August is one of the warmer months of the year in Bowmanville, with average highs near 26°C and lows around 16.1°C (mean 21.1°C). It is about average for rainfall, averaging 59 mm of rainfall and 67% relative humidity across the period.
August is one of the warmer months of the year in Bowmanville. Across 45 years of records, the warmest August in Bowmanville was 2016 — when the month averaged 24.2°C — while the coldest was 1992 at 17.7°C. Typical August days reach 26°C with nights near 16.1°C. The long-term trend is warming, about 0.5°C per decade.
August is about average for rainfall in Bowmanville, averaging 59 mm of rainfall. The wettest August on record was 1992 with 128 mm, while the driest was 2002 at 26 mm.
Relative humidity in Bowmanville during August averages 67%. The most humid August was 1992 at 74%, and the least humid was 2025 at 61%.
August receives about 5.1 kWh/m²/day of solar energy in Bowmanville. The sunniest Augusts were 2002, 2016 and 2019, among others at 5.6 kWh/m²/day, and the cloudiest were 1997, 2004 and 2024, among others at 4.7.
Average wind speed in Bowmanville during August is 2.8 m/s. The windiest August was 1987 at 3.4 m/s, while the calmest were 1993 and 1998 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.4°C | 20.3°C | 21.0°C | 21.8°C | 22.3°C | +1.9°C |
| Avg High | 25.5°C | 25.4°C | 26.0°C | 26.6°C | 27.3°C | +1.8°C |
| Avg Low | 15.3°C | 15.2°C | 16.1°C | 16.9°C | 17.4°C | +2.1°C |
| Avg Rain | 67 mm | 65 mm | 58 mm | 51 mm | 54 mm | -13 mm |
August temperatures in Bowmanville have risen by about 1.8°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 5.5°C (1982) to a record high of 35.5°C (2006).
Rainfall in August is about average for rainfall, averaging 59 mm, with a wettest year of 128 mm.
One of the best times to visit Bowmanville
August is one of the best times to visit Bowmanville. Expect days averaging 26°C and nights around 16.1°C (mean 21.1°C) — warmer than Bowmanville's yearly average — with moderate rainfall (59 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 | 27.2°C | 22.0°C | 16.8°C | 33.0°C | 9.4°C | 43 mm | 61% | 2.8 m/s | 5.2 |
| 2024 | 26.7°C | 21.9°C | 17.0°C | 31.5°C | 11.6°C | 45 mm | 67% | 2.7 m/s | 4.7 |
| 2023 | 25.8°C | 20.8°C | 15.8°C | 28.9°C | 10.3°C | 62 mm | 67% | 2.8 m/s | 4.9 |
| 2022 | 27.6°C | 22.6°C | 17.6°C | 32.4°C | 13.4°C | 78 mm | 66% | 2.7 m/s | 5.3 |
| 2021 | 28.9°C | 24.1°C | 19.3°C | 32.6°C | 13.4°C | 29 mm | 67% | 2.6 m/s | 5.3 |
| 2020 | 27.6°C | 22.6°C | 17.6°C | 31.8°C | 12.9°C | 65 mm | 67% | 3 m/s | 5.5 |
| 2019 | 26.3°C | 21.3°C | 16.4°C | 31.0°C | 12.1°C | 52 mm | 67% | 2.8 m/s | 5.6 |
| 2018 | 27.9°C | 23.5°C | 19.2°C | 32.7°C | 14.1°C | 65 mm | 70% | 2.8 m/s | 4.8 |
| 2017 | 25.1°C | 20.4°C | 15.7°C | 30.0°C | 10.5°C | 43 mm | 69% | 3 m/s | 5.2 |
| 2016 🔥 | 29.5°C | 24.2°C | 19.0°C | 34.8°C | 12.7°C | 49 mm | 64% | 2.8 m/s | 5.6 |
| 2015 | 25.7°C | 21.0°C | 16.2°C | 31.4°C | 12.6°C | 57 mm | 69% | 2.7 m/s | 5.2 |
| 2014 | 24.7°C | 20.0°C | 15.2°C | 28.5°C | 11.0°C | 44 mm | 71% | 2.7 m/s | 5 |
| 2013 | 26.1°C | 21.0°C | 16.0°C | 30.6°C | 11.4°C | 50 mm | 67% | 2.7 m/s | 5.4 |
| 2012 | 27.1°C | 22.1°C | 17.0°C | 32.0°C | 12.0°C | 32 mm | 64% | 2.8 m/s | 5.3 |
| 2011 | 26.6°C | 21.9°C | 17.1°C | 30.6°C | 12.5°C | 62 mm | 66% | 2.7 m/s | 4.9 |
| 2010 | 27.0°C | 22.2°C | 17.5°C | 32.7°C | 11.4°C | 54 mm | 68% | 3 m/s | 5 |
| 2009 | 25.5°C | 20.9°C | 16.3°C | 31.9°C | 11.0°C | 88 mm | 71% | 2.9 m/s | 5.1 |
