July is one of the warmer months of the year in Normal, with average highs near 28.6°C and lows around 18.2°C (mean 23.4°C). It is a relatively wet time of year, averaging 105 mm of rainfall and 76% relative humidity across the period.
July is one of the warmer months of the year in Normal. Across 45 years of records, the warmest July in Normal was 2012 — when the month averaged 29.2°C — while the coldest was 2009 at 20.2°C. Typical July days reach 28.6°C with nights near 18.2°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in Normal, averaging 105 mm of rainfall. The wettest July on record was 1992 with 288 mm, while the driest was 2012 at 25 mm.
Relative humidity in Normal during July averages 76%. The most humid July was 1993 at 87%, and the least humid was 2012 at 49%.
July receives about 6.2 kWh/m²/day of solar energy in Normal. The sunniest Julys were 1999, 2007 and 2019 at 6.7 kWh/m²/day, and the cloudiest was 1992 at 4.7.
Average wind speed in Normal during July is 2.2 m/s. The windiest July was 1990 at 2.6 m/s, while the calmest were 1998, 2011 and 2023 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.6°C | 22.7°C | 23.2°C | 23.8°C | 23.9°C | +0.3°C |
| Avg High | 28.9°C | 27.9°C | 28.8°C | 28.8°C | 29.1°C | +0.2°C |
| Avg Low | 18.3°C | 17.6°C | 17.8°C | 18.7°C | 18.8°C | +0.5°C |
| Avg Rain | 98 mm | 110 mm | 108 mm | 89 mm | 127 mm | +29 mm |
July temperatures in Normal have risen by about 1.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8.4°C (1983) to a record high of 41.6°C (2012).
Rainfall in July is a relatively wet time of year, averaging 105 mm, with a wettest year of 288 mm.
One of the best times to visit Normal
July is one of the best times to visit Normal. Expect days averaging 28.6°C and nights around 18.2°C (mean 23.4°C) — warmer than Normal's yearly average — with higher rainfall (105 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 | 30.1°C | 25.3°C | 20.6°C | 33.0°C | 16.0°C | 137 mm | 78% | 2 m/s | 5.8 |
| 2024 | 28.4°C | 23.2°C | 18.0°C | 32.0°C | 10.5°C | 158 mm | 75% | 2 m/s | 6.1 |
| 2023 | 30.1°C | 24.3°C | 18.5°C | 37.2°C | 14.0°C | 133 mm | 69% | 1.9 m/s | 6.5 |
| 2022 | 29.6°C | 24.0°C | 18.4°C | 34.0°C | 14.2°C | 115 mm | 74% | 2.3 m/s | 5.9 |
| 2021 | 27.5°C | 22.6°C | 17.8°C | 30.9°C | 12.1°C | 90 mm | 81% | 2.1 m/s | 5.5 |
| 2020 | 28.8°C | 24.0°C | 19.2°C | 31.8°C | 15.7°C | 130 mm | 80% | 2 m/s | 6.5 |
| 2019 | 28.7°C | 24.0°C | 19.4°C | 31.8°C | 13.1°C | 74 mm | 83% | 2.1 m/s | 6.7 |
| 2018 | 28.1°C | 22.9°C | 17.7°C | 31.5°C | 12.7°C | 87 mm | 78% | 2.3 m/s | 6.4 |
| 2017 | 28.7°C | 23.5°C | 18.3°C | 32.2°C | 12.9°C | 101 mm | 78% | 2.1 m/s | 6.5 |
| 2016 | 27.6°C | 23.4°C | 19.2°C | 30.0°C | 11.8°C | 180 mm | 84% | 2 m/s | 6 |
| 2015 | 27.1°C | 22.4°C | 17.7°C | 31.9°C | 11.4°C | 134 mm | 83% | 2.1 m/s | 5.7 |
| 2014 | 25.7°C | 20.5°C | 15.3°C | 29.7°C | 11.0°C | 70 mm | 76% | 2.4 m/s | 6.5 |
| 2013 | 26.5°C | 21.7°C | 16.9°C | 31.5°C | 9.6°C | 56 mm | 81% | 2.2 m/s | 6 |
| 2012 🔥 | 36.4°C | 29.2°C | 21.9°C | 41.6°C | 17.3°C | 25 mm | 49% | 2.3 m/s | 6.5 |
| 2011 | 30.2°C | 25.7°C | 21.1°C | 33.9°C | 15.4°C | 72 mm | 81% | 1.9 m/s | 6.5 |
| 2010 | 28.9°C | 24.3°C | 19.7°C | 31.2°C | 12.1°C | 94 mm | 82% | 2.2 m/s | 6.3 |
| 2009 ❄️ | 25.0°C | 20.2°C | 15.5°C | 27.9°C | 11.1°C | 115 mm | 81% | 2.2 m/s | 5.8 |
| 2008 | 27.4°C | 22.4°C | 17.4°C | 30.0°C | 12.1°C | 158 mm | 83% | 2.3 m/s | 6.5 |
