August is one of the warmer months of the year in Dumfries, with average highs near 17°C and lows around 11°C (mean 14°C). It is about average for rainfall, averaging 113 mm of rainfall and 86% relative humidity across the period.
August is one of the warmer months of the year in Dumfries. Across 45 years of records, the warmest August in Dumfries was 1995 — when the month averaged 16.1°C — while the coldest was 1986 at 11.5°C. Typical August days reach 17°C with nights near 11°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Dumfries, averaging 113 mm of rainfall. The wettest August on record was 2004 with 231 mm, while the driest was 1995 at 22 mm.
Relative humidity in Dumfries during August averages 86%. The most humid August was 2008 at 90%, and the least humid was 1984 at 82%.
August receives about 3.7 kWh/m²/day of solar energy in Dumfries. The sunniest August was 1995 at 4.6 kWh/m²/day, and the cloudiest was 2008 at 3.
Average wind speed in Dumfries during August is 3.6 m/s. The windiest August was 1985 at 5.2 m/s, while the calmest was 1983 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.4°C | 14.0°C | 14.2°C | 13.7°C | 14.8°C | +1.4°C |
| Avg High | 16.4°C | 17.2°C | 17.2°C | 16.5°C | 18.0°C | +1.6°C |
| Avg Low | 10.4°C | 10.9°C | 11.3°C | 10.9°C | 11.7°C | +1.3°C |
| Avg Rain | 109 mm | 87 mm | 127 mm | 129 mm | 109 mm | -1 mm |
August temperatures in Dumfries have risen by about 0.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.6°C (1993) to a record high of 25°C (1995).
Rainfall in August is about average for rainfall, averaging 113 mm, with a wettest year of 231 mm.
One of the best times to visit Dumfries
August is one of the best times to visit Dumfries. Expect days averaging 17°C and nights around 11°C (mean 14°C) — warmer than Dumfries's yearly average — with higher rainfall (113 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 | 18.6°C | 15.4°C | 12.2°C | 23.3°C | 8.9°C | 72 mm | 84% | 3.8 m/s | 4.2 |
| 2024 | 16.9°C | 14.1°C | 11.4°C | 20.2°C | 8.2°C | 178 mm | 87% | 4.8 m/s | 3.6 |
| 2023 | 17.5°C | 14.6°C | 11.7°C | 22.4°C | 8.6°C | 89 mm | 87% | 3.7 m/s | 3.8 |
| 2022 | 19.0°C | 15.3°C | 11.7°C | 25.0°C | 8.3°C | 67 mm | 84% | 3 m/s | 4.3 |
| 2021 | 17.8°C | 14.6°C | 11.5°C | 22.5°C | 8.2°C | 91 mm | 86% | 3 m/s | 3.7 |
| 2020 | 18.0°C | 14.7°C | 11.5°C | 24.7°C | 6.5°C | 156 mm | 87% | 3.6 m/s | 3.5 |
| 2019 | 17.5°C | 15.0°C | 12.4°C | 22.8°C | 8.8°C | 165 mm | 88% | 4.2 m/s | 3.8 |
| 2018 | 16.7°C | 14.0°C | 11.3°C | 20.4°C | 7.5°C | 125 mm | 87% | 3.5 m/s | 3.6 |
| 2017 | 15.9°C | 13.3°C | 10.6°C | 18.7°C | 7.2°C | 144 mm | 88% | 3.8 m/s | 3.7 |
| 2016 | 17.0°C | 14.2°C | 11.4°C | 20.2°C | 8.0°C | 114 mm | 88% | 3.9 m/s | 3.8 |
| 2015 | 16.4°C | 13.6°C | 10.7°C | 20.9°C | 8.0°C | 111 mm | 86% | 3.7 m/s | 3.9 |
| 2014 | 15.5°C | 12.7°C | 9.9°C | 18.6°C | 6.1°C | 128 mm | 86% | 4.2 m/s | 3.8 |
| 2013 | 17.1°C | 14.1°C | 11.2°C | 20.2°C | 8.1°C | 104 mm | 87% | 3.6 m/s | 3.7 |
| 2012 | 16.8°C | 14.0°C | 11.3°C | 20.3°C | 6.4°C | 172 mm | 89% | 3.4 m/s | 3.8 |
| 2011 | 15.6°C | 13.0°C | 10.3°C | 18.6°C | 7.8°C | 144 mm | 87% | 3.3 m/s | 3.1 |
| 2010 | 16.4°C | 13.2°C | 10.0°C | 19.7°C | 5.8°C | 88 mm | 86% | 3.5 m/s | 3.9 |
| 2009 | 16.6°C | 14.3°C | 11.9°C | 19.3°C | 9.4°C | 216 mm | 88% | 4.7 m/s | 3.5 |
| 2008 | 16.6°C | 14.2°C | 11.8°C | 18.9°C | 8.8°C | 187 mm | 90% | 3.7 m/s | 3 |
