May is one of the warmer months of the year in Courtenay, with average highs near 15.4°C and lows around 5.4°C (mean 10.4°C). It is one of the drier months, averaging 57 mm of rainfall and 79% relative humidity across the period.
May is one of the warmer months of the year in Courtenay. Across 45 years of records, the warmest May in Courtenay was 2023 — when the month averaged 14.1°C — while the coldest was 1984 at 7.3°C. Typical May days reach 15.4°C with nights near 5.4°C. The long-term trend is warming, about 0.3°C per decade.
May is one of the drier months in Courtenay, averaging 57 mm of rainfall. The wettest May on record was 1984 with 133 mm, while the driest was 1992 at 19 mm.
Relative humidity in Courtenay during May averages 79%. The most humid May was 2022 at 83%, and the least humid was 2023 at 74%.
May receives about 5.1 kWh/m²/day of solar energy in Courtenay. 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 Courtenay during May is 0.5 m/s. The windiest May was 1988 at 0.6 m/s, while the calmest were 2008, 2015 and 2023 at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.7°C | 10.6°C | 10.0°C | 11.2°C | 10.5°C | +0.8°C |
| Avg High | 14.7°C | 15.7°C | 14.8°C | 16.3°C | 15.5°C | +0.8°C |
| Avg Low | 4.7°C | 5.5°C | 5.1°C | 6.2°C | 5.4°C | +0.7°C |
| Avg Rain | 74 mm | 62 mm | 50 mm | 49 mm | 50 mm | -24 mm |
May temperatures in Courtenay have risen by about 0.8°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -1.8°C (1985) to a record high of 30.2°C (2023).
Rainfall in May is one of the drier months, averaging 57 mm, with a wettest year of 133 mm.
A good time to visit Courtenay
May is a good time to visit Courtenay, with days averaging 15.4°C and nights around 5.4°C (mean 10.4°C, warmer than Courtenay's yearly average) and moderate 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 | 14.8°C | 10.0°C | 5.2°C | 21.8°C | 0.8°C | 50 mm | 79% | 0.5 m/s | 5.1 |
| 2024 | 15.5°C | 10.1°C | 4.7°C | 23.3°C | 0.2°C | 43 mm | 77% | 0.5 m/s | 5.4 |
| 2023 🔥 | 20.1°C | 14.1°C | 8.0°C | 30.2°C | 2.5°C | 37 mm | 74% | 0.4 m/s | 6.3 |
| 2022 | 11.8°C | 7.7°C | 3.6°C | 17.3°C | -0.7°C | 78 mm | 83% | 0.5 m/s | 4.3 |
| 2021 | 15.3°C | 10.2°C | 5.1°C | 21.0°C | 1.7°C | 39 mm | 78% | 0.5 m/s | 5.3 |
| 2020 | 15.6°C | 10.9°C | 6.1°C | 22.8°C | 2.1°C | 50 mm | 79% | 0.5 m/s | 5.2 |
| 2019 | 19.2°C | 13.3°C | 7.4°C | 25.7°C | 3.3°C | 19 mm | 76% | 0.5 m/s | 6.4 |
| 2018 | 18.7°C | 13.1°C | 7.5°C | 26.7°C | 3.2°C | 19 mm | 77% | 0.5 m/s | 6.2 |
| 2017 | 16.2°C | 11.0°C | 5.9°C | 25.5°C | 1.1°C | 61 mm | 80% | 0.5 m/s | 5.2 |
| 2016 | 17.4°C | 12.1°C | 6.8°C | 22.4°C | 2.5°C | 42 mm | 77% | 0.5 m/s | 5.8 |
| 2015 | 18.9°C | 13.3°C | 7.8°C | 24.8°C | 0.9°C | 19 mm | 78% | 0.4 m/s | 6.1 |
| 2014 | 16.4°C | 11.8°C | 7.1°C | 24.2°C | 3.5°C | 52 mm | 80% | 0.5 m/s | 5 |
| 2013 | 15.9°C | 11.2°C | 6.5°C | 25.6°C | 1.7°C | 69 mm | 80% | 0.5 m/s | 4.8 |
| 2012 | 14.1°C | 9.1°C | 4.0°C | 22.1°C | -0.2°C | 44 mm | 77% | 0.5 m/s | 5.4 |
| 2011 | 12.8°C | 8.5°C | 4.3°C | 18.5°C | 1.2°C | 82 mm | 82% | 0.5 m/s | 4.5 |
| 2010 | 13.5°C | 9.0°C | 4.5°C | 20.5°C | -1.4°C | 88 mm | 80% | 0.5 m/s | 4.5 |
| 2009 | 14.6°C | 9.5°C | 4.4°C | 21.1°C | 1.5°C | 62 mm | 78% | 0.5 m/s | 5.4 |
| 2008 | 15.7°C | 10.7°C | 5.6°C | 24.3°C | -0.2°C | 30 mm | 79% | 0.4 m/s | 4.9 |
