10-day forecast for Decatur, IL: 28° to 68°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
67°
Best day: Saturday, November 21
44°
Worst day: Friday, November 13
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 1344° / 34°0
Morning39°feels 31°
Afternoon44°feels 39°
Evening38°feels 33°
Overnight36°feels 29°
44 °
Decatur, Friday, 13 November
Overcast. High 44°, low 34°.
Pressure30.09 inHg
Wind11.8 mph N
Humidity62%
Visibility6.2 mi
Dew point27°
Sat, 1447° / 29°0
Morning32°feels 27°
Afternoon47°feels 45°
Evening35°feels 32°
Overnight31°feels 25°
47 °
Decatur, Saturday, 14 November
Clear. High 47°, low 29°.
Pressure30.33 inHg
Wind4.1 mph NW
Humidity58%
Visibility6.2 mi
Dew point30°
Sun, 1548° / 28°0
Morning33°feels 31°
Afternoon48°feels 48°
Evening37°feels 37°
Overnight30°feels 30°
48 °
Decatur, Sunday, 15 November
Partly cloudy. High 48°, low 28°.
Pressure30.47 inHg
Wind2.5 mph NW
Humidity53%
Visibility6.2 mi
Dew point28°
Mon, 1651° / 31°0
Morning38°feels 38°
Afternoon49°feels 47°
Evening42°feels 41°
Overnight32°feels 32°
51 °
Decatur, Monday, 16 November
Clear. High 51°, low 31°.
Pressure30.50 inHg
Wind3.2 mph SW
Humidity48%
Visibility6.2 mi
Dew point30°
Tue, 1754° / 33°0
Morning38°feels 35°
Afternoon51°feels 49°
Evening43°feels 40°
Overnight39°feels 35°
54 °
Decatur, Tuesday, 17 November
Clear. High 54°, low 33°.
Pressure30.47 inHg
Wind4.9 mph SE
Humidity50%
Visibility—
Dew point32°
Wed, 1860° / 38°0
Morning44°feels 39°
Afternoon57°feels 54°
Evening51°feels 48°
Overnight47°feels 43°
60 °
Decatur, Wednesday, 18 November
Mostly clear. High 60°, low 38°.
Pressure30.36 inHg
Wind13.2 mph S
Humidity37%
Visibility—
Dew point29°
Thu, 1967° / 47°0.01
Morning51°feels 46°
Afternoon61°feels 59°
Evening56°feels 54°
Overnight52°feels 49°
67 °
Decatur, Thursday, 19 November
Light rain. High 67°, low 47°.
Pressure30.15 inHg
Wind17.4 mph SW
Humidity42%
Visibility—
Dew point36°
Fri, 2068° / 49°0.03
Morning54°feels 52°
Afternoon65°feels 65°
Evening60°feels 59°
Overnight56°feels 55°
68 °
Decatur, Friday, 20 November
Light rain. High 68°, low 49°.
Pressure30.21 inHg
Wind10.6 mph SW
Humidity58%
Visibility—
Dew point49°
Sat, 2167° / 57°0.01
Morning58°feels 58°
Afternoon60°feels 59°
Evening62°feels 61°
Overnight60°feels 58°
67 °
Decatur, Saturday, 21 November
Light rain. High 67°, low 57°.
Pressure30.15 inHg
Wind14.1 mph S
Humidity70%
Visibility—
Dew point50°
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.