June is one of the warmer months of the year in Downers Grove, with average highs near 26.1°C and lows around 14.4°C (mean 20.3°C). It is a relatively wet time of year, averaging 106 mm of rainfall and 73% relative humidity across the period.
June is one of the warmer months of the year in Downers Grove. Across 45 years of records, the warmest June in Downers Grove was 2005 — when the month averaged 23.9°C — while the coldest was 1982 at 16.3°C. Typical June days reach 26.1°C with nights near 14.4°C. The long-term trend is warming, about 0.5°C per decade.
June is a relatively wet time of year in Downers Grove, averaging 106 mm of rainfall. The wettest June on record was 1993 with 247 mm, while the driest was 1988 at 30 mm.
Relative humidity in Downers Grove during June averages 73%. The most humid June was 2018 at 82%, and the least humid was 1988 at 53%.
June receives about 6.1 kWh/m²/day of solar energy in Downers Grove. The sunniest June was 2012 at 7.3 kWh/m²/day, and the cloudiest was 2015 at 5.4.
Average wind speed in Downers Grove during June is 2.8 m/s. The windiest Junes were 1984 and 1990 at 3.5 m/s, while the calmest was 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 | 19.5°C | 19.9°C | 20.2°C | 20.5°C | 21.7°C | +2.2°C |
| Avg High | 25.7°C | 25.7°C | 26.1°C | 26.1°C | 27.8°C | +2.1°C |
| Avg Low | 13.3°C | 14.1°C | 14.4°C | 14.8°C | 15.6°C | +2.3°C |
| Avg Rain | 82 mm | 117 mm | 96 mm | 134 mm | 93 mm | +11 mm |
June temperatures in Downers Grove have risen by about 2.9°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 1.8°C (2003) to a record high of 38.9°C (1988).
Rainfall in June is a relatively wet time of year, averaging 106 mm, with a wettest year of 247 mm.
One of the best times to visit Downers Grove
June is one of the best times to visit Downers Grove. Expect days averaging 26.1°C and nights around 14.4°C (mean 20.3°C) — warmer than Downers Grove's yearly average — with higher rainfall (106 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 | 28.7°C | 22.6°C | 16.5°C | 35.1°C | 7.4°C | 93 mm | 73% | 2.8 m/s | 6.4 |
| 2024 | 27.6°C | 21.9°C | 16.2°C | 32.8°C | 9.1°C | 122 mm | 73% | 3.2 m/s | 6.4 |
| 2023 | 27.4°C | 20.5°C | 13.6°C | 34.0°C | 6.2°C | 42 mm | 62% | 2.6 m/s | 6.4 |
| 2022 | 27.3°C | 21.0°C | 14.7°C | 34.1°C | 9.8°C | 57 mm | 69% | 2.7 m/s | 6.8 |
| 2021 | 28.9°C | 23.0°C | 17.2°C | 33.5°C | 8.8°C | 145 mm | 69% | 2.7 m/s | 6.1 |
| 2020 | 26.8°C | 21.1°C | 15.4°C | 31.7°C | 8.3°C | 96 mm | 75% | 2.7 m/s | 6.7 |
| 2019 | 24.6°C | 19.0°C | 13.4°C | 31.7°C | 7.8°C | 110 mm | 80% | 2.7 m/s | 5.7 |
| 2018 | 25.6°C | 20.6°C | 15.6°C | 31.7°C | 8.1°C | 195 mm | 82% | 2.8 m/s | 5.8 |
| 2017 | 26.5°C | 20.9°C | 15.2°C | 31.3°C | 9.3°C | 112 mm | 73% | 3.1 m/s | 7 |
| 2016 | 27.3°C | 21.4°C | 15.6°C | 32.1°C | 9.1°C | 82 mm | 73% | 2.6 m/s | 6.7 |
| 2015 | 24.9°C | 19.2°C | 13.5°C | 31.6°C | 5.0°C | 177 mm | 78% | 2.7 m/s | 5.4 |
| 2014 | 25.8°C | 20.2°C | 14.5°C | 30.0°C | 8.2°C | 202 mm | 77% | 2.9 m/s | 5.9 |
| 2013 | 24.7°C | 19.5°C | 14.4°C | 29.8°C | 7.6°C | 143 mm | 79% | 2.7 m/s | 5.7 |
| 2012 | 29.4°C | 22.6°C | 15.7°C | 37.4°C | 8.1°C | 31 mm | 59% | 3.1 m/s | 7.3 |
| 2011 | 25.9°C | 20.3°C | 14.7°C | 32.7°C | 9.0°C | 112 mm | 79% | 2.9 m/s | 5.7 |
| 2010 | 26.5°C | 21.2°C | 15.8°C | 30.2°C | 10.7°C | 179 mm | 81% | 2.8 m/s | 5.9 |
| 2009 | 24.8°C | 19.1°C | 13.5°C | 33.4°C | 3.4°C | 141 mm | 79% | 2.7 m/s | 5.7 |
| 2008 | 26.1°C | 20.7°C | 15.2°C | 30.6°C | 10.1°C | 128 mm | 77% | 3.2 m/s | 6.2 |
