August is one of the warmer months of the year in Courtenay, with average highs near 21.8°C and lows around 10.8°C (mean 16.3°C). It is one of the drier months, averaging 38 mm of rainfall and 80% relative humidity across the period.
August is one of the warmer months of the year in Courtenay. Across 45 years of records, the warmest August in Courtenay was 2022 — when the month averaged 19°C — while the coldest was 1984 at 13.9°C. Typical August days reach 21.8°C with nights near 10.8°C. The long-term trend is warming, about 0.6°C per decade.
August is one of the drier months in Courtenay, averaging 38 mm of rainfall. The wettest August on record was 1991 with 128 mm, while the driest was 2006 at 8 mm.
Relative humidity in Courtenay during August averages 80%. The most humid August was 2013 at 84%, and the least humid was 2021 at 72%.
August receives about 5.2 kWh/m²/day of solar energy in Courtenay. The sunniest August was 2006 at 6 kWh/m²/day, and the cloudiest was 1984 at 4.3.
Average wind speed in Courtenay during August is 0.5 m/s. The windiest Augusts were 2018, 2020 and 2021, among others at 0.5 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.5°C | 16.0°C | 16.0°C | 16.9°C | 17.8°C | +2.3°C |
| Avg High | 21.1°C | 21.1°C | 21.4°C | 22.4°C | 23.8°C | +2.7°C |
| Avg Low | 10.0°C | 10.8°C | 10.5°C | 11.4°C | 11.9°C | +1.9°C |
| Avg Rain | 27 mm | 51 mm | 33 mm | 36 mm | 42 mm | +15 mm |
August temperatures in Courtenay have risen by about 3.2°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 4.8°C (1999) to a record high of 32.1°C (1981).
Rainfall in August is one of the drier months, averaging 38 mm, with a wettest year of 128 mm.
One of the best times to visit Courtenay
August is one of the best times to visit Courtenay. Expect days averaging 21.8°C and nights around 10.8°C (mean 16.3°C) — warmer than Courtenay's yearly average — with moderate rainfall (38 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 | 23.9°C | 18.1°C | 12.4°C | 29.9°C | 7.8°C | 50 mm | 77% | 0.4 m/s | 5.3 |
| 2024 | 23.7°C | 17.9°C | 12.2°C | 30.3°C | 6.4°C | 62 mm | 77% | 0.4 m/s | 4.9 |
| 2023 | 25.0°C | 18.6°C | 12.1°C | 31.6°C | 8.6°C | 39 mm | 73% | 0.4 m/s | 5.3 |
| 2022 🔥 | 25.0°C | 19.0°C | 12.9°C | 30.3°C | 8.9°C | 21 mm | 77% | 0.4 m/s | 5.6 |
| 2021 | 24.4°C | 18.2°C | 12.0°C | 31.7°C | 6.2°C | 16 mm | 72% | 0.5 m/s | 5.4 |
| 2020 | 20.8°C | 15.3°C | 9.8°C | 28.4°C | 6.8°C | 63 mm | 81% | 0.5 m/s | 5.2 |
| 2019 | 22.4°C | 17.1°C | 11.7°C | 28.6°C | 7.7°C | 57 mm | 80% | 0.4 m/s | 5 |
| 2018 | 23.2°C | 17.6°C | 12.0°C | 30.8°C | 8.5°C | 28 mm | 78% | 0.5 m/s | 5.5 |
| 2017 | 23.8°C | 18.0°C | 12.1°C | 30.0°C | 8.0°C | 17 mm | 79% | 0.5 m/s | 5.7 |
| 2016 | 22.4°C | 16.9°C | 11.3°C | 28.8°C | 8.1°C | 51 mm | 81% | 0.4 m/s | 5.3 |
| 2015 | 22.5°C | 16.8°C | 11.1°C | 28.8°C | 8.2°C | 52 mm | 76% | 0.5 m/s | 5.3 |
| 2014 | 24.4°C | 18.3°C | 12.2°C | 29.6°C | 9.2°C | 27 mm | 76% | 0.4 m/s | 5.5 |
| 2013 | 21.1°C | 16.4°C | 11.6°C | 27.2°C | 7.3°C | 70 mm | 84% | 0.4 m/s | 4.5 |
| 2012 | 21.9°C | 16.4°C | 10.9°C | 31.6°C | 6.1°C | 15 mm | 80% | 0.5 m/s | 5.2 |
| 2011 | 21.0°C | 15.5°C | 10.0°C | 25.6°C | 6.9°C | 14 mm | 81% | 0.5 m/s | 5.4 |
| 2010 | 21.6°C | 16.2°C | 10.8°C | 31.4°C | 6.2°C | 28 mm | 79% | 0.5 m/s | 5.5 |
| 2009 | 22.3°C | 16.5°C | 10.8°C | 31.0°C | 7.3°C | 18 mm | 77% | 0.5 m/s | 5.1 |
| 2008 | 20.3°C | 15.1°C | 9.9°C | 28.6°C | 5.2°C | 58 mm | 83% | 0.5 m/s | 4.8 |
