10-day forecast for Sycamore, IL: 54° to 85°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
78°
Best day: Monday, August 17
85° · 0.9 in
Worst day: Sunday, August 9
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0985° / 63°0.9
Morning70°feels 71°
Afternoon77°feels 78°
Evening81°feels 88°
Overnight66°feels 66°
85 °
Sycamore, Sunday, 9 August
Heavy rain. High 85°, low 63°.
Pressure29.91 inHg
Wind10 mph SE
Humidity97%
Visibility6.2 mi
Dew point65°
Mon, 1083° / 70°0.04
Morning72°feels 73°
Afternoon82°feels 87°
Evening77°feels 79°
Overnight74°feels 75°
83 °
Sycamore, Monday, 10 August
Rain. High 83°, low 70°.
Pressure29.88 inHg
Wind10.5 mph S
Humidity77%
Visibility6.2 mi
Dew point72°
Tue, 1183° / 70°0.27
Morning75°feels 76°
Afternoon80°feels 85°
Evening71°feels 73°
Overnight72°feels 73°
83 °
Sycamore, Tuesday, 11 August
Rain. High 83°, low 70°.
Pressure29.80 inHg
Wind8.3 mph W
Humidity85%
Visibility6.2 mi
Dew point72°
Wed, 1281° / 64°0.02
Morning68°feels 69°
Afternoon79°feels 79°
Evening77°feels 78°
Overnight67°feels 68°
81 °
Sycamore, Wednesday, 12 August
Light rain. High 81°, low 64°.
Pressure29.88 inHg
Wind3.1 mph NW
Humidity79%
Visibility6.2 mi
Dew point68°
Thu, 1371° / 58°0.03
Morning65°feels 65°
Afternoon70°feels 70°
Evening65°feels 65°
Overnight59°feels 59°
71 °
Sycamore, Thursday, 13 August
Light rain. High 71°, low 58°.
Pressure29.94 inHg
Wind12.1 mph E
Humidity75%
Visibility—
Dew point61°
Fri, 1471° / 54°0
Morning60°feels 60°
Afternoon71°feels 70°
Evening66°feels 66°
Overnight58°feels 57°
71 °
Sycamore, Friday, 14 August
Clear. High 71°, low 54°.
Pressure30.18 inHg
Wind7.7 mph SE
Humidity60%
Visibility—
Dew point55°
Sat, 1573° / 55°0
Morning61°feels 60°
Afternoon71°feels 71°
Evening67°feels 67°
Overnight59°feels 59°
73 °
Sycamore, Saturday, 15 August
Overcast. High 73°, low 55°.
Pressure30.33 inHg
Wind6.8 mph S
Humidity61%
Visibility—
Dew point56°
Sun, 1675° / 56°0
Morning61°feels 61°
Afternoon73°feels 74°
Evening71°feels 71°
Overnight64°feels 64°
75 °
Sycamore, Sunday, 16 August
Mostly clear. High 75°, low 56°.
Pressure30.18 inHg
Wind11.2 mph S
Humidity68%
Visibility—
Dew point60°
Mon, 1778° / 64°0
Morning68°feels 69°
Afternoon73°feels 74°
Evening75°feels 77°
Overnight72°feels 73°
78 °
Sycamore, Monday, 17 August
Overcast. High 78°, low 64°.
Pressure30.00 inHg
Wind7.2 mph S
Humidity88%
Visibility—
Dew point67°
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 Sycamore, 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.