May is one of the warmer months of the year in Grande Prairie, with average highs near 15.5°C and lows around 3.3°C (mean 9.4°C). It is about average for rainfall, averaging 60 mm of rainfall and 68% relative humidity across the period.
May is one of the warmer months of the year in Grande Prairie. Across 45 years of records, the warmest May in Grande Prairie was 2023 — when the month averaged 14.5°C — while the coldest was 1996 at 5.9°C. Typical May days reach 15.5°C with nights near 3.3°C. The long-term trend is warming, about 0.2°C per decade.
May is about average for rainfall in Grande Prairie, averaging 60 mm of rainfall. The wettest May on record was 2017 with 96 mm, while the driest was 2025 at 26 mm.
Relative humidity in Grande Prairie during May averages 68%. The most humid May was 2020 at 75%, and the least humid was 2012 at 62%.
May receives about 5.6 kWh/m²/day of solar energy in Grande Prairie. The sunniest May was 2015 at 6.4 kWh/m²/day, and the cloudiest was 1984 at 5.
Average wind speed in Grande Prairie during May is 1 m/s. The windiest May was 2001 at 1.2 m/s, while the calmest were 1986 and 2021 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.3°C | 9.5°C | 8.5°C | 9.9°C | 9.9°C | +0.6°C |
| Avg High | 15.5°C | 15.6°C | 14.4°C | 16.1°C | 15.9°C | +0.4°C |
| Avg Low | 3.1°C | 3.4°C | 2.6°C | 3.7°C | 3.9°C | +0.8°C |
| Avg Rain | 54 mm | 65 mm | 61 mm | 55 mm | 68 mm | +14 mm |
May temperatures in Grande Prairie have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -8.5°C (1996) to a record high of 30°C (2023).
Rainfall in May is about average for rainfall, averaging 60 mm, with a wettest year of 96 mm.
A good time to visit Grande Prairie
May is a good time to visit Grande Prairie, with days averaging 15.5°C and nights around 3.3°C (mean 9.4°C, warmer than Grande Prairie'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 | 17.7°C | 11.1°C | 4.6°C | 28.0°C | -1.3°C | 26 mm | 65% | 0.9 m/s | 5.6 |
| 2024 | 15.2°C | 9.3°C | 3.5°C | 24.3°C | -1.8°C | 65 mm | 66% | 1 m/s | 5.3 |
| 2023 🔥 | 21.1°C | 14.5°C | 7.9°C | 30.0°C | 2.8°C | 81 mm | 67% | 0.9 m/s | 5.8 |
| 2022 | 12.2°C | 6.9°C | 1.5°C | 17.7°C | -4.1°C | 60 mm | 73% | 1 m/s | 5.1 |
| 2021 | 14.7°C | 8.9°C | 3.1°C | 22.2°C | -1.8°C | 82 mm | 74% | 0.8 m/s | 5.4 |
| 2020 | 14.5°C | 8.7°C | 2.9°C | 22.4°C | -3.3°C | 94 mm | 75% | 1 m/s | 5.3 |
| 2019 | 15.9°C | 9.6°C | 3.3°C | 25.9°C | -5.2°C | 39 mm | 70% | 0.9 m/s | 5.4 |
| 2018 | 18.7°C | 12.3°C | 5.9°C | 27.6°C | 2.1°C | 37 mm | 70% | 1 m/s | 6.3 |
| 2017 🌧️ | 16.9°C | 11.0°C | 5.0°C | 25.9°C | -0.7°C | 96 mm | 73% | 1 m/s | 5.8 |
| 2016 | 17.0°C | 10.4°C | 3.7°C | 27.8°C | -1.9°C | 85 mm | 63% | 1 m/s | 5.8 |
| 2015 | 16.9°C | 10.2°C | 3.4°C | 25.1°C | -3.2°C | 47 mm | 67% | 1 m/s | 6.4 |
| 2014 | 14.3°C | 8.4°C | 2.6°C | 20.1°C | -4.7°C | 38 mm | 70% | 0.9 m/s | 5.7 |
| 2013 | 17.7°C | 11.2°C | 4.7°C | 25.0°C | -4.3°C | 43 mm | 68% | 1 m/s | 5.9 |
| 2012 | 15.0°C | 8.8°C | 2.6°C | 22.4°C | -4.3°C | 34 mm | 62% | 1 m/s | 5.9 |
| 2011 | 15.6°C | 9.7°C | 3.9°C | 21.7°C | -0.5°C | 50 mm | 71% | 1 m/s | 5.5 |
| 2010 | 13.1°C | 7.6°C | 2.0°C | 21.5°C | -3.9°C | 81 mm | 65% | 0.9 m/s | 5.4 |
| 2009 | 13.5°C | 7.4°C | 1.4°C | 24.0°C | -4.6°C | 52 mm | 67% | 1.1 m/s | 5.6 |
| 2008 | 15.8°C | 9.7°C | 3.6°C | 27.9°C | -2.2°C | 59 mm | 71% | 1 m/s | 5.5 |
