July is one of the warmer months of the year in Oak Park, with average highs near 24.4°C and lows around 19°C (mean 21.7°C). It is a relatively wet time of year, averaging 100 mm of rainfall and 79% relative humidity across the period.
July is one of the warmer months of the year in Oak Park. Across 45 years of records, the warmest July in Oak Park was 2012 — when the month averaged 25.8°C — while the coldest was 1996 at 18.4°C. Typical July days reach 24.4°C with nights near 19°C. The long-term trend is warming, about 0.7°C per decade.
July is a relatively wet time of year in Oak Park, averaging 100 mm of rainfall. The wettest July on record was 2023 with 177 mm, while the driest was 1991 at 37 mm.
Relative humidity in Oak Park during July averages 79%. The most humid July was 1993 at 88%, and the least humid was 1988 at 67%.
July receives about 6 kWh/m²/day of solar energy in Oak Park. The sunniest Julys were 2007 and 2019 at 6.6 kWh/m²/day, and the cloudiest was 1992 at 4.6.
Average wind speed in Oak Park during July is 3.1 m/s. The windiest July was 1991 at 3.5 m/s, while the calmest were 2011 and 2023 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.6°C | 20.8°C | 21.8°C | 22.7°C | 23.0°C | +2.4°C |
| Avg High | 23.6°C | 23.5°C | 24.6°C | 25.2°C | 25.6°C | +2°C |
| Avg Low | 17.6°C | 18.0°C | 19.0°C | 20.2°C | 20.5°C | +2.9°C |
| Avg Rain | 107 mm | 93 mm | 93 mm | 104 mm | 110 mm | +3 mm |
July temperatures in Oak Park have risen by about 2.7°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 11.4°C (1982) to a record high of 34.7°C (2012).
Rainfall in July is a relatively wet time of year, averaging 100 mm, with a wettest year of 177 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.6°C per decade while lows rose 0.9°C per decade, narrowing the gap between day and night.
One of the best times to visit Oak Park
July is one of the best times to visit Oak Park. Expect days averaging 24.4°C and nights around 19°C (mean 21.7°C) — warmer than Oak Park's yearly average — with higher rainfall (100 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 | 26.6°C | 24.2°C | 21.8°C | 30.5°C | 18.5°C | 113 mm | 77% | 3 m/s | 5.7 |
| 2024 | 25.2°C | 22.6°C | 20.1°C | 29.6°C | 15.9°C | 131 mm | 76% | 2.7 m/s | 6 |
| 2023 🌧️ | 25.0°C | 22.3°C | 19.6°C | 30.3°C | 16.9°C | 177 mm | 75% | 2.6 m/s | 6.2 |
| 2022 | 25.2°C | 22.7°C | 20.1°C | 28.6°C | 17.8°C | 137 mm | 77% | 3.3 m/s | 5.9 |
| 2021 | 24.6°C | 22.2°C | 19.7°C | 29.7°C | 16.3°C | 41 mm | 78% | 3.3 m/s | 5.4 |
| 2020 | 26.7°C | 24.3°C | 21.9°C | 30.4°C | 20.1°C | 59 mm | 78% | 3.2 m/s | 6.4 |
| 2019 | 25.0°C | 22.7°C | 20.3°C | 28.3°C | 17.4°C | 104 mm | 82% | 3.1 m/s | 6.6 |
| 2018 | 24.8°C | 22.4°C | 20.0°C | 28.9°C | 16.7°C | 61 mm | 80% | 3 m/s | 6.4 |
| 2017 | 24.5°C | 22.1°C | 19.8°C | 28.4°C | 17.0°C | 158 mm | 82% | 2.9 m/s | 6.2 |
| 2016 | 25.6°C | 23.4°C | 21.1°C | 29.7°C | 16.9°C | 134 mm | 79% | 3 m/s | 5.9 |
| 2015 | 23.9°C | 21.2°C | 18.6°C | 28.4°C | 13.2°C | 78 mm | 80% | 3 m/s | 5.8 |
| 2014 | 22.5°C | 19.8°C | 17.1°C | 26.2°C | 12.9°C | 59 mm | 79% | 3.2 m/s | 6.3 |
| 2013 | 24.2°C | 21.8°C | 19.5°C | 30.6°C | 13.7°C | 53 mm | 81% | 3.1 m/s | 5.9 |
| 2012 🔥 | 29.1°C | 25.8°C | 22.6°C | 34.7°C | 20.2°C | 85 mm | 69% | 3 m/s | 6.4 |
| 2011 | 26.2°C | 23.9°C | 21.6°C | 32.0°C | 18.0°C | 134 mm | 82% | 2.6 m/s | 6.1 |
| 2010 | 26.6°C | 24.2°C | 21.8°C | 29.1°C | 16.5°C | 171 mm | 80% | 3.3 m/s | 6.3 |
| 2009 | 22.5°C | 19.9°C | 17.3°C | 25.9°C | 15.1°C | 56 mm | 79% | 3 m/s | 5.5 |
