August is one of the warmer months of the year in Williams Lake, with average highs near 23.5°C and lows around 8.8°C (mean 16.2°C). It is about average for rainfall, averaging 44 mm of rainfall and 62% relative humidity across the period.
August is one of the warmer months of the year in Williams Lake. Across 45 years of records, the warmest August in Williams Lake was 2022 — when the month averaged 19.2°C — while the coldest was 1995 at 11.9°C. Typical August days reach 23.5°C with nights near 8.8°C. The long-term trend is warming, about 0.4°C per decade.
August is about average for rainfall in Williams Lake, averaging 44 mm of rainfall. The wettest August on record was 1989 with 126 mm, while the driest was 2017 at 16 mm.
Relative humidity in Williams Lake during August averages 62%. The most humid August was 1995 at 75%, and the least humid was 1992 at 53%.
August receives about 5.1 kWh/m²/day of solar energy in Williams Lake. The sunniest August was 1986 at 5.7 kWh/m²/day, and the cloudiest was 1995 at 4.5.
Average wind speed in Williams Lake during August is 0.1 m/s. The windiest Augusts were 2017, 2022 and 2023, among others at 0.2 m/s, while the calmest were 2021, 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 | 15.7°C | 15.9°C | 15.7°C | 16.6°C | 17.2°C | +1.5°C |
| Avg High | 23.3°C | 23.1°C | 23.1°C | 23.9°C | 24.3°C | +1°C |
| Avg Low | 8.1°C | 8.6°C | 8.3°C | 9.4°C | 10.1°C | +2°C |
| Avg Rain | 47 mm | 47 mm | 44 mm | 35 mm | 48 mm | +1 mm |
August temperatures in Williams Lake have risen by about 2°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 0.2°C (1992) to a record high of 35°C (1981).
Rainfall in August is about average for rainfall, averaging 44 mm, with a wettest year of 126 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 Williams Lake
August is one of the best times to visit Williams Lake. Expect days averaging 23.5°C and nights around 8.8°C (mean 16.2°C) — warmer than Williams Lake's yearly average — with moderate rainfall (44 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 | 24.9°C | 17.9°C | 10.8°C | 32.7°C | 4.0°C | 45 mm | 65% | 0.1 m/s | 5.3 |
| 2024 | 25.4°C | 17.9°C | 10.5°C | 32.8°C | 3.6°C | 43 mm | 61% | 0.1 m/s | 5.2 |
| 2023 | 24.3°C | 17.4°C | 10.4°C | 32.4°C | 6.9°C | 66 mm | 63% | 0.2 m/s | 5 |
| 2022 🔥 | 26.4°C | 19.2°C | 12.0°C | 32.3°C | 7.2°C | 64 mm | 65% | 0.2 m/s | 5.3 |
| 2021 | 23.8°C | 16.7°C | 9.6°C | 34.0°C | 4.3°C | 41 mm | 61% | 0.1 m/s | 4.7 |
| 2020 | 21.1°C | 14.2°C | 7.3°C | 31.5°C | 1.7°C | 31 mm | 71% | 0.1 m/s | 4.9 |
| 2019 | 22.9°C | 15.9°C | 8.9°C | 30.2°C | 4.0°C | 40 mm | 65% | 0.1 m/s | 5.1 |
| 2018 | 24.7°C | 17.3°C | 10.0°C | 34.0°C | 3.9°C | 42 mm | 58% | 0.1 m/s | 5.2 |
| 2017 | 25.4°C | 17.6°C | 9.7°C | 32.1°C | 4.3°C | 16 mm | 59% | 0.2 m/s | 5.1 |
| 2016 | 24.1°C | 17.0°C | 9.8°C | 29.9°C | 6.9°C | 38 mm | 64% | 0.1 m/s | 5.2 |
| 2015 | 24.3°C | 16.5°C | 8.8°C | 31.1°C | 4.1°C | 35 mm | 58% | 0.1 m/s | 5.3 |
| 2014 | 24.1°C | 17.3°C | 10.6°C | 30.2°C | 4.8°C | 44 mm | 64% | 0.1 m/s | 5.2 |
| 2013 | 24.7°C | 17.7°C | 10.7°C | 32.3°C | 4.5°C | 34 mm | 60% | 0.1 m/s | 5.3 |
| 2012 | 24.2°C | 16.6°C | 9.1°C | 32.7°C | 3.9°C | 31 mm | 63% | 0.1 m/s | 5.2 |
| 2011 | 21.8°C | 14.8°C | 7.8°C | 28.6°C | 2.8°C | 19 mm | 65% | 0.2 m/s | 5.3 |
| 2010 | 22.5°C | 15.4°C | 8.4°C | 31.1°C | 3.1°C | 47 mm | 61% | 0.2 m/s | 4.9 |
| 2009 | 24.4°C | 16.6°C | 8.8°C | 32.1°C | 4.3°C | 19 mm | 57% | 0.1 m/s | 5.2 |
