August is one of the warmer months of the year in Thetford Mines, with average highs near 22.1°C and lows around 12.4°C (mean 17.3°C). It is a relatively wet time of year, averaging 117 mm of rainfall and 84% relative humidity across the period.
August is one of the warmer months of the year in Thetford Mines. Across 45 years of records, the warmest August in Thetford Mines was 2021 — when the month averaged 20°C — while the coldest was 1982 at 14.3°C. Typical August days reach 22.1°C with nights near 12.4°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Thetford Mines, averaging 117 mm of rainfall. The wettest August on record was 2011 with 201 mm, while the driest was 2002 at 35 mm.
Relative humidity in Thetford Mines during August averages 84%. The most humid August was 2015 at 87%, and the least humid was 1987 at 80%.
August receives about 4.8 kWh/m²/day of solar energy in Thetford Mines. The sunniest Augusts were 1984, 1995 and 2002 at 5.4 kWh/m²/day, and the cloudiest was 1988 at 4.
Average wind speed in Thetford Mines during August is 0.1 m/s. The windiest Augusts were 1997, 1998 and 2005 at 0.2 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.3°C | 17.0°C | 17.3°C | 17.8°C | 17.9°C | +1.6°C |
| Avg High | 21.3°C | 22.0°C | 22.1°C | 22.5°C | 22.7°C | +1.4°C |
| Avg Low | 11.4°C | 12.0°C | 12.5°C | 13.1°C | 13.1°C | +1.7°C |
| Avg Rain | 122 mm | 117 mm | 115 mm | 117 mm | 113 mm | -10 mm |
August temperatures in Thetford Mines have risen by about 1.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 1.9°C (1982) to a record high of 33.8°C (1984).
Rainfall in August is a relatively wet time of year, averaging 117 mm, with a wettest year of 201 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit Thetford Mines
August is one of the best times to visit Thetford Mines. Expect days averaging 22.1°C and nights around 12.4°C (mean 17.3°C) — warmer than Thetford Mines's yearly average — with higher rainfall (117 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 | 22.6°C | 17.2°C | 11.7°C | 29.2°C | 5.6°C | 50 mm | 81% | 0.1 m/s | 5.3 |
| 2024 | 22.4°C | 17.8°C | 13.2°C | 29.7°C | 7.0°C | 152 mm | 85% | 0.1 m/s | 4.5 |
| 2023 | 21.2°C | 16.7°C | 12.2°C | 25.4°C | 7.8°C | 145 mm | 86% | 0.1 m/s | 4.3 |
| 2022 | 23.1°C | 18.3°C | 13.6°C | 28.4°C | 8.3°C | 166 mm | 85% | 0.1 m/s | 4.6 |
| 2021 🔥 | 24.8°C | 20.0°C | 15.2°C | 29.7°C | 9.9°C | 60 mm | 84% | 0.1 m/s | 4.8 |
| 2020 | 21.9°C | 17.2°C | 12.6°C | 27.9°C | 5.9°C | 103 mm | 84% | 0.1 m/s | 4.9 |
| 2019 | 22.4°C | 17.5°C | 12.7°C | 25.8°C | 8.6°C | 113 mm | 84% | 0.1 m/s | 5 |
| 2018 | 24.3°C | 19.4°C | 14.5°C | 29.7°C | 7.7°C | 121 mm | 85% | 0.1 m/s | 4.8 |
| 2017 | 21.3°C | 16.7°C | 12.1°C | 26.3°C | 7.7°C | 96 mm | 82% | 0.1 m/s | 4.9 |
| 2016 | 23.2°C | 18.7°C | 14.3°C | 27.2°C | 8.5°C | 154 mm | 84% | 0.1 m/s | 5.1 |
| 2015 | 22.7°C | 18.2°C | 13.7°C | 28.5°C | 9.3°C | 97 mm | 87% | 0.1 m/s | 4.6 |
| 2014 | 21.8°C | 17.2°C | 12.6°C | 27.4°C | 7.9°C | 95 mm | 84% | 0.1 m/s | 5 |
| 2013 | 21.5°C | 16.8°C | 12.1°C | 26.0°C | 7.9°C | 108 mm | 85% | 0.1 m/s | 4.7 |
| 2012 | 23.4°C | 18.5°C | 13.6°C | 27.9°C | 8.5°C | 101 mm | 84% | 0.1 m/s | 4.9 |
| 2011 🌧️ | 22.1°C | 17.6°C | 13.0°C | 26.7°C | 9.0°C | 201 mm | 86% | 0.1 m/s | 4.5 |
| 2010 | 22.5°C | 17.7°C | 12.8°C | 28.3°C | 7.1°C | 85 mm | 84% | 0.1 m/s | 5 |
| 2009 | 22.4°C | 17.8°C | 13.1°C | 28.1°C | 6.2°C | 91 mm | 84% | 0.1 m/s | 5 |
| 2008 | 21.4°C | 16.8°C | 12.2°C | 26.3°C | 7.7°C | 143 mm | 85% | 0.1 m/s | 4.6 |
