May is one of the warmer months of the year in Port Alberni, with average highs near 13.9°C and lows around 6.2°C (mean 10.1°C). It is one of the drier months, averaging 81 mm of rainfall and 82% relative humidity across the period.
May is one of the warmer months of the year in Port Alberni. Across 45 years of records, the warmest Mays in Port Alberni were 2019 and 2023 — when the month averaged 12.9°C — while the coldest was 1984 at 7.5°C. Typical May days reach 13.9°C with nights near 6.2°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Port Alberni, averaging 81 mm of rainfall. The wettest May on record was 1986 with 210 mm, while the driest was 1992 at 21 mm.
Relative humidity in Port Alberni during May averages 82%. The most humid May was 2022 at 86%, and the least humid was 1995 at 76%.
May receives about 5.1 kWh/m²/day of solar energy in Port Alberni. The sunniest May was 2019 at 6.4 kWh/m²/day, and the cloudiest were 1993 and 2022 at 4.3.
Average wind speed in Port Alberni during May is 0.8 m/s. The windiest Mays were 2010, 2020 and 2022, among others at 0.9 m/s, while the calmest were 2015, 2019 and 2023 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.5°C | 10.3°C | 9.7°C | 10.8°C | 10.2°C | +0.7°C |
| Avg High | 13.3°C | 14.2°C | 13.4°C | 14.7°C | 14.0°C | +0.7°C |
| Avg Low | 5.7°C | 6.4°C | 6.0°C | 6.8°C | 6.4°C | +0.7°C |
| Avg Rain | 114 mm | 83 mm | 74 mm | 61 mm | 71 mm | -43 mm |
May temperatures in Port Alberni have risen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -0.3°C (1985) to a record high of 28.3°C (2005).
Rainfall in May is one of the drier months, averaging 81 mm, with a wettest year of 210 mm.
A good time to visit Port Alberni
May is a good time to visit Port Alberni, with days averaging 13.9°C and nights around 6.2°C (mean 10.1°C, warmer than Port Alberni's yearly average) and higher rainfall. August and July 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 | 13.1°C | 9.7°C | 6.2°C | 18.4°C | 2.4°C | 69 mm | 82% | 0.8 m/s | 5.1 |
| 2024 | 14.0°C | 9.9°C | 5.7°C | 23.3°C | 1.9°C | 56 mm | 82% | 0.8 m/s | 5.4 |
| 2023 | 17.7°C | 12.9°C | 8.2°C | 26.5°C | 4.4°C | 38 mm | 80% | 0.6 m/s | 6.3 |
| 2022 | 10.9°C | 7.9°C | 4.9°C | 19.6°C | 1.0°C | 133 mm | 86% | 0.9 m/s | 4.3 |
| 2021 | 13.8°C | 10.0°C | 6.1°C | 20.2°C | 3.2°C | 58 mm | 83% | 0.7 m/s | 5.3 |
| 2020 | 14.3°C | 10.6°C | 7.0°C | 22.2°C | 2.9°C | 70 mm | 82% | 0.9 m/s | 5.2 |
| 2019 🔥 | 17.8°C | 12.9°C | 8.1°C | 23.9°C | 4.6°C | 22 mm | 78% | 0.6 m/s | 6.4 |
| 2018 | 16.8°C | 12.3°C | 7.8°C | 26.3°C | 4.7°C | 25 mm | 81% | 0.7 m/s | 6.2 |
| 2017 | 14.4°C | 10.5°C | 6.7°C | 23.6°C | 3.2°C | 75 mm | 83% | 0.7 m/s | 5.2 |
| 2016 | 15.9°C | 11.6°C | 7.4°C | 21.5°C | 3.7°C | 41 mm | 80% | 0.7 m/s | 5.8 |
| 2015 | 16.6°C | 12.3°C | 8.0°C | 22.6°C | 1.4°C | 24 mm | 82% | 0.6 m/s | 6.1 |
| 2014 | 15.0°C | 11.5°C | 8.0°C | 24.8°C | 5.6°C | 61 mm | 83% | 0.7 m/s | 5 |
| 2013 | 14.4°C | 10.6°C | 6.9°C | 26.2°C | 2.5°C | 90 mm | 83% | 0.7 m/s | 4.8 |
| 2012 | 13.1°C | 9.1°C | 5.0°C | 23.7°C | 1.1°C | 63 mm | 79% | 0.8 m/s | 5.4 |
| 2011 | 11.4°C | 8.2°C | 5.1°C | 16.7°C | 3.1°C | 93 mm | 85% | 0.8 m/s | 4.5 |
| 2010 | 12.0°C | 8.6°C | 5.2°C | 18.4°C | 1.3°C | 115 mm | 84% | 0.9 m/s | 4.5 |
| 2009 | 13.3°C | 9.4°C | 5.4°C | 22.4°C | 1.2°C | 85 mm | 80% | 0.8 m/s | 5.4 |
| 2008 | 13.8°C | 9.9°C | 6.0°C | 21.2°C | 2.4°C | 34 mm | 83% | 0.7 m/s | 4.9 |
