May is one of the warmer months of the year in Coquitlam, with average highs near 13.5°C and lows around 4.8°C (mean 9.2°C). It is one of the drier months, averaging 121 mm of rainfall and 80% relative humidity across the period.
May is one of the warmer months of the year in Coquitlam. Across 45 years of records, the warmest May in Coquitlam was 2023 — when the month averaged 12.8°C — while the coldest was 1999 at 5.6°C. Typical May days reach 13.5°C with nights near 4.8°C. The long-term trend is warming, about 0.4°C per decade.
May is one of the drier months in Coquitlam, averaging 121 mm of rainfall. The wettest May on record was 1984 with 234 mm, while the driest was 2018 at 27 mm.
Relative humidity in Coquitlam during May averages 80%. The most humid May was 2022 at 86%, and the least humid was 1995 at 71%.
May receives about 5.1 kWh/m²/day of solar energy in Coquitlam. The sunniest May was 2018 at 6.1 kWh/m²/day, and the cloudiest were 2011 and 2022 at 4.2.
Average wind speed in Coquitlam during May is 0.3 m/s. The windiest Mays were 2019, 2020 and 2021, among others at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.3°C | 9.3°C | 8.8°C | 10.0°C | 9.2°C | +0.9°C |
| Avg High | 12.6°C | 13.7°C | 13.1°C | 14.5°C | 13.4°C | +0.8°C |
| Avg Low | 4.0°C | 5.0°C | 4.4°C | 5.5°C | 5.0°C | +1°C |
| Avg Rain | 143 mm | 114 mm | 125 mm | 104 mm | 120 mm | -24 mm |
May temperatures in Coquitlam have risen by about 0.9°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -5.4°C (1999) to a record high of 33.6°C (1983).
Rainfall in May is one of the drier months, averaging 121 mm, with a wettest year of 234 mm.
A good time to visit Coquitlam
May is a good time to visit Coquitlam, with days averaging 13.5°C and nights around 4.8°C (mean 9.2°C, warmer than Coquitlam'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 | 12.1°C | 8.4°C | 4.6°C | 22.9°C | -0.1°C | 114 mm | 82% | 0.3 m/s | 5.1 |
| 2024 | 12.6°C | 8.5°C | 4.4°C | 22.5°C | -0.4°C | 133 mm | 83% | 0.3 m/s | 5 |
| 2023 🔥 | 17.7°C | 12.8°C | 7.9°C | 26.9°C | 1.4°C | 58 mm | 79% | 0.3 m/s | 5.7 |
| 2022 | 10.2°C | 6.7°C | 3.3°C | 17.9°C | 0.0°C | 193 mm | 86% | 0.3 m/s | 4.2 |
| 2021 | 13.4°C | 8.7°C | 4.1°C | 20.8°C | 0.1°C | 83 mm | 78% | 0.4 m/s | 5.3 |
| 2020 | 14.3°C | 10.0°C | 5.7°C | 22.5°C | -1.7°C | 137 mm | 81% | 0.4 m/s | 5.2 |
| 2019 | 17.5°C | 12.5°C | 7.5°C | 24.0°C | 3.2°C | 69 mm | 77% | 0.4 m/s | 5.7 |
| 2018 | 17.2°C | 12.2°C | 7.3°C | 27.1°C | 2.1°C | 27 mm | 77% | 0.4 m/s | 6.1 |
| 2017 | 15.0°C | 9.9°C | 4.8°C | 27.7°C | -1.7°C | 122 mm | 77% | 0.3 m/s | 5.3 |
| 2016 | 15.5°C | 10.9°C | 6.4°C | 23.3°C | 2.5°C | 91 mm | 77% | 0.4 m/s | 5.3 |
| 2015 | 17.1°C | 12.4°C | 7.6°C | 23.2°C | -1.0°C | 38 mm | 76% | 0.3 m/s | 5.8 |
| 2014 | 13.8°C | 10.1°C | 6.4°C | 22.0°C | 1.6°C | 137 mm | 82% | 0.3 m/s | 5.1 |
| 2013 | 14.4°C | 10.0°C | 5.6°C | 24.7°C | -2.0°C | 144 mm | 79% | 0.3 m/s | 5.1 |
| 2012 | 12.2°C | 7.8°C | 3.4°C | 22.0°C | -1.9°C | 99 mm | 78% | 0.4 m/s | 5.4 |
| 2011 | 10.5°C | 6.6°C | 2.6°C | 17.9°C | -2.7°C | 177 mm | 85% | 0.3 m/s | 4.2 |
| 2010 | 11.3°C | 7.1°C | 3.0°C | 18.6°C | -3.0°C | 140 mm | 80% | 0.3 m/s | 4.9 |
| 2009 | 13.5°C | 8.8°C | 4.1°C | 21.8°C | -0.7°C | 150 mm | 77% | 0.4 m/s | 5.5 |
| 2008 | 13.6°C | 8.9°C | 4.3°C | 23.4°C | -2.7°C | 87 mm | 81% | 0.3 m/s | 4.8 |