| 2008 | 22.8°C | 15.5°C | 8.2°C | 33.4°C | 1.9°C | 74 mm | 65% | 0.1 m/s | 4.8 |
| 2007 | 21.3°C | 14.5°C | 7.8°C | 29.4°C | 4.0°C | 45 mm | 63% | 0.1 m/s | 4.9 |
| 2006 | 23.3°C | 15.6°C | 7.8°C | 30.6°C | 2.3°C | 20 mm | 56% | 0.1 m/s | 5.3 |
| 2005 | 23.2°C | 15.5°C | 7.8°C | 29.5°C | 2.9°C | 39 mm | 61% | 0.1 m/s | 5.3 |
| 2004 | 23.8°C | 17.1°C | 10.4°C | 34.0°C | 6.4°C | 95 mm | 67% | 0.1 m/s | 4.6 |
| 2003 | 24.8°C | 16.8°C | 8.7°C | 33.0°C | 2.8°C | 23 mm | 54% | 0.1 m/s | 5.2 |
| 2002 | 23.0°C | 15.4°C | 7.8°C | 31.1°C | 3.4°C | 45 mm | 60% | 0.2 m/s | 5.1 |
| 2001 | 23.0°C | 15.9°C | 8.7°C | 31.9°C | 4.4°C | 28 mm | 66% | 0.1 m/s | 5 |
| 2000 | 21.1°C | 14.3°C | 7.4°C | 31.1°C | 2.2°C | 47 mm | 66% | 0.1 m/s | 5 |
| 1999 | 22.4°C | 15.8°C | 9.3°C | 29.8°C | 4.2°C | 34 mm | 70% | 0.1 m/s | 5 |
| 1998 | 24.7°C | 16.8°C | 9.0°C | 31.4°C | 4.6°C | 29 mm | 60% | 0.1 m/s | 5.3 |
| 1997 | 23.1°C | 16.1°C | 9.0°C | 31.5°C | 3.7°C | 32 mm | 64% | 0.1 m/s | 5.4 |
| 1996 | 23.2°C | 15.6°C | 7.9°C | 31.7°C | 4.4°C | 70 mm | 64% | 0.1 m/s | 4.7 |
| 1995 ❄️ | 17.6°C | 11.9°C | 6.1°C | 27.2°C | 2.5°C | 107 mm | 75% | 0.2 m/s | 4.5 |
| 1994 | 24.6°C | 16.6°C | 8.6°C | 33.5°C | 3.7°C | 36 mm | 56% | 0.1 m/s | 5.2 |
| 1993 | 22.4°C | 15.4°C | 8.3°C | 30.9°C | 2.4°C | 49 mm | 62% | 0.2 m/s | 4.9 |
| 1992 | 23.9°C | 16.0°C | 8.1°C | 33.0°C | 0.2°C | 29 mm | 53% | 0.1 m/s | 5.5 |
| 1991 | 24.0°C | 17.1°C | 10.1°C | 32.8°C | 3.3°C | 61 mm | 63% | 0.1 m/s | 5.1 |
| 1990 | 25.2°C | 17.3°C | 9.4°C | 33.6°C | 2.1°C | 27 mm | 57% | 0.1 m/s | 5.5 |
| 1989 🌧️ | 21.6°C | 14.9°C | 8.1°C | 30.4°C | 3.6°C | 126 mm | 68% | 0.1 m/s | 5.1 |
| 1988 | 23.2°C | 15.6°C | 8.1°C | 31.1°C | 3.1°C | 61 mm | 61% | 0.1 m/s | 4.8 |
| 1987 | 21.8°C | 14.4°C | 7.1°C | 28.7°C | 4.1°C | 40 mm | 61% | 0.2 m/s | 4.9 |
| 1986 | 26.0°C | 17.5°C | 8.9°C | 32.1°C | 2.6°C | 27 mm | 56% | 0.1 m/s | 5.7 |
| 1985 | 22.9°C | 15.2°C | 7.5°C | 28.6°C | 4.9°C | 28 mm | 55% | 0.1 m/s | 5.5 |
| 1984 | 23.3°C | 15.5°C | 7.7°C | 29.2°C | 0.4°C | 36 mm | 57% | 0.1 m/s | 4.8 |
| 1983 | 24.3°C | 16.2°C | 8.2°C | 30.3°C | 3.4°C | 21 mm | 57% | 0.1 m/s | — |
| 1982 | 20.0°C | 13.6°C | 7.2°C | 30.5°C | 3.6°C | 67 mm | 71% | 0.2 m/s | — |
| 1981 | 27.0°C | 18.5°C | 10.1°C | 35.0°C | 1.8°C | 16 mm | 55% | 0.1 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 23.5°C with lows near 8.8°C (mean 16.2°C), based on 45 years of NASA POWER data.
August averages 44 mm of rainfall in Williams Lake, about average for rainfall. The wettest on record was 126 mm in 1989.
The hottest August reached 35°C in 1981. The coldest dipped to 0.2°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 23.5°C to 25°C and overnight lows from 8.1°C to 10.7°C over the same span.
August is one of the warmer months of the year in Williams Lake and about average for rainfall, so plan for around 23.5°C daytime highs and 8.8°C at night.
Not quite — August is the 11th coolest month in Williams Lake, averaging 16.2°C.
For August in Williams Lake, pack light layers you can adjust through the day, with typical highs of 23.5°C and lows of 8.8°C.
Relative humidity in August averages 62% — moderately humid.
Average wind speed in August is 0.1 m/s. The windiest August on record averaged 0.2 m/s (1982).
The wettest August on record was 1989 with 126 mm. On average, August sees 44 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 Williams 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.
