August is one of the warmer months of the year in Prince Rupert, with average highs near 16.2°C and lows around 12.1°C (mean 14.2°C). It is one of the drier months, averaging 147 mm of rainfall and 86% relative humidity across the period.
August is one of the warmer months of the year in Prince Rupert. Across 45 years of records, the warmest August in Prince Rupert was 2004 — when the month averaged 16.4°C — while the coldest was 1985 at 12.7°C. Typical August days reach 16.2°C with nights near 12.1°C. The long-term trend is warming, about 0.2°C per decade.
August is one of the drier months in Prince Rupert, averaging 147 mm of rainfall. The wettest August on record was 2020 with 375 mm, while the driest was 1992 at 63 mm.
Relative humidity in Prince Rupert during August averages 86%. The most humid August was 2020 at 89%, and the least humid was 2004 at 82%.
August receives about 3.9 kWh/m²/day of solar energy in Prince Rupert. The sunniest August was 2004 at 4.7 kWh/m²/day, and the cloudiest was 2020 at 3.
Average wind speed in Prince Rupert during August is 2.4 m/s. The windiest August was 2020 at 3.4 m/s, while the calmest was 2004 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.7°C | 14.3°C | 14.1°C | 14.3°C | 14.7°C | +1°C |
| Avg High | 15.9°C | 16.5°C | 16.0°C | 16.3°C | 16.7°C | +0.8°C |
| Avg Low | 11.5°C | 12.2°C | 12.1°C | 12.3°C | 12.7°C | +1.2°C |
| Avg Rain | 128 mm | 132 mm | 169 mm | 140 mm | 179 mm | +51 mm |
August temperatures in Prince Rupert have risen by about 1.5°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 8.4°C (1984) to a record high of 27.2°C (1990).
Rainfall in August is one of the drier months, averaging 147 mm, with a wettest year of 375 mm.
One of the best times to visit Prince Rupert
August is one of the best times to visit Prince Rupert. Expect days averaging 16.2°C and nights around 12.1°C (mean 14.2°C) — warmer than Prince Rupert's yearly average — with higher rainfall (147 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 | 17.2°C | 15.1°C | 13.0°C | 21.4°C | 11.0°C | 158 mm | 87% | 2.2 m/s | 4 |
| 2024 | 17.4°C | 15.1°C | 12.7°C | 24.9°C | 9.4°C | 98 mm | 85% | 2.2 m/s | 4.6 |
| 2023 | 17.6°C | 15.4°C | 13.2°C | 22.5°C | 11.0°C | 96 mm | 86% | 2.2 m/s | 4.1 |
| 2022 | 17.2°C | 15.2°C | 13.2°C | 20.5°C | 11.5°C | 162 mm | 89% | 2.6 m/s | 4.4 |
| 2021 | 15.7°C | 14.0°C | 12.3°C | 21.2°C | 10.0°C | 182 mm | 88% | 2.8 m/s | 3.9 |
| 2020 🌧️ | 14.8°C | 13.4°C | 12.0°C | 17.3°C | 10.3°C | 375 mm | 89% | 3.4 m/s | 3 |
| 2019 | 16.7°C | 14.7°C | 12.7°C | 19.8°C | 10.1°C | 158 mm | 86% | 2.4 m/s | 3.9 |
| 2018 | 16.5°C | 14.5°C | 12.5°C | 21.6°C | 10.6°C | 89 mm | 87% | 2.6 m/s | 4.4 |
| 2017 | 16.4°C | 14.4°C | 12.3°C | 23.2°C | 10.2°C | 239 mm | 88% | 3.1 m/s | 3.6 |
| 2016 | 17.1°C | 15.0°C | 13.0°C | 21.1°C | 11.8°C | 80 mm | 88% | 2.4 m/s | 4.2 |
| 2015 | 16.0°C | 14.0°C | 12.1°C | 19.7°C | 9.9°C | 157 mm | 87% | 2.5 m/s | 3.7 |
| 2014 | 17.1°C | 15.0°C | 13.0°C | 22.4°C | 11.6°C | 135 mm | 87% | 2.3 m/s | 4.3 |
| 2013 | 16.9°C | 14.8°C | 12.7°C | 19.5°C | 10.7°C | 101 mm | 86% | 2.1 m/s | 3.8 |
| 2012 | 15.9°C | 13.9°C | 12.0°C | 20.7°C | 10.1°C | 86 mm | 86% | 1.8 m/s | 3.8 |
| 2011 | 14.5°C | 12.8°C | 11.0°C | 16.9°C | 9.0°C | 213 mm | 87% | 2.9 m/s | 3.9 |
| 2010 | 15.8°C | 13.7°C | 11.6°C | 24.8°C | 9.6°C | 142 mm | 86% | 2.3 m/s | 4.1 |
| 2009 | 15.8°C | 13.9°C | 11.9°C | 21.9°C | 10.4°C | 155 mm | 86% | 2.7 m/s | 3.8 |
| 2008 | 14.9°C | 13.1°C | 11.4°C | 18.3°C | 9.7°C | 227 mm | 89% | 2.8 m/s | 3.6 |