| 2008 | 24.2°C | 19.6°C | 14.9°C | 27.1°C | 10.2°C | 85 mm | 73% | 2.6 m/s | 5.4 |
| 2007 | 26.8°C | 21.7°C | 16.7°C | 33.1°C | 10.8°C | 38 mm | 65% | 3.1 m/s | 5.1 |
| 2006 | 26.4°C | 21.3°C | 16.2°C | 35.5°C | 9.8°C | 49 mm | 65% | 2.9 m/s | 5.2 |
| 2005 | 27.9°C | 22.8°C | 17.6°C | 33.6°C | 12.5°C | 73 mm | 65% | 2.9 m/s | 5.1 |
| 2004 | 23.4°C | 19.1°C | 14.8°C | 26.6°C | 10.6°C | 58 mm | 74% | 2.8 m/s | 4.7 |
| 2003 | 26.3°C | 21.4°C | 16.6°C | 30.9°C | 11.4°C | 40 mm | 70% | 2.5 m/s | 5 |
| 2002 | 26.8°C | 21.4°C | 15.9°C | 31.7°C | 11.4°C | 26 mm | 65% | 2.7 m/s | 5.6 |
| 2001 | 27.1°C | 21.9°C | 16.6°C | 35.0°C | 12.5°C | 53 mm | 65% | 2.7 m/s | 5.3 |
| 2000 | 25.1°C | 20.2°C | 15.4°C | 28.9°C | 8.4°C | 71 mm | 72% | 2.8 m/s | 5.2 |
| 1999 | 24.6°C | 19.8°C | 14.9°C | 31.0°C | 9.7°C | 51 mm | 66% | 2.8 m/s | 4.9 |
| 1998 | 26.8°C | 22.0°C | 17.2°C | 30.6°C | 10.6°C | 66 mm | 66% | 2.4 m/s | 5.1 |
| 1997 | 24.5°C | 19.5°C | 14.5°C | 30.1°C | 11.4°C | 74 mm | 67% | 2.9 m/s | 4.7 |
| 1996 | 25.7°C | 20.3°C | 14.9°C | 28.9°C | 11.0°C | 34 mm | 69% | 2.5 m/s | 5.6 |
| 1995 | 27.4°C | 22.1°C | 16.8°C | 33.2°C | 9.6°C | 52 mm | 66% | 2.8 m/s | 5 |
| 1994 | 24.0°C | 18.9°C | 13.8°C | 28.6°C | 9.7°C | 62 mm | 70% | 2.8 m/s | 5 |
| 1993 | 25.9°C | 20.9°C | 15.9°C | 30.9°C | 11.3°C | 55 mm | 68% | 2.4 m/s | 5.2 |
| 1992 ❄️ 🌧️ | 22.6°C | 17.7°C | 12.8°C | 27.9°C | 9.1°C | 128 mm | 74% | 3 m/s | 5.1 |
| 1991 | 26.5°C | 21.2°C | 16.0°C | 32.0°C | 11.8°C | 45 mm | 66% | 2.9 m/s | 5 |
| 1990 | 25.7°C | 20.7°C | 15.6°C | 29.0°C | 12.7°C | 81 mm | 69% | 2.6 m/s | 4.9 |
| 1989 | 25.4°C | 20.0°C | 14.6°C | 32.3°C | 9.0°C | 46 mm | 67% | 2.8 m/s | 4.8 |
| 1988 | 26.8°C | 21.6°C | 16.4°C | 33.2°C | 10.0°C | 46 mm | 66% | 3.1 m/s | 4.8 |
| 1987 | 25.5°C | 20.4°C | 15.4°C | 31.5°C | 10.3°C | 56 mm | 63% | 3.4 m/s | 4.7 |
| 1986 | 23.9°C | 19.1°C | 14.2°C | 30.2°C | 6.5°C | 83 mm | 68% | 2.9 m/s | 5.2 |
| 1985 | 25.1°C | 19.9°C | 14.8°C | 30.6°C | 9.3°C | 79 mm | 67% | 2.9 m/s | 4.8 |
| 1984 | 26.9°C | 21.8°C | 16.6°C | 31.3°C | 9.7°C | 57 mm | 68% | 2.7 m/s | 5.1 |
| 1983 | 26.9°C | 21.7°C | 16.6°C | 33.5°C | 11.4°C | 86 mm | 67% | 2.6 m/s | — |
| 1982 | 23.6°C | 18.5°C | 13.4°C | 29.5°C | 5.5°C | 61 mm | 66% | 2.9 m/s | — |
| 1981 | 25.1°C | 20.4°C | 15.7°C | 28.6°C | 10.0°C | 88 mm | 70% | 2.5 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 26°C with lows near 16.1°C (mean 21.1°C), based on 45 years of NASA POWER data.
August averages 59 mm of rainfall in Bowmanville, about average for rainfall. The wettest on record was 128 mm in 1992.
The hottest August reached 35.5°C in 2006. The coldest dipped to 5.5°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.8°C. Daytime highs moved from 25.5°C to 27.2°C and overnight lows from 15.4°C to 17.3°C over the same span.
August is one of the warmer months of the year in Bowmanville and about average for rainfall, so plan for around 26°C daytime highs and 16.1°C at night.
Not quite — August is the 11th coolest month in Bowmanville, averaging 21.1°C.
For August in Bowmanville, pack light layers you can adjust through the day, with typical highs of 26°C and lows of 16.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 67% — moderately humid.
Average wind speed in August is 2.8 m/s. The windiest August on record averaged 3.4 m/s (1987).
The wettest August on record was 1992 with 128 mm. On average, August sees 59 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 Bowmanville 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.
