May is one of the warmer months of the year in Estevan, with average highs near 19.3°C and lows around 5.7°C (mean 12.5°C). It is a relatively wet time of year, averaging 67 mm of rainfall and 58% relative humidity across the period.
May is one of the warmer months of the year in Estevan. Across 45 years of records, the warmest May in Estevan was 2018 — when the month averaged 16.6°C — while the coldest was 2004 at 9.1°C. Typical May days reach 19.3°C with nights near 5.7°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Estevan, averaging 67 mm of rainfall. The wettest May on record was 2011 with 172 mm, while the driest was 2009 at 12 mm.
Relative humidity in Estevan during May averages 58%. The most humid May was 2011 at 71%, and the least humid was 1984 at 49%.
May receives about 5.8 kWh/m²/day of solar energy in Estevan. 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 Estevan during May is 3.7 m/s. The windiest May was 1999 at 4.4 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 | 13.1°C | 12.3°C | 11.7°C | 12.5°C | 13.0°C | -0.1°C |
| Avg High | 20.2°C | 19.2°C | 18.5°C | 19.1°C | 19.8°C | -0.4°C |
| Avg Low | 6.1°C | 5.5°C | 4.9°C | 5.9°C | 6.2°C | +0.1°C |
| Avg Rain | 57 mm | 56 mm | 64 mm | 79 mm | 85 mm | +28 mm |
May temperatures in Estevan have risen by about 1.1°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -6.6°C (2004) to a record high of 35.3°C (1988).
Rainfall in May is a relatively wet time of year, averaging 67 mm, with a wettest year of 172 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Estevan
May is a good time to visit Estevan, with days averaging 19.3°C and nights around 5.7°C (mean 12.5°C, warmer than Estevan'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 | 20.7°C | 13.6°C | 6.6°C | 34.1°C | 0.0°C | 101 mm | 60% | 3.5 m/s | 5.8 |
| 2024 | 18.5°C | 12.3°C | 6.0°C | 27.9°C | 0.4°C | 111 mm | 63% | 3.7 m/s | 5.4 |
| 2023 | 22.8°C | 15.8°C | 8.8°C | 30.6°C | -0.5°C | 99 mm | 63% | 2.9 m/s | 5.8 |
| 2022 | 18.5°C | 11.9°C | 5.2°C | 26.4°C | -1.7°C | 127 mm | 63% | 3.9 m/s | 5.4 |
| 2021 | 18.8°C | 12.0°C | 5.3°C | 30.7°C | -1.3°C | 44 mm | 50% | 3.7 m/s | 6.2 |
| 2020 | 19.7°C | 12.6°C | 5.5°C | 29.6°C | -4.3°C | 27 mm | 54% | 3.8 m/s | 6.5 |
| 2019 | 17.5°C | 10.7°C | 4.0°C | 30.0°C | -3.0°C | 20 mm | 53% | 3.3 m/s | 6.2 |
| 2018 🔥 | 23.9°C | 16.6°C | 9.3°C | 33.0°C | -1.2°C | 50 mm | 51% | 3.2 m/s | 6.4 |
| 2017 | 20.8°C | 13.7°C | 6.7°C | 28.5°C | -0.6°C | 34 mm | 54% | 3.9 m/s | 6.5 |
| 2016 | 20.9°C | 14.2°C | 7.5°C | 32.2°C | -1.9°C | 105 mm | 55% | 3.8 m/s | 5.8 |
| 2015 | 18.4°C | 11.5°C | 4.7°C | 27.3°C | -6.1°C | 61 mm | 56% | 3.4 m/s | 5.9 |
| 2014 | 18.9°C | 12.0°C | 5.1°C | 30.3°C | -3.9°C | 41 mm | 60% | 3.3 m/s | 6 |
| 2013 | 19.2°C | 12.7°C | 6.2°C | 29.6°C | -5.0°C | 111 mm | 60% | 3.8 m/s | 5.9 |
| 2012 | 18.7°C | 12.4°C | 6.1°C | 29.1°C | 0.9°C | 80 mm | 61% | 3.7 m/s | 5.4 |
| 2011 🌧️ | 15.7°C | 9.9°C | 4.0°C | 21.4°C | -4.7°C | 172 mm | 71% | 3.9 m/s | 5.3 |
| 2010 | 17.0°C | 11.0°C | 4.9°C | 28.1°C | -1.2°C | 117 mm | 65% | 3.8 m/s | 5.3 |
| 2009 | 18.1°C | 10.9°C | 3.6°C | 28.0°C | -4.0°C | 12 mm | 58% | 3.5 m/s | 6.1 |
| 2008 | 18.5°C | 11.6°C | 4.7°C | 25.9°C | -3.0°C | 36 mm | 53% | 3.9 m/s | 6.1 |
