May is one of the warmer months of the year in Whitehorse, with average highs near 6.9°C and lows around -2°C (mean 2.5°C). It is about average for rainfall, averaging 40 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Whitehorse. Across 45 years of records, the warmest May in Whitehorse was 2015 — when the month averaged 6.7°C — while the coldest was 1985 at -0.8°C. Typical May days reach 6.9°C with nights near -2°C. The long-term trend is warming, about 0.3°C per decade.
May is about average for rainfall in Whitehorse, averaging 40 mm of rainfall. The wettest May on record was 1988 with 82 mm, while the driest was 2007 at 16 mm.
Relative humidity in Whitehorse during May averages 79%. The most humid May was 2021 at 85%, and the least humid was 1996 at 72%.
May receives about 5.3 kWh/m²/day of solar energy in Whitehorse. The sunniest May was 2022 at 6.2 kWh/m²/day, and the cloudiest was 1999 at 4.6.
Average wind speed in Whitehorse during May is 1.4 m/s. The windiest Mays were 1998 and 2012 at 1.7 m/s, while the calmest were 2015 and 2022 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.6°C | 2.7°C | 2.0°C | 3.7°C | 2.0°C | +0.4°C |
| Avg High | 6.0°C | 7.4°C | 6.5°C | 8.1°C | 6.3°C | +0.3°C |
| Avg Low | -2.9°C | -1.9°C | -2.6°C | -0.8°C | -2.2°C | +0.7°C |
| Avg Rain | 42 mm | 34 mm | 36 mm | 43 mm | 50 mm | +8 mm |
May temperatures in Whitehorse have stayed relatively stable across the record.
May has ranged from a record low of -15.7°C (2002) to a record high of 25.2°C (1983).
Rainfall in May is about average for rainfall, averaging 40 mm, with a wettest year of 82 mm.
A good time to visit Whitehorse
May is a good time to visit Whitehorse, with days averaging 6.9°C and nights around -2°C (mean 2.5°C, warmer than Whitehorse's yearly average) and moderate rainfall. July and August are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 4.8°C | 0.7°C | -3.3°C | 8.2°C | -7.1°C | 46 mm | 83% | 1.6 m/s | 4.8 |
| 2024 | 6.2°C | 1.8°C | -2.6°C | 10.1°C | -5.3°C | 61 mm | 80% | 1.6 m/s | 4.8 |
| 2023 | 7.8°C | 3.0°C | -1.7°C | 19.3°C | -7.4°C | 21 mm | 78% | 1.5 m/s | 5.8 |
| 2022 | 5.0°C | 1.1°C | -2.7°C | 16.8°C | -6.0°C | 42 mm | 82% | 1.1 m/s | 6.2 |
| 2021 | 5.2°C | 1.5°C | -2.2°C | 10.1°C | -6.3°C | 77 mm | 85% | 1.5 m/s | 4.7 |
| 2020 | 8.7°C | 4.1°C | -0.5°C | 15.2°C | -3.9°C | 53 mm | 79% | 1.3 m/s | 5.3 |
| 2019 | 10.3°C | 5.3°C | 0.4°C | 17.8°C | -4.1°C | 44 mm | 77% | 1.5 m/s | 5.1 |
| 2018 | 6.9°C | 2.6°C | -1.7°C | 15.1°C | -7.5°C | 37 mm | 79% | 1.6 m/s | 5.2 |
| 2017 | 7.5°C | 3.2°C | -1.1°C | 15.5°C | -5.2°C | 46 mm | 77% | 1.6 m/s | 5.1 |
| 2016 | 9.1°C | 4.6°C | 0.0°C | 16.6°C | -7.0°C | 51 mm | 78% | 1.5 m/s | 5.2 |
| 2015 🔥 | 11.7°C | 6.7°C | 1.6°C | 18.8°C | -6.2°C | 18 mm | 74% | 1.1 m/s | 5.8 |
| 2014 | 9.1°C | 4.2°C | -0.7°C | 14.0°C | -4.5°C | 38 mm | 78% | 1.3 m/s | 5.4 |
| 2013 | 6.4°C | 2.3°C | -1.9°C | 18.0°C | -9.9°C | 46 mm | 83% | 1.5 m/s | 5.6 |
| 2012 | 4.1°C | 0.5°C | -3.1°C | 9.9°C | -7.8°C | 48 mm | 83% | 1.7 m/s | 5.1 |
| 2011 | 7.9°C | 3.6°C | -0.8°C | 18.7°C | -6.9°C | 64 mm | 79% | 1.2 m/s | 5 |
| 2010 | 8.2°C | 3.6°C | -1.0°C | 17.0°C | -6.6°C | 36 mm | 76% | 1.2 m/s | 5.8 |
| 2009 | 7.0°C | 2.4°C | -2.3°C | 14.1°C | -5.0°C | 22 mm | 76% | 1.4 m/s | 5.6 |
| 2008 | 6.8°C | 2.1°C | -2.5°C | 18.5°C | -8.0°C | 28 mm | 81% | 1.5 m/s | 5.1 |