| 2007 | 21.7°C | 16.5°C | 11.4°C | 27.9°C | 5.8°C | 121 mm | 83% | 0.1 m/s | 4.9 |
| 2006 | 20.6°C | 15.9°C | 11.1°C | 27.2°C | 6.2°C | 164 mm | 83% | 0.1 m/s | 4.9 |
| 2005 | 22.8°C | 17.8°C | 12.9°C | 26.8°C | 7.4°C | 127 mm | 83% | 0.2 m/s | 5 |
| 2004 | 21.5°C | 16.9°C | 12.2°C | 25.5°C | 6.7°C | 131 mm | 86% | 0.1 m/s | 4.5 |
| 2003 | 22.9°C | 18.3°C | 13.7°C | 27.2°C | 6.1°C | 135 mm | 84% | 0.1 m/s | 4.3 |
| 2002 | 22.8°C | 18.0°C | 13.2°C | 28.6°C | 7.0°C | 35 mm | 82% | 0.1 m/s | 5.4 |
| 2001 | 23.7°C | 18.4°C | 13.2°C | 27.5°C | 6.9°C | 87 mm | 81% | 0.1 m/s | 5.1 |
| 2000 | 21.5°C | 16.8°C | 12.1°C | 25.4°C | 8.2°C | 112 mm | 85% | 0.1 m/s | 4.4 |
| 1999 | 21.4°C | 16.6°C | 11.8°C | 27.3°C | 7.3°C | 93 mm | 83% | 0.1 m/s | 5.1 |
| 1998 | 22.7°C | 17.7°C | 12.8°C | 28.8°C | 6.8°C | 124 mm | 81% | 0.2 m/s | 5.3 |
| 1997 | 21.0°C | 16.2°C | 11.3°C | 26.3°C | 6.7°C | 122 mm | 82% | 0.2 m/s | 4.8 |
| 1996 | 22.3°C | 17.0°C | 11.8°C | 27.5°C | 6.1°C | 81 mm | 83% | 0.1 m/s | 5.3 |
| 1995 | 22.6°C | 17.1°C | 11.7°C | 27.4°C | 5.7°C | 99 mm | 82% | 0.1 m/s | 5.4 |
| 1994 | 20.9°C | 16.0°C | 11.1°C | 25.7°C | 6.0°C | 90 mm | 83% | 0.1 m/s | 4.9 |
| 1993 | 23.2°C | 18.1°C | 12.9°C | 27.4°C | 6.6°C | 137 mm | 84% | 0.1 m/s | 5 |
| 1992 | 20.9°C | 16.1°C | 11.4°C | 26.5°C | 7.1°C | 113 mm | 85% | 0.1 m/s | 4.4 |
| 1991 | 22.5°C | 17.6°C | 12.8°C | 26.9°C | 6.8°C | 143 mm | 85% | 0.1 m/s | 4.7 |
| 1990 | 22.5°C | 17.5°C | 12.4°C | 26.7°C | 5.6°C | 167 mm | 84% | 0.1 m/s | 4.9 |
| 1989 | 21.3°C | 16.3°C | 11.4°C | 29.2°C | 3.6°C | 161 mm | 84% | 0.1 m/s | 4.8 |
| 1988 | 22.2°C | 17.5°C | 12.8°C | 28.6°C | 4.3°C | 188 mm | 85% | 0.1 m/s | 4 |
| 1987 | 20.9°C | 15.6°C | 10.2°C | 28.4°C | 5.4°C | 52 mm | 80% | 0.1 m/s | 4.9 |
| 1986 | 20.7°C | 15.6°C | 10.6°C | 26.0°C | 2.3°C | 153 mm | 84% | 0.1 m/s | 4.8 |
| 1985 | 20.6°C | 15.6°C | 10.7°C | 26.0°C | 5.7°C | 74 mm | 83% | 0.1 m/s | 4.8 |
| 1984 | 23.1°C | 18.4°C | 13.7°C | 33.8°C | 6.9°C | 94 mm | 84% | 0.1 m/s | 5.4 |
| 1983 | 22.1°C | 17.1°C | 12.1°C | 26.6°C | 5.8°C | 118 mm | 84% | 0.1 m/s | — |
| 1982 ❄️ | 19.3°C | 14.3°C | 9.4°C | 26.6°C | 1.9°C | 125 mm | 82% | 0.1 m/s | — |
| 1981 | 21.5°C | 16.5°C | 11.6°C | 25.3°C | 5.7°C | 134 mm | 83% | 0.1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 22.1°C with lows near 12.4°C (mean 17.3°C), based on 45 years of NASA POWER data.
August averages 117 mm of rainfall in Thetford Mines, a relatively wet time of year. The wettest on record was 201 mm in 2011.
The hottest August reached 33.8°C in 1984. The coldest dipped to 1.9°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 21.3°C to 22.8°C and overnight lows from 11.5°C to 13.2°C over the same span.
August is one of the warmer months of the year in Thetford Mines and a relatively wet time of year, so plan for around 22.1°C daytime highs and 12.4°C at night.
Not quite — August is the 11th coolest month in Thetford Mines, averaging 17.3°C.
For August in Thetford Mines, pack light layers you can adjust through the day, with typical highs of 22.1°C and lows of 12.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 84% — quite humid.
Average wind speed in August is 0.1 m/s. The windiest August on record averaged 0.2 m/s (1997).
The wettest August on record was 2011 with 201 mm. On average, August sees 117 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 Thetford Mines 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.