| 2007 | 19.5°C | 13.1°C | 6.6°C | 29.7°C | 0.6°C | 132 mm | 64% | 3.8 m/s | 5.3 |
| 2006 | 20.3°C | 13.4°C | 6.5°C | 33.0°C | -1.4°C | 39 mm | 60% | 3.6 m/s | 5.7 |
| 2005 | 17.2°C | 11.0°C | 4.7°C | 26.2°C | -5.2°C | 97 mm | 61% | 4.1 m/s | 5.4 |
| 2004 ❄️ | 15.4°C | 9.1°C | 2.9°C | 25.4°C | -6.6°C | 122 mm | 64% | 3.8 m/s | 5.2 |
| 2003 | 18.7°C | 12.3°C | 6.0°C | 31.3°C | -1.2°C | 63 mm | 59% | 3.6 m/s | 5.9 |
| 2002 | 17.0°C | 9.4°C | 1.9°C | 29.7°C | -6.5°C | 29 mm | 49% | 4 m/s | 6.4 |
| 2001 | 20.4°C | 13.4°C | 6.4°C | 32.3°C | 0.4°C | 36 mm | 51% | 4 m/s | 6.4 |
| 2000 | 19.5°C | 12.6°C | 5.7°C | 31.0°C | -2.7°C | 73 mm | 54% | 3.5 m/s | 5.8 |
| 1999 | 17.6°C | 11.6°C | 5.5°C | 29.6°C | -0.3°C | 144 mm | 66% | 4.4 m/s | 5.2 |
| 1998 | 21.2°C | 14.0°C | 6.8°C | 28.1°C | 0.3°C | 24 mm | 52% | 3.6 m/s | 6.2 |
| 1997 | 18.4°C | 11.1°C | 3.9°C | 30.7°C | -2.1°C | 13 mm | 54% | 3.9 m/s | 6.2 |
| 1996 | 16.4°C | 10.1°C | 3.8°C | 25.0°C | -3.0°C | 50 mm | 63% | 3.1 m/s | 5.4 |
| 1995 | 17.3°C | 10.9°C | 4.5°C | 30.5°C | -1.7°C | 57 mm | 65% | 3 m/s | 5.3 |
| 1994 | 21.5°C | 14.1°C | 6.7°C | 30.0°C | -2.8°C | 47 mm | 55% | 3.7 m/s | 6.2 |
| 1993 | 20.3°C | 13.1°C | 5.9°C | 31.2°C | -0.4°C | 35 mm | 50% | 3.5 m/s | 5.9 |
| 1992 | 20.8°C | 13.4°C | 6.0°C | 32.3°C | -2.1°C | 63 mm | 55% | 3.8 m/s | 5.7 |
| 1991 | 20.4°C | 13.7°C | 7.0°C | 30.7°C | -4.4°C | 77 mm | 61% | 3.6 m/s | 5.5 |
| 1990 | 18.2°C | 11.5°C | 4.8°C | 28.3°C | -3.4°C | 49 mm | 56% | 3.8 m/s | 5.8 |
| 1989 | 21.0°C | 13.9°C | 6.9°C | 29.2°C | -2.1°C | 41 mm | 50% | 3.6 m/s | 6.1 |
| 1988 | 23.1°C | 15.8°C | 8.4°C | 35.3°C | -1.1°C | 57 mm | 54% | 4 m/s | 5.7 |
| 1987 | 23.0°C | 15.7°C | 8.4°C | 31.5°C | 0.7°C | 65 mm | 53% | 3.5 m/s | 5.7 |
| 1986 | 20.2°C | 12.9°C | 5.7°C | 32.2°C | -3.9°C | 99 mm | 61% | 4.2 m/s | 6 |
| 1985 | 21.4°C | 14.4°C | 7.4°C | 30.3°C | 0.5°C | 70 mm | 56% | 3.6 m/s | 5.6 |
| 1984 | 18.9°C | 11.5°C | 4.1°C | 35.2°C | -4.3°C | 20 mm | 49% | 3.9 m/s | 5.6 |
| 1983 | 16.9°C | 10.0°C | 3.0°C | 28.9°C | -5.7°C | 51 mm | 59% | 3.5 m/s | — |
| 1982 | 17.2°C | 11.1°C | 5.0°C | 29.9°C | -3.7°C | 74 mm | 65% | 3.6 m/s | — |
| 1981 | 20.2°C | 12.9°C | 5.7°C | 29.8°C | -4.5°C | 38 mm | 55% | 4 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 19.3°C with lows near 5.7°C (mean 12.5°C), based on 45 years of NASA POWER data.
May averages 67 mm of rainfall in Estevan, a relatively wet time of year. The wettest on record was 172 mm in 2011.
The hottest May reached 35.3°C in 1988. The coldest dipped to -6.6°C in 2004.
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 18.9°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 Estevan and a relatively wet time of year, so plan for around 19.3°C daytime highs and 5.7°C at night.
Not quite — May is the 8th coolest month in Estevan, averaging 12.5°C.
For May in Estevan, pack warm layers and a jacket for chilly mornings, with typical highs of 19.3°C and lows of 5.7°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 4.4 m/s (1999).
The wettest May on record was 2011 with 172 mm. On average, May sees 67 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 Estevan 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.
