May is one of the warmer months of the year in Weyburn, with average highs near 19.2°C and lows around 5.5°C (mean 12.4°C). It is a relatively wet time of year, averaging 64 mm of rainfall and 57% relative humidity across the period.
May is one of the warmer months of the year in Weyburn. Across 45 years of records, the warmest May in Weyburn was 2018 — when the month averaged 16.7°C — while the coldest was 2004 at 8.9°C. Typical May days reach 19.2°C with nights near 5.5°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Weyburn, averaging 64 mm of rainfall. The wettest May on record was 2011 with 159 mm, while the driest was 1997 at 13 mm.
Relative humidity in Weyburn during May averages 57%. The most humid May was 2011 at 69%, and the least humid was 2002 at 49%.
May receives about 5.8 kWh/m²/day of solar energy in Weyburn. The sunniest Mays were 2017 and 2020 at 6.5 kWh/m²/day, and the cloudiest were 1999 and 2004 at 5.2.
Average wind speed in Weyburn during May is 3.7 m/s. The windiest Mays were 1999 and 2001 at 4.2 m/s, while the calmest was 2023 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.0°C | 12.1°C | 11.5°C | 12.5°C | 12.9°C | -0.1°C |
| Avg High | 20.0°C | 19.0°C | 18.2°C | 19.1°C | 19.7°C | -0.3°C |
| Avg Low | 5.9°C | 5.2°C | 4.7°C | 5.8°C | 6.0°C | +0.1°C |
| Avg Rain | 58 mm | 52 mm | 64 mm | 74 mm | 77 mm | +18 mm |
May temperatures in Weyburn have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -6.3°C (2002) to a record high of 35.9°C (1984).
Rainfall in May is a relatively wet time of year, averaging 64 mm, with a wettest year of 159 mm.
A good time to visit Weyburn
May is a good time to visit Weyburn, with days averaging 19.2°C and nights around 5.5°C (mean 12.4°C, warmer than Weyburn'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 | 20.6°C | 13.4°C | 6.2°C | 32.8°C | -0.2°C | 78 mm | 60% | 3.6 m/s | 5.8 |
| 2024 | 18.2°C | 12.1°C | 5.9°C | 28.3°C | -0.5°C | 101 mm | 62% | 3.6 m/s | 5.4 |
| 2023 | 22.7°C | 15.6°C | 8.5°C | 30.2°C | -1.1°C | 79 mm | 62% | 2.9 m/s | 5.8 |
| 2022 | 18.7°C | 11.8°C | 5.0°C | 26.2°C | -1.5°C | 118 mm | 62% | 3.9 m/s | 5.4 |
| 2021 | 18.4°C | 11.7°C | 5.0°C | 31.7°C | -2.1°C | 54 mm | 51% | 3.6 m/s | 6.2 |
| 2020 | 19.7°C | 12.5°C | 5.4°C | 30.4°C | -4.4°C | 30 mm | 54% | 3.8 m/s | 6.5 |
| 2019 | 17.6°C | 10.6°C | 3.7°C | 30.0°C | -3.5°C | 25 mm | 53% | 3.3 m/s | 6.2 |
| 2018 🔥 | 24.0°C | 16.7°C | 9.3°C | 33.0°C | -2.3°C | 46 mm | 50% | 3.2 m/s | 6.4 |
| 2017 | 20.8°C | 13.7°C | 6.6°C | 29.1°C | -0.8°C | 29 mm | 53% | 4 m/s | 6.5 |
| 2016 | 20.9°C | 14.3°C | 7.8°C | 32.5°C | -1.8°C | 90 mm | 55% | 3.7 m/s | 5.8 |
| 2015 | 18.4°C | 11.5°C | 4.5°C | 26.6°C | -5.5°C | 59 mm | 54% | 3.3 m/s | 5.9 |
| 2014 | 18.7°C | 12.0°C | 5.3°C | 31.0°C | -3.8°C | 46 mm | 58% | 3.4 m/s | 6 |
| 2013 | 19.9°C | 13.0°C | 6.2°C | 29.6°C | -5.0°C | 84 mm | 57% | 3.7 m/s | 5.9 |
| 2012 | 18.2°C | 12.1°C | 6.0°C | 29.7°C | 1.0°C | 94 mm | 62% | 3.6 m/s | 5.4 |
| 2011 🌧️ | 15.9°C | 10.0°C | 4.2°C | 21.8°C | -3.4°C | 159 mm | 69% | 4 m/s | 5.3 |
| 2010 | 16.8°C | 10.7°C | 4.7°C | 29.0°C | -1.5°C | 108 mm | 63% | 3.9 m/s | 5.3 |
| 2009 | 18.1°C | 10.8°C | 3.5°C | 29.1°C | -2.8°C | 15 mm | 55% | 3.6 m/s | 6.1 |
| 2008 | 18.5°C | 11.5°C | 4.5°C | 25.5°C | -3.9°C | 34 mm | 53% | 3.9 m/s | 6.1 |
| 2007 | 19.2°C | 12.8°C | 6.3°C | 29.3°C | 0.6°C | 142 mm | 65% | 3.8 m/s | 5.3 |