| 2007 | 13.7°C | 9.6°C | 5.5°C | 21.4°C | 1.7°C | 54 mm | 80% | 0.8 m/s | 5.4 |
| 2006 | 14.0°C | 10.0°C | 6.0°C | 20.5°C | 0.7°C | 52 mm | 79% | 0.8 m/s | 5.4 |
| 2005 | 15.2°C | 11.7°C | 8.3°C | 28.3°C | 5.6°C | 140 mm | 83% | 0.9 m/s | 4.8 |
| 2004 | 14.8°C | 11.1°C | 7.4°C | 21.2°C | 4.1°C | 40 mm | 82% | 0.7 m/s | 5.3 |
| 2003 | 12.4°C | 9.1°C | 5.8°C | 19.4°C | 1.7°C | 64 mm | 83% | 0.8 m/s | 4.7 |
| 2002 | 12.1°C | 8.5°C | 4.9°C | 19.6°C | -0.2°C | 67 mm | 82% | 0.8 m/s | 5 |
| 2001 | 12.6°C | 8.9°C | 5.2°C | 24.3°C | 2.3°C | 74 mm | 81% | 0.8 m/s | 5.1 |
| 2000 | 11.8°C | 8.5°C | 5.2°C | 18.1°C | 1.8°C | 130 mm | 83% | 0.8 m/s | 4.8 |
| 1999 | 11.4°C | 7.6°C | 3.9°C | 23.3°C | 0.8°C | 87 mm | 82% | 0.8 m/s | 4.8 |
| 1998 | 14.5°C | 10.9°C | 7.2°C | 24.5°C | 3.7°C | 75 mm | 84% | 0.7 m/s | 4.9 |
| 1997 | 15.4°C | 11.5°C | 7.7°C | 21.6°C | 2.3°C | 137 mm | 81% | 0.8 m/s | 5 |
| 1996 | 11.6°C | 8.1°C | 4.7°C | 17.4°C | 0.7°C | 103 mm | 82% | 0.9 m/s | 4.9 |
| 1995 | 16.8°C | 12.0°C | 7.2°C | 23.4°C | 3.3°C | 36 mm | 76% | 0.7 m/s | 5.9 |
| 1994 | 14.3°C | 10.4°C | 6.5°C | 21.7°C | 2.9°C | 71 mm | 80% | 0.8 m/s | 4.8 |
| 1993 | 15.3°C | 11.4°C | 7.6°C | 25.9°C | 3.1°C | 173 mm | 84% | 0.9 m/s | 4.3 |
| 1992 | 16.0°C | 11.6°C | 7.1°C | 24.8°C | 1.5°C | 21 mm | 76% | 0.7 m/s | 5.5 |
| 1991 | 13.3°C | 9.4°C | 5.6°C | 20.1°C | 3.5°C | 66 mm | 84% | 0.8 m/s | 5 |
| 1990 | 13.4°C | 9.9°C | 6.4°C | 21.7°C | 3.4°C | 59 mm | 83% | 0.8 m/s | 4.7 |
| 1989 | 14.1°C | 10.2°C | 6.2°C | 21.5°C | 3.2°C | 54 mm | 80% | 0.7 m/s | 5.3 |
| 1988 | 12.4°C | 8.9°C | 5.4°C | 22.5°C | 1.6°C | 164 mm | 84% | 0.9 m/s | 4.4 |
| 1987 | 14.1°C | 10.0°C | 5.9°C | 24.4°C | 3.1°C | 150 mm | 81% | 0.9 m/s | 5.4 |
| 1986 🌧️ | 12.5°C | 9.1°C | 5.6°C | 25.9°C | 2.2°C | 210 mm | 84% | 0.8 m/s | 4.7 |
| 1985 | 13.6°C | 9.6°C | 5.6°C | 22.4°C | -0.3°C | 51 mm | 81% | 0.7 m/s | 5 |
| 1984 ❄️ | 10.7°C | 7.5°C | 4.4°C | 18.4°C | 2.1°C | 198 mm | 84% | 0.9 m/s | 4.5 |
| 1983 | 16.0°C | 11.4°C | 6.7°C | 25.6°C | 2.1°C | 43 mm | 78% | 0.7 m/s | — |
| 1982 | 13.5°C | 9.3°C | 5.2°C | 21.5°C | 1.4°C | 45 mm | 78% | 0.7 m/s | — |
| 1981 | 12.7°C | 9.3°C | 6.0°C | 20.8°C | 2.4°C | 110 mm | 84% | 0.8 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.9°C with lows near 6.2°C (mean 10.1°C), based on 45 years of NASA POWER data.
May averages 81 mm of rainfall in Port Alberni, one of the drier months. The wettest on record was 210 mm in 1986.
The hottest May reached 28.3°C in 2005. The coldest dipped to -0.3°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.7°C. Daytime highs moved from 13.3°C to 13.9°C and overnight lows from 5.6°C to 6.2°C over the same span.
May is one of the warmer months of the year in Port Alberni and one of the drier months, so plan for around 13.9°C daytime highs and 6.2°C at night.
Not quite — May is the 8th coolest month in Port Alberni, averaging 10.1°C.
For May in Port Alberni, pack warm layers and a jacket for chilly mornings, with typical highs of 13.9°C and lows of 6.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 82% — quite humid.
Average wind speed in May is 0.8 m/s. The windiest May on record averaged 0.9 m/s (1984).
The wettest May on record was 1986 with 210 mm. On average, May sees 81 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 Port Alberni 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.