| 2007 | 15.3°C | 10.2°C | 5.0°C | 24.6°C | 0.2°C | 38 mm | 77% | 0.5 m/s | 5.4 |
| 2006 | 15.4°C | 10.3°C | 5.1°C | 23.4°C | 0.0°C | 33 mm | 76% | 0.5 m/s | 5.4 |
| 2005 | 16.6°C | 12.1°C | 7.6°C | 28.0°C | 3.1°C | 83 mm | 80% | 0.5 m/s | 4.8 |
| 2004 | 16.7°C | 11.7°C | 6.7°C | 23.2°C | 2.0°C | 28 mm | 77% | 0.5 m/s | 5.3 |
| 2003 | 13.7°C | 9.1°C | 4.4°C | 19.3°C | 0.1°C | 49 mm | 80% | 0.5 m/s | 4.7 |
| 2002 | 13.8°C | 9.0°C | 4.2°C | 20.1°C | -0.9°C | 44 mm | 78% | 0.5 m/s | 5 |
| 2001 | 13.6°C | 8.7°C | 3.8°C | 26.1°C | 0.4°C | 49 mm | 80% | 0.5 m/s | 5.1 |
| 2000 | 13.0°C | 8.5°C | 4.0°C | 20.6°C | 1.2°C | 87 mm | 80% | 0.5 m/s | 4.8 |
| 1999 | 12.5°C | 7.7°C | 2.8°C | 22.0°C | -0.8°C | 70 mm | 79% | 0.5 m/s | 4.8 |
| 1998 | 16.7°C | 11.7°C | 6.6°C | 24.8°C | 3.9°C | 55 mm | 80% | 0.5 m/s | 4.9 |
| 1997 | 16.8°C | 11.8°C | 6.7°C | 26.9°C | 0.6°C | 95 mm | 79% | 0.5 m/s | 5 |
| 1996 | 12.9°C | 8.4°C | 3.9°C | 20.0°C | -0.7°C | 75 mm | 80% | 0.5 m/s | 4.9 |
| 1995 | 17.9°C | 12.0°C | 6.1°C | 24.7°C | 1.4°C | 28 mm | 75% | 0.5 m/s | 5.9 |
| 1994 | 15.7°C | 10.6°C | 5.4°C | 21.8°C | 0.9°C | 34 mm | 78% | 0.5 m/s | 4.8 |
| 1993 | 16.6°C | 11.8°C | 7.0°C | 25.8°C | 0.6°C | 123 mm | 81% | 0.5 m/s | 4.3 |
| 1992 | 17.1°C | 11.5°C | 5.9°C | 25.0°C | -0.2°C | 19 mm | 74% | 0.5 m/s | 5.5 |
| 1991 | 15.2°C | 10.0°C | 4.7°C | 21.6°C | 1.0°C | 58 mm | 79% | 0.5 m/s | 5 |
| 1990 | 15.3°C | 10.4°C | 5.5°C | 20.7°C | 2.5°C | 58 mm | 80% | 0.5 m/s | 4.7 |
| 1989 | 15.9°C | 10.8°C | 5.6°C | 22.5°C | 1.1°C | 52 mm | 77% | 0.5 m/s | 5.3 |
| 1988 | 13.6°C | 9.0°C | 4.3°C | 21.6°C | -1.2°C | 92 mm | 81% | 0.6 m/s | 4.4 |
| 1987 | 15.5°C | 10.2°C | 4.8°C | 24.7°C | 2.0°C | 68 mm | 78% | 0.5 m/s | 5.4 |
| 1986 | 13.9°C | 9.2°C | 4.6°C | 28.6°C | 0.7°C | 125 mm | 82% | 0.5 m/s | 4.7 |
| 1985 | 15.4°C | 10.2°C | 5.0°C | 24.1°C | -1.8°C | 43 mm | 78% | 0.5 m/s | 5 |
| 1984 ❄️ 🌧️ | 11.7°C | 7.3°C | 3.0°C | 20.1°C | -0.1°C | 133 mm | 83% | 0.5 m/s | 4.5 |
| 1983 | 17.4°C | 11.5°C | 5.6°C | 29.1°C | 1.3°C | 22 mm | 75% | 0.5 m/s | — |
| 1982 | 14.7°C | 9.4°C | 4.0°C | 22.4°C | -1.3°C | 32 mm | 76% | 0.5 m/s | — |
| 1981 | 14.1°C | 9.6°C | 5.1°C | 20.4°C | 1.8°C | 100 mm | 81% | 0.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15.4°C with lows near 5.4°C (mean 10.4°C), based on 45 years of NASA POWER data.
May averages 57 mm of rainfall in Courtenay, one of the drier months. The wettest on record was 133 mm in 1984.
The hottest May reached 30.2°C in 2023. The coldest dipped to -1.8°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.8°C. Daytime highs moved from 14.7°C to 15.5°C and overnight lows from 4.5°C to 5.3°C over the same span.
May is one of the warmer months of the year in Courtenay and one of the drier months, so plan for around 15.4°C daytime highs and 5.4°C at night.
Not quite — May is the 8th coolest month in Courtenay, averaging 10.4°C.
For May in Courtenay, pack warm layers and a jacket for chilly mornings, with typical highs of 15.4°C and lows of 5.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 79% — quite humid.
Average wind speed in May is 0.5 m/s. The windiest May on record averaged 0.6 m/s (1988).
The wettest May on record was 1984 with 133 mm. On average, May sees 57 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 Courtenay 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.
