August is one of the warmer months of the year in Lac-Brome, with average highs near 23.1°C and lows around 13.6°C (mean 18.4°C). It is a relatively wet time of year, averaging 112 mm of rainfall and 82% relative humidity across the period.
August is one of the warmer months of the year in Lac-Brome. Across 45 years of records, the warmest August in Lac-Brome was 2021 — when the month averaged 21.1°C — while the coldest was 1982 at 15.7°C. Typical August days reach 23.1°C with nights near 13.6°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Lac-Brome, averaging 112 mm of rainfall. The wettest August on record was 2011 with 197 mm, while the driest was 2002 at 38 mm.
Relative humidity in Lac-Brome during August averages 82%. The most humid August was 2004 at 85%, and the least humid was 1987 at 78%.
August receives about 5 kWh/m²/day of solar energy in Lac-Brome. The sunniest August was 2002 at 5.6 kWh/m²/day, and the cloudiest was 1988 at 4.4.
Average wind speed in Lac-Brome during August is 0.3 m/s. The windiest Augusts were 2023, 2024 and 2025, among others at 0.3 m/s, while the calmest were 2019, 2021 and 2022, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.4°C | 18.0°C | 18.5°C | 18.9°C | 19.1°C | +1.7°C |
| Avg High | 22.3°C | 22.9°C | 23.2°C | 23.6°C | 23.9°C | +1.6°C |
| Avg Low | 12.5°C | 13.2°C | 13.8°C | 14.3°C | 14.3°C | +1.8°C |
| Avg Rain | 118 mm | 115 mm | 115 mm | 107 mm | 105 mm | -13 mm |
August temperatures in Lac-Brome have risen by about 1.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 3.2°C (1982) to a record high of 30.4°C (2022).
Rainfall in August is a relatively wet time of year, averaging 112 mm, with a wettest year of 197 mm.
One of the best times to visit Lac-Brome
August is one of the best times to visit Lac-Brome. Expect days averaging 23.1°C and nights around 13.6°C (mean 18.4°C) — warmer than Lac-Brome's yearly average — with higher rainfall (112 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 | 23.5°C | 18.2°C | 12.9°C | 29.0°C | 6.5°C | 80 mm | 79% | 0.3 m/s | 5.4 |
| 2024 | 23.4°C | 18.7°C | 14.1°C | 30.4°C | 7.8°C | 136 mm | 83% | 0.3 m/s | 4.5 |
| 2023 | 22.3°C | 17.8°C | 13.4°C | 26.3°C | 8.9°C | 123 mm | 84% | 0.3 m/s | 4.6 |
| 2022 | 24.8°C | 19.9°C | 15.0°C | 30.4°C | 9.7°C | 94 mm | 80% | 0.2 m/s | 4.9 |
| 2021 🔥 | 26.0°C | 21.1°C | 16.2°C | 30.2°C | 10.9°C | 78 mm | 80% | 0.2 m/s | 4.9 |
| 2020 | 23.2°C | 18.7°C | 14.2°C | 29.0°C | 8.5°C | 116 mm | 81% | 0.3 m/s | 5.1 |
| 2019 | 23.5°C | 18.6°C | 13.7°C | 26.7°C | 9.6°C | 109 mm | 81% | 0.2 m/s | 5.4 |
| 2018 | 25.3°C | 20.6°C | 15.9°C | 29.7°C | 9.0°C | 81 mm | 83% | 0.2 m/s | 4.9 |
| 2017 | 22.5°C | 17.9°C | 13.2°C | 26.9°C | 8.4°C | 101 mm | 81% | 0.3 m/s | 5.3 |
| 2016 | 24.9°C | 20.1°C | 15.4°C | 29.0°C | 9.9°C | 135 mm | 81% | 0.3 m/s | 5.1 |
| 2015 | 23.7°C | 19.2°C | 14.7°C | 28.8°C | 10.9°C | 74 mm | 83% | 0.3 m/s | 5 |
| 2014 | 22.5°C | 18.0°C | 13.6°C | 27.9°C | 9.7°C | 83 mm | 83% | 0.3 m/s | 5.1 |
| 2013 | 22.6°C | 17.9°C | 13.3°C | 26.6°C | 9.6°C | 89 mm | 82% | 0.3 m/s | 5.2 |
| 2012 | 24.7°C | 19.8°C | 14.9°C | 28.7°C | 8.6°C | 71 mm | 80% | 0.3 m/s | 5.1 |
| 2011 🌧️ | 23.1°C | 18.7°C | 14.3°C | 26.7°C | 9.6°C | 197 mm | 84% | 0.3 m/s | 4.8 |
| 2010 | 23.2°C | 18.5°C | 13.8°C | 29.0°C | 9.6°C | 131 mm | 83% | 0.3 m/s | 5.1 |
| 2009 | 23.3°C | 18.8°C | 14.3°C | 28.8°C | 8.1°C | 81 mm | 83% | 0.3 m/s | 5 |
| 2008 | 22.0°C | 17.7°C | 13.4°C | 26.2°C | 8.4°C | 135 mm | 84% | 0.3 m/s | 5 |
