August is one of the warmer months of the year in Whitehorse, with average highs near 13.7°C and lows around 4.2°C (mean 9°C). It is a relatively wet time of year, averaging 65 mm of rainfall and 79% relative humidity across the period.
August is one of the warmer months of the year in Whitehorse. Across 45 years of records, the warmest August in Whitehorse was 1994 — when the month averaged 13.5°C — while the coldest was 1986 at 6.7°C. Typical August days reach 13.7°C with nights near 4.2°C. The long-term trend is warming, about 0.3°C per decade.
August is a relatively wet time of year in Whitehorse, averaging 65 mm of rainfall. The wettest August on record was 2009 with 123 mm, while the driest was 1994 at 20 mm.
Relative humidity in Whitehorse during August averages 79%. The most humid August was 2020 at 86%, and the least humid were 1994 and 2004 at 70%.
August receives about 4.1 kWh/m²/day of solar energy in Whitehorse. The sunniest Augusts were 1989 and 1994 at 4.6 kWh/m²/day, and the cloudiest was 2020 at 3.4.
Average wind speed in Whitehorse during August is 1.3 m/s. The windiest Augusts were 1981 and 2018 at 1.6 m/s, while the calmest was 2004 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.4°C | 9.2°C | 8.8°C | 9.0°C | 9.6°C | +1.2°C |
| Avg High | 13.3°C | 14.1°C | 13.5°C | 13.6°C | 14.2°C | +0.9°C |
| Avg Low | 3.5°C | 4.3°C | 4.2°C | 4.4°C | 5.0°C | +1.5°C |
| Avg Rain | 61 mm | 55 mm | 71 mm | 71 mm | 69 mm | +8 mm |
August temperatures in Whitehorse have risen by about 2.1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of -4.9°C (1984) to a record high of 25.1°C (1994).
Rainfall in August is a relatively wet time of year, averaging 65 mm, with a wettest year of 123 mm.
One of the best times to visit Whitehorse
August is one of the best times to visit Whitehorse. Expect days averaging 13.7°C and nights around 4.2°C (mean 9°C) — warmer than Whitehorse's yearly average — with moderate rainfall (65 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 | 15.5°C | 10.5°C | 5.5°C | 19.7°C | 3.8°C | 46 mm | 79% | 1.2 m/s | 4.3 |
| 2024 | 14.3°C | 9.3°C | 4.3°C | 22.3°C | -0.3°C | 57 mm | 79% | 1.4 m/s | 4.2 |
| 2023 | 16.8°C | 11.7°C | 6.6°C | 22.9°C | 3.0°C | 43 mm | 77% | 1.3 m/s | 4.4 |
| 2022 | 14.1°C | 9.6°C | 5.2°C | 19.7°C | 1.4°C | 66 mm | 84% | 1.3 m/s | 4.1 |
| 2021 | 12.8°C | 8.8°C | 4.8°C | 22.8°C | 1.1°C | 98 mm | 84% | 1.4 m/s | 3.6 |
| 2020 | 11.4°C | 7.6°C | 3.8°C | 15.4°C | 0.7°C | 103 mm | 86% | 1.2 m/s | 3.4 |
| 2019 | 13.7°C | 8.9°C | 4.2°C | 22.6°C | -2.6°C | 87 mm | 77% | 1.1 m/s | 4.1 |
| 2018 | 13.8°C | 9.3°C | 4.7°C | 23.5°C | 0.1°C | 74 mm | 79% | 1.6 m/s | 3.9 |
| 2017 | 14.5°C | 9.6°C | 4.8°C | 23.2°C | -0.2°C | 48 mm | 79% | 1.3 m/s | 4.4 |
| 2016 | 14.0°C | 9.5°C | 5.1°C | 19.5°C | -0.1°C | 69 mm | 81% | 1.4 m/s | 3.8 |
| 2015 | 12.1°C | 8.1°C | 4.1°C | 20.2°C | -3.2°C | 107 mm | 81% | 1.3 m/s | 3.7 |
| 2014 | 12.8°C | 8.4°C | 4.1°C | 19.0°C | 0.2°C | 61 mm | 83% | 1.3 m/s | 3.8 |
| 2013 | 15.5°C | 10.9°C | 6.2°C | 22.4°C | 1.2°C | 53 mm | 79% | 1.1 m/s | 4.4 |
| 2012 | 13.8°C | 8.8°C | 3.8°C | 18.2°C | -1.0°C | 78 mm | 80% | 1.3 m/s | 4.3 |
| 2011 | 11.3°C | 6.9°C | 2.5°C | 15.2°C | -0.2°C | 92 mm | 82% | 1.3 m/s | 3.6 |
| 2010 | 14.9°C | 9.9°C | 4.8°C | 24.6°C | 0.2°C | 41 mm | 75% | 1.2 m/s | 4.2 |
| 2009 🌧️ | 13.3°C | 8.9°C | 4.6°C | 21.5°C | 0.8°C | 123 mm | 81% | 1.3 m/s | 3.5 |
