June is one of the warmer months of the year in Windsor, with average highs near 24.5°C and lows around 13.5°C (mean 19°C). It is a relatively wet time of year, averaging 87 mm of rainfall and 75% relative humidity across the period.
June is one of the warmer months of the year in Windsor. Across 45 years of records, the warmest June in Windsor was 2005 — when the month averaged 22.3°C — while the coldest was 1985 at 15.7°C. Typical June days reach 24.5°C with nights near 13.5°C. The long-term trend is warming, about 0.5°C per decade.
June is a relatively wet time of year in Windsor, averaging 87 mm of rainfall. The wettest June on record was 2021 with 146 mm, while the driest was 1988 at 17 mm.
Relative humidity in Windsor during June averages 75%. The most humid June was 1996 at 81%, and the least humid was 1988 at 57%.
June receives about 6.2 kWh/m²/day of solar energy in Windsor. The sunniest June was 2020 at 7.3 kWh/m²/day, and the cloudiest was 1996 at 5.3.
Average wind speed in Windsor during June is 2.8 m/s. The windiest Junes were 1988, 1990 and 2000 at 3.4 m/s, while the calmest were 1989, 1992 and 1995 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.1°C | 18.8°C | 19.2°C | 19.1°C | 20.2°C | +2.1°C |
| Avg High | 23.8°C | 24.2°C | 24.6°C | 24.5°C | 25.8°C | +2°C |
| Avg Low | 12.4°C | 13.4°C | 13.8°C | 13.8°C | 14.6°C | +2.2°C |
| Avg Rain | 81 mm | 88 mm | 84 mm | 90 mm | 92 mm | +11 mm |
June temperatures in Windsor have risen by about 2.7°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 3.3°C (2003) to a record high of 36.6°C (1988).
Rainfall in June is a relatively wet time of year, averaging 87 mm, with a wettest year of 146 mm.
One of the best times to visit Windsor
June is one of the best times to visit Windsor. Expect days averaging 24.5°C and nights around 13.5°C (mean 19°C) — warmer than Windsor's yearly average — with higher rainfall (87 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 | 26.1°C | 20.9°C | 15.6°C | 32.6°C | 4.5°C | 105 mm | 76% | 2.8 m/s | 6 |
| 2024 | 26.0°C | 20.6°C | 15.2°C | 31.7°C | 9.3°C | 101 mm | 74% | 2.8 m/s | 6 |
| 2023 | 25.0°C | 19.1°C | 13.2°C | 30.7°C | 8.7°C | 69 mm | 68% | 2.6 m/s | 6.1 |
| 2022 | 25.3°C | 19.4°C | 13.5°C | 31.5°C | 7.6°C | 68 mm | 72% | 2.7 m/s | 6.8 |
| 2021 🌧️ | 26.9°C | 21.7°C | 16.5°C | 31.1°C | 7.7°C | 146 mm | 72% | 2.8 m/s | 6.1 |
| 2020 | 25.5°C | 19.6°C | 13.8°C | 29.8°C | 7.1°C | 61 mm | 73% | 2.6 m/s | 7.3 |
| 2019 | 23.1°C | 17.7°C | 12.4°C | 28.6°C | 4.9°C | 105 mm | 78% | 2.8 m/s | 6 |
| 2018 | 24.6°C | 19.4°C | 14.1°C | 31.2°C | 7.3°C | 85 mm | 79% | 2.8 m/s | 5.9 |
| 2017 | 24.4°C | 19.3°C | 14.2°C | 29.6°C | 8.7°C | 75 mm | 78% | 3.2 m/s | 6.4 |
| 2016 | 25.7°C | 19.8°C | 13.8°C | 31.9°C | 7.0°C | 51 mm | 70% | 2.8 m/s | 6.9 |
| 2015 | 23.6°C | 18.2°C | 12.7°C | 28.5°C | 5.1°C | 137 mm | 79% | 2.9 m/s | 5.6 |
| 2014 | 24.7°C | 19.4°C | 14.1°C | 28.9°C | 7.3°C | 103 mm | 77% | 2.6 m/s | 6.2 |
| 2013 | 23.8°C | 18.8°C | 13.8°C | 29.1°C | 6.6°C | 132 mm | 79% | 2.8 m/s | 5.9 |
| 2012 | 25.9°C | 20.1°C | 14.3°C | 33.7°C | 8.5°C | 42 mm | 71% | 3.1 m/s | 6.7 |
| 2011 | 24.1°C | 18.8°C | 13.5°C | 29.1°C | 9.3°C | 62 mm | 79% | 2.8 m/s | 6.2 |
| 2010 | 25.0°C | 19.9°C | 14.8°C | 28.1°C | 9.3°C | 108 mm | 79% | 3 m/s | 6.1 |
| 2009 | 23.4°C | 17.9°C | 12.3°C | 30.6°C | 4.7°C | 113 mm | 78% | 2.4 m/s | 5.9 |
| 2008 | 24.4°C | 19.7°C | 15.1°C | 29.6°C | 9.4°C | 131 mm | 80% | 3 m/s | 5.6 |
