June is one of the warmer months of the year in Markham, with average highs near 23.8°C and lows around 12.3°C (mean 18.1°C). It is about average for rainfall, averaging 65 mm of rainfall and 69% relative humidity across the period.
June is one of the warmer months of the year in Markham. Across 45 years of records, the warmest June in Markham was 2005 — when the month averaged 21.8°C — while the coldest was 1982 at 14.9°C. Typical June days reach 23.8°C with nights near 12.3°C. The long-term trend is warming, about 0.4°C per decade.
June is about average for rainfall in Markham, averaging 65 mm of rainfall. The wettest June on record was 2000 with 142 mm, while the driest was 1988 at 17 mm.
Relative humidity in Markham during June averages 69%. The most humid June was 2000 at 80%, and the least humid was 1988 at 51%.
June receives about 6 kWh/m²/day of solar energy in Markham. The sunniest June was 2020 at 7.2 kWh/m²/day, and the cloudiest was 1996 at 5.
Average wind speed in Markham during June is 2.7 m/s. The windiest June was 1988 at 3.5 m/s, while the calmest were 1983 and 2009 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.2°C | 18.2°C | 17.8°C | 18.0°C | 19.5°C | +2.3°C |
| Avg High | 23.3°C | 24.1°C | 23.3°C | 23.5°C | 25.3°C | +2°C |
| Avg Low | 11.2°C | 12.3°C | 12.2°C | 12.5°C | 13.7°C | +2.5°C |
| Avg Rain | 55 mm | 66 mm | 67 mm | 76 mm | 55 mm | +0 mm |
June temperatures in Markham have risen by about 3°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 2°C (1983) to a record high of 36.5°C (1995).
Rainfall in June is about average for rainfall, averaging 65 mm, with a wettest year of 142 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit Markham
June is one of the best times to visit Markham. Expect days averaging 23.8°C and nights around 12.3°C (mean 18.1°C) — warmer than Markham's yearly average — with moderate rainfall (65 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 | 25.3°C | 19.6°C | 13.8°C | 33.9°C | 4.8°C | 30 mm | 68% | 2.9 m/s | 6 |
| 2024 | 25.0°C | 19.6°C | 14.3°C | 31.4°C | 9.2°C | 69 mm | 70% | 2.9 m/s | 5.6 |
| 2023 | 24.4°C | 19.0°C | 13.6°C | 31.9°C | 9.1°C | 75 mm | 67% | 2.6 m/s | 5.7 |
| 2022 | 24.5°C | 18.2°C | 11.9°C | 32.6°C | 6.1°C | 69 mm | 65% | 3 m/s | 6.5 |
| 2021 | 26.6°C | 20.9°C | 15.3°C | 31.6°C | 9.3°C | 46 mm | 63% | 3 m/s | 6.2 |
| 2020 | 25.9°C | 19.7°C | 13.5°C | 31.7°C | 5.4°C | 42 mm | 62% | 2.6 m/s | 7.2 |
| 2019 | 21.5°C | 16.2°C | 11.0°C | 28.8°C | 4.0°C | 77 mm | 74% | 2.7 m/s | 6.1 |
| 2018 | 24.4°C | 18.6°C | 12.9°C | 32.7°C | 7.7°C | 59 mm | 69% | 2.7 m/s | 6 |
| 2017 | 22.5°C | 17.5°C | 12.6°C | 28.2°C | 5.9°C | 92 mm | 78% | 2.7 m/s | 5.9 |
| 2016 | 25.0°C | 18.8°C | 12.5°C | 31.5°C | 5.9°C | 38 mm | 62% | 3 m/s | 6.9 |
| 2015 | 22.7°C | 17.1°C | 11.5°C | 27.7°C | 5.8°C | 110 mm | 73% | 2.7 m/s | 5.8 |
| 2014 | 24.6°C | 18.4°C | 12.2°C | 29.4°C | 7.2°C | 57 mm | 72% | 2.5 m/s | 6.1 |
| 2013 | 22.7°C | 17.7°C | 12.7°C | 30.0°C | 5.5°C | 81 mm | 74% | 2.6 m/s | 5.7 |
| 2012 | 25.4°C | 19.7°C | 14.1°C | 33.3°C | 7.9°C | 73 mm | 67% | 3 m/s | 6.2 |
| 2011 | 22.6°C | 17.3°C | 12.0°C | 27.4°C | 5.0°C | 61 mm | 75% | 2.8 m/s | 6.1 |
| 2010 | 23.6°C | 18.5°C | 13.3°C | 30.0°C | 7.1°C | 107 mm | 72% | 3 m/s | 5.6 |
| 2009 | 21.7°C | 16.3°C | 10.9°C | 30.8°C | 3.5°C | 61 mm | 74% | 2.3 m/s | 5.8 |
| 2008 | 23.0°C | 18.0°C | 13.0°C | 28.8°C | 6.4°C | 77 mm | 79% | 2.6 m/s | 5.6 |
