August is one of the warmer months of the year in Penticton, with average highs near 22.9°C and lows around 8.7°C (mean 15.8°C). It is one of the drier months, averaging 29 mm of rainfall and 62% relative humidity across the period.
August is one of the warmer months of the year in Penticton. Across 45 years of records, the warmest August in Penticton was 2022 — when the month averaged 18.5°C — while the coldest was 1995 at 12.1°C. Typical August days reach 22.9°C with nights near 8.7°C. The long-term trend is warming, about 0.4°C per decade.
August is one of the drier months in Penticton, averaging 29 mm of rainfall. The wettest August on record was 2004 with 69 mm, while the driest was 2017 at 5 mm.
Relative humidity in Penticton during August averages 62%. The most humid August was 2025 at 72%, and the least humid was 2003 at 52%.
August receives about 5.6 kWh/m²/day of solar energy in Penticton. The sunniest Augusts were 2005, 2011 and 2012, among others at 6.3 kWh/m²/day, and the cloudiest was 2021 at 4.7.
Average wind speed in Penticton during August is 0.3 m/s. The windiest Augusts were 2021, 2022 and 2023, among others at 0.3 m/s, while the calmest were 2000, 2024 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.2°C | 15.3°C | 15.9°C | 16.4°C | 16.5°C | +1.3°C |
| Avg High | 22.2°C | 22.3°C | 23.3°C | 23.4°C | 23.4°C | +1.2°C |
| Avg Low | 8.1°C | 8.3°C | 8.4°C | 9.4°C | 9.7°C | +1.6°C |
| Avg Rain | 31 mm | 33 mm | 27 mm | 22 mm | 36 mm | +5 mm |
August temperatures in Penticton have risen by about 1.7°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 1°C (1992) to a record high of 34.8°C (2003).
Rainfall in August is one of the drier months, averaging 29 mm, with a wettest year of 69 mm.
One of the best times to visit Penticton
August is one of the best times to visit Penticton. Expect days averaging 22.9°C and nights around 8.7°C (mean 15.8°C) — warmer than Penticton's yearly average — with low rainfall (29 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 | 21.9°C | 16.0°C | 10.2°C | 29.0°C | 5.3°C | 45 mm | 72% | 0.2 m/s | 5.3 |
| 2024 | 23.1°C | 16.5°C | 10.0°C | 31.5°C | 4.5°C | 57 mm | 67% | 0.2 m/s | 5.2 |
| 2023 | 24.4°C | 17.1°C | 9.8°C | 33.7°C | 5.0°C | 40 mm | 62% | 0.3 m/s | 5.3 |
| 2022 🔥 | 25.8°C | 18.5°C | 11.3°C | 31.0°C | 5.2°C | 23 mm | 62% | 0.3 m/s | 5.6 |
| 2021 | 22.5°C | 15.9°C | 9.3°C | 31.2°C | 2.6°C | 36 mm | 66% | 0.3 m/s | 4.7 |
| 2020 | 22.5°C | 15.1°C | 7.8°C | 30.5°C | 1.7°C | 15 mm | 66% | 0.3 m/s | 6 |
| 2019 | 23.7°C | 16.5°C | 9.4°C | 30.4°C | 5.5°C | 24 mm | 61% | 0.3 m/s | 5.7 |
| 2018 | 22.7°C | 16.0°C | 9.3°C | 32.0°C | 4.6°C | 15 mm | 64% | 0.3 m/s | 5.1 |
| 2017 | 25.2°C | 17.8°C | 10.5°C | 30.5°C | 4.6°C | 5 mm | 58% | 0.3 m/s | 5.8 |
| 2016 | 23.1°C | 16.0°C | 8.9°C | 28.1°C | 4.6°C | 28 mm | 63% | 0.3 m/s | 5.8 |
| 2015 | 23.4°C | 16.4°C | 9.4°C | 31.5°C | 5.5°C | 30 mm | 57% | 0.3 m/s | 5.1 |
| 2014 | 23.2°C | 16.9°C | 10.6°C | 30.8°C | 5.3°C | 47 mm | 66% | 0.3 m/s | 5.1 |
| 2013 | 22.9°C | 16.6°C | 10.3°C | 27.8°C | 6.0°C | 40 mm | 65% | 0.3 m/s | 5.1 |
| 2012 | 24.7°C | 17.0°C | 9.4°C | 31.0°C | 4.3°C | 8 mm | 59% | 0.3 m/s | 6.3 |
| 2011 | 23.6°C | 16.0°C | 8.4°C | 28.7°C | 3.8°C | 6 mm | 60% | 0.3 m/s | 6.3 |
| 2010 | 21.7°C | 14.8°C | 7.9°C | 29.3°C | 2.1°C | 20 mm | 62% | 0.3 m/s | 5.5 |
| 2009 | 23.9°C | 16.3°C | 8.8°C | 31.0°C | 3.6°C | 39 mm | 60% | 0.3 m/s | 5.7 |
