August is one of the warmer months of the year in Dover, with average highs near 19.4°C and lows around 15.6°C (mean 17.5°C). It is about average for rainfall, averaging 55 mm of rainfall and 82% 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 2022 — when the month averaged 19.9°C — while the coldest was 1986 at 15.2°C. Typical August days reach 19.4°C with nights near 15.6°C. The long-term trend is warming, about 0.3°C per decade.
August is about average for rainfall in Dover, averaging 55 mm of rainfall. The wettest August on record was 2015 with 107 mm, while the driest were 1991 and 1995 at 13 mm.
Relative humidity in Dover during August averages 82%. The most humid Augusts were 2000 and 2004 at 85%, and the least humid was 1990 at 78%.
August receives about 4.3 kWh/m²/day of solar energy in Dover. The sunniest August was 2022 at 5 kWh/m²/day, and the cloudiest were 1986 and 1987 at 3.6.
Average wind speed in Dover during August is 4.5 m/s. The windiest August was 2008 at 5.9 m/s, while the calmest was 2002 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.7°C | 17.5°C | 17.6°C | 17.4°C | 18.6°C | +1.9°C |
| Avg High | 18.6°C | 19.6°C | 19.5°C | 19.3°C | 20.4°C | +1.8°C |
| Avg Low | 14.8°C | 15.5°C | 15.8°C | 15.6°C | 16.7°C | +1.9°C |
| Avg Rain | 45 mm | 51 mm | 59 mm | 70 mm | 47 mm | +2 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 10.9°C (1986) to a record high of 27.9°C (2003).
Rainfall in August is about average for rainfall, averaging 55 mm, with a wettest year of 107 mm.
One of the best times to visit Dover
August is one of the best times to visit Dover. Expect days averaging 19.4°C and nights around 15.6°C (mean 17.5°C) — warmer than Dover's yearly average — with moderate rainfall (55 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 | 20.5°C | 18.6°C | 16.7°C | 24.8°C | 14.8°C | 19 mm | 79% | 4.8 m/s | 4.5 |
| 2024 | 20.7°C | 18.7°C | 16.7°C | 24.4°C | 14.6°C | 46 mm | 83% | 4.8 m/s | 4.6 |
| 2023 | 19.7°C | 17.9°C | 16.0°C | 22.1°C | 13.4°C | 78 mm | 83% | 4.5 m/s | 4.5 |
| 2022 🔥 | 21.8°C | 19.9°C | 18.0°C | 25.7°C | 16.1°C | 21 mm | 79% | 4 m/s | 5 |
| 2021 | 18.7°C | 17.2°C | 15.7°C | 20.0°C | 14.5°C | 52 mm | 84% | 5.2 m/s | 4 |
| 2020 | 21.1°C | 19.1°C | 17.1°C | 27.0°C | 13.5°C | 66 mm | 80% | 4.6 m/s | 4.3 |
| 2019 | 20.1°C | 18.2°C | 16.2°C | 25.5°C | 13.6°C | 43 mm | 80% | 4.9 m/s | 4.7 |
| 2018 | 19.9°C | 18.0°C | 16.1°C | 25.2°C | 12.1°C | 72 mm | 80% | 4.4 m/s | 4.2 |
| 2017 | 19.4°C | 17.5°C | 15.5°C | 24.1°C | 13.1°C | 90 mm | 81% | 4.3 m/s | 4.3 |
| 2016 | 20.0°C | 18.1°C | 16.1°C | 23.9°C | 12.6°C | 30 mm | 82% | 4.9 m/s | 4.8 |
| 2015 🌧️ | 19.2°C | 17.4°C | 15.6°C | 23.5°C | 13.8°C | 107 mm | 83% | 4.3 m/s | 4.1 |
| 2014 | 18.5°C | 16.8°C | 15.1°C | 21.6°C | 12.5°C | 102 mm | 80% | 5.1 m/s | 4.4 |
| 2013 | 19.4°C | 17.5°C | 15.6°C | 24.0°C | 13.3°C | 53 mm | 84% | 4.2 m/s | 4.6 |
| 2012 | 19.1°C | 17.4°C | 15.6°C | 22.8°C | 11.8°C | 32 mm | 84% | 4.6 m/s | 4.4 |
| 2011 | 18.5°C | 16.7°C | 14.9°C | 21.4°C | 12.6°C | 78 mm | 82% | 4.8 m/s | 4 |
| 2010 | 18.4°C | 16.8°C | 15.1°C | 20.2°C | 11.9°C | 93 mm | 83% | 5.4 m/s | 3.8 |
| 2009 | 19.9°C | 18.0°C | 16.1°C | 24.0°C | 13.6°C | 18 mm | 81% | 4.5 m/s | 4.5 |
| 2008 | 18.7°C | 17.2°C | 15.7°C | 21.5°C | 13.1°C | 69 mm | 84% | 5.9 m/s | 3.8 |
