Decatur, IL 10-Day Weather Forecast
10-Day Temperature Forecast
Daily Precipitation Outlook
10-day outlook for Decatur, IL: today rain, partially cloudy, high 78°F, low 67°F with a 67% rain chance. Tomorrow: high 77°F.
| Today's High | 78°F |
| Today's Low | 67°F |
| Rain Chance | 67% |
| Conditions | Rain, Partially cloudy |
| Tomorrow's High | 77°F |
| Tomorrow's Low | 62°F |
10-Day Temperature Outlook for Decatur, IL
The full 10-day forecast table below shows daily high and low temperatures, precipitation probability, and weather conditions for each day in Decatur, IL. Today reaches a high of 78°F with rain, partially cloudy and a 67% rain chance. Tomorrow's high is 77°F with a 66% chance of rain.
How to Use the 10-Day Forecast
Long-range forecasts become less precise beyond 5–7 days but remain useful for planning outdoor events and travel in Decatur, IL. The daily rain probability is expressed as a percentage — days above 50% have a more-likely-than-not chance of measurable precipitation. Days below 20% are typically dry.
For a closer look at today's weather hour by hour, see the Decatur hourly forecast. For tomorrow's specific rain timing, the rain tomorrow page shows the hourly precipitation breakdown.
10-Day Forecast for Decatur, IL
| Day | High | Low | Rain | Conditions |
|---|---|---|---|---|
| Wed, Apr 15 | 78°F | 67°F | 67% | Rain, Partially cloudy |
| Thu, Apr 16 | 77°F | 62°F | 66% | Rain, Partially cloudy |
| Fri, Apr 17 | 83°F | 56°F | 63% | Rain, Partially cloudy |
| Sat, Apr 18 | 70°F | 47°F | 83% | Rain, Partially cloudy |
| Sun, Apr 19 | 54°F | 39°F | 35% | Clear |
| Mon, Apr 20 | 63°F | 38°F | 5% | Clear |
| Tue, Apr 21 | 72°F | 50°F | 12% | Partially cloudy |
| Wed, Apr 22 | 75°F | 54°F | 18% | Partially cloudy |
| Thu, Apr 23 | 76°F | 55°F | 52% | Rain, Partially cloudy |
| Fri, Apr 24 | 67°F | 40°F | 74% | Rain, Overcast |
Ad-free · No tracking · No ads · Live weather data · AskWeather.ai