August is one of the warmer months of the year in Quebec City, with average highs near 21.2°C and lows around 12.2°C (mean 16.7°C). It is a relatively wet time of year, averaging 109 mm of rainfall and 84% relative humidity across the period.
August is one of the warmer months of the year in Quebec City. Across 45 years of records, the warmest August in Quebec City was 2021 — when the month averaged 19.4°C — while the coldest was 1982 at 13.4°C. Typical August days reach 21.2°C with nights near 12.2°C. The long-term trend is warming, about 0.5°C per decade.
August is a relatively wet time of year in Quebec City, averaging 109 mm of rainfall. The wettest August on record was 2011 with 191 mm, while the driest was 2002 at 36 mm.
Relative humidity in Quebec City during August averages 84%. The most humid August was 2015 at 88%, and the least humid was 2025 at 80%.
August receives about 4.8 kWh/m²/day of solar energy in Quebec City. 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 Quebec City during August is 1 m/s. The windiest Augusts were 1992 and 2020 at 1.2 m/s, while the calmest were 2008, 2014 and 2025, among others at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.7°C | 16.4°C | 16.7°C | 17.4°C | 17.5°C | +1.8°C |
| Avg High | 20.3°C | 21.1°C | 21.2°C | 21.6°C | 21.9°C | +1.6°C |
| Avg Low | 11.1°C | 11.7°C | 12.2°C | 13.2°C | 13.2°C | +2.1°C |
| Avg Rain | 105 mm | 108 mm | 97 mm | 120 mm | 120 mm | +15 mm |
August temperatures in Quebec City have risen by about 1.9°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 2.2°C (1986) to a record high of 28.8°C (2021).
Rainfall in August is a relatively wet time of year, averaging 109 mm, with a wettest year of 191 mm.
One of the best times to visit Quebec City
August is one of the best times to visit Quebec City. Expect days averaging 21.2°C and nights around 12.2°C (mean 16.7°C) — warmer than Quebec City's yearly average — with higher rainfall (109 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 | 22.0°C | 17.1°C | 12.2°C | 28.5°C | 5.5°C | 73 mm | 80% | 0.9 m/s | 5.3 |
| 2024 | 21.9°C | 17.7°C | 13.4°C | 27.8°C | 8.5°C | 129 mm | 84% | 1 m/s | 4.5 |
| 2023 | 20.7°C | 16.4°C | 12.2°C | 23.8°C | 7.1°C | 167 mm | 86% | 1 m/s | 4.3 |
| 2022 | 22.1°C | 17.7°C | 13.3°C | 27.4°C | 8.7°C | 146 mm | 85% | 1 m/s | 4.6 |
| 2021 🔥 | 23.7°C | 19.4°C | 15.1°C | 28.8°C | 9.7°C | 67 mm | 85% | 1 m/s | 4.8 |
| 2020 | 21.1°C | 16.9°C | 12.8°C | 26.3°C | 5.2°C | 136 mm | 84% | 1.2 m/s | 4.9 |
| 2019 | 21.4°C | 17.1°C | 12.7°C | 25.3°C | 8.4°C | 137 mm | 84% | 1.1 m/s | 5 |
| 2018 | 23.4°C | 18.9°C | 14.4°C | 26.4°C | 7.9°C | 125 mm | 85% | 1 m/s | 4.8 |
| 2017 | 20.1°C | 16.0°C | 11.8°C | 24.9°C | 7.1°C | 104 mm | 84% | 1.1 m/s | 4.9 |
| 2016 | 22.3°C | 18.1°C | 13.9°C | 25.9°C | 7.6°C | 117 mm | 84% | 1.1 m/s | 5.1 |
| 2015 | 21.7°C | 17.8°C | 13.9°C | 27.1°C | 9.8°C | 133 mm | 88% | 1 m/s | 4.6 |
| 2014 | 21.4°C | 17.2°C | 13.0°C | 26.8°C | 9.5°C | 113 mm | 84% | 0.9 m/s | 5 |
| 2013 | 20.7°C | 16.4°C | 12.1°C | 24.9°C | 7.9°C | 100 mm | 85% | 1.1 m/s | 4.7 |
| 2012 | 22.1°C | 17.9°C | 13.7°C | 26.8°C | 8.1°C | 107 mm | 85% | 1.1 m/s | 4.9 |
| 2011 🌧️ | 21.2°C | 17.2°C | 13.1°C | 25.6°C | 8.6°C | 191 mm | 86% | 1.1 m/s | 4.5 |
| 2010 | 21.9°C | 17.4°C | 12.9°C | 28.4°C | 7.8°C | 70 mm | 83% | 1.1 m/s | 5 |
| 2009 | 21.5°C | 17.4°C | 13.2°C | 26.4°C | 5.7°C | 111 mm | 85% | 1.1 m/s | 5 |
| 2008 | 20.8°C | 16.5°C | 12.2°C | 25.3°C | 7.7°C | 102 mm | 84% | 0.9 m/s | 4.6 |