| 2007 | 16.4°C | 13.4°C | 10.5°C | 19.3°C | 8.2°C | 109 mm | 88% | 3.7 m/s | 3.7 |
| 2006 | 16.9°C | 14.0°C | 11.1°C | 21.1°C | 9.8°C | 96 mm | 86% | 3.5 m/s | 3.8 |
| 2005 | 17.0°C | 13.8°C | 10.5°C | 20.4°C | 7.6°C | 87 mm | 87% | 3.6 m/s | 4 |
| 2004 🌧️ | 17.9°C | 15.1°C | 12.3°C | 22.6°C | 7.8°C | 231 mm | 88% | 3.3 m/s | 3.5 |
| 2003 | 18.6°C | 15.1°C | 11.7°C | 24.7°C | 7.2°C | 27 mm | 85% | 2.8 m/s | 4.1 |
| 2002 | 17.7°C | 14.5°C | 11.4°C | 21.3°C | 8.8°C | 103 mm | 88% | 2.9 m/s | 3.5 |
| 2001 | 16.8°C | 13.9°C | 11.0°C | 19.6°C | 8.2°C | 106 mm | 87% | 3.1 m/s | 3.3 |
| 2000 | 17.1°C | 14.1°C | 11.0°C | 22.0°C | 7.5°C | 110 mm | 87% | 2.9 m/s | 3.6 |
| 1999 | 17.0°C | 13.8°C | 10.6°C | 22.7°C | 6.1°C | 80 mm | 85% | 3.5 m/s | 3.8 |
| 1998 | 16.4°C | 13.6°C | 10.8°C | 20.6°C | 6.9°C | 97 mm | 88% | 4.1 m/s | 3.8 |
| 1997 | 19.3°C | 15.8°C | 12.3°C | 23.9°C | 9.3°C | 70 mm | 86% | 3.2 m/s | 4 |
| 1996 | 17.2°C | 14.1°C | 11.1°C | 20.7°C | 8.6°C | 83 mm | 86% | 3.1 m/s | 3.9 |
| 1995 🔥 | 20.1°C | 16.1°C | 12.1°C | 25.0°C | 7.8°C | 22 mm | 82% | 2.9 m/s | 4.6 |
| 1994 | 15.9°C | 13.0°C | 10.0°C | 19.8°C | 6.7°C | 107 mm | 86% | 3.5 m/s | 3.8 |
| 1993 | 15.4°C | 12.2°C | 9.0°C | 20.2°C | 5.6°C | 65 mm | 86% | 3.3 m/s | 3.8 |
| 1992 | 15.2°C | 12.6°C | 10.0°C | 17.5°C | 6.6°C | 162 mm | 86% | 4.6 m/s | 3.8 |
| 1991 | 17.5°C | 14.5°C | 11.5°C | 22.3°C | 8.4°C | 77 mm | 87% | 3.5 m/s | 3.8 |
| 1990 | 17.6°C | 14.7°C | 11.8°C | 24.1°C | 7.5°C | 109 mm | 86% | 4 m/s | 3.6 |
| 1989 | 16.3°C | 13.5°C | 10.7°C | 18.9°C | 6.9°C | 131 mm | 86% | 4.6 m/s | 3.6 |
| 1988 | 15.5°C | 12.9°C | 10.4°C | 21.5°C | 7.1°C | 142 mm | 86% | 4.5 m/s | 3.8 |
| 1987 | 15.9°C | 13.1°C | 10.3°C | 19.7°C | 6.6°C | 115 mm | 87% | 3.5 m/s | 3.7 |
| 1986 ❄️ | 14.5°C | 11.5°C | 8.6°C | 17.9°C | 5.9°C | 125 mm | 83% | 3.8 m/s | 3.3 |
| 1985 | 14.3°C | 12.1°C | 9.9°C | 17.2°C | 7.8°C | 223 mm | 89% | 5.2 m/s | 3.3 |
| 1984 | 19.0°C | 15.3°C | 11.7°C | 23.5°C | 8.2°C | 57 mm | 82% | 2.9 m/s | 3.9 |
| 1983 | 18.6°C | 14.9°C | 11.3°C | 22.0°C | 8.0°C | 33 mm | 83% | 2.6 m/s | — |
| 1982 | 16.4°C | 13.5°C | 10.6°C | 23.3°C | 5.8°C | 115 mm | 86% | 4.4 m/s | — |
| 1981 | 17.1°C | 13.7°C | 10.4°C | 21.4°C | 7.0°C | 43 mm | 87% | 3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 17°C with lows near 11°C (mean 14°C), based on 45 years of NASA POWER data.
August averages 113 mm of rainfall in Dumfries, about average for rainfall. The wettest on record was 231 mm in 2004.
The hottest August reached 25°C in 1995. The coldest dipped to 5.6°C in 1993.
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 17.1°C to 18°C and overnight lows from 10.8°C to 11.7°C over the same span.
August is one of the warmer months of the year in Dumfries and about average for rainfall, so plan for around 17°C daytime highs and 11°C at night.
Not quite — August is the 11th coolest month in Dumfries, averaging 14°C.
For August in Dumfries, pack light layers you can adjust through the day, with typical highs of 17°C and lows of 11°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 86% — quite humid.
Average wind speed in August is 3.6 m/s. The windiest August on record averaged 5.2 m/s (1985).
The wettest August on record was 2004 with 231 mm. On average, August sees 113 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 Dumfries 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.