| 2007 | 5.9°C | 1.4°C | -3.1°C | 14.0°C | -7.8°C | 16 mm | 81% | 1.4 m/s | 5.2 |
| 2006 | 5.1°C | 0.8°C | -3.5°C | 12.6°C | -11.1°C | 55 mm | 83% | 1.4 m/s | 4.9 |
| 2005 | 10.4°C | 5.2°C | 0.0°C | 14.7°C | -5.1°C | 44 mm | 77% | 1.3 m/s | 5.8 |
| 2004 | 9.0°C | 4.1°C | -0.7°C | 15.3°C | -5.9°C | 34 mm | 78% | 1.4 m/s | 5.2 |
| 2003 | 6.1°C | 1.7°C | -2.7°C | 11.0°C | -7.1°C | 26 mm | 74% | 1.6 m/s | 5.2 |
| 2002 | 6.1°C | 1.2°C | -3.6°C | 18.1°C | -15.7°C | 35 mm | 78% | 1.6 m/s | 5.8 |
| 2001 | 3.7°C | -0.2°C | -4.2°C | 9.8°C | -10.8°C | 50 mm | 82% | 1.5 m/s | 5.3 |
| 2000 | 4.9°C | 0.8°C | -3.2°C | 11.1°C | -6.9°C | 48 mm | 81% | 1.2 m/s | 5.3 |
| 1999 | 3.9°C | 0.0°C | -3.8°C | 7.9°C | -9.7°C | 54 mm | 81% | 1.4 m/s | 4.6 |
| 1998 | 8.3°C | 3.3°C | -1.6°C | 20.6°C | -7.3°C | 18 mm | 76% | 1.7 m/s | 5.3 |
| 1997 | 8.1°C | 3.1°C | -1.8°C | 16.9°C | -7.2°C | 27 mm | 76% | 1.5 m/s | 5.2 |
| 1996 | 6.7°C | 2.2°C | -2.3°C | 14.8°C | -7.7°C | 25 mm | 72% | 1.3 m/s | 5.5 |
| 1995 | 10.5°C | 5.2°C | -0.2°C | 19.9°C | -4.4°C | 18 mm | 73% | 1.6 m/s | 5.5 |
| 1994 | 6.5°C | 2.0°C | -2.5°C | 13.6°C | -6.8°C | 33 mm | 78% | 1.6 m/s | 5.4 |
| 1993 | 10.1°C | 4.9°C | -0.3°C | 19.6°C | -6.5°C | 31 mm | 78% | 1.3 m/s | 5.4 |
| 1992 | 3.3°C | -0.4°C | -4.1°C | 7.7°C | -8.1°C | 46 mm | 82% | 1.5 m/s | 5.2 |
| 1991 | 7.4°C | 2.7°C | -1.9°C | 11.9°C | -6.2°C | 30 mm | 78% | 1.6 m/s | 5.3 |
| 1990 | 9.0°C | 4.4°C | -0.2°C | 16.0°C | -7.1°C | 56 mm | 78% | 1.4 m/s | 4.8 |
| 1989 | 9.0°C | 4.0°C | -0.9°C | 15.1°C | -5.1°C | 25 mm | 75% | 1.6 m/s | 5.3 |
| 1988 🌧️ | 6.4°C | 2.2°C | -2.0°C | 11.5°C | -7.1°C | 82 mm | 80% | 1.4 m/s | 5.2 |
| 1987 | 5.2°C | 0.8°C | -3.6°C | 12.0°C | -9.0°C | 47 mm | 83% | 1.4 m/s | 5.1 |
| 1986 | 3.6°C | -0.3°C | -4.2°C | 8.8°C | -7.7°C | 44 mm | 84% | 1.3 m/s | 5.1 |
| 1985 ❄️ | 3.7°C | -0.8°C | -5.3°C | 11.0°C | -12.7°C | 38 mm | 85% | 1.5 m/s | 5.4 |
| 1984 | 6.1°C | 1.9°C | -2.3°C | 10.7°C | -6.2°C | 32 mm | 76% | 1.3 m/s | 5.5 |
| 1983 | 7.6°C | 2.9°C | -1.7°C | 25.2°C | -6.0°C | 31 mm | 78% | 1.6 m/s | — |
| 1982 | 3.4°C | -0.7°C | -4.8°C | 14.6°C | -11.2°C | 37 mm | 84% | 1.3 m/s | — |
| 1981 | 9.0°C | 4.0°C | -1.0°C | 17.0°C | -5.9°C | 38 mm | 80% | 1.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 6.9°C with lows near -2°C (mean 2.5°C), based on 45 years of NASA POWER data.
May averages 40 mm of rainfall in Whitehorse, about average for rainfall. The wettest on record was 82 mm in 1988.
The hottest May reached 25.2°C in 1983. The coldest dipped to -15.7°C in 2002.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from -3°C to -2.5°C while daytime highs eased from 6°C to 5.8°C, narrowing the gap between day and night.
May is one of the warmer months of the year in Whitehorse and about average for rainfall, so plan for around 6.9°C daytime highs and -2°C at night.
Not quite — May is the 8th coolest month in Whitehorse, averaging 2.5°C.
For May in Whitehorse, pack warm layers and a jacket for chilly mornings, with typical highs of 6.9°C and lows of -2°C.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 1.4 m/s. The windiest May on record averaged 1.7 m/s (1998).
The wettest May on record was 1988 with 82 mm. On average, May sees 40 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 May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
