10-day forecast for Boulder, IL: 65° 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° · 1.82 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0995° / 74°0
Morning77°feels 78°
Afternoon93°feels 102°
Evening87°feels 94°
Overnight75°feels 76°
95 °
Boulder, Sunday, 9 August
Overcast. High 95°, low 74°.
Pressure30.00 inHg
Wind13.2 mph S
Humidity60%
Visibility6.2 mi
Dew point71°
Mon, 1095° / 75°0
Morning78°feels 79°
Afternoon95°feels 102°
Evening85°feels 89°
Overnight83°feels 89°
95 °
Boulder, Monday, 10 August
Partly cloudy. High 95°, low 75°.
Pressure29.97 inHg
Wind13.8 mph S
Humidity59%
Visibility6.2 mi
Dew point73°
Tue, 1199° / 78°0
Morning78°feels 79°
Afternoon97°feels 102°
Evening88°feels 93°
Overnight82°feels 84°
99 °
Boulder, Tuesday, 11 August
Light rain. High 99°, low 78°.
Pressure29.88 inHg
Wind12.2 mph SW
Humidity51%
Visibility6.2 mi
Dew point71°
Wed, 1289° / 71°0.23
Morning75°feels 76°
Afternoon86°feels 91°
Evening72°feels 73°
Overnight84°feels 87°
89 °
Boulder, Wednesday, 12 August
Rain. High 89°, low 71°.
Pressure29.85 inHg
Wind6.8 mph SW
Humidity66%
Visibility6.2 mi
Dew point70°
Thu, 1382° / 68°1.82
Morning73°feels 76°
Afternoon81°feels 85°
Evening73°feels 74°
Overnight69°feels 70°
82 °
Boulder, Thursday, 13 August
Heavy rain. High 82°, low 68°.
Pressure29.94 inHg
Wind13.1 mph E
Humidity70%
Visibility—
Dew point70°
Fri, 1475° / 68°0.83
Morning69°feels 71°
Afternoon72°feels 74°
Evening72°feels 73°
Overnight70°feels 71°
75 °
Boulder, Friday, 14 August
Heavy rain. High 75°, low 68°.
Pressure30.03 inHg
Wind11 mph E
Humidity91%
Visibility—
Dew point69°
Sat, 1577° / 67°0.15
Morning69°feels 70°
Afternoon75°feels 75°
Evening73°feels 74°
Overnight68°feels 69°
77 °
Boulder, Saturday, 15 August
Light rain. High 77°, low 67°.
Pressure30.18 inHg
Wind15.6 mph E
Humidity74%
Visibility—
Dew point65°
Sun, 1681° / 65°0.16
Morning69°feels 71°
Afternoon80°feels 83°
Evening76°feels 78°
Overnight70°feels 71°
81 °
Boulder, Sunday, 16 August
Light rain. High 81°, low 65°.
Pressure30.06 inHg
Wind8.9 mph E
Humidity78%
Visibility—
Dew point71°
Mon, 1781° / 68°0.1
Morning71°feels 72°
Afternoon77°feels 78°
Evening77°feels 78°
Overnight71°feels 73°
81 °
Boulder, Monday, 17 August
Light rain. High 81°, low 68°.
Pressure30.03 inHg
Wind6.9 mph NE
Humidity83%
Visibility—
Dew point70°
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 Boulder, 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.