| 2007 | 20.4°C | 15.4°C | 10.4°C | 27.0°C | 7.8°C | 39 mm | 81% | 0.5 m/s | 4.8 |
| 2006 | 21.2°C | 15.2°C | 9.3°C | 25.5°C | 6.4°C | 8 mm | 79% | 0.5 m/s | 6 |
| 2005 | 22.5°C | 17.0°C | 11.4°C | 28.2°C | 8.1°C | 24 mm | 79% | 0.5 m/s | 5.7 |
| 2004 | 23.2°C | 17.9°C | 12.5°C | 29.9°C | 9.5°C | 59 mm | 78% | 0.4 m/s | 4.9 |
| 2003 | 22.1°C | 16.4°C | 10.6°C | 27.5°C | 6.5°C | 11 mm | 77% | 0.5 m/s | 5.6 |
| 2002 | 21.9°C | 16.1°C | 10.4°C | 27.6°C | 7.4°C | 17 mm | 79% | 0.4 m/s | 5.6 |
| 2001 | 19.9°C | 15.2°C | 10.5°C | 29.3°C | 8.1°C | 59 mm | 84% | 0.5 m/s | 4.5 |
| 2000 | 20.0°C | 14.7°C | 9.4°C | 28.4°C | 6.1°C | 39 mm | 82% | 0.5 m/s | 5.2 |
| 1999 | 21.0°C | 16.2°C | 11.3°C | 26.6°C | 4.8°C | 42 mm | 83% | 0.5 m/s | 5 |
| 1998 | 22.0°C | 16.3°C | 10.6°C | 28.1°C | 8.5°C | 13 mm | 81% | 0.5 m/s | 5.5 |
| 1997 | 22.1°C | 17.2°C | 12.4°C | 29.4°C | 10.1°C | 80 mm | 81% | 0.5 m/s | 5.1 |
| 1996 | 20.5°C | 15.2°C | 9.9°C | 27.0°C | 7.3°C | 38 mm | 83% | 0.5 m/s | 4.8 |
| 1995 | 18.6°C | 14.0°C | 9.4°C | 25.5°C | 6.7°C | 52 mm | 81% | 0.5 m/s | 4.6 |
| 1994 | 21.1°C | 15.9°C | 10.6°C | 26.3°C | 8.3°C | 43 mm | 79% | 0.5 m/s | 4.7 |
| 1993 | 21.2°C | 16.0°C | 10.8°C | 31.5°C | 6.1°C | 36 mm | 80% | 0.5 m/s | 5.1 |
| 1992 | 21.2°C | 15.9°C | 10.5°C | 26.5°C | 5.7°C | 41 mm | 80% | 0.4 m/s | 5.4 |
| 1991 🌧️ | 21.2°C | 16.2°C | 11.3°C | 28.9°C | 7.4°C | 128 mm | 82% | 0.5 m/s | 5 |
| 1990 | 22.4°C | 16.9°C | 11.5°C | 31.3°C | 7.6°C | 34 mm | 78% | 0.4 m/s | 5.2 |
| 1989 | 20.6°C | 15.2°C | 9.9°C | 25.2°C | 7.1°C | 38 mm | 82% | 0.4 m/s | 4.9 |
| 1988 | 20.9°C | 15.4°C | 9.9°C | 27.2°C | 6.5°C | 29 mm | 80% | 0.4 m/s | 4.9 |
| 1987 | 21.7°C | 15.7°C | 9.8°C | 27.3°C | 5.8°C | 12 mm | 78% | 0.4 m/s | 5.8 |
| 1986 | 23.8°C | 17.6°C | 11.3°C | 30.7°C | 6.1°C | 9 mm | 79% | 0.4 m/s | 5.8 |
| 1985 | 20.4°C | 14.9°C | 9.3°C | 25.9°C | 5.9°C | 21 mm | 78% | 0.4 m/s | 5.3 |
| 1984 ❄️ | 18.9°C | 13.9°C | 8.8°C | 24.7°C | 6.1°C | 27 mm | 83% | 0.5 m/s | 4.3 |
| 1983 | 20.7°C | 15.2°C | 9.6°C | 24.3°C | 7.4°C | 33 mm | 80% | 0.5 m/s | — |
| 1982 | 19.6°C | 14.5°C | 9.4°C | 26.8°C | 6.0°C | 32 mm | 81% | 0.4 m/s | — |
| 1981 | 23.1°C | 17.3°C | 11.6°C | 32.1°C | 8.1°C | 39 mm | 79% | 0.4 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 21.8°C with lows near 10.8°C (mean 16.3°C), based on 45 years of NASA POWER data.
August averages 38 mm of rainfall in Courtenay, one of the drier months. The wettest on record was 128 mm in 1991.
The hottest August reached 32.1°C in 1981. The coldest dipped to 4.8°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 3.2°C. Daytime highs moved from 20.5°C to 24.4°C and overnight lows from 9.7°C to 12.3°C over the same span.
August is one of the warmer months of the year in Courtenay and one of the drier months, so plan for around 21.8°C daytime highs and 10.8°C at night.
Not quite — August is the 12th coolest month in Courtenay, averaging 16.3°C.
For August in Courtenay, pack light layers you can adjust through the day, with typical highs of 21.8°C and lows of 10.8°C.
Relative humidity in August averages 80% — quite humid.
Average wind speed in August is 0.5 m/s. The windiest August on record averaged 0.5 m/s (1983).
The wettest August on record was 1991 with 128 mm. On average, August sees 38 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 Courtenay 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.
