10-day forecast for Decatur, IL: 27° to 67°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
67°
Best day: Saturday, November 21
51°
Worst day: Tuesday, November 24
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1654° / 28°0
Morning37°feels 33°
Afternoon54°feels 51°
Evening37°feels 33°
Overnight30°feels 30°
54 °
Decatur, Monday, 16 November
Clear. High 54°, low 28°.
Pressure30.53 inHg
Wind4.7 mph SW
Humidity53%
Visibility6.2 mi
Dew point35°
Tue, 1756° / 30°0
Morning38°feels 33°
Afternoon56°feels 54°
Evening44°feels 40°
Overnight32°feels 28°
56 °
Decatur, Tuesday, 17 November
Clear. High 56°, low 30°.
Pressure30.53 inHg
Wind7.3 mph S
Humidity56%
Visibility6.2 mi
Dew point38°
Wed, 1859° / 40°0
Morning43°feels 37°
Afternoon59°feels 57°
Evening49°feels 44°
Overnight41°feels 36°
59 °
Decatur, Wednesday, 18 November
Overcast. High 59°, low 40°.
Pressure30.39 inHg
Wind11.5 mph S
Humidity50%
Visibility6.2 mi
Dew point39°
Thu, 1964° / 45°0
Morning50°feels 46°
Afternoon63°feels 62°
Evening55°feels 54°
Overnight46°feels 41°
64 °
Decatur, Thursday, 19 November
Clear. High 64°, low 45°.
Pressure30.27 inHg
Wind11.5 mph SW
Humidity60%
Visibility6.2 mi
Dew point48°
Fri, 2065° / 44°0
Morning49°feels 49°
Afternoon61°feels 60°
Evening55°feels 54°
Overnight52°feels 51°
65 °
Decatur, Friday, 20 November
Clear. High 65°, low 44°.
Pressure30.24 inHg
Wind9.6 mph SE
Humidity68%
Visibility—
Dew point49°
Sat, 2167° / 50°0
Morning54°feels 51°
Afternoon65°feels 63°
Evening60°feels 58°
Overnight53°feels 51°
67 °
Decatur, Saturday, 21 November
Clear. High 67°, low 50°.
Pressure29.97 inHg
Wind15.9 mph S
Humidity37%
Visibility—
Dew point37°
Sun, 2256° / 42°0
Morning46°feels 42°
Afternoon54°feels 51°
Evening46°feels 42°
Overnight43°feels 38°
56 °
Decatur, Sunday, 22 November
Clear. High 56°, low 42°.
Pressure30.12 inHg
Wind10.5 mph NW
Humidity39%
Visibility—
Dew point29°
Mon, 2351° / 37°0
Morning41°feels 36°
Afternoon49°feels 44°
Evening42°feels 37°
Overnight40°feels 33°
51 °
Decatur, Monday, 23 November
Partly cloudy. High 51°, low 37°.
Pressure30.27 inHg
Wind11.3 mph NE
Humidity46%
Visibility—
Dew point28°
Tue, 2451° / 36°0.02
Morning39°feels 33°
Afternoon49°feels 44°
Evening47°feels 45°
Overnight45°feels 41°
51 °
Decatur, Tuesday, 24 November
Light rain. High 51°, low 36°.
Pressure30.18 inHg
Wind11.9 mph E
Humidity50%
Visibility—
Dew point29°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Decatur, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.