May is one of the warmer months of the year in Moose Jaw, with average highs near 19.1°C and lows around 5.6°C (mean 12.4°C). It is a relatively wet time of year, averaging 47 mm of rainfall and 56% relative humidity across the period.
May is one of the warmer months of the year in Moose Jaw. Across 45 years of records, the warmest May in Moose Jaw was 2018 — when the month averaged 16.7°C — while the coldest was 2004 at 8.7°C. Typical May days reach 19.1°C with nights near 5.6°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Moose Jaw, averaging 47 mm of rainfall. The wettest May on record was 1982 with 125 mm, while the driest was 2019 at 12 mm.
Relative humidity in Moose Jaw during May averages 56%. The most humid May was 1982 at 66%, and the least humid was 1988 at 48%.
May receives about 5.8 kWh/m²/day of solar energy in Moose Jaw. The sunniest May was 2002 at 6.7 kWh/m²/day, and the cloudiest was 2004 at 4.9.
Average wind speed in Moose Jaw during May is 3.6 m/s. The windiest May was 2001 at 4.3 m/s, while the calmest was 1996 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.8°C | 11.9°C | 11.6°C | 12.6°C | 13.1°C | +0.3°C |
| Avg High | 19.7°C | 18.7°C | 18.3°C | 19.2°C | 19.9°C | +0.2°C |
| Avg Low | 6.0°C | 5.2°C | 4.8°C | 5.9°C | 6.3°C | +0.3°C |
| Avg Rain | 58 mm | 43 mm | 52 mm | 47 mm | 34 mm | -24 mm |
May temperatures in Moose Jaw have risen by about 1.4°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -6.2°C (2002) to a record high of 35.1°C (1988).
Rainfall in May is a relatively wet time of year, averaging 47 mm, with a wettest year of 125 mm.
A good time to visit Moose Jaw
May is a good time to visit Moose Jaw, with days averaging 19.1°C and nights around 5.6°C (mean 12.4°C, warmer than Moose Jaw'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 | 21.6°C | 14.4°C | 7.3°C | 31.1°C | 0.7°C | 20 mm | 54% | 3.8 m/s | 6 |
| 2024 | 17.5°C | 11.6°C | 5.8°C | 27.2°C | 0.3°C | 57 mm | 63% | 3.5 m/s | 5.4 |
| 2023 | 23.2°C | 15.9°C | 8.6°C | 31.6°C | -0.2°C | 27 mm | 59% | 3 m/s | 5.6 |
| 2022 | 18.8°C | 12.2°C | 5.5°C | 28.1°C | -0.4°C | 33 mm | 56% | 3.8 m/s | 5.5 |
| 2021 | 18.2°C | 11.6°C | 5.0°C | 33.2°C | -1.3°C | 46 mm | 51% | 3.6 m/s | 6 |
| 2020 | 19.9°C | 12.7°C | 5.5°C | 33.9°C | -3.8°C | 18 mm | 52% | 3.9 m/s | 6.4 |
| 2019 | 17.9°C | 10.9°C | 3.9°C | 31.6°C | -4.0°C | 12 mm | 51% | 3.2 m/s | 6.3 |
| 2018 🔥 | 24.1°C | 16.7°C | 9.4°C | 32.3°C | -2.2°C | 13 mm | 49% | 3.4 m/s | 6.3 |
| 2017 | 20.8°C | 13.8°C | 6.7°C | 31.5°C | 0.1°C | 18 mm | 52% | 3.9 m/s | 6.5 |
| 2016 | 20.9°C | 14.4°C | 7.8°C | 32.4°C | -2.7°C | 73 mm | 55% | 3.7 m/s | 5.8 |
| 2015 | 19.0°C | 11.7°C | 4.5°C | 28.7°C | -2.9°C | 13 mm | 51% | 3.1 m/s | 6 |
| 2014 | 18.0°C | 11.5°C | 4.9°C | 31.2°C | -4.0°C | 57 mm | 59% | 3.5 m/s | 5.9 |
| 2013 | 20.6°C | 13.7°C | 6.9°C | 29.0°C | -4.8°C | 34 mm | 52% | 3.6 m/s | 6.1 |
| 2012 | 18.0°C | 11.9°C | 5.9°C | 29.9°C | 0.7°C | 78 mm | 60% | 3.7 m/s | 5.3 |
| 2011 | 16.9°C | 10.8°C | 4.8°C | 22.8°C | -3.5°C | 66 mm | 63% | 3.8 m/s | 5.4 |
| 2010 | 15.8°C | 10.1°C | 4.4°C | 29.4°C | -2.3°C | 103 mm | 62% | 4 m/s | 5.1 |
| 2009 | 18.2°C | 11.0°C | 3.7°C | 32.1°C | -3.0°C | 30 mm | 51% | 3.6 m/s | 6.1 |
| 2008 | 19.0°C | 12.1°C | 5.2°C | 25.5°C | -3.8°C | 24 mm | 52% | 3.9 m/s | 6.1 |
