May is one of the warmer months of the year in Saskatoon, with average highs near 18.4°C and lows around 5.1°C (mean 11.8°C). It is a relatively wet time of year, averaging 47 mm of rainfall and 57% relative humidity across the period.
May is one of the warmer months of the year in Saskatoon. Across 45 years of records, the warmest May in Saskatoon was 1988 — when the month averaged 16°C — while the coldest was 2004 at 8.5°C. Typical May days reach 18.4°C with nights near 5.1°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Saskatoon, averaging 47 mm of rainfall. The wettest May on record was 2010 with 138 mm, while the driest was 2008 at 12 mm.
Relative humidity in Saskatoon during May averages 57%. The most humid May was 2006 at 69%, and the least humid was 1988 at 45%.
May receives about 5.8 kWh/m²/day of solar energy in Saskatoon. The sunniest May was 2002 at 6.8 kWh/m²/day, and the cloudiest were 1996, 1999 and 2024 at 5.
Average wind speed in Saskatoon during May is 3.4 m/s. The windiest May was 2001 at 4.1 m/s, while the calmest was 1996 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.3°C | 11.6°C | 11.0°C | 11.9°C | 12.4°C | +0.1°C |
| Avg High | 19.0°C | 18.2°C | 17.7°C | 18.4°C | 19.0°C | 0°C |
| Avg Low | 5.6°C | 4.9°C | 4.4°C | 5.3°C | 5.8°C | +0.2°C |
| Avg Rain | 55 mm | 46 mm | 35 mm | 55 mm | 44 mm | -11 mm |
May temperatures in Saskatoon have risen by about 1.5°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -13.4°C (1983) to a record high of 33.8°C (1984).
Rainfall in May is a relatively wet time of year, averaging 47 mm, with a wettest year of 138 mm.
A good time to visit Saskatoon
May is a good time to visit Saskatoon, with days averaging 18.4°C and nights around 5.1°C (mean 11.8°C, warmer than Saskatoon'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 | 21.3°C | 14.2°C | 7.1°C | 30.1°C | -0.1°C | 23 mm | 55% | 3.5 m/s | 6.3 |
| 2024 | 16.3°C | 10.8°C | 5.2°C | 25.4°C | -0.8°C | 61 mm | 65% | 3.4 m/s | 5 |
| 2023 | 22.9°C | 15.7°C | 8.6°C | 30.8°C | 0.7°C | 39 mm | 60% | 3 m/s | 5.7 |
| 2022 | 17.4°C | 11.2°C | 4.9°C | 26.9°C | -1.7°C | 55 mm | 62% | 3.4 m/s | 5.6 |
| 2021 | 17.6°C | 11.1°C | 4.5°C | 32.0°C | -4.7°C | 42 mm | 53% | 3.3 m/s | 6.2 |
| 2020 | 18.3°C | 11.5°C | 4.7°C | 32.6°C | -4.1°C | 46 mm | 59% | 3.6 m/s | 5.7 |
| 2019 | 17.1°C | 10.0°C | 3.0°C | 30.0°C | -5.7°C | 31 mm | 54% | 2.8 m/s | 6.1 |
| 2018 | 22.7°C | 15.4°C | 8.1°C | 30.9°C | -0.1°C | 31 mm | 54% | 3.3 m/s | 5.8 |
| 2017 | 19.8°C | 12.9°C | 6.0°C | 29.2°C | -0.2°C | 44 mm | 57% | 3.6 m/s | 6.2 |
| 2016 | 20.7°C | 14.2°C | 7.7°C | 30.7°C | -3.1°C | 55 mm | 57% | 3.3 m/s | 5.8 |
| 2015 | 17.7°C | 10.7°C | 3.7°C | 27.3°C | -2.6°C | 23 mm | 53% | 2.8 m/s | 6.7 |
| 2014 | 16.9°C | 10.6°C | 4.3°C | 29.5°C | -3.4°C | 48 mm | 62% | 3 m/s | 5.5 |
| 2013 | 20.3°C | 13.3°C | 6.2°C | 28.7°C | -5.0°C | 28 mm | 56% | 3.1 m/s | 6.3 |
| 2012 | 16.8°C | 10.9°C | 5.0°C | 25.1°C | -0.9°C | 113 mm | 64% | 3.8 m/s | 5.5 |
| 2011 | 17.2°C | 10.7°C | 4.1°C | 23.2°C | -3.8°C | 43 mm | 62% | 3.2 m/s | 6.2 |
| 2010 🌧️ | 15.2°C | 9.8°C | 4.4°C | 29.1°C | -0.3°C | 138 mm | 65% | 3.6 m/s | 5.1 |
| 2009 | 17.0°C | 10.0°C | 2.9°C | 29.6°C | -4.8°C | 12 mm | 52% | 3.3 m/s | 6 |
| 2008 | 18.2°C | 11.5°C | 4.7°C | 24.5°C | -3.4°C | 12 mm | 53% | 3.4 m/s | 6.4 |