| 2007 | 23.0°C | 17.8°C | 12.7°C | 29.0°C | 6.4°C | 113 mm | 81% | 0.3 m/s | 5.2 |
| 2006 | 21.6°C | 17.2°C | 12.8°C | 30.0°C | 6.0°C | 152 mm | 82% | 0.3 m/s | 5.2 |
| 2005 | 24.1°C | 19.3°C | 14.5°C | 27.8°C | 8.1°C | 118 mm | 82% | 0.3 m/s | 5 |
| 2004 | 22.5°C | 18.0°C | 13.5°C | 26.9°C | 7.8°C | 188 mm | 85% | 0.3 m/s | 4.6 |
| 2003 | 24.1°C | 19.6°C | 15.1°C | 29.9°C | 6.8°C | 116 mm | 83% | 0.3 m/s | 4.6 |
| 2002 | 24.1°C | 19.2°C | 14.4°C | 29.8°C | 8.7°C | 38 mm | 80% | 0.3 m/s | 5.6 |
| 2001 | 25.0°C | 19.9°C | 14.8°C | 29.8°C | 8.5°C | 95 mm | 78% | 0.3 m/s | 5.3 |
| 2000 | 22.4°C | 17.6°C | 12.8°C | 26.9°C | 7.7°C | 116 mm | 84% | 0.3 m/s | 4.7 |
| 1999 | 22.4°C | 17.7°C | 13.0°C | 27.1°C | 7.5°C | 77 mm | 79% | 0.3 m/s | 5.1 |
| 1998 | 23.4°C | 18.7°C | 14.1°C | 27.6°C | 7.9°C | 117 mm | 82% | 0.3 m/s | 5.1 |
| 1997 | 21.9°C | 17.2°C | 12.5°C | 27.1°C | 8.0°C | 143 mm | 80% | 0.3 m/s | 5 |
| 1996 | 23.3°C | 18.4°C | 13.4°C | 29.5°C | 7.0°C | 59 mm | 81% | 0.3 m/s | 5.3 |
| 1995 | 23.6°C | 18.3°C | 13.0°C | 28.4°C | 6.9°C | 126 mm | 79% | 0.3 m/s | 5.3 |
| 1994 | 21.8°C | 16.9°C | 12.1°C | 26.4°C | 6.4°C | 105 mm | 83% | 0.3 m/s | 5 |
| 1993 | 23.8°C | 19.0°C | 14.1°C | 27.7°C | 8.5°C | 88 mm | 83% | 0.3 m/s | 5.2 |
| 1992 | 21.8°C | 17.1°C | 12.4°C | 27.3°C | 8.2°C | 111 mm | 84% | 0.2 m/s | 4.7 |
| 1991 | 23.4°C | 18.8°C | 14.1°C | 28.6°C | 8.1°C | 169 mm | 83% | 0.3 m/s | 4.9 |
| 1990 | 23.4°C | 18.4°C | 13.4°C | 26.7°C | 7.0°C | 154 mm | 82% | 0.3 m/s | 5.2 |
| 1989 | 22.2°C | 17.3°C | 12.5°C | 28.7°C | 4.2°C | 141 mm | 82% | 0.2 m/s | 5.1 |
| 1988 | 23.4°C | 18.7°C | 14.0°C | 30.0°C | 6.2°C | 160 mm | 83% | 0.3 m/s | 4.4 |
| 1987 | 22.0°C | 16.7°C | 11.4°C | 29.5°C | 6.0°C | 62 mm | 78% | 0.3 m/s | 5 |
| 1986 | 21.5°C | 16.6°C | 11.7°C | 27.0°C | 3.2°C | 135 mm | 83% | 0.3 m/s | 4.8 |
| 1985 | 21.7°C | 16.7°C | 11.7°C | 26.0°C | 5.7°C | 84 mm | 80% | 0.3 m/s | 4.7 |
| 1984 | 24.0°C | 19.3°C | 14.7°C | 28.8°C | 6.9°C | 85 mm | 82% | 0.3 m/s | 5.4 |
| 1983 | 23.1°C | 18.3°C | 13.5°C | 28.5°C | 7.0°C | 123 mm | 80% | 0.3 m/s | — |
| 1982 ❄️ | 20.6°C | 15.7°C | 10.7°C | 29.3°C | 3.2°C | 124 mm | 80% | 0.3 m/s | — |
| 1981 | 22.3°C | 17.5°C | 12.6°C | 25.9°C | 7.4°C | 145 mm | 82% | 0.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 23.1°C with lows near 13.6°C (mean 18.4°C), based on 45 years of NASA POWER data.
August averages 112 mm of rainfall in Lac-Brome, a relatively wet time of year. The wettest on record was 197 mm in 2011.
The hottest August reached 30.4°C in 2022. The coldest dipped to 3.2°C in 1982.
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 22.3°C to 24°C and overnight lows from 12.6°C to 14.3°C over the same span.
August is one of the warmer months of the year in Lac-Brome and a relatively wet time of year, so plan for around 23.1°C daytime highs and 13.6°C at night.
Not quite — August is the 11th coolest month in Lac-Brome, averaging 18.4°C.
For August in Lac-Brome, pack light layers you can adjust through the day, with typical highs of 23.1°C and lows of 13.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 82% — quite humid.
Average wind speed in August is 0.3 m/s. The windiest August on record averaged 0.3 m/s (1981).
The wettest August on record was 2011 with 197 mm. On average, August sees 112 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 Lac-Brome 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.
