June is one of the warmer months of the year in Oakville, with average highs near 20.5°C and lows around 13.2°C (mean 16.9°C). It is a relatively wet time of year, averaging 67 mm of rainfall and 74% relative humidity across the period.
June is one of the warmer months of the year in Oakville. Across 45 years of records, the warmest June in Oakville was 2005 — when the month averaged 21.4°C — while the coldest was 1982 at 13°C. Typical June days reach 20.5°C with nights near 13.2°C. The long-term trend is warming, about 1°C per decade.
June is a relatively wet time of year in Oakville, averaging 67 mm of rainfall. The wettest June on record was 2000 with 176 mm, while the driest was 1988 at 16 mm.
Relative humidity in Oakville during June averages 74%. The most humid June was 2000 at 83%, and the least humid was 1988 at 61%.
June receives about 6 kWh/m²/day of solar energy in Oakville. The sunniest June was 2020 at 7.2 kWh/m²/day, and the cloudiest was 1996 at 5.
Average wind speed in Oakville during June is 2.9 m/s. The windiest Junes were 1988, 2012 and 2021 at 3.4 m/s, while the calmest was 2001 at 2.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.1°C | 16.1°C | 17.1°C | 17.8°C | 18.8°C | +3.7°C |
| Avg High | 19.0°C | 20.1°C | 20.5°C | 21.1°C | 22.3°C | +3.3°C |
| Avg Low | 11.2°C | 12.0°C | 13.6°C | 14.4°C | 15.2°C | +4°C |
| Avg Rain | 63 mm | 60 mm | 72 mm | 84 mm | 52 mm | -11 mm |
June temperatures in Oakville have risen by about 3.9°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 4.1°C (1990) to a record high of 30.5°C (1994).
Rainfall in June is a relatively wet time of year, averaging 67 mm, with a wettest year of 176 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 1.1°C per decade, narrowing the gap between day and night.
One of the best times to visit Oakville
June is one of the best times to visit Oakville. Expect days averaging 20.5°C and nights around 13.2°C (mean 16.9°C) — warmer than Oakville's yearly average — with moderate rainfall (67 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.6°C | 18.1°C | 14.6°C | 27.7°C | 6.8°C | 38 mm | 75% | 3.1 m/s | 6 |
| 2024 | 22.6°C | 19.3°C | 16.0°C | 29.3°C | 12.1°C | 66 mm | 75% | 3 m/s | 5.6 |
| 2023 | 22.0°C | 18.8°C | 15.5°C | 28.5°C | 12.5°C | 65 mm | 72% | 3 m/s | 5.7 |
| 2022 | 22.1°C | 18.1°C | 14.0°C | 29.1°C | 9.3°C | 57 mm | 69% | 3.1 m/s | 6.5 |
| 2021 | 23.0°C | 19.5°C | 16.1°C | 27.0°C | 12.3°C | 48 mm | 70% | 3.4 m/s | 6.2 |
| 2020 | 22.8°C | 19.0°C | 15.1°C | 29.0°C | 8.5°C | 40 mm | 69% | 2.9 m/s | 7.2 |
| 2019 | 19.0°C | 15.7°C | 12.3°C | 26.5°C | 6.0°C | 89 mm | 76% | 2.7 m/s | 6.1 |
| 2018 | 21.5°C | 18.2°C | 14.9°C | 27.8°C | 9.6°C | 66 mm | 74% | 3 m/s | 6 |
| 2017 | 20.9°C | 17.7°C | 14.6°C | 26.3°C | 9.1°C | 89 mm | 78% | 3.2 m/s | 5.9 |
| 2016 | 22.2°C | 18.5°C | 14.8°C | 27.6°C | 8.8°C | 36 mm | 67% | 3.3 m/s | 6.9 |
| 2015 | 19.7°C | 16.4°C | 13.2°C | 24.2°C | 8.3°C | 126 mm | 79% | 2.9 m/s | 5.8 |
| 2014 | 21.5°C | 17.8°C | 14.2°C | 26.6°C | 9.5°C | 71 mm | 77% | 2.6 m/s | 6.1 |
| 2013 | 20.3°C | 17.3°C | 14.3°C | 28.1°C | 8.1°C | 99 mm | 78% | 2.8 m/s | 5.7 |
| 2012 | 23.1°C | 19.6°C | 16.0°C | 28.4°C | 10.4°C | 69 mm | 72% | 3.4 m/s | 6.2 |
| 2011 | 20.8°C | 17.6°C | 14.3°C | 25.9°C | 7.8°C | 77 mm | 78% | 3.1 m/s | 6.1 |
| 2010 | 21.9°C | 18.8°C | 15.7°C | 25.6°C | 10.1°C | 116 mm | 76% | 3.2 m/s | 5.6 |
| 2009 | 20.0°C | 16.7°C | 13.5°C | 28.7°C | 7.0°C | 74 mm | 76% | 2.6 m/s | 5.8 |
