10-day forecast for Winthrop Harbor, IL: 62° to 87°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
81°
Best day: Wednesday, August 12
78° · 1.01 in
Worst day: Tuesday, August 11
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1087° / 71°0.31
Morning75°feels 76°
Afternoon87°feels 99°
Evening77°feels 78°
Overnight76°feels 78°
87 °
Winthrop Harbor, Monday, 10 August
Rain. High 87°, low 71°.
Pressure29.91 inHg
Wind5.5 mph NE
Humidity79%
Visibility6.2 mi
Dew point70°
Tue, 1178° / 68°1.01
Morning71°feels 72°
Afternoon70°feels 71°
Evening68°feels 69°
Overnight70°feels 71°
78 °
Winthrop Harbor, Tuesday, 11 August
Heavy rain. High 78°, low 68°.
Pressure29.85 inHg
Wind8.2 mph SE
Humidity77%
Visibility5.6 mi
Dew point69°
Wed, 1281° / 66°0
Morning70°feels 71°
Afternoon81°feels 83°
Evening70°feels 71°
Overnight67°feels 67°
81 °
Winthrop Harbor, Wednesday, 12 August
Clear. High 81°, low 66°.
Pressure29.85 inHg
Wind3.9 mph N
Humidity68%
Visibility6.2 mi
Dew point67°
Thu, 1372° / 66°0
Morning71°feels 72°
Afternoon71°feels 71°
Evening68°feels 67°
Overnight68°feels 69°
72 °
Winthrop Harbor, Thursday, 13 August
Overcast. High 72°, low 66°.
Pressure29.97 inHg
Wind8.9 mph NE
Humidity71%
Visibility—
Dew point61°
Fri, 1471° / 66°0
Morning67°feels 67°
Afternoon70°feels 69°
Evening67°feels 67°
Overnight66°feels 65°
71 °
Winthrop Harbor, Friday, 14 August
Partly cloudy. High 71°, low 66°.
Pressure30.18 inHg
Wind14.2 mph NE
Humidity57%
Visibility—
Dew point54°
Sat, 1572° / 66°0.03
Morning69°feels 69°
Afternoon70°feels 70°
Evening71°feels 71°
Overnight68°feels 69°
72 °
Winthrop Harbor, Saturday, 15 August
Light rain. High 72°, low 66°.
Pressure30.24 inHg
Wind15.9 mph SE
Humidity62%
Visibility—
Dew point56°
Sun, 1675° / 66°0.09
Morning68°feels 69°
Afternoon73°feels 74°
Evening69°feels 69°
Overnight66°feels 67°
75 °
Winthrop Harbor, Sunday, 16 August
Light rain. High 75°, low 66°.
Pressure29.97 inHg
Wind12.6 mph N
Humidity82%
Visibility—
Dew point67°
Mon, 1774° / 65°0
Morning67°feels 67°
Afternoon73°feels 73°
Evening69°feels 69°
Overnight66°feels 66°
74 °
Winthrop Harbor, Monday, 17 August
Light rain. High 74°, low 65°.
Pressure30.09 inHg
Wind7.5 mph N
Humidity59%
Visibility—
Dew point57°
Tue, 1874° / 62°0
Morning64°feels 64°
Afternoon69°feels 69°
Evening72°feels 73°
Overnight68°feels 68°
74 °
Winthrop Harbor, Tuesday, 18 August
Overcast. High 74°, low 62°.
Pressure29.91 inHg
Wind8.3 mph S
Humidity71%
Visibility—
Dew point57°
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 Winthrop Harbor, 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.