Decatur (IL)
July
Weather in Decatur, Illinois for July 2027
Your guide to Decatur weather in July - trends and predictions
In general, the average temperature in Decatur at the beginning of July is 28.9 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.4 °C by the end of July.
The climate of Decatur in July is notably wet, with an average of 13 rainy days, and a total of 220.6 mm of precipitation.
Is July a good time to visit Decatur? check out the best time to travel to Decatur page.
✨ Is July a good time to visit Decatur? – Ask the AI Weatherman
Temperatures
Rain 🌧️
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18
Dry days
13
Rainy days
0
Snow days
29°/19°
Temperatures
15 km/h
Avg max wind
79 %
Avg humidity
Decatur Weather July
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Temperatures trend during July in Decatur
See the weather trend as well as the moving average line
July weather in Decatur day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Patchy rain possible | 27° /16° | 1.3 mm | 8 | |
| Jul. 2 | Patchy rain possible | 30° /19° | 1 mm | 9 | |
| Jul. 3 |  Light rain | 31° /21° | 4 mm | 9 | |
| Jul. 4 | Light rain | 30° /21° | 8.5 mm | 8 | |
| Jul. 5 | Light rain shower | 29° /20° | 1.2 mm | 7 | |
| Jul. 6 | Light rain | 27° /19° | 9.7 mm | 7 | |
| Jul. 7 | Light rain | 29° /19° | 8.8 mm | 8 | |
| Jul. 8 | Light rain | 30° /18° | 4.2 mm | 8 | |
| Jul. 9 |  Heavy rain | 26° /20° | 85.4 mm | 8 | |
| Jul. 10 | Light rain | 29° /18° | 4.7 mm | 8 | |
| Jul. 11 | Light rain | 29° /20° | 8.2 mm | 7 | |
| Jul. 12 | Patchy rain possible | 29° /20° | 0.1 mm | 8 | |
| Jul. 13 |  Moderate or heavy rain with thunder | 28° /19° | 13.1 mm | 8 | |
| Jul. 14 |  Thundery outbreaks possible | 30° /20° | 0 mm | 8 | |
| Jul. 15 | Patchy rain possible | 30° /21° | 1.3 mm | 8 | |
| Jul. 16 |  Patchy light rain with thunder | 30° /22° | 1.4 mm | 8 | |
| Jul. 17 | Light rain | 27° /20° | 3.5 mm | 8 | |
| Jul. 18 | Light rain | 27° /18° | 5 mm | 8 | |
| Jul. 19 | Patchy rain possible | 29° /18° | 0 mm | 8 | |
| Jul. 20 | Patchy rain possible | 28° /18° | 2.1 mm | 8 | |
| Jul. 21 |  Moderate rain | 29° /21° | 19.6 mm | 8 | |
| Jul. 22 | Patchy rain possible | 27° /17° | 0.2 mm | 9 | |
| Jul. 23 | Light rain shower | 27° /16° | 1.1 mm | 8 | |
| Jul. 24 | Light rain | 29° /18° | 3.4 mm | 8 | |
| Jul. 25 | Light rain | 27° /20° | 2.8 mm | 8 | |
| Jul. 26 | Light rain | 29° /19° | 3.8 mm | 7 | |
| Jul. 27 | Moderate rain | 31° /21° | 16.8 mm | 8 | |
| Jul. 28 | Light rain | 29° /22° | 2.7 mm | 8 | |
| Jul. 29 | Light rain shower | 31° /20° | 1.8 mm | 8 | |
| Jul. 30 |  Sunny | 31° /20° | 0.3 mm | 9 | |
| Jul. 31 | Patchy light rain with thunder | 28° /19° | 4.6 mm | 8 | |
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Important Notice
Our weather forecast for Decatur in July is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Decatur forecast closer to your planned date for the most up-to-date weather information.
Change Month
Decatur in July - FAQ
What are the expected maximum and minimum temperatures in Decatur during July?
During July, expect a variety of temperatures with highs around 29° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in Decatur during July?
Significant rainfall exceeding 220.6 mm is expected in Decatur during July, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Decatur during July?
The average wind speed in Decatur during July is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Decatur
Explore the daily rainfall trends and prepare for Decaturs July weather 💧
Typically, Decatur has 13 rainy days in July with a total of 220.6 mm of rainfall.
UV exposure in Decatur during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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