| 2007 | 16.5°C | 14.4°C | 12.3°C | 22.0°C | 11.2°C | 92 mm | 83% | 2.1 m/s | 4.5 |
| 2006 | 14.5°C | 12.9°C | 11.3°C | 17.6°C | 10.2°C | 108 mm | 87% | 2.5 m/s | 3.8 |
| 2005 | 17.2°C | 15.2°C | 13.1°C | 23.9°C | 11.1°C | 166 mm | 86% | 2.1 m/s | 4 |
| 2004 🔥 | 18.8°C | 16.4°C | 14.0°C | 25.4°C | 12.0°C | 84 mm | 82% | 1.6 m/s | 4.7 |
| 2003 | 15.9°C | 14.0°C | 12.0°C | 22.1°C | 10.0°C | 164 mm | 86% | 2.4 m/s | 4.2 |
| 2002 | 15.4°C | 13.6°C | 11.9°C | 18.8°C | 10.5°C | 198 mm | 88% | 2.9 m/s | 3.7 |
| 2001 | 15.8°C | 13.9°C | 11.9°C | 19.9°C | 10.4°C | 237 mm | 87% | 2.8 m/s | 3.5 |
| 2000 | 14.9°C | 13.2°C | 11.5°C | 18.7°C | 9.8°C | 256 mm | 88% | 3.1 m/s | 3.9 |
| 1999 | 15.6°C | 13.6°C | 11.6°C | 23.4°C | 9.1°C | 182 mm | 86% | 2.4 m/s | 3.5 |
| 1998 | 15.6°C | 13.7°C | 11.8°C | 19.4°C | 9.5°C | 247 mm | 86% | 2.7 m/s | 3.8 |
| 1997 | 17.6°C | 15.4°C | 13.2°C | 23.1°C | 11.3°C | 114 mm | 86% | 2.3 m/s | 4.3 |
| 1996 | 15.1°C | 13.3°C | 11.6°C | 18.0°C | 10.1°C | 139 mm | 88% | 2.5 m/s | 3.5 |
| 1995 | 14.9°C | 13.1°C | 11.2°C | 18.2°C | 9.8°C | 94 mm | 85% | 2 m/s | 4.3 |
| 1994 | 18.5°C | 15.8°C | 13.2°C | 24.2°C | 10.4°C | 79 mm | 83% | 1.7 m/s | 3.9 |
| 1993 | 17.2°C | 14.6°C | 12.0°C | 25.9°C | 9.8°C | 75 mm | 83% | 2.2 m/s | 4.2 |
| 1992 | 16.5°C | 14.1°C | 11.7°C | 20.4°C | 9.5°C | 63 mm | 83% | 2.2 m/s | 4 |
| 1991 | 16.0°C | 14.0°C | 11.9°C | 21.7°C | 9.8°C | 197 mm | 86% | 3.1 m/s | 3.9 |
| 1990 | 18.2°C | 15.7°C | 13.3°C | 27.2°C | 10.9°C | 126 mm | 82% | 2.3 m/s | 3.5 |
| 1989 | 16.5°C | 14.3°C | 12.2°C | 22.1°C | 10.8°C | 101 mm | 86% | 1.8 m/s | 3.8 |
| 1988 | 15.6°C | 13.5°C | 11.4°C | 20.8°C | 9.7°C | 158 mm | 87% | 2.5 m/s | 3.5 |
| 1987 | 16.4°C | 14.1°C | 11.7°C | 23.7°C | 9.9°C | 127 mm | 84% | 2.2 m/s | 4.3 |
| 1986 | 16.3°C | 14.1°C | 11.8°C | 19.8°C | 9.2°C | 87 mm | 83% | 1.9 m/s | 4.1 |
| 1985 ❄️ | 14.9°C | 12.7°C | 10.5°C | 20.9°C | 8.9°C | 97 mm | 85% | 2.6 m/s | 3.6 |
| 1984 | 15.1°C | 13.1°C | 11.1°C | 21.6°C | 8.4°C | 196 mm | 84% | 2.5 m/s | 3.6 |
| 1983 | 15.9°C | 13.9°C | 11.9°C | 20.7°C | 10.7°C | 192 mm | 85% | 2.9 m/s | — |
| 1982 | 14.9°C | 12.9°C | 10.9°C | 19.3°C | 9.1°C | 81 mm | 85% | 2.1 m/s | — |
| 1981 | 17.2°C | 14.7°C | 12.2°C | 21.4°C | 10.0°C | 112 mm | 84% | 2.6 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 16.2°C with lows near 12.1°C (mean 14.2°C), based on 45 years of NASA POWER data.
August averages 147 mm of rainfall in Prince Rupert, one of the drier months. The wettest on record was 375 mm in 2020.
The hottest August reached 27.2°C in 1990. The coldest dipped to 8.4°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1.5°C. Daytime highs moved from 15.6°C to 17°C and overnight lows from 11.3°C to 12.9°C over the same span.
August is one of the warmer months of the year in Prince Rupert and one of the drier months, so plan for around 16.2°C daytime highs and 12.1°C at night.
Not quite — August is the 12th coolest month in Prince Rupert, averaging 14.2°C.
For August in Prince Rupert, pack light layers you can adjust through the day, with typical highs of 16.2°C and lows of 12.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 86% — quite humid.
Average wind speed in August is 2.4 m/s. The windiest August on record averaged 3.4 m/s (2020).
The wettest August on record was 2020 with 375 mm. On average, August sees 147 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 Prince Rupert 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.
