10-day forecast for Potomac, IL: 63° to 93°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
93°
Best day: Monday, August 10
83° · 0.94 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1093° / 75°0.02
Morning78°feels 80°
Afternoon93°feels 106°
Evening84°feels 97°
Overnight78°feels 80°
93 °
Potomac, Monday, 10 August
Light rain. High 93°, low 75°.
Pressure29.91 inHg
Wind11.7 mph SW
Humidity68%
Visibility6.2 mi
Dew point74°
Tue, 1189° / 76°0
Morning77°feels 78°
Afternoon88°feels 99°
Evening84°feels 90°
Overnight77°feels 78°
89 °
Potomac, Tuesday, 11 August
Overcast. High 89°, low 76°.
Pressure29.85 inHg
Wind18.1 mph SW
Humidity71%
Visibility6.2 mi
Dew point74°
Wed, 1284° / 68°0.08
Morning70°feels 71°
Afternoon83°feels 87°
Evening77°feels 79°
Overnight71°feels 72°
84 °
Potomac, Wednesday, 12 August
Light rain. High 84°, low 68°.
Pressure29.88 inHg
Wind4.7 mph E
Humidity67%
Visibility6.2 mi
Dew point69°
Thu, 1383° / 66°0.94
Morning69°feels 70°
Afternoon84°feels 90°
Evening72°feels 74°
Overnight70°feels 71°
83 °
Potomac, Thursday, 13 August
Heavy rain. High 83°, low 66°.
Pressure29.97 inHg
Wind9.2 mph SE
Humidity70%
Visibility6.2 mi
Dew point70°
Fri, 1480° / 69°0.72
Morning71°feels 72°
Afternoon77°feels 79°
Evening77°feels 79°
Overnight72°feels 74°
80 °
Potomac, Friday, 14 August
Heavy rain. High 80°, low 69°.
Pressure30.03 inHg
Wind9.9 mph SE
Humidity85%
Visibility—
Dew point71°
Sat, 1591° / 72°0.03
Morning77°feels 81°
Afternoon87°feels 99°
Evening83°feels 92°
Overnight81°feels 84°
91 °
Potomac, Saturday, 15 August
Light rain. High 91°, low 72°.
Pressure29.94 inHg
Wind13.3 mph S
Humidity72%
Visibility—
Dew point75°
Sun, 1685° / 70°0
Morning76°feels 76°
Afternoon77°feels 78°
Evening72°feels 73°
Overnight71°feels 72°
85 °
Potomac, Sunday, 16 August
Partly cloudy. High 85°, low 70°.
Pressure29.97 inHg
Wind17.9 mph SW
Humidity77%
Visibility—
Dew point70°
Mon, 1780° / 63°0.01
Morning66°feels 67°
Afternoon75°feels 76°
Evening77°feels 78°
Overnight71°feels 73°
80 °
Potomac, Monday, 17 August
Light rain. High 80°, low 63°.
Pressure30.03 inHg
Wind11.7 mph SE
Humidity74%
Visibility—
Dew point65°
Tue, 1886° / 74°0
Morning82°feels 84°
Afternoon84°feels 92°
Evening82°feels 88°
Overnight77°feels 78°
86 °
Potomac, Tuesday, 18 August
Overcast. High 86°, low 74°.
Pressure29.88 inHg
Wind14.9 mph S
Humidity72%
Visibility—
Dew point74°
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 Potomac, 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.