 15.6°C | 93 mm | 69% | 2 m/s | 5.5 |
| 1992 ❄️ | 27.3°C | 22.5°C | 17.7°C | 32.5°C | 12.9°C | 137 mm | 75% | 2.3 m/s | 5.5 |
| 1991 | 30.4°C | 25.3°C | 20.3°C | 35.6°C | 17.1°C | 106 mm | 70% | 2.3 m/s | 5.6 |
| 1990 | 28.2°C | 23.9°C | 19.6°C | 31.9°C | 16.1°C | 159 mm | 78% | 2.1 m/s | 4.8 |
| 1989 | 26.6°C | 23.0°C | 19.3°C | 30.2°C | 12.6°C | 119 mm | 84% | 2.2 m/s | 4.8 |
| 1988 | 31.0°C | 25.8°C | 20.6°C | 35.9°C | 13.7°C | 98 mm | 69% | 2.5 m/s | 5.3 |
| 1987 | 31.4°C | 25.6°C | 19.8°C | 36.4°C | 14.3°C | 40 mm | 64% | 2.5 m/s | 5.3 |
| 1986 | 29.2°C | 24.1°C | 19.0°C | 34.6°C | 9.5°C | 129 mm | 68% | 2.7 m/s | 5.4 |
| 1985 | 28.3°C | 23.8°C | 19.3°C | 35.8°C | 15.1°C | 149 mm | 74% | 2.2 m/s | 5.4 |
| 1984 | 28.3°C | 23.8°C | 19.3°C | 30.3°C | 12.0°C | 74 mm | 78% | 2 m/s | 6 |
| 1983 | 31.4°C | 25.6°C | 19.8°C | 37.7°C | 13.7°C | 92 mm | 67% | 2.2 m/s | — |
| 1982 | 28.7°C | 23.2°C | 17.8°C | 32.1°C | 10.0°C | 59 mm | 68% | 2.3 m/s | — |
| 1981 | 29.0°C | 23.5°C | 18.0°C | 33.1°C | 12.0°C | 83 mm | 69% | 2.2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 29.7°C with lows near 19.9°C (mean 24.8°C), based on 45 years of NASA POWER data.
August averages 106 mm of rainfall in Dover, a relatively wet time of year. The wettest on record was 300 mm in 2011.
The hottest August reached 38.4°C in 2002. The coldest dipped to 9.5°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.6°C. Daytime highs moved from 29.1°C to 30.7°C and overnight lows from 18.8°C to 20.6°C over the same span.
August is one of the warmer months of the year in Dover and a relatively wet time of year, so plan for around 29.7°C daytime highs and 19.9°C at night.
Not quite — August is the 11th coolest month in Dover, averaging 24.8°C.
For August in Dover, pack light layers you can adjust through the day, with typical highs of 29.7°C and lows of 19.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 73% — moderately humid.
Average wind speed in August is 2.3 m/s. The windiest August on record averaged 2.7 m/s (1986).
The wettest August on record was 2011 with 300 mm. On average, August sees 106 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 Dover 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.