| 2007 | 25.6°C | 20.0°C | 14.4°C | 30.7°C | 7.4°C | 67 mm | 72% | 2.5 m/s | 6.9 |
| 2006 | 24.2°C | 18.8°C | 13.5°C | 29.6°C | 7.5°C | 71 mm | 73% | 2.6 m/s | 6.4 |
| 2005 🔥 | 27.9°C | 22.3°C | 16.7°C | 33.5°C | 10.7°C | 62 mm | 73% | 2.8 m/s | 6.3 |
| 2004 | 23.2°C | 17.9°C | 12.6°C | 28.8°C | 6.6°C | 87 mm | 77% | 2.8 m/s | 6.2 |
| 2003 | 23.7°C | 17.7°C | 11.6°C | 31.0°C | 3.3°C | 63 mm | 74% | 2.8 m/s | 5.9 |
| 2002 | 24.9°C | 19.4°C | 13.9°C | 31.0°C | 7.1°C | 45 mm | 78% | 2.6 m/s | 6.1 |
| 2001 | 24.3°C | 18.9°C | 13.6°C | 29.7°C | 6.9°C | 76 mm | 75% | 2.4 m/s | 6.4 |
| 2000 | 24.1°C | 19.1°C | 14.1°C | 29.3°C | 7.5°C | 124 mm | 75% | 3.4 m/s | 5.6 |
| 1999 | 25.5°C | 20.1°C | 14.6°C | 30.9°C | 6.6°C | 98 mm | 71% | 2.5 m/s | 6.3 |
| 1998 | 24.3°C | 19.3°C | 14.3°C | 31.4°C | 4.9°C | 68 mm | 75% | 2.8 m/s | 5.9 |
| 1997 | 24.1°C | 18.9°C | 13.6°C | 28.4°C | 7.8°C | 72 mm | 77% | 2.8 m/s | 6.3 |
| 1996 | 24.3°C | 19.3°C | 14.2°C | 30.0°C | 7.5°C | 119 mm | 81% | 2.6 m/s | 5.3 |
| 1995 | 24.9°C | 19.5°C | 14.1°C | 32.1°C | 7.7°C | 62 mm | 75% | 2.3 m/s | 6 |
| 1994 | 25.2°C | 19.3°C | 13.4°C | 32.7°C | 3.9°C | 137 mm | 73% | 2.6 m/s | 6 |
| 1993 | 22.5°C | 17.2°C | 11.9°C | 27.2°C | 3.5°C | 127 mm | 80% | 2.9 m/s | 5.5 |
| 1992 | 22.3°C | 16.5°C | 10.8°C | 27.8°C | 4.7°C | 62 mm | 71% | 2.3 m/s | 6.5 |
| 1991 | 25.7°C | 20.0°C | 14.4°C | 29.8°C | 8.8°C | 55 mm | 74% | 2.6 m/s | 6.7 |
| 1990 | 23.3°C | 18.1°C | 12.9°C | 28.1°C | 5.2°C | 83 mm | 78% | 3.4 m/s | 5.8 |
| 1989 | 23.6°C | 18.5°C | 13.4°C | 29.6°C | 7.3°C | 116 mm | 79% | 2.3 m/s | 5.5 |
| 1988 | 26.7°C | 19.4°C | 12.0°C | 36.6°C | 5.4°C | 17 mm | 57% | 3.4 m/s | 7.2 |
| 1987 | 25.6°C | 19.9°C | 14.1°C | 31.4°C | 7.4°C | 98 mm | 72% | 2.7 m/s | 6.3 |
| 1986 | 22.8°C | 17.0°C | 11.2°C | 27.6°C | 4.3°C | 127 mm | 78% | 2.9 m/s | 6.2 |
| 1985 ❄️ | 21.3°C | 15.7°C | 10.2°C | 26.1°C | 6.1°C | 55 mm | 73% | 2.9 m/s | 6.7 |
| 1984 | 24.4°C | 18.9°C | 13.4°C | 27.7°C | 8.1°C | 43 mm | 77% | 3.1 m/s | 5.9 |
| 1983 | 23.8°C | 18.3°C | 12.8°C | 29.1°C | 4.9°C | 94 mm | 77% | 2.4 m/s | — |
| 1982 | 21.3°C | 16.1°C | 10.8°C | 26.4°C | 6.1°C | 92 mm | 78% | 2.8 m/s | — |
| 1981 | 24.3°C | 18.9°C | 13.6°C | 29.7°C | 7.6°C | 89 mm | 76% | 3.2 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 24.5°C with lows near 13.5°C (mean 19°C), based on 45 years of NASA POWER data.
June averages 87 mm of rainfall in Windsor, a relatively wet time of year. The wettest on record was 146 mm in 2021.
The hottest June reached 36.6°C in 1988. The coldest dipped to 3.3°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.7°C. Daytime highs moved from 23°C to 25.9°C and overnight lows from 12.2°C to 14.8°C over the same span.
June is one of the warmer months of the year in Windsor and a relatively wet time of year, so plan for around 24.5°C daytime highs and 13.5°C at night.
Not quite — June is the 10th coolest month in Windsor, averaging 19°C.
For June in Windsor, pack light layers you can adjust through the day, with typical highs of 24.5°C and lows of 13.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 75% — quite humid.
Average wind speed in June is 2.8 m/s. The windiest June on record averaged 3.4 m/s (1988).
The wettest June on record was 2021 with 146 mm. On average, June sees 87 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 Windsor 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.