| 2007 | 18.8°C | 17.0°C | 15.2°C | 22.7°C | 13.8°C | 47 mm | 82% | 4.8 m/s | 4.2 |
| 2006 | 19.0°C | 17.2°C | 15.4°C | 21.8°C | 13.6°C | 102 mm | 81% | 5 m/s | 3.8 |
| 2005 | 19.1°C | 17.0°C | 14.9°C | 24.4°C | 13.2°C | 63 mm | 82% | 4 m/s | 4.3 |
| 2004 | 19.6°C | 17.9°C | 16.2°C | 23.8°C | 13.3°C | 103 mm | 85% | 4.4 m/s | 4.3 |
| 2003 | 21.0°C | 18.9°C | 16.8°C | 27.9°C | 13.5°C | 37 mm | 80% | 3.6 m/s | 4.8 |
| 2002 | 19.6°C | 17.8°C | 16.0°C | 24.1°C | 14.8°C | 47 mm | 84% | 3.1 m/s | 4.3 |
| 2001 | 19.6°C | 17.7°C | 15.9°C | 24.4°C | 13.2°C | 72 mm | 84% | 4.6 m/s | 4.5 |
| 2000 | 19.2°C | 17.3°C | 15.5°C | 21.4°C | 14.1°C | 35 mm | 85% | 3.9 m/s | 4.5 |
| 1999 | 19.4°C | 17.5°C | 15.6°C | 25.3°C | 13.2°C | 97 mm | 82% | 4.1 m/s | 4.2 |
| 1998 | 19.1°C | 16.9°C | 14.7°C | 24.3°C | 12.0°C | 25 mm | 82% | 4.4 m/s | 4.7 |
| 1997 | 21.3°C | 19.1°C | 16.9°C | 24.2°C | 14.8°C | 48 mm | 84% | 3.6 m/s | 4.6 |
| 1996 | 18.7°C | 16.7°C | 14.8°C | 22.8°C | 12.7°C | 98 mm | 82% | 4.3 m/s | 4.3 |
| 1995 | 20.8°C | 18.7°C | 16.6°C | 26.0°C | 13.0°C | 13 mm | 81% | 4.7 m/s | 4.9 |
| 1994 | 19.2°C | 17.4°C | 15.6°C | 23.7°C | 13.4°C | 66 mm | 81% | 4.6 m/s | 4.3 |
| 1993 | 18.0°C | 16.0°C | 14.0°C | 20.4°C | 12.0°C | 31 mm | 81% | 4.8 m/s | 4.4 |
| 1992 | 18.7°C | 17.0°C | 15.3°C | 22.3°C | 12.8°C | 94 mm | 84% | 5.7 m/s | 4 |
| 1991 | 19.5°C | 17.3°C | 15.1°C | 21.8°C | 13.1°C | 13 mm | 84% | 3.8 m/s | 4.8 |
| 1990 | 20.9°C | 18.5°C | 16.1°C | 27.6°C | 13.4°C | 26 mm | 78% | 3.9 m/s | 4.7 |
| 1989 | 19.9°C | 17.8°C | 15.6°C | 22.8°C | 12.7°C | 25 mm | 79% | 4.5 m/s | 4.5 |
| 1988 | 18.0°C | 16.1°C | 14.2°C | 20.6°C | 12.5°C | 35 mm | 84% | 4.7 m/s | 4.4 |
| 1987 | 18.3°C | 16.5°C | 14.6°C | 22.3°C | 12.3°C | 80 mm | 82% | 3.9 m/s | 3.6 |
| 1986 ❄️ | 17.0°C | 15.2°C | 13.4°C | 19.8°C | 10.9°C | 70 mm | 80% | 4.8 m/s | 3.6 |
| 1985 | 17.5°C | 15.6°C | 13.8°C | 19.9°C | 11.9°C | 55 mm | 84% | 5.8 m/s | 4 |
| 1984 | 19.2°C | 17.2°C | 15.2°C | 22.4°C | 13.2°C | 31 mm | 84% | 3.6 m/s | 4.4 |
| 1983 | 19.4°C | 17.5°C | 15.7°C | 22.6°C | 13.3°C | 36 mm | 84% | 4.5 m/s | — |
| 1982 | 18.9°C | 17.0°C | 15.1°C | 23.0°C | 12.3°C | 50 mm | 81% | 4.8 m/s | — |
| 1981 | 19.1°C | 17.2°C | 15.2°C | 22.2°C | 12.8°C | 21 mm | 82% | 3.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 19.4°C with lows near 15.6°C (mean 17.5°C), based on 45 years of NASA POWER data.
August averages 55 mm of rainfall in Dover, about average for rainfall. The wettest on record was 107 mm in 2015.
The hottest August reached 27.9°C in 2003. The coldest dipped to 10.9°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 18.8°C to 20.3°C and overnight lows from 15°C to 16.6°C over the same span.
August is one of the warmer months of the year in Dover and about average for rainfall, so plan for around 19.4°C daytime highs and 15.6°C at night.
Not quite — August is the 12th coolest month in Dover, averaging 17.5°C.
For August in Dover, pack light layers you can adjust through the day, with typical highs of 19.4°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 82% — quite humid.
Average wind speed in August is 4.5 m/s. The windiest August on record averaged 5.9 m/s (2008).
The wettest August on record was 2015 with 107 mm. On average, August sees 55 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.
