July is one of the warmer months of the year in Lombard, with average highs near 28.6°C and lows around 17.5°C (mean 23.1°C). It is a relatively wet time of year, averaging 104 mm of rainfall and 72% relative humidity across the period.
July is one of the warmer months of the year in Lombard. Across 45 years of records, the warmest July in Lombard was 2012 — when the month averaged 27.6°C — while the coldest was 2009 at 20°C. Typical July days reach 28.6°C with nights near 17.5°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in Lombard, averaging 104 mm of rainfall. The wettest July on record was 2017 with 183 mm, while the driest was 1991 at 35 mm.
Relative humidity in Lombard during July averages 72%. The most humid July was 1993 at 83%, and the least humid was 1988 at 55%.
July receives about 6.1 kWh/m²/day of solar energy in Lombard. The sunniest July was 2019 at 6.7 kWh/m²/day, and the cloudiest was 1992 at 4.6.
Average wind speed in Lombard during July is 2.5 m/s. The windiest July was 1990 at 2.9 m/s, while the calmest were 2023 and 2024 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.2°C | 22.4°C | 23.0°C | 23.4°C | 23.6°C | +0.4°C |
| Avg High | 28.9°C | 27.9°C | 28.8°C | 28.7°C | 29.0°C | +0.1°C |
| Avg Low | 17.4°C | 16.8°C | 17.1°C | 18.2°C | 18.3°C | +0.9°C |
| Avg Rain | 109 mm | 96 mm | 93 mm | 111 mm | 121 mm | +11 mm |
July temperatures in Lombard have risen by about 1°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 9.2°C (1984) to a record high of 40.5°C (2005).
Rainfall in July is a relatively wet time of year, averaging 104 mm, with a wettest year of 183 mm.
One of the best times to visit Lombard
July is one of the best times to visit Lombard. Expect days averaging 28.6°C and nights around 17.5°C (mean 23.1°C) — warmer than Lombard's yearly average — with higher rainfall (104 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 | 30.0°C | 24.8°C | 19.6°C | 34.6°C | 15.2°C | 135 mm | 73% | 2.2 m/s | 5.7 |
| 2024 | 28.2°C | 22.9°C | 17.7°C | 31.5°C | 11.1°C | 135 mm | 73% | 2 m/s | 6 |
| 2023 | 28.9°C | 23.3°C | 17.7°C | 34.7°C | 14.1°C | 173 mm | 69% | 2 m/s | 6.3 |
| 2022 | 28.6°C | 23.1°C | 17.5°C | 32.9°C | 14.2°C | 146 mm | 73% | 2.5 m/s | 5.9 |
| 2021 | 28.7°C | 23.2°C | 17.8°C | 34.5°C | 13.2°C | 49 mm | 72% | 2.6 m/s | 5.4 |
| 2020 | 29.4°C | 24.3°C | 19.2°C | 32.8°C | 15.7°C | 86 mm | 76% | 2.3 m/s | 6.5 |
| 2019 | 28.7°C | 23.8°C | 18.9°C | 32.5°C | 13.7°C | 102 mm | 79% | 2.4 m/s | 6.7 |
| 2018 | 28.1°C | 22.8°C | 17.4°C | 32.0°C | 13.4°C | 56 mm | 75% | 2.3 m/s | 6.5 |
| 2017 🌧️ | 27.4°C | 22.5°C | 17.5°C | 31.4°C | 11.7°C | 183 mm | 79% | 2.2 m/s | 6.3 |
| 2016 | 28.7°C | 23.9°C | 19.1°C | 32.1°C | 13.9°C | 143 mm | 76% | 2.3 m/s | 6 |
| 2015 | 27.4°C | 22.0°C | 16.6°C | 31.8°C | 10.0°C | 98 mm | 76% | 2.3 m/s | 5.8 |
| 2014 | 25.4°C | 20.1°C | 14.7°C | 29.4°C | 10.0°C | 70 mm | 75% | 2.5 m/s | 6.4 |
| 2013 | 27.1°C | 22.0°C | 17.0°C | 32.9°C | 10.4°C | 59 mm | 77% | 2.4 m/s | 6.1 |
| 2012 🔥 | 34.2°C | 27.6°C | 21.0°C | 40.4°C | 16.8°C | 74 mm | 57% | 2.4 m/s | 6.5 |
| 2011 | 30.3°C | 25.4°C | 20.5°C | 35.1°C | 15.3°C | 140 mm | 76% | 2.1 m/s | 6.3 |
| 2010 | 29.2°C | 24.3°C | 19.3°C | 32.3°C | 12.6°C | 181 mm | 78% | 2.5 m/s | 6.3 |
| 2009 ❄️ | 25.5°C | 20.0°C | 14.6°C | 28.9°C | 11.6°C | 63 mm | 75% | 2.4 m/s | 5.4 |
| 2008 | 27.7°C | 22.4°C | 17.0°C | 31.3°C | 10.5°C | 126 mm | 77% | 2.6 m/s | 6.5 |
