August is one of the warmer months of the year in Sylvan Lake, with average highs near 22.3°C and lows around 9.8°C (mean 16.1°C). It is a relatively wet time of year, averaging 71 mm of rainfall and 68% relative humidity across the period.
August is one of the warmer months of the year in Sylvan Lake. Across 45 years of records, the warmest August in Sylvan Lake was 2022 — when the month averaged 19.2°C — while the coldest was 1995 at 12.7°C. Typical August days reach 22.3°C with nights near 9.8°C. The long-term trend is warming, about 0.4°C per decade.
August is a relatively wet time of year in Sylvan Lake, averaging 71 mm of rainfall. The wettest August on record was 2005 with 120 mm, while the driest was 1983 at 24 mm.
Relative humidity in Sylvan Lake during August averages 68%. The most humid August was 1982 at 79%, and the least humid was 2001 at 58%.
August receives about 5 kWh/m²/day of solar energy in Sylvan Lake. The sunniest August was 2001 at 5.8 kWh/m²/day, and the cloudiest was 1989 at 4.3.
Average wind speed in Sylvan Lake during August is 2 m/s. The windiest Augusts were 1996, 2016 and 2021, among others at 2.2 m/s, while the calmest were 2004, 2013 and 2014 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.3°C | 15.9°C | 15.7°C | 16.3°C | 17.5°C | +2.2°C |
| Avg High | 21.6°C | 22.2°C | 22.1°C | 22.6°C | 23.8°C | +2.2°C |
| Avg Low | 9.1°C | 9.7°C | 9.3°C | 10.0°C | 11.2°C | +2.1°C |
| Avg Rain | 70 mm | 79 mm | 76 mm | 58 mm | 69 mm | -1 mm |
August temperatures in Sylvan Lake have risen by about 2°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -2.9°C (1992) to a record high of 34.4°C (2018).
Rainfall in August is a relatively wet time of year, averaging 71 mm, with a wettest year of 120 mm.
One of the best times to visit Sylvan Lake
August is one of the best times to visit Sylvan Lake. Expect days averaging 22.3°C and nights around 9.8°C (mean 16.1°C) — warmer than Sylvan Lake's yearly average — with moderate rainfall (71 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 | 17.6°C | 11.7°C | 30.4°C | 6.0°C | 58 mm | 72% | 1.9 m/s | 5.3 |
| 2024 | 23.6°C | 17.4°C | 11.2°C | 31.6°C | 7.9°C | 103 mm | 69% | 2.1 m/s | 4.8 |
| 2023 | 24.2°C | 17.8°C | 11.5°C | 32.9°C | 4.9°C | 60 mm | 67% | 2.1 m/s | 4.9 |
| 2022 🔥 | 25.5°C | 19.2°C | 12.9°C | 31.8°C | 7.0°C | 43 mm | 67% | 2 m/s | 5.5 |
| 2021 | 23.5°C | 17.0°C | 10.5°C | 33.2°C | 4.5°C | 94 mm | 63% | 2.2 m/s | 4.7 |
| 2020 | 22.5°C | 16.0°C | 9.6°C | 31.7°C | 4.4°C | 56 mm | 70% | 2.1 m/s | 5.6 |
| 2019 | 20.0°C | 14.6°C | 9.1°C | 28.9°C | 4.6°C | 65 mm | 77% | 2 m/s | 4.6 |
| 2018 | 23.8°C | 17.1°C | 10.4°C | 34.4°C | 4.9°C | 33 mm | 63% | 2 m/s | 4.9 |
| 2017 | 23.8°C | 16.7°C | 9.6°C | 32.5°C | 6.6°C | 42 mm | 64% | 1.9 m/s | 5.4 |
| 2016 | 21.9°C | 16.0°C | 10.1°C | 26.9°C | 4.4°C | 106 mm | 73% | 2.2 m/s | 4.8 |
| 2015 | 23.2°C | 16.6°C | 9.9°C | 32.0°C | 1.4°C | 71 mm | 64% | 1.9 m/s | 4.9 |
| 2014 | 22.5°C | 16.8°C | 11.1°C | 29.4°C | 4.0°C | 76 mm | 71% | 1.7 m/s | 4.7 |
| 2013 | 24.1°C | 17.6°C | 11.0°C | 29.0°C | 6.0°C | 38 mm | 66% | 1.7 m/s | 5 |
| 2012 | 23.9°C | 17.3°C | 10.8°C | 30.2°C | 6.2°C | 48 mm | 66% | 2 m/s | 5.5 |
| 2011 | 22.0°C | 15.7°C | 9.3°C | 29.2°C | 4.9°C | 55 mm | 68% | 1.8 m/s | 5.4 |
| 2010 | 20.8°C | 14.8°C | 8.7°C | 29.7°C | 1.9°C | 47 mm | 69% | 2 m/s | 4.7 |
| 2009 | 22.6°C | 15.9°C | 9.2°C | 30.9°C | 5.1°C | 74 mm | 66% | 2 m/s | 5 |
| 2008 | 23.3°C | 16.8°C | 10.4°C | 33.5°C | 3.2°C | 73 mm | 63% | 2.1 m/s | 5.3 |