| 2007 | 18.2°C | 11.7°C | 5.2°C | 27.1°C | 0.7°C | 55 mm | 64% | 3.6 m/s | 5.5 |
| 2006 | 17.9°C | 12.0°C | 6.1°C | 29.8°C | -3.7°C | 87 mm | 69% | 3.4 m/s | 5.1 |
| 2005 | 16.8°C | 10.5°C | 4.2°C | 24.4°C | -4.7°C | 46 mm | 60% | 3.8 m/s | 5.9 |
| 2004 ❄️ | 14.9°C | 8.5°C | 2.1°C | 24.8°C | -6.4°C | 48 mm | 59% | 3.4 m/s | 5.6 |
| 2003 | 19.5°C | 12.6°C | 5.7°C | 27.0°C | -2.5°C | 30 mm | 56% | 3.5 m/s | 6.2 |
| 2002 | 16.3°C | 9.2°C | 2.0°C | 27.9°C | -6.5°C | 14 mm | 46% | 3.7 m/s | 6.8 |
| 2001 | 20.2°C | 13.2°C | 6.1°C | 30.0°C | 0.9°C | 19 mm | 48% | 4.1 m/s | 6.1 |
| 2000 | 17.5°C | 11.1°C | 4.7°C | 27.2°C | -3.4°C | 30 mm | 54% | 3.4 m/s | 5.6 |
| 1999 | 17.3°C | 11.4°C | 5.5°C | 28.9°C | 0.1°C | 74 mm | 60% | 3.6 m/s | 5 |
| 1998 | 21.1°C | 14.0°C | 6.9°C | 28.3°C | -2.4°C | 21 mm | 51% | 3.1 m/s | 6.7 |
| 1997 | 18.3°C | 11.0°C | 3.8°C | 28.7°C | -2.8°C | 27 mm | 56% | 3.5 m/s | 5.6 |
| 1996 | 15.1°C | 9.0°C | 2.8°C | 23.2°C | -4.6°C | 46 mm | 62% | 2.6 m/s | 5 |
| 1995 | 17.5°C | 10.7°C | 3.8°C | 30.8°C | -1.9°C | 28 mm | 55% | 2.7 m/s | 6.3 |
| 1994 | 19.2°C | 12.4°C | 5.5°C | 29.8°C | -0.9°C | 70 mm | 56% | 3.3 m/s | 5.5 |
| 1993 | 19.7°C | 12.6°C | 5.5°C | 30.5°C | 0.7°C | 29 mm | 51% | 3.3 m/s | 6.1 |
| 1992 | 17.4°C | 11.0°C | 4.6°C | 31.4°C | -1.2°C | 69 mm | 58% | 3.4 m/s | 5.7 |
| 1991 | 18.8°C | 12.2°C | 5.5°C | 28.6°C | -4.2°C | 65 mm | 59% | 3.1 m/s | 5.9 |
| 1990 | 18.0°C | 11.4°C | 4.8°C | 27.6°C | -4.3°C | 28 mm | 58% | 3.3 m/s | 5.9 |
| 1989 | 18.5°C | 11.7°C | 4.9°C | 29.3°C | -5.4°C | 66 mm | 56% | 3.5 m/s | 5.8 |
| 1988 🔥 | 23.5°C | 16.0°C | 8.5°C | 33.5°C | 1.5°C | 18 mm | 45% | 3.5 m/s | 5.4 |
| 1987 | 21.6°C | 14.6°C | 7.6°C | 29.2°C | -0.9°C | 40 mm | 53% | 3.3 m/s | 5.9 |
| 1986 | 19.4°C | 12.8°C | 6.1°C | 33.7°C | -2.3°C | 73 mm | 60% | 3.6 m/s | 5.5 |
| 1985 | 19.9°C | 13.4°C | 6.9°C | 28.8°C | 2.1°C | 66 mm | 60% | 3.1 m/s | 5.9 |
| 1984 | 17.0°C | 10.6°C | 4.1°C | 33.8°C | -2.0°C | 41 mm | 55% | 4 m/s | 5.4 |
| 1983 | 15.4°C | 8.7°C | 2.1°C | 27.8°C | -13.4°C | 60 mm | 65% | 3.3 m/s | — |
| 1982 | 16.0°C | 10.1°C | 4.2°C | 27.9°C | -4.6°C | 112 mm | 63% | 3.6 m/s | — |
| 1981 | 19.7°C | 12.7°C | 5.6°C | 27.9°C | -1.9°C | 21 mm | 52% | 3.4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 18.4°C with lows near 5.1°C (mean 11.8°C), based on 45 years of NASA POWER data.
May averages 47 mm of rainfall in Saskatoon, a relatively wet time of year. The wettest on record was 138 mm in 2010.
The hottest May reached 33.8°C in 1984. The coldest dipped to -13.4°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.5°C. Daytime highs moved from 17.6°C to 19.1°C and overnight lows from 4.6°C to 6.1°C over the same span.
May is one of the warmer months of the year in Saskatoon and a relatively wet time of year, so plan for around 18.4°C daytime highs and 5.1°C at night.
Not quite — May is the 8th coolest month in Saskatoon, averaging 11.8°C.
For May in Saskatoon, pack warm layers and a jacket for chilly mornings, with typical highs of 18.4°C and lows of 5.1°C.
Relative humidity in May averages 57% — moderately humid.
Average wind speed in May is 3.4 m/s. The windiest May on record averaged 4.1 m/s (2001).
The wettest May on record was 2010 with 138 mm. On average, May sees 47 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 Saskatoon 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.