| 2007 | 28.4°C | 22.5°C | 16.5°C | 34.0°C | 12.1°C | 116 mm | 69% | 2.5 m/s | 6.6 |
| 2006 | 30.5°C | 24.6°C | 18.8°C | 37.7°C | 14.0°C | 87 mm | 70% | 2.6 m/s | 5.9 |
| 2005 | 31.7°C | 25.1°C | 18.5°C | 40.5°C | 13.3°C | 64 mm | 61% | 2.6 m/s | 6.1 |
| 2004 | 27.2°C | 21.9°C | 16.5°C | 30.8°C | 11.8°C | 70 mm | 75% | 2.6 m/s | 5.7 |
| 2003 | 29.1°C | 22.7°C | 16.3°C | 34.7°C | 11.8°C | 157 mm | 67% | 2.6 m/s | 6.2 |
| 2002 | 31.0°C | 25.2°C | 19.3°C | 36.6°C | 13.7°C | 46 mm | 66% | 2.5 m/s | 6.4 |
| 2001 | 30.5°C | 24.1°C | 17.8°C | 35.6°C | 9.3°C | 72 mm | 64% | 2.2 m/s | 6.3 |
| 2000 | 26.6°C | 21.4°C | 16.1°C | 29.9°C | 11.4°C | 124 mm | 75% | 2.6 m/s | 5.7 |
| 1999 | 30.6°C | 25.0°C | 19.5°C | 37.3°C | 13.7°C | 71 mm | 72% | 2.8 m/s | 6.5 |
| 1998 | 28.4°C | 22.8°C | 17.1°C | 32.5°C | 13.8°C | 69 mm | 72% | 2.2 m/s | 6.5 |
| 1997 | 28.9°C | 22.8°C | 16.7°C | 36.3°C | 10.9°C | 58 mm | 70% | 2.7 m/s | 6.2 |
| 1996 | 25.7°C | 20.1°C | 14.6°C | 30.1°C | 10.1°C | 178 mm | 74% | 2.4 m/s | 6 |
| 1995 | 28.6°C | 23.4°C | 18.1°C | 32.6°C | 11.3°C | 102 mm | 75% | 2.6 m/s | 6.5 |
| 1994 | 27.0°C | 21.7°C | 16.4°C | 30.2°C | 11.0°C | 81 mm | 77% | 2.7 m/s | 5.6 |
| 1993 | 26.7°C | 22.2°C | 17.7°C | 30.3°C | 13.9°C | 114 mm | 83% | 2.8 m/s | 5.3 |
| 1992 | 26.0°C | 20.5°C | 15.0°C | 33.6°C | 12.5°C | 143 mm | 76% | 2.7 m/s | 4.6 |
| 1991 | 30.2°C | 23.9°C | 17.7°C | 36.8°C | 12.7°C | 35 mm | 63% | 2.7 m/s | 6.5 |
| 1990 | 26.5°C | 21.1°C | 15.7°C | 32.8°C | 11.4°C | 105 mm | 77% | 2.9 m/s | 5.8 |
| 1989 | 29.3°C | 23.3°C | 17.4°C | 37.2°C | 13.8°C | 148 mm | 70% | 2.4 m/s | 5.9 |
| 1988 | 32.5°C | 25.2°C | 18.0°C | 39.2°C | 11.0°C | 67 mm | 55% | 2.2 m/s | 6.3 |
| 1987 | 30.2°C | 24.6°C | 19.1°C | 35.1°C | 11.9°C | 108 mm | 72% | 2.4 m/s | 5.9 |
| 1986 | 28.2°C | 22.9°C | 17.5°C | 31.8°C | 11.1°C | 114 mm | 79% | 2.6 m/s | 6 |
| 1985 | 28.6°C | 22.4°C | 16.2°C | 35.1°C | 11.7°C | 103 mm | 67% | 2.8 m/s | 5.9 |
| 1984 | 27.4°C | 21.5°C | 15.6°C | 32.5°C | 9.2°C | 60 mm | 69% | 2.5 m/s | 6.1 |
| 1983 | 28.9°C | 24.0°C | 19.1°C | 33.3°C | 9.7°C | 103 mm | 77% | 2.4 m/s | — |
| 1982 | 27.5°C | 22.2°C | 17.0°C | 30.3°C | 10.4°C | 183 mm | 79% | 2.6 m/s | — |
| 1981 | 27.7°C | 22.3°C | 16.9°C | 33.5°C | 10.0°C | 97 mm | 74% | 2.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 28.6°C with lows near 17.5°C (mean 23.1°C), based on 45 years of NASA POWER data.
July averages 104 mm of rainfall in Lombard, a relatively wet time of year. The wettest on record was 183 mm in 2017.
The hottest July reached 40.5°C in 2005. The coldest dipped to 9.2°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1°C. Daytime highs moved from 28°C to 28.9°C and overnight lows from 17°C to 18.1°C over the same span.
July is one of the warmer months of the year in Lombard and a relatively wet time of year, so plan for around 28.6°C daytime highs and 17.5°C at night.
Not quite — July is the 12th coolest month in Lombard, averaging 23.1°C.
For July in Lombard, pack light layers you can adjust through the day, with typical highs of 28.6°C and lows of 17.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 72% — moderately humid.
Average wind speed in July is 2.5 m/s. The windiest July on record averaged 2.9 m/s (1990).
The wettest July on record was 2017 with 183 mm. On average, July sees 104 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 Lombard 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.