| 2008 | 24.5°C | 21.8°C | 19.0°C | 28.1°C | 14.9°C | 107 mm | 81% | 3.2 m/s | 6.5 |
| 2007 | 24.7°C | 21.9°C | 19.1°C | 29.2°C | 16.0°C | 106 mm | 74% | 3.3 m/s | 6.6 |
| 2006 | 26.4°C | 23.6°C | 20.8°C | 32.0°C | 17.0°C | 110 mm | 77% | 3.3 m/s | 5.8 |
| 2005 | 26.6°C | 23.7°C | 20.9°C | 34.0°C | 16.6°C | 61 mm | 73% | 3.4 m/s | 6.2 |
| 2004 | 23.4°C | 20.9°C | 18.4°C | 28.2°C | 15.0°C | 86 mm | 80% | 3.3 m/s | 5.7 |
| 2003 | 23.5°C | 20.3°C | 17.2°C | 28.3°C | 15.4°C | 151 mm | 77% | 3.1 m/s | 6.1 |
| 2002 | 26.2°C | 23.4°C | 20.6°C | 29.9°C | 17.1°C | 46 mm | 76% | 3.2 m/s | 6.3 |
| 2001 | 25.3°C | 22.1°C | 19.0°C | 30.7°C | 12.2°C | 86 mm | 75% | 2.8 m/s | 6.3 |
| 2000 | 22.9°C | 20.5°C | 18.1°C | 26.1°C | 16.4°C | 115 mm | 81% | 3.3 m/s | 5.7 |
| 1999 | 26.7°C | 23.8°C | 21.0°C | 32.4°C | 17.1°C | 68 mm | 78% | 3.3 m/s | 6.4 |
| 1998 | 25.2°C | 22.7°C | 20.2°C | 29.7°C | 18.0°C | 76 mm | 75% | 3.1 m/s | 6.4 |
| 1997 | 23.6°C | 20.7°C | 17.7°C | 30.4°C | 13.9°C | 76 mm | 80% | 3.2 m/s | 6.2 |
| 1996 ❄️ | 21.2°C | 18.4°C | 15.5°C | 24.7°C | 11.7°C | 154 mm | 80% | 2.8 m/s | 5.9 |
| 1995 | 24.9°C | 22.1°C | 19.3°C | 28.9°C | 13.8°C | 101 mm | 80% | 3 m/s | 6.2 |
| 1994 | 22.6°C | 19.9°C | 17.2°C | 25.4°C | 13.0°C | 72 mm | 83% | 3.2 m/s | 5.7 |
| 1993 | 22.7°C | 20.3°C | 17.9°C | 25.3°C | 13.1°C | 101 mm | 88% | 3.3 m/s | 5.5 |
| 1992 | 21.5°C | 18.7°C | 16.0°C | 26.4°C | 14.0°C | 136 mm | 83% | 3.3 m/s | 4.6 |
| 1991 | 25.2°C | 22.2°C | 19.2°C | 30.5°C | 16.5°C | 37 mm | 73% | 3.5 m/s | 6.5 |
| 1990 | 21.5°C | 18.8°C | 16.2°C | 25.2°C | 13.1°C | 106 mm | 84% | 3.4 m/s | 5.6 |
| 1989 | 23.5°C | 20.8°C | 18.2°C | 30.0°C | 16.5°C | 118 mm | 81% | 2.9 m/s | 5.8 |
| 1988 | 26.3°C | 22.8°C | 19.2°C | 31.3°C | 14.5°C | 72 mm | 67% | 2.7 m/s | 6.1 |
| 1987 | 24.8°C | 21.8°C | 18.7°C | 28.9°C | 14.6°C | 98 mm | 81% | 2.8 m/s | 5.7 |
| 1986 | 22.7°C | 19.6°C | 16.4°C | 26.2°C | 11.5°C | 130 mm | 87% | 3 m/s | 6 |
| 1985 | 23.6°C | 20.4°C | 17.2°C | 27.5°C | 13.0°C | 105 mm | 75% | 3.3 m/s | 5.8 |
| 1984 | 21.7°C | 18.5°C | 15.3°C | 25.7°C | 11.8°C | 63 mm | 78% | 2.9 m/s | 5.8 |
| 1983 | 23.5°C | 20.7°C | 17.8°C | 27.9°C | 12.1°C | 105 mm | 86% | 2.8 m/s | — |
| 1982 | 22.2°C | 19.3°C | 16.4°C | 26.8°C | 11.4°C | 155 mm | 86% | 2.9 m/s | — |
| 1981 | 24.0°C | 21.5°C | 19.1°C | 29.2°C | 16.3°C | 117 mm | 79% | 3.3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 24.4°C with lows near 19°C (mean 21.7°C), based on 45 years of NASA POWER data.
July averages 100 mm of rainfall in Oak Park, a relatively wet time of year. The wettest on record was 177 mm in 2023.
The hottest July reached 34.7°C in 2012. The coldest dipped to 11.4°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.7°C. Daytime highs moved from 23°C to 25.3°C and overnight lows from 17.2°C to 20.3°C over the same span.
July is one of the warmer months of the year in Oak Park and a relatively wet time of year, so plan for around 24.4°C daytime highs and 19°C at night.
Not quite — July is the 11th coolest month in Oak Park, averaging 21.7°C.
For July in Oak Park, pack light layers you can adjust through the day, with typical highs of 24.4°C and lows of 19°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 79% — quite humid.
Average wind speed in July is 3.1 m/s. The windiest July on record averaged 3.5 m/s (1991).
The wettest July on record was 2023 with 177 mm. On average, July sees 100 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 Oak Park behaves each July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
