June is one of the warmer months of the year in Sudbury, with average highs near 21.7°C and lows around 9.8°C (mean 15.8°C). It is a relatively wet time of year, averaging 79 mm of rainfall and 76% relative humidity across the period.
June is one of the warmer months of the year in Sudbury. Across 45 years of records, the warmest June in Sudbury was 2005 — when the month averaged 19.8°C — while the coldest were 1982, 1985 and 2004 at 13.2°C. Typical June days reach 21.7°C with nights near 9.8°C. The long-term trend is warming, about 0.3°C per decade.
June is a relatively wet time of year in Sudbury, averaging 79 mm of rainfall. The wettest June on record was 1984 with 135 mm, while the driest was 1991 at 25 mm.
Relative humidity in Sudbury during June averages 76%. The most humid June was 2008 at 83%, and the least humid was 1991 at 69%.
June receives about 5.9 kWh/m²/day of solar energy in Sudbury. The sunniest June was 2016 at 6.7 kWh/m²/day, and the cloudiest were 1996, 2000 and 2010 at 5.1.
Average wind speed in Sudbury during June is 0.6 m/s. The windiest Junes were 1986 and 1988 at 0.7 m/s, while the calmest were 2010, 2015 and 2023, 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 | 14.8°C | 16.3°C | 15.8°C | 15.5°C | 16.7°C | +1.9°C |
| Avg High | 20.7°C | 22.5°C | 21.5°C | 21.4°C | 22.7°C | +2°C |
| Avg Low | 8.9°C | 10.1°C | 10.1°C | 9.6°C | 10.7°C | +1.8°C |
| Avg Rain | 82 mm | 70 mm | 74 mm | 81 mm | 93 mm | +11 mm |
June temperatures in Sudbury have risen by about 2.3°C between 1981–1985 and 2021–2025.
June has ranged from a record low of -0.7°C (2003) to a record high of 36.3°C (1995).
Rainfall in June is a relatively wet time of year, averaging 79 mm, with a wettest year of 135 mm.
One of the best times to visit Sudbury
June is one of the best times to visit Sudbury. Expect days averaging 21.7°C and nights around 9.8°C (mean 15.8°C) — warmer than Sudbury's yearly average — with moderate rainfall (79 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 | 22.0°C | 16.2°C | 10.4°C | 29.7°C | 2.4°C | 101 mm | 78% | 0.6 m/s | 5.6 |
| 2024 | 22.2°C | 16.7°C | 11.1°C | 29.3°C | 3.6°C | 89 mm | 77% | 0.6 m/s | 5.5 |
| 2023 | 22.9°C | 17.0°C | 11.2°C | 29.6°C | 5.4°C | 104 mm | 73% | 0.5 m/s | 6 |
| 2022 | 22.0°C | 15.9°C | 9.7°C | 29.7°C | 4.0°C | 64 mm | 74% | 0.6 m/s | 5.9 |
| 2021 | 23.9°C | 17.6°C | 11.4°C | 30.4°C | 3.1°C | 118 mm | 74% | 0.6 m/s | 5.7 |
| 2020 | 23.0°C | 16.7°C | 10.4°C | 29.8°C | 2.8°C | 84 mm | 75% | 0.6 m/s | 6.5 |
| 2019 | 20.1°C | 14.3°C | 8.5°C | 26.2°C | 2.6°C | 100 mm | 79% | 0.6 m/s | 6.2 |
| 2018 | 22.0°C | 15.6°C | 9.2°C | 28.1°C | 2.7°C | 50 mm | 73% | 0.6 m/s | 6.5 |
| 2017 | 20.5°C | 15.3°C | 10.0°C | 26.1°C | 2.7°C | 134 mm | 81% | 0.6 m/s | 5.4 |
| 2016 | 21.9°C | 15.6°C | 9.2°C | 27.8°C | 2.7°C | 35 mm | 74% | 0.6 m/s | 6.7 |
| 2015 | 20.4°C | 14.4°C | 8.5°C | 23.8°C | 2.5°C | 77 mm | 79% | 0.5 m/s | 5.8 |
| 2014 | 21.6°C | 15.5°C | 9.4°C | 26.4°C | 5.8°C | 67 mm | 78% | 0.6 m/s | 6 |
| 2013 | 21.3°C | 15.5°C | 9.6°C | 27.9°C | 2.9°C | 65 mm | 76% | 0.6 m/s | 5.5 |
| 2012 | 23.3°C | 17.2°C | 11.2°C | 29.7°C | 4.8°C | 77 mm | 74% | 0.6 m/s | 5.8 |
| 2011 | 21.6°C | 15.7°C | 9.8°C | 28.3°C | 3.6°C | 107 mm | 76% | 0.6 m/s | 5.4 |
| 2010 | 21.6°C | 16.1°C | 10.5°C | 27.1°C | 4.7°C | 99 mm | 74% | 0.5 m/s | 5.1 |
| 2009 | 20.0°C | 14.7°C | 9.5°C | 27.9°C | 2.3°C | 67 mm | 81% | 0.5 m/s | 5.8 |