| 2007 | 19.6°C | 13.8°C | 8.0°C | 29.6°C | 3.2°C | 94 mm | 72% | 1.9 m/s | 4.7 |
| 2006 | 22.5°C | 15.8°C | 9.1°C | 30.5°C | 5.3°C | 84 mm | 65% | 2 m/s | 5.2 |
| 2005 🌧️ | 19.3°C | 13.4°C | 7.6°C | 29.9°C | 2.2°C | 120 mm | 73% | 2.1 m/s | 4.5 |
| 2004 | 20.1°C | 14.8°C | 9.5°C | 28.0°C | 5.8°C | 114 mm | 76% | 1.7 m/s | 4.7 |
| 2003 | 25.6°C | 18.4°C | 11.1°C | 33.9°C | 4.8°C | 36 mm | 59% | 1.9 m/s | 5.4 |
| 2002 | 21.3°C | 14.8°C | 8.3°C | 29.1°C | 1.6°C | 84 mm | 65% | 2.1 m/s | 5 |
| 2001 | 25.4°C | 18.1°C | 10.8°C | 32.0°C | 7.2°C | 25 mm | 58% | 1.9 m/s | 5.8 |
| 2000 | 21.0°C | 14.7°C | 8.5°C | 27.5°C | 3.3°C | 58 mm | 70% | 1.9 m/s | 5.2 |
| 1999 | 21.5°C | 15.7°C | 10.0°C | 28.0°C | 4.1°C | 76 mm | 74% | 1.8 m/s | 4.7 |
| 1998 | 24.4°C | 17.9°C | 11.5°C | 33.5°C | 7.1°C | 69 mm | 63% | 1.9 m/s | 5.6 |
| 1997 | 22.5°C | 16.0°C | 9.5°C | 31.9°C | 5.8°C | 79 mm | 67% | 2 m/s | 5.1 |
| 1996 | 24.3°C | 17.1°C | 9.9°C | 31.4°C | 5.4°C | 38 mm | 60% | 2.2 m/s | 5.5 |
| 1995 ❄️ | 18.3°C | 12.7°C | 7.1°C | 28.2°C | 4.1°C | 114 mm | 74% | 2 m/s | 4.4 |
| 1994 | 21.6°C | 15.8°C | 10.0°C | 31.9°C | 3.1°C | 116 mm | 69% | 2 m/s | 4.5 |
| 1993 | 20.2°C | 14.3°C | 8.3°C | 27.5°C | 3.1°C | 71 mm | 71% | 1.9 m/s | 4.7 |
| 1992 | 21.8°C | 14.9°C | 8.1°C | 31.9°C | -2.9°C | 57 mm | 60% | 2 m/s | 5.3 |
| 1991 | 24.3°C | 17.9°C | 11.6°C | 32.4°C | 5.8°C | 97 mm | 67% | 1.8 m/s | 5.2 |
| 1990 | 22.9°C | 16.8°C | 10.7°C | 32.1°C | 3.8°C | 74 mm | 69% | 2 m/s | 5.1 |
| 1989 | 20.8°C | 15.5°C | 10.2°C | 31.0°C | 4.5°C | 111 mm | 75% | 1.9 m/s | 4.3 |
| 1988 | 21.1°C | 14.9°C | 8.7°C | 30.0°C | 5.8°C | 105 mm | 70% | 2.2 m/s | 4.7 |
| 1987 | 18.1°C | 12.8°C | 7.6°C | 25.9°C | 3.8°C | 114 mm | 75% | 2.1 m/s | 4.5 |
| 1986 | 22.5°C | 15.9°C | 9.2°C | 29.0°C | 5.2°C | 29 mm | 66% | 1.8 m/s | 5.6 |
| 1985 | 20.1°C | 13.5°C | 6.9°C | 29.4°C | 1.8°C | 107 mm | 68% | 2.1 m/s | 4.7 |
| 1984 | 24.3°C | 17.2°C | 10.2°C | 31.7°C | 2.5°C | 41 mm | 61% | 2.2 m/s | 4.9 |
| 1983 | 24.5°C | 17.7°C | 10.9°C | 30.1°C | 4.7°C | 24 mm | 65% | 1.8 m/s | — |
| 1982 | 18.4°C | 12.8°C | 7.2°C | 24.7°C | 3.2°C | 74 mm | 79% | 2.1 m/s | — |
| 1981 | 24.2°C | 17.8°C | 11.4°C | 29.8°C | 3.4°C | 30 mm | 67% | 1.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 22.3°C with lows near 9.8°C (mean 16.1°C), based on 45 years of NASA POWER data.
August averages 71 mm of rainfall in Sylvan Lake, a relatively wet time of year. The wettest on record was 120 mm in 2005.
The hottest August reached 34.4°C in 2018. The coldest dipped to -2.9°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2°C. Daytime highs moved from 22.3°C to 24.1°C and overnight lows from 9.3°C to 11.6°C over the same span.
August is one of the warmer months of the year in Sylvan Lake and a relatively wet time of year, so plan for around 22.3°C daytime highs and 9.8°C at night.
Not quite — August is the 11th coolest month in Sylvan Lake, averaging 16.1°C.
For August in Sylvan Lake, pack light layers you can adjust through the day, with typical highs of 22.3°C and lows of 9.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 68% — moderately humid.
Average wind speed in August is 2 m/s. The windiest August on record averaged 2.2 m/s (1984).
The wettest August on record was 2005 with 120 mm. On average, August sees 71 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 Sylvan Lake 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.