| 2007 | 25.4°C | 19.3°C | 13.2°C | 33.7°C | 3.9°C | 35 mm | 64% | 2.6 m/s | 6.9 |
| 2006 | 24.3°C | 18.8°C | 13.3°C | 32.1°C | 6.0°C | 62 mm | 67% | 2.7 m/s | 5.9 |
| 2005 🔥 | 27.5°C | 21.8°C | 16.1°C | 34.6°C | 10.7°C | 37 mm | 66% | 2.4 m/s | 6.2 |
| 2004 | 21.2°C | 15.7°C | 10.2°C | 27.3°C | 4.7°C | 61 mm | 76% | 2.6 m/s | 6.1 |
| 2003 | 22.1°C | 16.3°C | 10.4°C | 32.2°C | 3.5°C | 66 mm | 74% | 2.8 m/s | 6 |
| 2002 | 22.0°C | 16.9°C | 11.9°C | 29.7°C | 4.1°C | 59 mm | 79% | 2.4 m/s | 5.7 |
| 2001 | 23.6°C | 17.9°C | 12.1°C | 29.9°C | 6.3°C | 67 mm | 72% | 2.5 m/s | 5.9 |
| 2000 🌧️ | 21.8°C | 16.5°C | 11.3°C | 27.9°C | 6.7°C | 142 mm | 80% | 2.8 m/s | 5.1 |
| 1999 | 25.3°C | 19.4°C | 13.5°C | 31.5°C | 7.4°C | 69 mm | 65% | 2.6 m/s | 6.1 |
| 1998 | 24.1°C | 18.5°C | 12.9°C | 31.6°C | 4.0°C | 88 mm | 68% | 2.7 m/s | 5.7 |
| 1997 | 24.5°C | 18.3°C | 12.2°C | 29.6°C | 6.6°C | 58 mm | 70% | 2.5 m/s | 6.3 |
| 1996 | 22.2°C | 17.2°C | 12.1°C | 28.4°C | 7.8°C | 89 mm | 79% | 2.4 m/s | 5 |
| 1995 | 26.1°C | 20.0°C | 13.8°C | 36.5°C | 7.7°C | 31 mm | 62% | 2.4 m/s | 6.2 |
| 1994 | 24.4°C | 18.1°C | 11.9°C | 34.6°C | 4.2°C | 85 mm | 68% | 2.9 m/s | 5.9 |
| 1993 | 22.0°C | 16.2°C | 10.5°C | 26.7°C | 3.9°C | 116 mm | 72% | 2.8 m/s | 5.9 |
| 1992 | 22.9°C | 16.6°C | 10.4°C | 29.6°C | 4.2°C | 38 mm | 60% | 2.7 m/s | 6.3 |
| 1991 | 26.1°C | 19.9°C | 13.7°C | 31.8°C | 5.7°C | 23 mm | 60% | 2.6 m/s | 6.6 |
| 1990 | 23.6°C | 17.6°C | 11.6°C | 30.5°C | 4.1°C | 60 mm | 68% | 3.2 m/s | 5.6 |
| 1989 | 23.9°C | 18.3°C | 12.8°C | 31.8°C | 8.2°C | 84 mm | 69% | 2.5 m/s | 5.4 |
| 1988 | 25.0°C | 18.0°C | 11.0°C | 35.2°C | 4.5°C | 17 mm | 51% | 3.5 m/s | 6.5 |
| 1987 | 26.3°C | 19.9°C | 13.5°C | 32.4°C | 6.3°C | 39 mm | 58% | 2.8 m/s | 6 |
| 1986 | 22.8°C | 16.5°C | 10.2°C | 29.4°C | 4.6°C | 50 mm | 62% | 3.2 m/s | 6.2 |
| 1985 | 20.8°C | 15.0°C | 9.2°C | 26.2°C | 3.8°C | 43 mm | 68% | 3 m/s | 6.4 |
| 1984 | 23.4°C | 17.4°C | 11.4°C | 28.0°C | 5.9°C | 50 mm | 70% | 2.9 m/s | 5.8 |
| 1983 | 23.5°C | 17.4°C | 11.3°C | 29.8°C | 2.0°C | 27 mm | 70% | 2.3 m/s | — |
| 1982 ❄️ | 20.0°C | 14.9°C | 9.8°C | 25.9°C | 5.1°C | 108 mm | 76% | 2.5 m/s | — |
| 1981 | 23.6°C | 17.7°C | 11.8°C | 30.6°C | 4.1°C | 77 mm | 70% | 3 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 23.8°C with lows near 12.3°C (mean 18.1°C), based on 45 years of NASA POWER data.
June averages 65 mm of rainfall in Markham, about average for rainfall. The wettest on record was 142 mm in 2000.
The hottest June reached 36.5°C in 1995. The coldest dipped to 2°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 3°C. Daytime highs moved from 22.3°C to 25.2°C and overnight lows from 10.7°C to 13.8°C over the same span.
June is one of the warmer months of the year in Markham and about average for rainfall, so plan for around 23.8°C daytime highs and 12.3°C at night.
Not quite — June is the 10th coolest month in Markham, averaging 18.1°C.
For June in Markham, pack light layers you can adjust through the day, with typical highs of 23.8°C and lows of 12.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 69% — moderately humid.
Average wind speed in June is 2.7 m/s. The windiest June on record averaged 3.5 m/s (1988).
The wettest June on record was 2000 with 142 mm. On average, June sees 65 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 Markham 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.