| 2007 | 26.8°C | 21.2°C | 15.5°C | 32.8°C | 7.0°C | 87 mm | 71% | 2.7 m/s | 6.1 |
| 2006 | 25.7°C | 19.8°C | 13.9°C | 31.4°C | 8.3°C | 87 mm | 69% | 2.6 m/s | 6.2 |
| 2005 🔥 | 30.1°C | 23.9°C | 17.7°C | 36.4°C | 10.9°C | 34 mm | 66% | 2.9 m/s | 6.3 |
| 2004 | 24.8°C | 19.2°C | 13.5°C | 30.6°C | 5.4°C | 104 mm | 76% | 2.6 m/s | 6.3 |
| 2003 | 25.1°C | 18.5°C | 11.9°C | 33.9°C | 1.8°C | 50 mm | 67% | 2.7 m/s | 6.2 |
| 2002 | 26.8°C | 21.1°C | 15.4°C | 33.4°C | 7.3°C | 104 mm | 76% | 2.6 m/s | 5.8 |
| 2001 | 25.6°C | 19.8°C | 14.1°C | 31.7°C | 5.9°C | 74 mm | 73% | 2.6 m/s | 6.1 |
| 2000 | 24.7°C | 18.9°C | 13.2°C | 29.9°C | 6.4°C | 147 mm | 75% | 3.2 m/s | 5.8 |
| 1999 | 26.0°C | 20.7°C | 15.5°C | 31.5°C | 8.0°C | 138 mm | 76% | 2.4 m/s | 5.9 |
| 1998 | 25.4°C | 20.3°C | 15.2°C | 32.3°C | 5.5°C | 140 mm | 76% | 2.7 m/s | 5.7 |
| 1997 | 25.5°C | 19.4°C | 13.3°C | 32.3°C | 6.9°C | 101 mm | 74% | 2.7 m/s | 6.1 |
| 1996 | 24.8°C | 19.3°C | 13.7°C | 31.4°C | 8.4°C | 137 mm | 80% | 2.6 m/s | 5.6 |
| 1995 | 26.1°C | 20.4°C | 14.8°C | 31.9°C | 7.9°C | 55 mm | 74% | 2.3 m/s | 6.2 |
| 1994 | 26.5°C | 20.2°C | 13.8°C | 34.0°C | 5.6°C | 142 mm | 70% | 2.8 m/s | 6.3 |
| 1993 🌧️ | 23.5°C | 18.3°C | 13.1°C | 29.0°C | 3.0°C | 247 mm | 81% | 3.1 m/s | 5.6 |
| 1992 | 25.7°C | 18.9°C | 12.0°C | 32.1°C | 3.9°C | 43 mm | 63% | 2.5 m/s | 6.2 |
| 1991 | 27.4°C | 21.6°C | 15.8°C | 32.5°C | 9.3°C | 33 mm | 71% | 2.6 m/s | 6.8 |
| 1990 | 25.6°C | 19.8°C | 14.0°C | 30.4°C | 3.7°C | 137 mm | 77% | 3.5 m/s | 5.6 |
| 1989 | 25.6°C | 19.4°C | 13.1°C | 32.0°C | 8.4°C | 66 mm | 71% | 2.4 m/s | 6.1 |
| 1988 | 29.0°C | 21.4°C | 13.7°C | 38.9°C | 6.0°C | 30 mm | 53% | 3.3 m/s | 6.7 |
| 1987 | 27.8°C | 21.4°C | 15.1°C | 35.3°C | 7.6°C | 72 mm | 68% | 2.7 m/s | 6.5 |
| 1986 | 24.8°C | 18.7°C | 12.6°C | 30.9°C | 5.4°C | 111 mm | 77% | 3 m/s | 5.6 |
| 1985 | 24.0°C | 18.0°C | 12.0°C | 31.4°C | 6.3°C | 65 mm | 69% | 3.3 m/s | 5.8 |
| 1984 | 25.7°C | 20.0°C | 14.2°C | 29.7°C | 8.9°C | 85 mm | 77% | 3.5 m/s | 6.2 |
| 1983 | 25.8°C | 20.2°C | 14.5°C | 31.2°C | 6.5°C | 93 mm | 75% | 2.8 m/s | — |
| 1982 ❄️ | 22.6°C | 16.3°C | 9.9°C | 28.1°C | 5.2°C | 69 mm | 73% | 2.8 m/s | — |
| 1981 | 25.9°C | 20.2°C | 14.4°C | 30.8°C | 10.1°C | 146 mm | 74% | 3.1 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 26.1°C with lows near 14.4°C (mean 20.3°C), based on 45 years of NASA POWER data.
June averages 106 mm of rainfall in Downers Grove, a relatively wet time of year. The wettest on record was 247 mm in 1993.
The hottest June reached 38.9°C in 1988. The coldest dipped to 1.8°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.9°C. Daytime highs moved from 24.8°C to 28°C and overnight lows from 13°C to 15.6°C over the same span.
June is one of the warmer months of the year in Downers Grove and a relatively wet time of year, so plan for around 26.1°C daytime highs and 14.4°C at night.
Not quite — June is the 10th coolest month in Downers Grove, averaging 20.3°C.
For June in Downers Grove, pack light layers you can adjust through the day, with typical highs of 26.1°C and lows of 14.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 73% — moderately humid.
Average wind speed in June is 2.8 m/s. The windiest June on record averaged 3.5 m/s (1984).
The wettest June on record was 1993 with 247 mm. On average, June sees 106 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 Downers Grove 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.