| 2007 | 27.4°C | 21.8°C | 16.3°C | 30.9°C | 11.3°C | 92 mm | 75% | 2.2 m/s | 6.7 |
| 2006 | 31.2°C | 25.4°C | 19.5°C | 36.4°C | 12.3°C | 115 mm | 70% | 2.4 m/s | 6.2 |
| 2005 | 32.4°C | 25.6°C | 18.8°C | 40.1°C | 13.4°C | 78 mm | 61% | 2.3 m/s | 6.4 |
| 2004 | 27.5°C | 22.5°C | 17.6°C | 31.5°C | 12.4°C | 93 mm | 78% | 2.3 m/s | 5.8 |
| 2003 | 29.0°C | 23.3°C | 17.7°C | 36.0°C | 12.6°C | 165 mm | 72% | 2.5 m/s | 6.5 |
| 2002 | 29.4°C | 24.4°C | 19.3°C | 33.0°C | 13.1°C | 90 mm | 76% | 2.1 m/s | 6.5 |
| 2001 | 30.0°C | 24.2°C | 18.4°C | 35.0°C | 9.2°C | 88 mm | 70% | 2 m/s | 6.3 |
| 2000 | 28.3°C | 22.6°C | 17.0°C | 31.3°C | 11.1°C | 87 mm | 74% | 2.3 m/s | 6 |
| 1999 | 29.9°C | 24.7°C | 19.6°C | 36.3°C | 10.4°C | 77 mm | 76% | 2.4 m/s | 6.7 |
| 1998 | 27.6°C | 22.8°C | 18.0°C | 31.9°C | 12.4°C | 78 mm | 80% | 1.9 m/s | 6.3 |
| 1997 | 30.6°C | 24.1°C | 17.7°C | 37.7°C | 10.7°C | 48 mm | 67% | 2.5 m/s | 6.4 |
| 1996 | 26.5°C | 20.8°C | 15.2°C | 32.7°C | 10.2°C | 115 mm | 75% | 2.4 m/s | 6.1 |
| 1995 | 27.7°C | 23.1°C | 18.5°C | 31.6°C | 10.9°C | 68 mm | 81% | 2.1 m/s | 6.6 |
| 1994 | 27.1°C | 22.1°C | 17.2°C | 30.3°C | 12.0°C | 71 mm | 80% | 2.3 m/s | 5.9 |
| 1993 | 27.4°C | 23.4°C | 19.3°C | 30.7°C | 15.2°C | 183 mm | 87% | 2.5 m/s | 5.2 |
| 1992 🌧️ | 26.2°C | 21.4°C | 16.6°C | 30.5°C | 12.4°C | 288 mm | 83% | 2.5 m/s | 4.7 |
| 1991 | 29.5°C | 23.7°C | 17.9°C | 35.5°C | 12.8°C | 44 mm | 69% | 2.3 m/s | 6.6 |
| 1990 | 26.2°C | 21.3°C | 16.4°C | 31.7°C | 12.3°C | 132 mm | 82% | 2.6 m/s | 5.8 |
| 1989 | 30.2°C | 24.4°C | 18.5°C | 36.2°C | 15.0°C | 81 mm | 70% | 2.4 m/s | 5.8 |
| 1988 | 34.3°C | 26.9°C | 19.6°C | 40.6°C | 10.8°C | 30 mm | 50% | 2.1 m/s | 6.2 |
| 1987 | 31.0°C | 25.5°C | 20.0°C | 35.6°C | 12.0°C | 83 mm | 72% | 2.4 m/s | 5.9 |
| 1986 | 28.3°C | 23.7°C | 19.1°C | 31.5°C | 13.7°C | 133 mm | 82% | 2.3 m/s | 6.3 |
| 1985 | 27.1°C | 21.8°C | 16.4°C | 31.2°C | 10.2°C | 99 mm | 75% | 2.3 m/s | 5.8 |
| 1984 | 26.2°C | 20.9°C | 15.5°C | 31.2°C | 9.9°C | 90 mm | 78% | 2.2 m/s | 6.2 |
| 1983 | 28.8°C | 24.1°C | 19.3°C | 34.4°C | 8.4°C | 34 mm | 79% | 2.3 m/s | — |
| 1982 | 27.4°C | 22.8°C | 18.2°C | 30.8°C | 13.9°C | 150 mm | 83% | 2.4 m/s | — |
| 1981 | 27.1°C | 22.5°C | 17.8°C | 31.9°C | 11.3°C | 188 mm | 83% | 2.2 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 18.2°C (mean 23.4°C), based on 45 years of NASA POWER data.
July averages 105 mm of rainfall in Normal, a relatively wet time of year. The wettest on record was 288 mm in 1992.
The hottest July reached 41.6°C in 2012. The coldest dipped to 8.4°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.5°C. Daytime highs moved from 27.3°C to 29.1°C and overnight lows from 17.4°C to 18.7°C over the same span.
July is one of the warmer months of the year in Normal and a relatively wet time of year, so plan for around 28.6°C daytime highs and 18.2°C at night.
Not quite — July is the 12th coolest month in Normal, averaging 23.4°C.
For July in Normal, pack light layers you can adjust through the day, with typical highs of 28.6°C and lows of 18.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 76% — quite humid.
Average wind speed in July is 2.2 m/s. The windiest July on record averaged 2.6 m/s (1990).
The wettest July on record was 1992 with 288 mm. On average, July sees 105 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 Normal 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.