| 2008 | 22.5°C | 15.4°C | 8.4°C | 33.1°C | 1.7°C | 44 mm | 60% | 0.3 m/s | 5.4 |
| 2007 | 21.5°C | 14.2°C | 6.9°C | 29.8°C | 3.9°C | 17 mm | 61% | 0.3 m/s | 5.6 |
| 2006 | 23.1°C | 15.6°C | 8.1°C | 29.6°C | 4.6°C | 8 mm | 56% | 0.3 m/s | 5.8 |
| 2005 | 23.4°C | 15.9°C | 8.3°C | 29.0°C | 2.6°C | 25 mm | 56% | 0.3 m/s | 6.3 |
| 2004 🌧️ | 23.7°C | 17.2°C | 10.7°C | 33.5°C | 6.2°C | 69 mm | 65% | 0.3 m/s | 5.1 |
| 2003 | 25.3°C | 17.3°C | 9.2°C | 34.8°C | 4.6°C | 7 mm | 52% | 0.3 m/s | 6 |
| 2002 | 22.5°C | 14.9°C | 7.4°C | 28.7°C | 3.6°C | 18 mm | 59% | 0.3 m/s | 5.9 |
| 2001 | 24.5°C | 16.8°C | 9.1°C | 31.8°C | 4.6°C | 27 mm | 56% | 0.3 m/s | 5.9 |
| 2000 | 22.5°C | 14.9°C | 7.3°C | 30.1°C | 2.5°C | 18 mm | 60% | 0.2 m/s | 6.1 |
| 1999 | 23.3°C | 16.3°C | 9.3°C | 30.7°C | 2.9°C | 42 mm | 64% | 0.3 m/s | 5.4 |
| 1998 | 25.2°C | 17.2°C | 9.1°C | 32.0°C | 3.6°C | 13 mm | 59% | 0.3 m/s | 6.3 |
| 1997 | 22.6°C | 15.9°C | 9.2°C | 30.9°C | 4.1°C | 24 mm | 64% | 0.3 m/s | 5.6 |
| 1996 | 23.1°C | 15.8°C | 8.6°C | 31.4°C | 3.0°C | 19 mm | 58% | 0.3 m/s | 5.7 |
| 1995 ❄️ | 18.6°C | 12.1°C | 5.5°C | 27.7°C | 2.6°C | 43 mm | 67% | 0.3 m/s | 4.9 |
| 1994 | 23.7°C | 16.1°C | 8.4°C | 32.3°C | 3.2°C | 30 mm | 56% | 0.3 m/s | 5.5 |
| 1993 | 19.7°C | 13.4°C | 7.2°C | 25.9°C | 2.7°C | 34 mm | 68% | 0.3 m/s | 5.4 |
| 1992 | 22.9°C | 15.4°C | 8.0°C | 30.1°C | 1.0°C | 18 mm | 57% | 0.3 m/s | 5.7 |
| 1991 | 21.6°C | 15.3°C | 8.9°C | 28.1°C | 3.5°C | 59 mm | 71% | 0.2 m/s | 5.5 |
| 1990 | 22.3°C | 15.6°C | 8.8°C | 29.8°C | 2.4°C | 46 mm | 67% | 0.3 m/s | 5.5 |
| 1989 | 20.4°C | 14.0°C | 7.6°C | 29.9°C | 3.8°C | 59 mm | 68% | 0.2 m/s | 4.9 |
| 1988 | 22.6°C | 15.1°C | 7.6°C | 31.5°C | 2.0°C | 23 mm | 60% | 0.3 m/s | 5.5 |
| 1987 | 22.1°C | 14.7°C | 7.2°C | 29.7°C | 2.0°C | 13 mm | 59% | 0.3 m/s | 5.6 |
| 1986 | 24.8°C | 17.2°C | 9.7°C | 31.8°C | 5.1°C | 11 mm | 57% | 0.3 m/s | 6.1 |
| 1985 | 21.0°C | 13.9°C | 6.7°C | 26.9°C | 3.4°C | 30 mm | 59% | 0.3 m/s | 5.4 |
| 1984 | 21.8°C | 14.6°C | 7.4°C | 27.3°C | 1.5°C | 32 mm | 65% | 0.3 m/s | 5.6 |
| 1983 | 21.6°C | 15.2°C | 8.8°C | 28.1°C | 4.0°C | 37 mm | 69% | 0.3 m/s | — |
| 1982 | 20.5°C | 14.0°C | 7.5°C | 27.2°C | 2.8°C | 39 mm | 68% | 0.3 m/s | — |
| 1981 | 25.1°C | 17.7°C | 10.4°C | 31.5°C | 4.9°C | 38 mm | 61% | 0.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 22.9°C with lows near 8.7°C (mean 15.8°C), based on 45 years of NASA POWER data.
August averages 29 mm of rainfall in Penticton, one of the drier months. The wettest on record was 69 mm in 2004.
The hottest August reached 34.8°C in 2003. The coldest dipped to 1°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.7°C. Daytime highs moved from 22°C to 23.5°C and overnight lows from 8.2°C to 10.1°C over the same span.
August is one of the warmer months of the year in Penticton and one of the drier months, so plan for around 22.9°C daytime highs and 8.7°C at night.
Not quite — August is the 12th coolest month in Penticton, averaging 15.8°C.
For August in Penticton, pack light layers you can adjust through the day, with typical highs of 22.9°C and lows of 8.7°C.
Relative humidity in August averages 62% — moderately humid.
Average wind speed in August is 0.3 m/s. The windiest August on record averaged 0.3 m/s (1981).
The wettest August on record was 2004 with 69 mm. On average, August sees 29 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 Penticton 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.
