Weather Tomorrow in Decatur, IL
Saturday, September 12, 2026
Clear
Precip chance
3%
Wind
1-7 mph
Humidity
78%
Feels like
88–68°F
Data source: National Weather Service (NOAA) · Updated just now
Tomorrow by Hour
66°Temperature trend90°
| Time | Temp | Condition | Rain % | Wind | ||
|---|---|---|---|---|---|---|
| 5 AM☽ | 69°F | Mostly Clear | 0% | 2 mph SE | ||
| 6 AM☽ | 68°F | Mostly Clear | 0% | 2 mph SE | ||
| 7 AM☽ | 68°F | Partly Cloudy | 0% | 2 mph SSE | ||
| 8 AM☽ | 68°F | Partly Cloudy | 2% | 2 mph SSE | ||
| 9 AM☽ | 67°F | Partly Cloudy | 3% | 2 mph SSE | ||
| 10 AM☽ | 67°F | Partly Cloudy | 1% | 2 mph S | ||
| 11 AM | 67°F | Partly Sunny | 0% | 2 mph S | ||
| 12 PM | 66°F | Partly Sunny | 0% | 2 mph S | ||
| 1 PM | 70°F | Partly Sunny | 0% | 3 mph SSW | ||
| 2 PM | 73°F | Mostly Sunny | 0% | 5 mph SW | ||
| 3 PM | 79°F | Mostly Sunny | 0% | 5 mph WSW | ||
| 4 PM | 82°F | Mostly Sunny | 0% | 6 mph WSW | ||
| 5 PM | 84°F | Sunny | 0% | 6 mph WSW | ||
| 6 PM | 87°F | Sunny | 0% | 7 mph WSW | ||
| 7 PM | 88°F | Sunny | 0% | 7 mph W | ||
| 8 PM | 88°F | Sunny | 0% | 7 mph W | ||
| 9 PM | 90°F | Mostly Sunny | 0% | 7 mph W | ||
| 10 PM | 88°F | Sunny | 0% | 7 mph W | ||
| 11 PM☽ | 87°F | Mostly Clear | 0% | 6 mph WNW | ||
| 12 AM☽ | 84°F | Mostly Clear | 3% | 5 mph WNW | ||
| 1 AM☽ | 78°F | Mostly Clear | 3% | 3 mph NW | ||
| 2 AM☽ | 75°F | Mostly Clear | 3% | 2 mph WSW | ||
| 3 AM☽ | 73°F | Partly Cloudy | 3% | 1 mph S | ||
| 4 AM☽ | 71°F | Partly Cloudy | 3% | 1 mph S | ||
Precipitation Timeline
No significant precipitation expected tomorrow.
What to Wear Tomorrow
Hot — wear breathable, light clothing
Clothing
- • Light t-shirt or tank top
- • Shorts or light skirt
- • Hat for sun protection
Footwear
Sandals or breathable sneakers
Accessories
- • Sunglasses
- • Sunscreen
Conditions
High: 90°F
Low: 66°F
Wind: 1-7 mph
Rain: 3%
Enjoy your day!
Best Time to Be Outside Tomorrow
1 PM – 2 PM
Excellent conditions for outdoor activities (dry, comfortable temp, light wind, daylight)
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More for Decatur, IL
- Will it rain tomorrow in Decatur?
- What time will it rain tomorrow in Decatur?
- Weather tomorrow by hour in Decatur
- Heat index tomorrow by zip code near Decatur
- Dew point tomorrow by zip code near Decatur
- Wind chill tomorrow by zip code near Decatur
- Snow forecast tomorrow by zip code near Decatur
- What to wear tomorrow in Decatur
- Best time to be outside tomorrow in Decatur
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Frequently Asked Questions
What is the weather forecast for tomorrow in Decatur, IL?
Tomorrow in Decatur: High of 90°F, Low of 66°F. Clear with 3% chance of precipitation. Wind 1-7 mph.
Will it rain tomorrow in Decatur?
No significant precipitation expected tomorrow.
What should I wear tomorrow in Decatur?
With a high of 90°F and low of 66°F, check our "What to Wear" section above for specific clothing recommendations based on temperature, wind, and precipitation.
How accurate is this forecast?
Our forecasts come directly from the National Weather Service (NOAA), which provides some of the most accurate weather predictions available. Tomorrow forecasts are generally 80-90% accurate, with accuracy decreasing the further out you look. Data is refreshed every 30 minutes.