10-day forecast for Decatur, IL: 28° to 66°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
66°
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
Morning40°feels 35°
Afternoon43°feels 37°
Evening38°feels 33°
Overnight36°feels 28°
44 °
Decatur, Friday, 13 November
Overcast. High 44°, low 34°.
Pressure30.09 inHg
Wind12.5 mph N
Humidity63%
Visibility6.2 mi
Dew point25°
Sat, 1446° / 28°0
Morning32°feels 27°
Afternoon46°feels 44°
Evening35°feels 32°
Overnight31°feels 25°
46 °
Decatur, Saturday, 14 November
Clear. High 46°, low 28°.
Pressure30.33 inHg
Wind5.1 mph NW
Humidity57%
Visibility6.2 mi
Dew point27°
Sun, 1549° / 28°0
Morning33°feels 31°
Afternoon49°feels 49°
Evening37°feels 37°
Overnight30°feels 30°
49 °
Decatur, Sunday, 15 November
Partly cloudy. High 49°, low 28°.
Pressure30.45 inHg
Wind2.8 mph N
Humidity53%
Visibility6.2 mi
Dew point28°
Mon, 1651° / 31°0
Morning38°feels 38°
Afternoon51°feels 48°
Evening41°feels 39°
Overnight32°feels 32°
51 °
Decatur, Monday, 16 November
Clear. High 51°, low 31°.
Pressure30.50 inHg
Wind3.3 mph SW
Humidity50%
Visibility6.2 mi
Dew point32°
Tue, 1754° / 33°0
Morning39°feels 35°
Afternoon51°feels 49°
Evening44°feels 40°
Overnight40°feels 35°
54 °
Decatur, Tuesday, 17 November
Clear. High 54°, low 33°.
Pressure30.47 inHg
Wind6.5 mph SE
Humidity52%
Visibility—
Dew point33°
Wed, 1861° / 37°0
Morning43°feels 39°
Afternoon57°feels 55°
Evening54°feels 51°
Overnight50°feels 47°
61 °
Decatur, Wednesday, 18 November
Overcast. High 61°, low 37°.
Pressure30.30 inHg
Wind15.7 mph S
Humidity41%
Visibility—
Dew point32°
Thu, 1960° / 51°0.01
Morning53°feels 51°
Afternoon58°feels 56°
Evening58°feels 55°
Overnight57°feels 54°
60 °
Decatur, Thursday, 19 November
Light rain. High 60°, low 51°.
Pressure30.24 inHg
Wind14.6 mph S
Humidity38%
Visibility—
Dew point32°
Fri, 2064° / 52°0.04
Morning54°feels 52°
Afternoon57°feels 55°
Evening56°feels 54°
Overnight55°feels 52°
64 °
Decatur, Friday, 20 November
Light rain. High 64°, low 52°.
Pressure30.33 inHg
Wind7.9 mph S
Humidity54%
Visibility—
Dew point40°
Sat, 2166° / 49°0
Morning53°feels 50°
Afternoon63°feels 61°
Evening58°feels 56°
Overnight55°feels 53°
66 °
Decatur, Saturday, 21 November
Overcast. High 66°, low 49°.
Pressure30.24 inHg
Wind12.9 mph S
Humidity47%
Visibility—
Dew point41°
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.