10-day forecast for Derby, IL: 67° to 99°, with precipitation expected on 6 days. The table below breaks each day into morning, afternoon, evening and overnight.
99°
Best day: Tuesday, August 11
82° · 0.93 in
Worst day: Friday, August 14
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0992° / 73°0
Morning79°feels 80°
Afternoon92°feels 96°
Evening84°feels 92°
Overnight74°feels 75°
92 °
Derby, Sunday, 9 August
Clear. High 92°, low 73°.
Pressure30.03 inHg
Wind10.2 mph SW
Humidity50%
Visibility6.2 mi
Dew point69°
Mon, 1096° / 74°0
Morning79°feels 79°
Afternoon95°feels 100°
Evening83°feels 89°
Overnight77°feels 78°
96 °
Derby, Monday, 10 August
Overcast. High 96°, low 74°.
Pressure30.03 inHg
Wind11.1 mph SW
Humidity51%
Visibility6.2 mi
Dew point69°
Tue, 1199° / 77°0
Morning81°feels 84°
Afternoon98°feels 102°
Evening87°feels 93°
Overnight79°feels 79°
99 °
Derby, Tuesday, 11 August
Clear. High 99°, low 77°.
Pressure29.94 inHg
Wind13.1 mph SW
Humidity41%
Visibility6.2 mi
Dew point68°
Wed, 1290° / 73°0.31
Morning78°feels 79°
Afternoon79°feels 79°
Evening74°feels 75°
Overnight83°feels 86°
90 °
Derby, Wednesday, 12 August
Rain. High 90°, low 73°.
Pressure29.85 inHg
Wind3.7 mph NW
Humidity61%
Visibility6.2 mi
Dew point70°
Thu, 1377° / 70°0.47
Morning73°feels 74°
Afternoon75°feels 76°
Evening76°feels 78°
Overnight72°feels 74°
77 °
Derby, Thursday, 13 August
Rain. High 77°, low 70°.
Pressure29.94 inHg
Wind7.1 mph N
Humidity93%
Visibility—
Dew point72°
Fri, 1482° / 70°0.93
Morning74°feels 77°
Afternoon81°feels 86°
Evening75°feels 76°
Overnight70°feels 71°
82 °
Derby, Friday, 14 August
Heavy rain. High 82°, low 70°.
Pressure30.00 inHg
Wind10 mph NE
Humidity73%
Visibility—
Dew point71°
Sat, 1579° / 67°0.16
Morning69°feels 70°
Afternoon76°feels 77°
Evening74°feels 75°
Overnight69°feels 70°
79 °
Derby, Saturday, 15 August
Light rain. High 79°, low 67°.
Pressure30.21 inHg
Wind10.4 mph E
Humidity78%
Visibility—
Dew point67°
Sun, 1693° / 67°0.13
Morning74°feels 77°
Afternoon90°feels 97°
Evening82°feels 90°
Overnight74°feels 75°
93 °
Derby, Sunday, 16 August
Light rain. High 93°, low 67°.
Pressure30.03 inHg
Wind7.9 mph E
Humidity52%
Visibility—
Dew point68°
Mon, 1789° / 71°0.1
Morning75°feels 78°
Afternoon83°feels 89°
Evening81°feels 87°
Overnight73°feels 75°
89 °
Derby, Monday, 17 August
Light rain. High 89°, low 71°.
Pressure30.03 inHg
Wind6 mph NE
Humidity75%
Visibility—
Dew point73°
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 Derby, 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.