| 2008 | 12.2°C | 7.8°C | 3.4°C | 18.5°C | 0.3°C | 68 mm | 83% | 1.2 m/s | 3.8 |
| 2007 | 14.7°C | 9.7°C | 4.8°C | 20.2°C | 0.7°C | 46 mm | 77% | 1.1 m/s | 4.5 |
| 2006 | 11.6°C | 7.2°C | 2.9°C | 14.7°C | 0.4°C | 72 mm | 82% | 1.4 m/s | 3.7 |
| 2005 | 14.4°C | 9.9°C | 5.3°C | 24.5°C | 1.0°C | 65 mm | 79% | 1.2 m/s | 3.8 |
| 2004 | 17.1°C | 11.8°C | 6.5°C | 24.6°C | 1.5°C | 47 mm | 70% | 1 m/s | 4.5 |
| 2003 | 13.2°C | 8.2°C | 3.2°C | 21.0°C | -1.4°C | 56 mm | 75% | 1.4 m/s | 4.3 |
| 2002 | 12.8°C | 8.0°C | 3.3°C | 19.4°C | -0.7°C | 69 mm | 79% | 1.5 m/s | 3.9 |
| 2001 | 14.4°C | 9.5°C | 4.7°C | 19.9°C | 1.6°C | 53 mm | 80% | 1.2 m/s | 4.4 |
| 2000 | 11.3°C | 7.2°C | 3.1°C | 20.2°C | -0.5°C | 110 mm | 83% | 1.2 m/s | 4 |
| 1999 | 14.7°C | 9.8°C | 5.0°C | 24.6°C | -1.4°C | 60 mm | 75% | 1.2 m/s | 4 |
| 1998 | 13.2°C | 7.9°C | 2.6°C | 19.7°C | -2.9°C | 57 mm | 74% | 1.5 m/s | 4.5 |
| 1997 | 15.3°C | 10.5°C | 5.7°C | 19.5°C | 2.2°C | 45 mm | 76% | 1.3 m/s | 4.4 |
| 1996 | 12.3°C | 7.6°C | 2.9°C | 16.9°C | 0.9°C | 74 mm | 78% | 1.3 m/s | 3.9 |
| 1995 | 12.9°C | 8.4°C | 3.9°C | 16.7°C | 0.4°C | 59 mm | 76% | 1.2 m/s | 4 |
| 1994 🔥 | 19.0°C | 13.5°C | 8.1°C | 25.1°C | 1.4°C | 20 mm | 70% | 1.1 m/s | 4.6 |
| 1993 | 13.8°C | 9.0°C | 4.1°C | 20.2°C | -0.2°C | 40 mm | 78% | 1.3 m/s | 4.3 |
| 1992 | 12.6°C | 7.7°C | 2.8°C | 17.6°C | -1.2°C | 38 mm | 80% | 1.3 m/s | 4.3 |
| 1991 | 11.8°C | 7.3°C | 2.9°C | 20.6°C | -4.2°C | 115 mm | 83% | 1.4 m/s | 3.6 |
| 1990 | 15.1°C | 10.0°C | 5.0°C | 24.8°C | -1.7°C | 41 mm | 75% | 1.3 m/s | 4.3 |
| 1989 | 17.2°C | 11.7°C | 6.2°C | 23.7°C | 2.4°C | 54 mm | 72% | 1.1 m/s | 4.6 |
| 1988 | 12.8°C | 8.3°C | 3.8°C | 18.7°C | -0.3°C | 52 mm | 81% | 1.3 m/s | 4 |
| 1987 | 13.7°C | 8.8°C | 3.9°C | 19.3°C | -3.5°C | 74 mm | 77% | 1.2 m/s | 4 |
| 1986 ❄️ | 11.5°C | 6.7°C | 1.8°C | 16.5°C | -3.9°C | 68 mm | 80% | 1.4 m/s | 3.9 |
| 1985 | 12.2°C | 7.3°C | 2.5°C | 18.4°C | -2.0°C | 35 mm | 76% | 1.3 m/s | 4.3 |
| 1984 | 13.2°C | 8.0°C | 2.8°C | 23.3°C | -4.9°C | 81 mm | 75% | 1.3 m/s | 4.1 |
| 1983 | 12.0°C | 7.3°C | 2.7°C | 17.3°C | -0.6°C | 58 mm | 79% | 1.4 m/s | — |
| 1982 | 13.4°C | 8.4°C | 3.5°C | 21.1°C | 0.0°C | 68 mm | 74% | 1.1 m/s | — |
| 1981 | 13.4°C | 8.7°C | 4.0°C | 20.3°C | -0.7°C | 59 mm | 80% | 1.6 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 13.7°C with lows near 4.2°C (mean 9°C), based on 45 years of NASA POWER data.
August averages 65 mm of rainfall in Whitehorse, a relatively wet time of year. The wettest on record was 123 mm in 2009.
The hottest August reached 25.1°C in 1994. The coldest dipped to -4.9°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2.1°C. Daytime highs moved from 12.8°C to 14.7°C and overnight lows from 3.1°C to 5.3°C over the same span.
August is one of the warmer months of the year in Whitehorse and a relatively wet time of year, so plan for around 13.7°C daytime highs and 4.2°C at night.
Not quite — August is the 11th coolest month in Whitehorse, averaging 9°C.
For August in Whitehorse, pack warm layers and a jacket for chilly mornings, with typical highs of 13.7°C and lows of 4.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 79% — quite humid.
Average wind speed in August is 1.3 m/s. The windiest August on record averaged 1.6 m/s (1981).
The wettest August on record was 2009 with 123 mm. On average, August sees 65 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 Whitehorse 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.
