May is one of the warmer months of the year in Thompson, with average highs near 12.7°C and lows around 0.8°C (mean 6.8°C). It is a relatively wet time of year, averaging 61 mm of rainfall and 74% relative humidity across the period.
May is one of the warmer months of the year in Thompson. Across 45 years of records, the warmest May in Thompson was 2023 — when the month averaged 10.8°C — while the coldest was 1983 at 0.9°C. Typical May days reach 12.7°C with nights near 0.8°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in Thompson, averaging 61 mm of rainfall. The wettest May on record was 1982 with 105 mm, while the driest was 1981 at 11 mm.
Relative humidity in Thompson during May averages 74%. The most humid May was 1983 at 81%, and the least humid was 2003 at 66%.
May receives about 5.4 kWh/m²/day of solar energy in Thompson. The sunniest Mays were 2003 and 2013 at 6.2 kWh/m²/day, and the cloudiest were 2006 and 2024 at 4.5.
Average wind speed in Thompson during May is 0.5 m/s. The windiest Mays were 2016, 2020 and 2022, among others at 0.6 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.0°C | 6.8°C | 6.2°C | 6.9°C | 6.8°C | -0.2°C |
| Avg High | 13.0°C | 13.0°C | 12.1°C | 13.0°C | 12.5°C | -0.5°C |
| Avg Low | 0.9°C | 0.7°C | 0.4°C | 0.9°C | 1.0°C | +0.1°C |
| Avg Rain | 68 mm | 54 mm | 65 mm | 46 mm | 78 mm | +9 mm |
May temperatures in Thompson have risen by about 1.3°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -12.7°C (1989) to a record high of 31.1°C (2018).
Rainfall in May is a relatively wet time of year, averaging 61 mm, with a wettest year of 105 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 Thompson
May is a good time to visit Thompson, with days averaging 12.7°C and nights around 0.8°C (mean 6.8°C, warmer than Thompson'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 | 15.9°C | 9.2°C | 2.4°C | 27.0°C | -5.5°C | 40 mm | 72% | 0.5 m/s | 5.9 |
| 2024 | 11.4°C | 6.6°C | 1.8°C | 24.1°C | -3.2°C | 90 mm | 81% | 0.5 m/s | 4.5 |
| 2023 🔥 | 17.3°C | 10.8°C | 4.2°C | 24.7°C | -2.0°C | 79 mm | 76% | 0.5 m/s | 5.5 |
| 2022 | 10.6°C | 5.6°C | 0.6°C | 21.0°C | -5.0°C | 87 mm | 80% | 0.6 m/s | 4.7 |
| 2021 | 9.3°C | 4.0°C | -1.4°C | 20.7°C | -8.8°C | 70 mm | 81% | 0.5 m/s | 5 |
| 2020 | 10.2°C | 4.3°C | -1.7°C | 23.4°C | -12.2°C | 100 mm | 79% | 0.6 m/s | 6 |
| 2019 | 10.6°C | 4.9°C | -0.8°C | 21.8°C | -5.9°C | 60 mm | 75% | 0.5 m/s | 5.5 |
| 2018 | 14.9°C | 8.2°C | 1.4°C | 31.1°C | -5.3°C | 34 mm | 72% | 0.5 m/s | 5.8 |
| 2017 | 11.4°C | 6.4°C | 1.5°C | 22.2°C | -3.7°C | 54 mm | 80% | 0.5 m/s | 5 |
| 2016 | 15.3°C | 8.9°C | 2.6°C | 25.4°C | -7.5°C | 68 mm | 76% | 0.6 m/s | 5.2 |
| 2015 | 12.7°C | 6.1°C | -0.5°C | 25.6°C | -6.9°C | 47 mm | 69% | 0.5 m/s | 5.9 |
| 2014 | 12.6°C | 7.2°C | 1.9°C | 28.2°C | -4.9°C | 63 mm | 75% | 0.5 m/s | 5.5 |
| 2013 | 14.8°C | 8.1°C | 1.4°C | 21.9°C | -11.6°C | 30 mm | 71% | 0.5 m/s | 6.2 |
| 2012 | 12.8°C | 6.8°C | 0.7°C | 24.0°C | -3.9°C | 32 mm | 73% | 0.6 m/s | 5.5 |
| 2011 | 12.5°C | 6.3°C | 0.1°C | 24.2°C | -8.7°C | 25 mm | 74% | 0.6 m/s | 5.6 |
| 2010 | 12.0°C | 6.5°C | 0.9°C | 24.5°C | -5.4°C | 47 mm | 74% | 0.6 m/s | 5 |
| 2009 | 8.6°C | 2.9°C | -2.7°C | 20.6°C | -8.8°C | 75 mm | 73% | 0.6 m/s | 5.1 |
| 2008 | 11.2°C | 5.6°C | 0.0°C | 23.3°C | -6.5°C | 23 mm | 72% | 0.5 m/s | 5.7 |
