10-day forecast for Old Kaskaskia, IL: 67° to 108°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
107°
Best day: Sunday, August 16
91°
Worst day: Monday, August 17
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 10101° / 76°0
Morning80°feels 80°
Afternoon101°feels 103°
Evening89°feels 93°
Overnight82°feels 85°
101 °
Old Kaskaskia, Monday, 10 August
Clear. High 101°, low 76°.
Pressure29.97 inHg
Wind13.6 mph SW
Humidity36%
Visibility6.2 mi
Dew point66°
Tue, 11104° / 77°0
Morning83°feels 86°
Afternoon103°feels 104°
Evening89°feels 94°
Overnight84°feels 86°
104 °
Old Kaskaskia, Tuesday, 11 August
Light rain. High 104°, low 77°.
Pressure29.91 inHg
Wind12.4 mph SW
Humidity30%
Visibility6.2 mi
Dew point63°
Wed, 12101° / 76°0.02
Morning79°feels 79°
Afternoon101°feels 104°
Evening89°feels 91°
Overnight87°feels 88°
101 °
Old Kaskaskia, Wednesday, 12 August
Light rain. High 101°, low 76°.
Pressure29.83 inHg
Wind10.1 mph W
Humidity34%
Visibility6.2 mi
Dew point66°
Thu, 13101° / 72°0.07
Morning79°feels 82°
Afternoon94°feels 100°
Evening93°feels 99°
Overnight75°feels 76°
101 °
Old Kaskaskia, Thursday, 13 August
Light rain. High 101°, low 72°.
Pressure29.85 inHg
Wind14.9 mph S
Humidity44%
Visibility—
Dew point66°
Fri, 14105° / 78°0.01
Morning84°feels 85°
Afternoon99°feels 102°
Evening87°feels 95°
Overnight79°feels 79°
105 °
Old Kaskaskia, Friday, 14 August
Light rain. High 105°, low 78°.
Pressure29.94 inHg
Wind16 mph NE
Humidity29%
Visibility—
Dew point60°
Sat, 15108° / 74°0.07
Morning81°feels 83°
Afternoon101°feels 103°
Evening99°feels 99°
Overnight82°feels 85°
108 °
Old Kaskaskia, Saturday, 15 August
Light rain. High 108°, low 74°.
Pressure30.06 inHg
Wind11 mph S
Humidity30%
Visibility—
Dew point60°
Sun, 16107° / 76°0.01
Morning90°feels 90°
Afternoon104°feels 105°
Evening88°feels 96°
Overnight78°feels 79°
107 °
Old Kaskaskia, Sunday, 16 August
Light rain. High 107°, low 76°.
Pressure29.97 inHg
Wind16 mph NE
Humidity19%
Visibility—
Dew point53°
Mon, 1791° / 67°0.02
Morning73°feels 73°
Afternoon87°feels 86°
Evening80°feels 81°
Overnight73°feels 73°
91 °
Old Kaskaskia, Monday, 17 August
Light rain. High 91°, low 67°.
Pressure30.06 inHg
Wind11.2 mph NE
Humidity34%
Visibility—
Dew point54°
Tue, 18104° / 68°0.06
Morning76°feels 77°
Afternoon97°feels 99°
Evening98°feels 98°
Overnight83°feels 84°
104 °
Old Kaskaskia, Tuesday, 18 August
Light rain. High 104°, low 68°.
Pressure29.83 inHg
Wind13.4 mph SW
Humidity36%
Visibility—
Dew point61°
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 Old Kaskaskia, 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.