| 2007 | 20.8°C | 15.7°C | 10.7°C | 27.3°C | 5.9°C | 115 mm | 82% | 0.9 m/s | 4.9 |
| 2006 | 20.2°C | 15.5°C | 10.8°C | 24.9°C | 5.0°C | 54 mm | 81% | 1 m/s | 4.9 |
| 2005 | 22.0°C | 17.4°C | 12.8°C | 25.7°C | 7.2°C | 114 mm | 83% | 1 m/s | 5 |
| 2004 | 20.4°C | 16.1°C | 11.8°C | 24.2°C | 5.9°C | 98 mm | 85% | 1 m/s | 4.5 |
| 2003 | 21.9°C | 17.5°C | 13.2°C | 26.1°C | 4.9°C | 118 mm | 83% | 1 m/s | 4.3 |
| 2002 | 22.2°C | 17.4°C | 12.7°C | 27.7°C | 6.5°C | 36 mm | 82% | 1 m/s | 5.4 |
| 2001 | 22.1°C | 17.4°C | 12.6°C | 26.4°C | 6.5°C | 89 mm | 83% | 1 m/s | 5.1 |
| 2000 | 20.5°C | 16.2°C | 11.8°C | 24.1°C | 5.6°C | 137 mm | 85% | 1 m/s | 4.4 |
| 1999 | 20.6°C | 16.1°C | 11.6°C | 26.0°C | 7.5°C | 73 mm | 82% | 1 m/s | 5.1 |
| 1998 | 21.6°C | 16.9°C | 12.2°C | 26.1°C | 7.7°C | 110 mm | 82% | 1 m/s | 5.3 |
| 1997 | 20.2°C | 15.6°C | 11.0°C | 26.3°C | 6.4°C | 149 mm | 83% | 0.9 m/s | 4.8 |
| 1996 | 21.3°C | 16.2°C | 11.1°C | 26.8°C | 6.0°C | 100 mm | 83% | 0.9 m/s | 5.3 |
| 1995 | 22.2°C | 16.9°C | 11.6°C | 26.7°C | 5.9°C | 97 mm | 80% | 1 m/s | 5.4 |
| 1994 | 19.8°C | 15.1°C | 10.3°C | 24.3°C | 5.0°C | 94 mm | 83% | 1.1 m/s | 4.9 |
| 1993 | 22.1°C | 17.6°C | 13.1°C | 27.5°C | 5.9°C | 93 mm | 84% | 0.9 m/s | 5 |
| 1992 | 19.9°C | 15.5°C | 11.1°C | 25.4°C | 6.4°C | 110 mm | 85% | 1.2 m/s | 4.4 |
| 1991 | 21.6°C | 16.9°C | 12.3°C | 26.6°C | 6.9°C | 120 mm | 83% | 1.1 m/s | 4.7 |
| 1990 | 21.8°C | 17.1°C | 12.4°C | 26.1°C | 6.2°C | 129 mm | 84% | 0.9 m/s | 4.9 |
| 1989 | 20.6°C | 16.0°C | 11.4°C | 26.0°C | 3.6°C | 104 mm | 84% | 1 m/s | 4.8 |
| 1988 | 20.6°C | 16.4°C | 12.3°C | 27.2°C | 5.3°C | 154 mm | 86% | 1 m/s | 4 |
| 1987 | 19.8°C | 15.0°C | 10.1°C | 26.8°C | 4.5°C | 67 mm | 82% | 1.1 m/s | 4.9 |
| 1986 | 19.6°C | 14.9°C | 10.3°C | 24.9°C | 2.2°C | 161 mm | 85% | 1.1 m/s | 4.8 |
| 1985 | 20.1°C | 15.3°C | 10.5°C | 24.9°C | 5.3°C | 47 mm | 82% | 0.9 m/s | 4.8 |
| 1984 | 22.0°C | 17.5°C | 13.1°C | 26.0°C | 6.7°C | 91 mm | 85% | 0.9 m/s | 5.4 |
| 1983 | 21.3°C | 16.5°C | 11.6°C | 24.9°C | 6.4°C | 70 mm | 83% | 1 m/s | — |
| 1982 ❄️ | 18.0°C | 13.4°C | 8.7°C | 23.9°C | 2.7°C | 113 mm | 83% | 1.1 m/s | — |
| 1981 | 20.7°C | 16.2°C | 11.6°C | 24.8°C | 5.3°C | 138 mm | 84% | 1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 21.2°C with lows near 12.2°C (mean 16.7°C), based on 45 years of NASA POWER data.
August averages 109 mm of rainfall in Quebec City, a relatively wet time of year. The wettest on record was 191 mm in 2011.
The hottest August reached 28.8°C in 2021. The coldest dipped to 2.2°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.9°C. Daytime highs moved from 20.4°C to 22.1°C and overnight lows from 11.1°C to 13.2°C over the same span.
August is one of the warmer months of the year in Quebec City and a relatively wet time of year, so plan for around 21.2°C daytime highs and 12.2°C at night.
Not quite — August is the 11th coolest month in Quebec City, averaging 16.7°C.
For August in Quebec City, pack light layers you can adjust through the day, with typical highs of 21.2°C and lows of 12.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 84% — quite humid.
Average wind speed in August is 1 m/s. The windiest August on record averaged 1.2 m/s (1992).
The wettest August on record was 2011 with 191 mm. On average, August sees 109 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 Quebec City 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.