| 2007 | 14.4°C | 8.6°C | 2.8°C | 23.7°C | -1.9°C | 93 mm | 70% | 1 m/s | 5.4 |
| 2006 | 17.2°C | 11.0°C | 4.7°C | 28.0°C | -1.5°C | 57 mm | 63% | 1 m/s | 5.6 |
| 2005 | 16.4°C | 10.2°C | 4.0°C | 25.8°C | -5.1°C | 88 mm | 73% | 0.9 m/s | 6 |
| 2004 | 13.2°C | 7.4°C | 1.5°C | 24.4°C | -7.2°C | 45 mm | 65% | 0.9 m/s | 5.2 |
| 2003 | 13.4°C | 7.6°C | 1.9°C | 24.9°C | -7.3°C | 58 mm | 72% | 1 m/s | 5.5 |
| 2002 | 12.1°C | 6.5°C | 0.8°C | 21.6°C | -7.4°C | 58 mm | 69% | 1.1 m/s | 5.2 |
| 2001 | 14.9°C | 9.0°C | 3.2°C | 22.4°C | -1.7°C | 56 mm | 65% | 1.2 m/s | 5.6 |
| 2000 | 12.8°C | 7.2°C | 1.6°C | 19.0°C | -2.2°C | 47 mm | 65% | 1 m/s | 5.2 |
| 1999 | 13.2°C | 7.7°C | 2.1°C | 25.9°C | -1.9°C | 49 mm | 66% | 1.1 m/s | 5.6 |
| 1998 | 20.0°C | 13.2°C | 6.4°C | 25.3°C | 1.5°C | 65 mm | 65% | 0.9 m/s | 6.1 |
| 1997 | 14.9°C | 8.9°C | 3.0°C | 24.8°C | -2.0°C | 77 mm | 75% | 1 m/s | 5.6 |
| 1996 ❄️ | 11.0°C | 5.9°C | 0.9°C | 18.3°C | -8.5°C | 80 mm | 73% | 0.9 m/s | 5.3 |
| 1995 | 17.1°C | 10.3°C | 3.5°C | 25.8°C | -3.9°C | 51 mm | 66% | 0.9 m/s | 5.9 |
| 1994 | 15.9°C | 9.7°C | 3.5°C | 23.7°C | -1.7°C | 58 mm | 67% | 1 m/s | 5.5 |
| 1993 | 17.9°C | 11.4°C | 4.8°C | 26.6°C | -1.8°C | 54 mm | 69% | 1 m/s | 5.7 |
| 1992 | 14.4°C | 8.4°C | 2.5°C | 23.3°C | -2.3°C | 73 mm | 68% | 1 m/s | 5.9 |
| 1991 | 16.5°C | 10.3°C | 4.1°C | 24.3°C | -2.5°C | 71 mm | 69% | 0.9 m/s | 5.8 |
| 1990 | 15.0°C | 9.1°C | 3.2°C | 24.2°C | -2.7°C | 69 mm | 73% | 0.9 m/s | 5.1 |
| 1989 | 15.4°C | 9.4°C | 3.5°C | 24.2°C | -2.7°C | 81 mm | 66% | 1 m/s | 5.6 |
| 1988 | 17.3°C | 10.7°C | 4.1°C | 25.6°C | -3.9°C | 43 mm | 62% | 1 m/s | 5.5 |
| 1987 | 16.4°C | 9.8°C | 3.2°C | 23.0°C | -2.5°C | 43 mm | 63% | 1 m/s | 5.4 |
| 1986 | 15.1°C | 8.7°C | 2.4°C | 28.6°C | -8.3°C | 31 mm | 72% | 0.8 m/s | 5.2 |
| 1985 | 16.6°C | 10.0°C | 3.4°C | 26.9°C | -2.7°C | 38 mm | 65% | 1 m/s | 6.1 |
| 1984 | 12.8°C | 7.4°C | 1.9°C | 18.9°C | -4.5°C | 88 mm | 69% | 1 m/s | 5 |
| 1983 | 15.3°C | 9.3°C | 3.3°C | 28.1°C | -4.6°C | 37 mm | 70% | 1 m/s | — |
| 1982 | 13.8°C | 7.8°C | 1.7°C | 21.1°C | -2.5°C | 50 mm | 70% | 1 m/s | — |
| 1981 | 16.8°C | 10.7°C | 4.6°C | 23.8°C | -1.5°C | 71 mm | 72% | 0.9 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15.5°C with lows near 3.3°C (mean 9.4°C), based on 45 years of NASA POWER data.
May averages 60 mm of rainfall in Grande Prairie, about average for rainfall. The wettest on record was 96 mm in 2017.
The hottest May reached 30°C in 2023. The coldest dipped to -8.5°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.1°C. Daytime highs moved from 15.1°C to 16.2°C and overnight lows from 3°C to 4.1°C over the same span.
May is one of the warmer months of the year in Grande Prairie and about average for rainfall, so plan for around 15.5°C daytime highs and 3.3°C at night.
Not quite — May is the 8th coolest month in Grande Prairie, averaging 9.4°C.
For May in Grande Prairie, pack warm layers and a jacket for chilly mornings, with typical highs of 15.5°C and lows of 3.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 68% — moderately humid.
Average wind speed in May is 1 m/s. The windiest May on record averaged 1.2 m/s (2001).
The wettest May on record was 2017 with 96 mm. On average, May sees 60 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 Grande Prairie 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.