| 2006 | 20.0°C | 13.2°C | 6.4°C | 32.9°C | -1.4°C | 42 mm | 62% | 3.4 m/s | 5.7 |
| 2005 | 16.6°C | 10.6°C | 4.5°C | 25.4°C | -4.9°C | 75 mm | 61% | 4 m/s | 5.4 |
| 2004 ❄️ | 15.1°C | 8.9°C | 2.8°C | 25.5°C | -5.4°C | 131 mm | 63% | 3.8 m/s | 5.2 |
| 2003 | 18.6°C | 12.3°C | 5.9°C | 30.7°C | -1.5°C | 54 mm | 58% | 3.5 m/s | 5.9 |
| 2002 | 16.7°C | 9.2°C | 1.7°C | 29.4°C | -6.3°C | 29 mm | 49% | 4 m/s | 6.4 |
| 2001 | 20.4°C | 13.3°C | 6.1°C | 31.2°C | 0.6°C | 37 mm | 50% | 4.2 m/s | 6.4 |
| 2000 | 19.3°C | 12.4°C | 5.5°C | 31.2°C | -2.7°C | 77 mm | 54% | 3.6 m/s | 5.8 |
| 1999 | 17.4°C | 11.5°C | 5.5°C | 28.6°C | 0.0°C | 118 mm | 65% | 4.2 m/s | 5.2 |
| 1998 | 21.5°C | 14.1°C | 6.7°C | 28.1°C | -0.6°C | 18 mm | 51% | 3.6 m/s | 6.2 |
| 1997 | 18.5°C | 11.1°C | 3.8°C | 30.5°C | -3.0°C | 13 mm | 53% | 3.9 m/s | 6.2 |
| 1996 | 16.2°C | 9.8°C | 3.5°C | 24.5°C | -3.4°C | 47 mm | 63% | 3 m/s | 5.4 |
| 1995 | 17.2°C | 10.7°C | 4.1°C | 31.4°C | -4.2°C | 65 mm | 63% | 3.1 m/s | 5.3 |
| 1994 | 21.3°C | 13.9°C | 6.5°C | 29.0°C | -2.7°C | 40 mm | 54% | 3.7 m/s | 6.2 |
| 1993 | 20.1°C | 12.9°C | 5.6°C | 31.5°C | 0.2°C | 27 mm | 49% | 3.5 m/s | 5.9 |
| 1992 | 20.3°C | 12.9°C | 5.6°C | 32.3°C | -1.5°C | 64 mm | 56% | 3.9 m/s | 5.7 |
| 1991 | 20.1°C | 13.3°C | 6.6°C | 31.3°C | -3.9°C | 72 mm | 60% | 3.5 m/s | 5.5 |
| 1990 | 17.8°C | 11.2°C | 4.5°C | 28.1°C | -3.8°C | 53 mm | 58% | 3.8 m/s | 5.8 |
| 1989 | 20.7°C | 13.7°C | 6.7°C | 28.4°C | -2.7°C | 52 mm | 50% | 3.4 m/s | 6.1 |
| 1988 | 23.2°C | 15.7°C | 8.3°C | 35.3°C | -1.4°C | 43 mm | 53% | 4.1 m/s | 5.7 |
| 1987 | 22.7°C | 15.4°C | 8.2°C | 31.3°C | 1.4°C | 63 mm | 53% | 3.5 m/s | 5.7 |
| 1986 | 20.0°C | 12.8°C | 5.5°C | 33.0°C | -4.4°C | 108 mm | 62% | 4.1 m/s | 6 |
| 1985 | 21.2°C | 14.3°C | 7.3°C | 30.3°C | 0.6°C | 49 mm | 55% | 3.5 m/s | 5.6 |
| 1984 | 18.8°C | 11.4°C | 4.0°C | 35.9°C | -4.3°C | 21 mm | 49% | 4 m/s | 5.6 |
| 1983 | 16.6°C | 9.7°C | 2.8°C | 28.1°C | -5.8°C | 61 mm | 61% | 3.5 m/s | — |
| 1982 | 16.9°C | 10.9°C | 5.0°C | 28.2°C | -3.8°C | 92 mm | 66% | 3.4 m/s | — |
| 1981 | 20.3°C | 12.9°C | 5.5°C | 30.0°C | -3.9°C | 36 mm | 55% | 4.1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.2°C with lows near 5.5°C (mean 12.4°C), based on 45 years of NASA POWER data.
May averages 64 mm of rainfall in Weyburn, a relatively wet time of year. The wettest on record was 159 mm in 2011.
The hottest May reached 35.9°C in 1984. The coldest dipped to -6.3°C in 2002.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.1°C. Daytime highs moved from 18.8°C to 19.7°C and overnight lows from 4.9°C to 6.1°C over the same span.
May is one of the warmer months of the year in Weyburn and a relatively wet time of year, so plan for around 19.2°C daytime highs and 5.5°C at night.
Not quite — May is the 8th coolest month in Weyburn, averaging 12.4°C.
For May in Weyburn, pack warm layers and a jacket for chilly mornings, with typical highs of 19.2°C and lows of 5.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 57% — moderately humid.
Average wind speed in May is 3.7 m/s. The windiest May on record averaged 4.2 m/s (1999).
The wettest May on record was 2011 with 159 mm. On average, May sees 64 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 Weyburn 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.