| 2008 | 20.7°C | 15.7°C | 10.7°C | 25.5°C | 6.8°C | 93 mm | 83% | 0.6 m/s | 5.3 |
| 2007 | 23.6°C | 17.3°C | 10.9°C | 32.7°C | 1.5°C | 75 mm | 72% | 0.6 m/s | 6.2 |
| 2006 | 22.3°C | 16.7°C | 11.1°C | 29.4°C | 2.9°C | 71 mm | 74% | 0.6 m/s | 6.1 |
| 2005 🔥 | 26.0°C | 19.8°C | 13.6°C | 31.1°C | 8.8°C | 37 mm | 70% | 0.6 m/s | 5.8 |
| 2004 | 19.0°C | 13.2°C | 7.4°C | 24.6°C | 3.6°C | 57 mm | 79% | 0.6 m/s | 6.2 |
| 2003 | 21.1°C | 14.9°C | 8.7°C | 28.3°C | -0.7°C | 99 mm | 77% | 0.6 m/s | 6.4 |
| 2002 | 20.7°C | 15.3°C | 9.9°C | 26.7°C | 0.4°C | 104 mm | 81% | 0.6 m/s | 5.6 |
| 2001 | 21.6°C | 15.9°C | 10.2°C | 27.0°C | 5.6°C | 62 mm | 80% | 0.6 m/s | 6.1 |
| 2000 | 20.0°C | 14.2°C | 8.5°C | 26.9°C | 3.5°C | 71 mm | 77% | 0.6 m/s | 5.1 |
| 1999 | 23.0°C | 16.9°C | 10.9°C | 28.9°C | 3.1°C | 86 mm | 74% | 0.6 m/s | 5.9 |
| 1998 | 21.8°C | 16.1°C | 10.4°C | 29.4°C | 1.2°C | 97 mm | 77% | 0.6 m/s | 5.4 |
| 1997 | 22.9°C | 16.3°C | 9.6°C | 28.1°C | 5.8°C | 58 mm | 76% | 0.5 m/s | 6.4 |
| 1996 | 21.8°C | 16.3°C | 10.8°C | 28.2°C | 4.7°C | 70 mm | 79% | 0.5 m/s | 5.1 |
| 1995 | 24.5°C | 17.8°C | 11.1°C | 36.3°C | 2.7°C | 41 mm | 71% | 0.6 m/s | 6.1 |
| 1994 | 23.3°C | 16.9°C | 10.6°C | 32.4°C | 1.5°C | 94 mm | 73% | 0.6 m/s | 5.8 |
| 1993 | 21.1°C | 14.9°C | 8.7°C | 26.0°C | 2.1°C | 52 mm | 74% | 0.6 m/s | 5.5 |
| 1992 | 21.1°C | 14.7°C | 8.2°C | 27.7°C | 0.4°C | 52 mm | 69% | 0.6 m/s | 6.1 |
| 1991 | 24.0°C | 17.5°C | 11.0°C | 31.3°C | 2.4°C | 25 mm | 69% | 0.6 m/s | 6.5 |
| 1990 | 21.3°C | 15.3°C | 9.3°C | 28.8°C | 1.3°C | 127 mm | 77% | 0.6 m/s | 5.2 |
| 1989 | 20.9°C | 15.6°C | 10.3°C | 27.8°C | 3.6°C | 132 mm | 81% | 0.6 m/s | 5.2 |
| 1988 | 21.4°C | 14.9°C | 8.4°C | 27.6°C | 2.6°C | 42 mm | 71% | 0.7 m/s | 6.4 |
| 1987 | 23.9°C | 17.4°C | 10.9°C | 32.5°C | 3.9°C | 75 mm | 70% | 0.6 m/s | 5.9 |
| 1986 | 19.7°C | 13.5°C | 7.2°C | 26.2°C | -0.1°C | 93 mm | 73% | 0.7 m/s | 6.6 |
| 1985 | 18.9°C | 13.2°C | 7.5°C | 25.2°C | 1.5°C | 47 mm | 78% | 0.6 m/s | 6.4 |
| 1984 🌧️ | 20.9°C | 15.3°C | 9.6°C | 24.1°C | 3.3°C | 135 mm | 80% | 0.6 m/s | 5.5 |
| 1983 | 21.5°C | 15.5°C | 9.6°C | 27.3°C | 1.5°C | 44 mm | 78% | 0.6 m/s | — |
| 1982 ❄️ | 18.8°C | 13.2°C | 7.5°C | 24.4°C | 0.5°C | 67 mm | 77% | 0.6 m/s | — |
| 1981 | 20.7°C | 14.9°C | 9.1°C | 26.7°C | 2.5°C | 102 mm | 79% | 0.6 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 21.7°C with lows near 9.8°C (mean 15.8°C), based on 45 years of NASA POWER data.
June averages 79 mm of rainfall in Sudbury, a relatively wet time of year. The wettest on record was 135 mm in 1984.
The hottest June reached 36.3°C in 1995. The coldest dipped to -0.7°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.3°C. Daytime highs moved from 20.2°C to 22.6°C and overnight lows from 8.7°C to 10.8°C over the same span.
June is one of the warmer months of the year in Sudbury and a relatively wet time of year, so plan for around 21.7°C daytime highs and 9.8°C at night.
Not quite — June is the 10th coolest month in Sudbury, averaging 15.8°C.
For June in Sudbury, pack light layers you can adjust through the day, with typical highs of 21.7°C and lows of 9.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 76% — quite humid.
Average wind speed in June is 0.6 m/s. The windiest June on record averaged 0.7 m/s (1986).
The wettest June on record was 1984 with 135 mm. On average, June sees 79 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 Sudbury 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.