| 2007 | 13.9°C | 8.0°C | 2.0°C | 21.0°C | -5.5°C | 71 mm | 75% | 0.6 m/s | 5.3 |
| 2006 | 12.3°C | 7.3°C | 2.3°C | 27.1°C | -5.7°C | 92 mm | 78% | 0.6 m/s | 4.5 |
| 2005 | 13.6°C | 7.6°C | 1.6°C | 25.6°C | -9.7°C | 79 mm | 74% | 0.5 m/s | 5.7 |
| 2004 | 8.4°C | 2.4°C | -3.6°C | 20.3°C | -10.2°C | 69 mm | 71% | 0.5 m/s | 5.7 |
| 2003 | 17.2°C | 10.0°C | 2.9°C | 24.3°C | -9.0°C | 16 mm | 66% | 0.6 m/s | 6.2 |
| 2002 | 8.5°C | 2.8°C | -2.9°C | 22.5°C | -10.1°C | 44 mm | 74% | 0.6 m/s | 6 |
| 2001 | 14.7°C | 8.9°C | 3.2°C | 23.0°C | -3.7°C | 83 mm | 75% | 0.6 m/s | 5 |
| 2000 | 12.1°C | 6.7°C | 1.3°C | 20.4°C | -4.6°C | 97 mm | 77% | 0.5 m/s | 4.9 |
| 1999 | 15.2°C | 9.2°C | 3.2°C | 25.3°C | -4.9°C | 57 mm | 71% | 0.6 m/s | 5.2 |
| 1998 | 14.1°C | 7.6°C | 1.2°C | 23.7°C | -4.6°C | 62 mm | 73% | 0.5 m/s | 5.5 |
| 1997 | 10.0°C | 4.2°C | -1.6°C | 21.5°C | -7.2°C | 41 mm | 72% | 0.5 m/s | 5.5 |
| 1996 | 11.2°C | 5.4°C | -0.4°C | 24.4°C | -6.9°C | 72 mm | 74% | 0.5 m/s | 5.7 |
| 1995 | 13.6°C | 7.1°C | 0.5°C | 28.4°C | -6.6°C | 36 mm | 71% | 0.5 m/s | 5.8 |
| 1994 | 13.7°C | 7.4°C | 1.2°C | 25.9°C | -5.8°C | 57 mm | 74% | 0.6 m/s | 4.9 |
| 1993 | 13.0°C | 7.0°C | 1.1°C | 26.4°C | -2.8°C | 63 mm | 73% | 0.6 m/s | 5.1 |
| 1992 | 11.8°C | 5.9°C | 0.0°C | 22.6°C | -5.1°C | 61 mm | 75% | 0.5 m/s | 5.4 |
| 1991 | 14.4°C | 8.3°C | 2.3°C | 26.3°C | -7.9°C | 66 mm | 77% | 0.5 m/s | 5.3 |
| 1990 | 12.8°C | 6.3°C | -0.3°C | 26.7°C | -12.7°C | 26 mm | 74% | 0.5 m/s | 5.7 |
| 1989 | 14.5°C | 7.9°C | 1.2°C | 24.9°C | -12.7°C | 65 mm | 74% | 0.6 m/s | 5.5 |
| 1988 | 13.5°C | 7.2°C | 0.9°C | 25.7°C | -7.7°C | 98 mm | 76% | 0.5 m/s | 5 |
| 1987 | 14.7°C | 8.6°C | 2.5°C | 22.9°C | -5.5°C | 48 mm | 72% | 0.5 m/s | 5.2 |
| 1986 | 15.4°C | 9.2°C | 2.9°C | 28.8°C | -10.9°C | 68 mm | 76% | 0.6 m/s | 5.8 |
| 1985 | 13.9°C | 8.1°C | 2.4°C | 21.6°C | -2.1°C | 74 mm | 76% | 0.6 m/s | 5.5 |
| 1984 | 11.2°C | 5.5°C | -0.1°C | 22.9°C | -7.7°C | 47 mm | 74% | 0.5 m/s | 5.8 |
| 1983 ❄️ | 6.2°C | 0.9°C | -4.5°C | 17.8°C | -11.4°C | 98 mm | 81% | 0.5 m/s | — |
| 1982 🌧️ | 13.7°C | 8.1°C | 2.5°C | 23.9°C | -4.3°C | 105 mm | 79% | 0.5 m/s | — |
| 1981 | 14.2°C | 7.1°C | 0.1°C | 26.0°C | -7.5°C | 11 mm | 67% | 0.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 12.7°C with lows near 0.8°C (mean 6.8°C), based on 45 years of NASA POWER data.
May averages 61 mm of rainfall in Thompson, a relatively wet time of year. The wettest on record was 105 mm in 1982.
The hottest May reached 31.1°C in 2018. The coldest dipped to -12.7°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 1.3°C. Daytime highs moved from 11.8°C to 12.9°C and overnight lows from 0.1°C to 1.5°C over the same span.
May is one of the warmer months of the year in Thompson and a relatively wet time of year, so plan for around 12.7°C daytime highs and 0.8°C at night.
Not quite — May is the 8th coolest month in Thompson, averaging 6.8°C.
For May in Thompson, pack warm layers and a jacket for chilly mornings, with typical highs of 12.7°C and lows of 0.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 74% — moderately humid.
Average wind speed in May is 0.5 m/s. The windiest May on record averaged 0.6 m/s (1985).
The wettest May on record was 1982 with 105 mm. On average, May sees 61 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 Thompson 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.