| 2007 | 13.4°C | 8.7°C | 4.0°C | 24.8°C | -0.8°C | 78 mm | 77% | 0.3 m/s | 5.5 |
| 2006 | 14.1°C | 9.5°C | 4.9°C | 24.2°C | -1.2°C | 119 mm | 77% | 0.4 m/s | 5.3 |
| 2005 | 15.4°C | 11.0°C | 6.7°C | 28.1°C | 3.7°C | 126 mm | 80% | 0.4 m/s | 4.9 |
| 2004 | 14.3°C | 10.3°C | 6.3°C | 27.3°C | 2.1°C | 132 mm | 80% | 0.3 m/s | 5 |
| 2003 | 12.2°C | 8.1°C | 4.0°C | 21.3°C | -1.3°C | 93 mm | 80% | 0.4 m/s | 4.9 |
| 2002 | 11.1°C | 6.9°C | 2.6°C | 19.1°C | -4.0°C | 114 mm | 81% | 0.4 m/s | 4.8 |
| 2001 | 12.5°C | 8.2°C | 4.0°C | 25.5°C | -1.9°C | 138 mm | 78% | 0.4 m/s | 5.2 |
| 2000 | 10.8°C | 7.2°C | 3.5°C | 17.4°C | -3.6°C | 214 mm | 84% | 0.3 m/s | 4.5 |
| 1999 ❄️ | 9.6°C | 5.6°C | 1.5°C | 21.3°C | -5.4°C | 140 mm | 83% | 0.3 m/s | 5 |
| 1998 | 14.2°C | 9.9°C | 5.6°C | 24.0°C | 1.3°C | 109 mm | 82% | 0.3 m/s | 5.1 |
| 1997 | 14.8°C | 10.5°C | 6.2°C | 21.7°C | -2.9°C | 181 mm | 77% | 0.4 m/s | 5.1 |
| 1996 | 10.1°C | 6.6°C | 3.2°C | 17.9°C | -2.5°C | 171 mm | 85% | 0.3 m/s | 4.9 |
| 1995 | 16.4°C | 11.3°C | 6.2°C | 22.3°C | 0.5°C | 49 mm | 71% | 0.4 m/s | 6 |
| 1994 | 14.3°C | 9.8°C | 5.3°C | 22.9°C | 0.3°C | 87 mm | 78% | 0.4 m/s | 4.9 |
| 1993 | 16.8°C | 11.9°C | 7.0°C | 30.4°C | 1.0°C | 145 mm | 79% | 0.3 m/s | 5 |
| 1992 | 15.7°C | 10.8°C | 5.9°C | 25.4°C | 0.2°C | 37 mm | 73% | 0.4 m/s | 5.6 |
| 1991 | 12.3°C | 8.4°C | 4.5°C | 20.3°C | 1.0°C | 113 mm | 83% | 0.3 m/s | 4.7 |
| 1990 | 12.4°C | 8.5°C | 4.6°C | 21.6°C | 0.4°C | 110 mm | 83% | 0.3 m/s | 4.6 |
| 1989 | 13.2°C | 8.8°C | 4.4°C | 20.1°C | -0.1°C | 154 mm | 81% | 0.3 m/s | 4.9 |
| 1988 | 12.3°C | 7.8°C | 3.3°C | 22.6°C | -2.0°C | 206 mm | 81% | 0.4 m/s | 4.4 |
| 1987 | 13.9°C | 9.3°C | 4.7°C | 24.7°C | 1.4°C | 187 mm | 78% | 0.4 m/s | 5.3 |
| 1986 | 12.2°C | 8.1°C | 4.0°C | 28.5°C | -2.4°C | 192 mm | 80% | 0.4 m/s | 4.5 |
| 1985 | 13.3°C | 8.8°C | 4.2°C | 22.2°C | -1.9°C | 91 mm | 79% | 0.4 m/s | 4.7 |
| 1984 🌧️ | 9.2°C | 5.8°C | 2.4°C | 19.2°C | -0.5°C | 234 mm | 85% | 0.3 m/s | 4.3 |
| 1983 | 15.8°C | 10.7°C | 5.6°C | 33.6°C | 0.7°C | 63 mm | 76% | 0.4 m/s | — |
| 1982 | 10.9°C | 6.8°C | 2.6°C | 20.5°C | -5.2°C | 51 mm | 79% | 0.4 m/s | — |
| 1981 | 12.5°C | 8.5°C | 4.5°C | 20.6°C | -0.1°C | 113 mm | 82% | 0.3 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 13.5°C with lows near 4.8°C (mean 9.2°C), based on 45 years of NASA POWER data.
May averages 121 mm of rainfall in Coquitlam, one of the drier months. The wettest on record was 234 mm in 1984.
The hottest May reached 33.6°C in 1983. The coldest dipped to -5.4°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.9°C. Daytime highs moved from 12.3°C to 13.2°C and overnight lows from 3.9°C to 4.9°C over the same span.
May is one of the warmer months of the year in Coquitlam and one of the drier months, so plan for around 13.5°C daytime highs and 4.8°C at night.
Not quite — May is the 8th coolest month in Coquitlam, averaging 9.2°C.
For May in Coquitlam, pack warm layers and a jacket for chilly mornings, with typical highs of 13.5°C and lows of 4.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 80% — quite humid.
Average wind speed in May is 0.3 m/s. The windiest May on record averaged 0.4 m/s (1982).
The wettest May on record was 1984 with 234 mm. On average, May sees 121 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 Coquitlam 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.
