Current Conditions
Decatur, Illinois
Wind
S 8 mph12 km/h
Humidity
52%
Cloud Cover
23%
As of Tuesday, September 8, 2026 at 9:26 PM CDT
Today's Outlook
Night
Mostly cloudy, with a low around 76°F24°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 30% chance of drizzle in the evening.
7-Day Forecast
| Day | Condition | High (°F) | Low (°F) | Precip (mm) | Cloud Cover (%) | Wind (mph) | |
|---|---|---|---|---|---|---|---|
| Drizzle | High 88°F31°CFeels 92°F33°C | Low 75°F24°C | Precip 0.03 in0.8 mm30% | Cloud 48% | Wind SW 6 mph10 km/h | Wednesday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 75°F24°C. Breezy from the WSW at 6 to 8 mph10 to 12 km/h. 15% chance of drizzle in the afternoon. Humid. Wednesday Night: Mostly cloudy, with a low around 76°F24°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 30% chance of drizzle in the evening. | |
| Rain | High 76°F25°C | Low 69°F21°C | Precip 0.89 in22.5 mm93% | Cloud 95% | Wind WNW 4 mph6 km/h | Thursday: Overcast and warm, with a high of 76°F25°C and morning low of 71°F22°C. Light wind from the W around 4 mph7 km/h. 93% chance of rain throughout the day. Heavy, humid air. Thursday Night: Overcast, with a low around 69°F21°C. Light wind from the N around 4 mph6 km/h. 90% chance of rain throughout the night. | |
| Drizzle | High 82°F28°C | Low 65°F18°C | Precip 0.04 in0.9 mm22% | Cloud 57% | Wind ESE 5 mph8 km/h | Friday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 65°F18°C. Light wind from the ESE around 5 mph9 km/h. 22% chance of drizzle throughout the day. Humid. Friday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the E around 5 mph8 km/h. | |
| Drizzle | High 87°F30°CFeels 90°F32°C | Low 67°F20°C | Precip 0.04 in0.9 mm10% | Cloud 45% | Wind SW 5 mph9 km/h | Saturday: Mostly cloudy and hot, with a high of 87°F30°C and morning low of 67°F20°C. Light wind from the SW around 6 mph10 km/h. 10% chance of drizzle around midday. Humid. Saturday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the SSW around 5 mph8 km/h. | |
| Clear | High 83°F29°C | Low 66°F19°C | Precip 0.02 in0.6 mm6% | Cloud 32% | Wind N 6 mph10 km/h | Sunday: Partly cloudy and warm, with a high of 83°F29°C and morning low of 66°F19°C. Light wind from the N around 6 mph10 km/h. Sunday Night: Mostly clear, with a low around 69°F20°C. Light wind from the NNE around 6 mph9 km/h. | |
| Drizzle | High 88°F31°C | Low 65°F19°C | Precip 0.03 in0.8 mm10% | Cloud 33% | Wind SE 10 mph16 km/h | Monday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 65°F19°C. Breezy from the SSE at 10 to 12 mph16 to 19 km/h. 10% chance of drizzle in the morning. Monday Night: Partly cloudy, with a low around 67°F19°C. Breezy from the SE at 9 to 12 mph15 to 20 km/h. | |
| Drizzle | High 88°F31°C | Low 72°F22°C | Precip 0.06 in1.5 mm19% | Cloud 45% | Wind SW 9 mph15 km/h | Tuesday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 13% chance of drizzle throughout the day. Humid. Tuesday Night: Partly cloudy, with a low around 74°F24°C. Breezy from the SSW at 9 to 12 mph14 to 19 km/h. 19% chance of drizzle throughout the night. |
15-Day Forecast
| Day | High | Low | Precip | Cloud Cover | Condition | Wind | |
|---|---|---|---|---|---|---|---|
| WednesdaySep 9 | 88°F31°C Feels 92°F33°C | 75°F24°C | 0.03 in0.8 mm· 30% | 48% | Drizzle | SW 6 mph10 km/h | |
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 75°F24°C. Breezy from the WSW at 6 to 8 mph10 to 12 km/h. 15% chance of drizzle in the afternoon. Humid. NightMostly cloudy, with a low around 76°F24°C. Breezy from the SSW at 6 to 9 mph10 to 14 km/h. 30% chance of drizzle in the evening. | |||||||
| ThursdaySep 10 | 76°F25°C | 69°F21°C | 0.89 in22.5 mm· 93% | 95% | Rain | WNW 4 mph6 km/h | |
DayOvercast and warm, with a high of 76°F25°C and morning low of 71°F22°C. Light wind from the W around 4 mph7 km/h. 93% chance of rain throughout the day. Heavy, humid air. NightOvercast, with a low around 69°F21°C. Light wind from the N around 4 mph6 km/h. 90% chance of rain throughout the night. | |||||||
| FridaySep 11 | 82°F28°C | 65°F18°C | 0.04 in0.9 mm· 22% | 57% | Drizzle | ESE 5 mph8 km/h | |
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 65°F18°C. Light wind from the ESE around 5 mph9 km/h. 22% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 66°F19°C. Light wind from the E around 5 mph8 km/h. | |||||||
| SaturdaySep 12 | 87°F30°C Feels 90°F32°C | 67°F20°C | 0.04 in0.9 mm· 10% | 45% | Drizzle | SW 5 mph9 km/h | |
