May is one of the warmer months of the year in Regina, with average highs near 18.6°C and lows around 5°C (mean 11.8°C). It is a relatively wet time of year, averaging 52 mm of rainfall and 58% relative humidity across the period.
May is one of the warmer months of the year in Regina. Across 45 years of records, the warmest May in Regina was 2018 — when the month averaged 16.1°C — while the coldest was 2004 at 8.1°C. Typical May days reach 18.6°C with nights near 5°C. The long-term trend is warming, about 0.2°C per decade.
May is a relatively wet time of year in Regina, averaging 52 mm of rainfall. The wettest May on record was 2004 with 114 mm, while the driest was 1997 at 17 mm.
Relative humidity in Regina during May averages 58%. The most humid Mays were 1982 and 2006 at 68%, and the least humid was 1993 at 51%.
May receives about 5.8 kWh/m²/day of solar energy in Regina. The sunniest May was 2002 at 6.7 kWh/m²/day, and the cloudiest was 2004 at 4.9.
Average wind speed in Regina during May is 3.7 m/s. The windiest Mays were 1984, 1986 and 2001 at 4.2 m/s, while the calmest was 1996 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.4°C | 11.4°C | 10.8°C | 12.2°C | 12.6°C | +0.2°C |
| Avg High | 19.4°C | 18.3°C | 17.5°C | 18.9°C | 19.5°C | +0.1°C |
| Avg Low | 5.4°C | 4.5°C | 4.1°C | 5.5°C | 5.7°C | +0.3°C |
| Avg Rain | 59 mm | 47 mm | 61 mm | 48 mm | 43 mm | -16 mm |
May temperatures in Regina have risen by about 1.5°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -6.2°C (2013) to a record high of 33.8°C (1984).
Rainfall in May is a relatively wet time of year, averaging 52 mm, with a wettest year of 114 mm.
A good time to visit Regina
May is a good time to visit Regina, with days averaging 18.6°C and nights around 5°C (mean 11.8°C, warmer than Regina'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 | 20.8°C | 13.5°C | 6.3°C | 32.0°C | -0.5°C | 28 mm | 56% | 3.9 m/s | 6 |
| 2024 | 17.6°C | 11.4°C | 5.2°C | 28.7°C | -0.3°C | 63 mm | 64% | 3.5 m/s | 5.4 |
| 2023 | 23.0°C | 15.5°C | 8.1°C | 30.8°C | -1.0°C | 23 mm | 60% | 3 m/s | 5.6 |
| 2022 | 18.3°C | 11.6°C | 4.9°C | 27.4°C | -1.1°C | 71 mm | 60% | 3.9 m/s | 5.5 |
| 2021 | 17.9°C | 11.2°C | 4.5°C | 32.9°C | -2.2°C | 57 mm | 51% | 3.6 m/s | 6 |
| 2020 | 19.5°C | 12.3°C | 5.1°C | 31.4°C | -4.7°C | 18 mm | 53% | 3.9 m/s | 6.4 |
| 2019 | 17.8°C | 10.5°C | 3.3°C | 31.3°C | -4.2°C | 19 mm | 52% | 3.3 m/s | 6.3 |
| 2018 🔥 | 23.4°C | 16.1°C | 8.7°C | 32.3°C | -4.1°C | 34 mm | 52% | 3.4 m/s | 6.3 |
| 2017 | 20.4°C | 13.2°C | 6.0°C | 29.6°C | -1.2°C | 22 mm | 54% | 4.1 m/s | 6.5 |
| 2016 | 20.9°C | 14.3°C | 7.8°C | 32.3°C | -1.9°C | 53 mm | 56% | 3.7 m/s | 5.8 |
| 2015 | 18.6°C | 11.3°C | 4.0°C | 28.3°C | -3.8°C | 17 mm | 52% | 3.3 m/s | 6 |
| 2014 | 17.9°C | 11.4°C | 4.8°C | 30.8°C | -3.4°C | 49 mm | 60% | 3.5 m/s | 5.9 |
| 2013 | 20.1°C | 13.1°C | 6.1°C | 28.3°C | -6.2°C | 36 mm | 54% | 3.9 m/s | 6.1 |
| 2012 | 17.7°C | 11.6°C | 5.5°C | 28.6°C | 0.8°C | 79 mm | 61% | 3.8 m/s | 5.3 |
| 2011 | 16.2°C | 10.3°C | 4.5°C | 22.5°C | -3.3°C | 74 mm | 65% | 4 m/s | 5.4 |
| 2010 | 16.2°C | 10.4°C | 4.6°C | 28.6°C | -2.6°C | 99 mm | 62% | 4.1 m/s | 5.1 |
| 2009 | 17.5°C | 10.4°C | 3.2°C | 30.3°C | -2.7°C | 21 mm | 54% | 3.6 m/s | 6.1 |
| 2008 | 18.1°C | 11.0°C | 3.9°C | 24.6°C | -4.5°C | 31 mm | 55% | 3.8 m/s | 6.1 |