| 2008 | 20.7°C | 17.7°C | 14.6°C | 26.8°C | 8.8°C | 85 mm | 81% | 3 m/s | 5.6 |
| 2007 | 23.3°C | 19.5°C | 15.6°C | 28.6°C | 8.6°C | 34 mm | 67% | 3 m/s | 6.9 |
| 2006 | 22.2°C | 18.9°C | 15.7°C | 26.8°C | 9.4°C | 53 mm | 72% | 3.1 m/s | 5.9 |
| 2005 🔥 | 24.7°C | 21.4°C | 18.0°C | 30.4°C | 13.1°C | 35 mm | 73% | 2.8 m/s | 6.2 |
| 2004 | 19.1°C | 16.0°C | 13.0°C | 23.0°C | 8.1°C | 71 mm | 78% | 3 m/s | 6.1 |
| 2003 | 17.6°C | 13.6°C | 9.6°C | 25.7°C | 4.5°C | 68 mm | 80% | 2.9 m/s | 6 |
| 2002 | 18.3°C | 14.8°C | 11.3°C | 25.3°C | 5.2°C | 64 mm | 82% | 2.6 m/s | 5.7 |
| 2001 | 19.8°C | 15.7°C | 11.6°C | 27.7°C | 6.6°C | 62 mm | 77% | 2.4 m/s | 5.9 |
| 2000 🌧️ | 19.5°C | 16.4°C | 13.3°C | 24.2°C | 9.5°C | 176 mm | 83% | 3.3 m/s | 5.1 |
| 1999 | 21.3°C | 17.3°C | 13.3°C | 27.4°C | 8.4°C | 62 mm | 71% | 2.6 m/s | 6.1 |
| 1998 | 21.9°C | 18.3°C | 14.8°C | 28.2°C | 7.9°C | 73 mm | 73% | 3 m/s | 5.7 |
| 1997 | 21.9°C | 18.1°C | 14.2°C | 26.7°C | 9.4°C | 62 mm | 73% | 2.6 m/s | 6.3 |
| 1996 | 19.1°C | 15.1°C | 11.2°C | 24.0°C | 7.6°C | 70 mm | 81% | 2.5 m/s | 5 |
| 1995 | 20.9°C | 16.8°C | 12.6°C | 30.3°C | 7.9°C | 29 mm | 72% | 2.6 m/s | 6.2 |
| 1994 | 20.0°C | 15.5°C | 10.9°C | 30.5°C | 4.1°C | 67 mm | 73% | 2.8 m/s | 5.9 |
| 1993 | 17.9°C | 13.8°C | 9.8°C | 21.4°C | 4.4°C | 110 mm | 77% | 2.9 m/s | 5.9 |
| 1992 | 18.5°C | 14.3°C | 10.0°C | 24.1°C | 4.5°C | 41 mm | 69% | 2.6 m/s | 6.3 |
| 1991 | 21.3°C | 17.0°C | 12.7°C | 26.8°C | 7.0°C | 26 mm | 70% | 2.6 m/s | 6.6 |
| 1990 | 18.4°C | 14.4°C | 10.4°C | 26.9°C | 4.1°C | 58 mm | 77% | 3.2 m/s | 5.6 |
| 1989 | 19.2°C | 15.5°C | 11.8°C | 27.8°C | 8.4°C | 88 mm | 78% | 2.6 m/s | 5.4 |
| 1988 | 19.3°C | 14.6°C | 9.9°C | 25.4°C | 5.3°C | 16 mm | 61% | 3.4 m/s | 6.5 |
| 1987 | 21.3°C | 17.3°C | 13.2°C | 27.6°C | 7.7°C | 50 mm | 68% | 3 m/s | 6 |
| 1986 | 18.1°C | 14.1°C | 10.2°C | 22.7°C | 6.5°C | 66 mm | 72% | 3.2 m/s | 6.2 |
| 1985 | 17.4°C | 13.6°C | 9.9°C | 21.9°C | 5.4°C | 49 mm | 73% | 3.1 m/s | 6.4 |
| 1984 | 18.9°C | 15.1°C | 11.2°C | 22.9°C | 7.1°C | 75 mm | 77% | 3.1 m/s | 5.8 |
| 1983 | 20.4°C | 16.2°C | 12.0°C | 26.9°C | 4.6°C | 31 mm | 74% | 2.5 m/s | — |
| 1982 ❄️ | 16.6°C | 13.0°C | 9.5°C | 22.4°C | 5.9°C | 104 mm | 81% | 2.6 m/s | — |
| 1981 | 20.0°C | 16.4°C | 12.8°C | 24.3°C | 6.5°C | 86 mm | 76% | 3.3 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 20.5°C with lows near 13.2°C (mean 16.9°C), based on 45 years of NASA POWER data.
June averages 67 mm of rainfall in Oakville, a relatively wet time of year. The wettest on record was 176 mm in 2000.
The hottest June reached 30.5°C in 1994. The coldest dipped to 4.1°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 3.9°C. Daytime highs moved from 18.7°C to 22.3°C and overnight lows from 11.1°C to 15.2°C over the same span.
June is one of the warmer months of the year in Oakville and a relatively wet time of year, so plan for around 20.5°C daytime highs and 13.2°C at night.
Not quite — June is the 9th coolest month in Oakville, averaging 16.9°C.
For June in Oakville, pack light layers you can adjust through the day, with typical highs of 20.5°C and lows of 13.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 74% — moderately humid.
Average wind speed in June is 2.9 m/s. The windiest June on record averaged 3.4 m/s (1988).
The wettest June on record was 2000 with 176 mm. On average, June 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 Oakville behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