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 67°F20°C. Light wind from the SW around 6 mph10 km/h. 10% chance of drizzle around midday. Humid. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SSW around 5 mph8 km/h. | |||||||
| SundaySep 13 | 83°F29°C | 66°F19°C | 0.02 in0.6 mm· 6% | 32% | Clear | N 6 mph10 km/h | |
DayPartly cloudy and warm, with a high of 83°F29°C and morning low of 66°F19°C. Light wind from the N around 6 mph10 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the NNE around 6 mph9 km/h. | |||||||
| MondaySep 14 | 88°F31°C | 65°F19°C | 0.03 in0.8 mm· 10% | 33% | Drizzle | SE 10 mph16 km/h | |
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 65°F19°C. Breezy from the SSE at 10 to 12 mph16 to 19 km/h. 10% chance of drizzle in the morning. NightPartly cloudy, with a low around 67°F19°C. Breezy from the SE at 9 to 12 mph15 to 20 km/h. | |||||||
| TuesdaySep 15 | 88°F31°C | 72°F22°C | 0.06 in1.5 mm· 19% | 45% | Drizzle | SW 9 mph15 km/h | |
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 72°F22°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 13% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 74°F24°C. Breezy from the SSW at 9 to 12 mph14 to 19 km/h. 19% chance of drizzle throughout the night. | |||||||
| WednesdaySep 16 | 85°F29°C | 68°F20°C | 0.19 in4.9 mm· 37% | 58% | Showers | E 7 mph11 km/h | |
DayMostly cloudy and warm, with a high of 85°F29°C and morning low of 68°F20°C. Breezy from the ESE at 7 mph11 km/h. 37% chance of showers throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the E at 7 to 8 mph11 to 13 km/h. 30% chance of showers throughout the night. | |||||||
| ThursdaySep 17 | 84°F29°C | 70°F21°C | 0.15 in3.9 mm· 20% | 49% | Showers | SSW 9 mph14 km/h | |
DayMostly cloudy and warm, with a high of 84°F29°C and morning low of 70°F21°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. 20% chance of showers throughout the day. Humid. NightPartly cloudy, with a low around 71°F22°C. Breezy from the SSE at 8 mph13 km/h. 19% chance of drizzle throughout the night. | |||||||
| FridaySep 18 | 78°F26°C | 65°F18°C | 0.13 in3.4 mm· 15% | 51% | Showers | WNW 8 mph14 km/h | |
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 65°F18°C. Breezy from the W at 9 mph14 km/h. 15% chance of drizzle throughout the day. NightMostly cloudy, with a low around 66°F19°C. Breezy from the NW at 8 to 9 mph13 to 14 km/h. 15% chance of showers throughout the night. | |||||||
| SaturdaySep 19 | 75°F24°C | 59°F15°C | 0.16 in4.1 mm· 17% | 51% | Showers | NNW 8 mph12 km/h | |
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 59°F15°C. Breezy from the NNW at 8 to 9 mph13 to 14 km/h. 16% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the N at 7 to 8 mph12 to 12 km/h. 17% chance of showers throughout the night. | |||||||
| SundaySep 20 | 73°F23°C | 56°F13°C | 0.12 in3.1 mm· 18% | 49% | Showers | N 8 mph12 km/h | |
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 56°F13°C. Breezy from the N at 8 to 9 mph13 to 15 km/h. 18% chance of drizzle throughout the day. NightPartly cloudy, with a low around 58°F14°C. Breezy from the NNE at 7 to 8 mph12 to 12 km/h. 13% chance of showers throughout the night. | |||||||
| MondaySep 21 | 72°F22°C | 53°F12°C | 0.11 in2.8 mm· 13% | 52% | Showers | ENE 8 mph12 km/h | |
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 53°F12°C. Breezy from the ENE at 8 to 9 mph13 to 14 km/h. 13% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Breezy from the ENE at 7 to 8 mph12 to 12 km/h. 13% chance of drizzle throughout the night. | |||||||
| TuesdaySep 22 | 72°F22°C | 54°F12°C | 0.09 in2.4 mm· 13% | 56% | Drizzle | ESE 8 mph13 km/h | |
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 54°F12°C. Breezy from the ESE at 9 mph14 km/h. 12% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Breezy from the E at 7 to 8 mph12 to 12 km/h. 13% chance of drizzle throughout the night. | |||||||
| WednesdaySep 23 | 73°F23°C | 56°F13°C | 0.11 in2.8 mm· 17% | 56% | Showers | ESE 8 mph12 km/h | |
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 56°F13°C. Breezy from the SE at 8 to 9 mph13 to 14 km/h. 17% chance of showers throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the ESE at 7 to 8 mph12 to 12 km/h. 16% chance of drizzle throughout the night. | |||||||
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Coordinates: 39.8403°N, 88.9548°W·Elevation: 205m·Timezone: America/Chicago·Population: 73,254