| 2007 | 18.7°C | 12.2°C | 5.7°C | 28.5°C | -0.6°C | 96 mm | 66% | 4 m/s | 5.4 |
| 2006 | 18.7°C | 12.4°C | 6.0°C | 30.5°C | -3.2°C | 61 mm | 68% | 3.4 m/s | 5.4 |
| 2005 | 15.8°C | 9.8°C | 3.8°C | 23.9°C | -6.0°C | 77 mm | 65% | 3.9 m/s | 5.5 |
| 2004 ❄️ 🌧️ | 14.3°C | 8.1°C | 1.9°C | 24.9°C | -4.9°C | 114 mm | 64% | 3.8 m/s | 4.9 |
| 2003 | 18.6°C | 12.0°C | 5.3°C | 27.2°C | -1.8°C | 35 mm | 57% | 3.7 m/s | 6.1 |
| 2002 | 15.9°C | 8.6°C | 1.3°C | 28.0°C | -6.0°C | 35 mm | 51% | 3.9 m/s | 6.7 |
| 2001 | 19.5°C | 12.5°C | 5.5°C | 28.8°C | 0.2°C | 49 mm | 54% | 4.2 m/s | 6.5 |
| 2000 | 18.1°C | 11.3°C | 4.5°C | 25.8°C | -3.5°C | 91 mm | 59% | 3.6 m/s | 5.7 |
| 1999 | 16.8°C | 11.1°C | 5.3°C | 26.0°C | -0.7°C | 89 mm | 66% | 4 m/s | 5.1 |
| 1998 | 20.7°C | 13.3°C | 5.9°C | 28.0°C | -1.5°C | 43 mm | 54% | 3.5 m/s | 6.3 |
| 1997 | 17.9°C | 10.6°C | 3.3°C | 29.1°C | -2.9°C | 17 mm | 56% | 3.8 m/s | 6 |
| 1996 | 15.3°C | 9.0°C | 2.8°C | 22.7°C | -5.4°C | 44 mm | 64% | 2.9 m/s | 5.2 |
| 1995 | 17.1°C | 10.1°C | 3.2°C | 29.3°C | -5.1°C | 56 mm | 62% | 3 m/s | 5.7 |
| 1994 | 20.4°C | 13.0°C | 5.6°C | 29.7°C | -4.0°C | 27 mm | 54% | 3.8 m/s | 5.8 |
| 1993 | 19.6°C | 12.2°C | 4.9°C | 29.9°C | -0.1°C | 18 mm | 51% | 3.5 m/s | 6.1 |
| 1992 | 19.0°C | 11.7°C | 4.5°C | 31.3°C | -1.0°C | 38 mm | 59% | 3.8 m/s | 5.5 |
| 1991 | 19.1°C | 12.5°C | 6.0°C | 28.7°C | -4.3°C | 77 mm | 62% | 3.4 m/s | 5.8 |
| 1990 | 17.0°C | 10.5°C | 4.0°C | 25.6°C | -3.8°C | 57 mm | 61% | 3.6 m/s | 5.9 |
| 1989 | 20.3°C | 13.2°C | 6.1°C | 27.7°C | -4.5°C | 54 mm | 53% | 3.4 m/s | 6.2 |
| 1988 | 22.6°C | 15.0°C | 7.3°C | 33.8°C | -2.2°C | 43 mm | 55% | 4 m/s | 5.4 |
| 1987 | 22.4°C | 15.1°C | 7.9°C | 31.2°C | 0.8°C | 62 mm | 54% | 3.7 m/s | 5.9 |
| 1986 | 19.5°C | 12.4°C | 5.3°C | 33.2°C | -4.4°C | 97 mm | 63% | 4.2 m/s | 5.9 |
| 1985 | 20.2°C | 13.4°C | 6.7°C | 28.7°C | 0.0°C | 61 mm | 61% | 3.3 m/s | 5.9 |
| 1984 | 17.5°C | 10.5°C | 3.5°C | 33.8°C | -4.4°C | 40 mm | 55% | 4.2 m/s | 5.6 |
| 1983 | 15.6°C | 8.8°C | 2.0°C | 27.2°C | -6.0°C | 68 mm | 65% | 3.7 m/s | — |
| 1982 | 16.2°C | 10.3°C | 4.5°C | 24.8°C | -3.9°C | 93 mm | 68% | 3.7 m/s | — |
| 1981 | 19.9°C | 12.6°C | 5.3°C | 30.3°C | -3.1°C | 18 mm | 54% | 4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 18.6°C with lows near 5°C (mean 11.8°C), based on 45 years of NASA POWER data.
May averages 52 mm of rainfall in Regina, a relatively wet time of year. The wettest on record was 114 mm in 2004.
The hottest May reached 33.8°C in 1984. The coldest dipped to -6.2°C in 2013.
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 17.9°C to 19.5°C and overnight lows from 4.4°C to 5.8°C over the same span.
May is one of the warmer months of the year in Regina and a relatively wet time of year, so plan for around 18.6°C daytime highs and 5°C at night.
Not quite — May is the 8th coolest month in Regina, averaging 11.8°C.
For May in Regina, pack warm layers and a jacket for chilly mornings, with typical highs of 18.6°C and lows of 5°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 58% — moderately humid.
Average wind speed in May is 3.7 m/s. The windiest May on record averaged 4.2 m/s (1984).
The wettest May on record was 2004 with 114 mm. On average, May sees 52 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 Regina 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.