| 2007 | 19.7°C | 13.1°C | 6.5°C | 29.3°C | 0.4°C | 67 mm | 62% | 4 m/s | 5.4 |
| 2006 | 20.0°C | 13.4°C | 6.9°C | 31.2°C | -2.5°C | 60 mm | 61% | 3.6 m/s | 5.4 |
| 2005 | 16.8°C | 10.6°C | 4.4°C | 24.6°C | -4.7°C | 49 mm | 59% | 4 m/s | 5.5 |
| 2004 ❄️ | 14.8°C | 8.7°C | 2.6°C | 25.6°C | -5.3°C | 120 mm | 65% | 3.5 m/s | 4.9 |
| 2003 | 18.9°C | 12.4°C | 5.9°C | 27.3°C | -1.6°C | 49 mm | 58% | 3.7 m/s | 6.1 |
| 2002 | 16.8°C | 9.4°C | 1.9°C | 28.5°C | -6.2°C | 25 mm | 49% | 4.1 m/s | 6.7 |
| 2001 | 20.3°C | 13.3°C | 6.3°C | 28.9°C | 1.0°C | 32 mm | 49% | 4.3 m/s | 6.5 |
| 2000 | 18.5°C | 11.8°C | 5.0°C | 27.6°C | -2.4°C | 63 mm | 55% | 3.6 m/s | 5.7 |
| 1999 | 17.6°C | 11.8°C | 6.0°C | 27.5°C | -0.8°C | 67 mm | 62% | 3.8 m/s | 5.1 |
| 1998 | 21.2°C | 13.9°C | 6.6°C | 28.2°C | -1.2°C | 38 mm | 52% | 3.5 m/s | 6.3 |
| 1997 | 18.2°C | 11.0°C | 3.9°C | 29.6°C | -2.3°C | 24 mm | 56% | 3.8 m/s | 6 |
| 1996 | 15.3°C | 9.3°C | 3.3°C | 22.6°C | -5.6°C | 41 mm | 64% | 2.8 m/s | 5.2 |
| 1995 | 17.6°C | 10.6°C | 3.6°C | 29.9°C | -4.4°C | 44 mm | 59% | 3 m/s | 5.7 |
| 1994 | 20.6°C | 13.4°C | 6.2°C | 31.0°C | -1.6°C | 37 mm | 54% | 3.6 m/s | 5.8 |
| 1993 | 20.3°C | 13.0°C | 5.8°C | 30.0°C | 1.2°C | 22 mm | 49% | 3.5 m/s | 6.1 |
| 1992 | 19.4°C | 12.3°C | 5.2°C | 31.5°C | -0.4°C | 42 mm | 56% | 3.7 m/s | 5.5 |
| 1991 | 19.1°C | 12.6°C | 6.2°C | 28.9°C | -4.4°C | 61 mm | 60% | 3.4 m/s | 5.8 |
| 1990 | 17.4°C | 11.1°C | 4.7°C | 26.2°C | -2.6°C | 52 mm | 60% | 3.6 m/s | 5.9 |
| 1989 | 20.0°C | 12.9°C | 5.9°C | 28.1°C | -4.5°C | 53 mm | 53% | 3.5 m/s | 6.2 |
| 1988 | 23.7°C | 16.1°C | 8.5°C | 35.1°C | -0.2°C | 21 mm | 48% | 3.8 m/s | 5.4 |
| 1987 | 22.4°C | 15.4°C | 8.4°C | 31.1°C | 0.9°C | 56 mm | 53% | 3.6 m/s | 5.9 |
| 1986 | 19.6°C | 12.7°C | 5.8°C | 34.7°C | -2.7°C | 98 mm | 61% | 3.9 m/s | 5.9 |
| 1985 | 20.7°C | 14.1°C | 7.5°C | 30.4°C | 2.2°C | 52 mm | 59% | 3.3 m/s | 5.9 |
| 1984 | 18.3°C | 11.4°C | 4.4°C | 34.4°C | -3.8°C | 28 mm | 50% | 4.2 m/s | 5.6 |
| 1983 | 15.8°C | 9.3°C | 2.8°C | 27.9°C | -5.3°C | 65 mm | 63% | 3.6 m/s | — |
| 1982 🌧️ | 16.3°C | 10.3°C | 4.4°C | 25.8°C | -4.3°C | 125 mm | 66% | 3.8 m/s | — |
| 1981 | 20.4°C | 13.2°C | 6.0°C | 30.3°C | -1.6°C | 22 mm | 52% | 4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.1°C with lows near 5.6°C (mean 12.4°C), based on 45 years of NASA POWER data.
May averages 47 mm of rainfall in Moose Jaw, a relatively wet time of year. The wettest on record was 125 mm in 1982.
The hottest May reached 35.1°C in 1988. The coldest dipped to -6.2°C in 2002.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.4°C. Daytime highs moved from 18.3°C to 19.9°C and overnight lows from 5°C to 6.4°C over the same span.
May is one of the warmer months of the year in Moose Jaw and a relatively wet time of year, so plan for around 19.1°C daytime highs and 5.6°C at night.
Not quite — May is the 8th coolest month in Moose Jaw, averaging 12.4°C.
For May in Moose Jaw, pack warm layers and a jacket for chilly mornings, with typical highs of 19.1°C and lows of 5.6°C.
Relative humidity in May averages 56% — moderately humid.
Average wind speed in May is 3.6 m/s. The windiest May on record averaged 4.3 m/s (2001).
The wettest May on record was 1982 with 125 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 Moose Jaw 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.
