Monthly outlook for Winthrop Harbor, IL: average high 43.8°, average low 32.1°. That is 0.3° above the climate normal for November. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 21 November (62.3°), the coolest 28 November (20°).
43.8°/32.1°
Average high / low
+0.3°
Above normal
1 / 5
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 November – 22 November
51.4°
44.5°
+3.8°
23 November – 2 December
31.2°
40.4°
-5.1°
3 December – 12 December
at normal
35.8°
—
November records over 66 years
72.5°10 November 2022All-time high
6.1°12 November 2019All-time low
Climate normals and records are computed from the nearest reference point — Kenosha (8 mi).
Sat, 1447° / 34°0
47 °
Winthrop Harbor, Saturday, 14 November
Clear. High 47°, low 34°.
Pressure30.27 inHg
Wind6.6 mph NW
Humidity60%
Visibility6.2 mi
Dew point32°
Sun, 1547° / 30°0
47 °
Winthrop Harbor, Sunday, 15 November
Clear. High 47°, low 30°.
Pressure30.45 inHg
Wind1.7 mph N
Humidity58%
Visibility6.2 mi
Dew point32°
Mon, 1650° / 32°0
50 °
Winthrop Harbor, Monday, 16 November
Clear. High 50°, low 32°.
Pressure30.50 inHg
Wind7.9 mph SW
Humidity53%
Visibility6.2 mi
Dew point32°
Tue, 1752° / 36°0
52 °
Winthrop Harbor, Tuesday, 17 November
Partly cloudy. High 52°, low 36°.
Pressure30.45 inHg
Wind8.1 mph SW
Humidity55%
Visibility6.2 mi
Dew point36°
Wed, 1854° / 36°0
54 °
Winthrop Harbor, Wednesday, 18 November
Partly cloudy. High 54°, low 36°.
Pressure30.30 inHg
Wind11.8 mph S
Humidity60%
Visibility—
Dew point37°
Thu, 1954° / 48°0.01
54 °
Winthrop Harbor, Thursday, 19 November
Light rain. High 54°, low 48°.
Pressure30.12 inHg
Wind15 mph SW
Humidity78%
Visibility—
Dew point45°
Fri, 2050° / 42°0
50 °
Winthrop Harbor, Friday, 20 November
Mostly clear. High 50°, low 42°.
Pressure30.39 inHg
Wind8.3 mph W
Humidity67%
Visibility—
Dew point38°
Sat, 2162° / 48°0.05
62 °
Winthrop Harbor, Saturday, 21 November
Light rain. High 62°, low 48°.
Pressure29.80 inHg
Wind27.8 mph S
Humidity64%
Visibility—
Dew point47°
Sun, 2255° / 35°0
55 °
Winthrop Harbor, Sunday, 22 November
Overcast. High 55°, low 35°.
Pressure30.03 inHg
Wind23.4 mph SW
Humidity48%
Visibility—
Dew point24°
Mon, 2333° / 29°0
33 °
Winthrop Harbor, Monday, 23 November
Overcast. High 33°, low 29°.
Pressure30.33 inHg
Wind11.8 mph NW
Humidity52%
Visibility—
Dew point17°
Tue, 2430° / 24°0
30 °
Winthrop Harbor, Tuesday, 24 November
Overcast. High 30°, low 24°.
Pressure30.15 inHg
Wind16.4 mph NW
Humidity42%
Visibility—
Dew point8°
Wed, 2528° / 22°0
28 °
Winthrop Harbor, Wednesday, 25 November
Partly cloudy. High 28°, low 22°.
Pressure30.06 inHg
Wind14.8 mph NW
Humidity37%
Visibility—
Dew point4°
Thu, 2632° / 21°0
32 °
Winthrop Harbor, Thursday, 26 November
Partly cloudy. High 32°, low 21°.
Pressure30.03 inHg
Wind22.5 mph SW
Humidity40%
Visibility—
Dew point9°
Fri, 2732° / 23°0
32 °
Winthrop Harbor, Friday, 27 November
Overcast. High 32°, low 23°.
Pressure29.94 inHg
Wind19.1 mph SW
Humidity37%
Visibility—
Dew point6°
Sat, 2831° / 20°0
31 °
Winthrop Harbor, Saturday, 28 November
Partly cloudy. High 31°, low 20°.
Pressure30.09 inHg
Wind11.2 mph W
Humidity30%
Visibility—
Dew point0°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2940° / 30°0.08
40 °
Winthrop Harbor, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high40°
Average low30°
Average precipitation0.08 in
Chance of precipitation38%
Record high60° (1998)
Record low9° (1976)
Mon, 3040° / 31°0.07
40 °
Winthrop Harbor, Monday, 30 November
Climate normal for this date — 60-year average.
Average high40°
Average low31°
Average precipitation0.07 in
Chance of precipitation30%
Record high61° (1998)
Record low12° (1976)
Tue, 0138° / 29°0.14
38 °
Winthrop Harbor, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high38°
Average low29°
Average precipitation0.14 in
Chance of precipitation42%
Record high59° (1970)
Record low10° (2025)
Wed, 0238° / 29°0.07
38 °
Winthrop Harbor, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high38°
Average low29°
Average precipitation0.07 in
Chance of precipitation32%
Record high60° (1982)
Record low7° (1976)
Thu, 0338° / 29°0.09
38 °
Winthrop Harbor, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high38°
Average low29°
Average precipitation0.09 in
Chance of precipitation38%
Record high61° (1998)
Record low11° (1985)
Fri, 0438° / 29°0.06
38 °
Winthrop Harbor, Friday, 4 December
Climate normal for this date — 60-year average.
Average high38°
Average low29°
Average precipitation0.06 in
Chance of precipitation27%
Record high61° (2017)
Record low4° (2025)
Sat, 0538° / 28°0.07
38 °
Winthrop Harbor, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high38°
Average low28°
Average precipitation0.07 in
Chance of precipitation35%
Record high62° (2001)
Record low7° (2005)
Sun, 0636° / 26°0.06
36 °
Winthrop Harbor, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high36°
Average low26°
Average precipitation0.06 in
Chance of precipitation30%
Record high57° (1998)
Record low5° (1972)
Mon, 0734° / 26°0.11
34 °
Winthrop Harbor, Monday, 7 December
Climate normal for this date — 60-year average.
Average high34°
Average low26°
Average precipitation0.11 in
Chance of precipitation28%
Record high52° (1980)
Record low3° (1972)
Tue, 0835° / 27°0.09
35 °
Winthrop Harbor, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high35°
Average low27°
Average precipitation0.09 in
Chance of precipitation30%
Record high56° (2023)
Record low10° (2006)
Wed, 0936° / 26°0.09
36 °
Winthrop Harbor, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high36°
Average low26°
Average precipitation0.09 in
Chance of precipitation45%
Record high51° (2023)
Record low-2° (1995)
Thu, 1035° / 25°0.09
35 °
Winthrop Harbor, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high35°
Average low25°
Average precipitation0.09 in
Chance of precipitation27%
Record high55° (2015)
Record low2° (1978)
Fri, 1134° / 25°0.11
34 °
Winthrop Harbor, Friday, 11 December
Climate normal for this date — 60-year average.
Average high34°
Average low25°
Average precipitation0.11 in
Chance of precipitation30%
Record high52° (2021)
Record low1° (1972)
Sat, 1235° / 25°0.09
35 °
Winthrop Harbor, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high35°
Average low25°
Average precipitation0.09 in
Chance of precipitation28%
Record high55° (1991)
Record low2° (2024)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Winthrop Harbor, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Winthrop Harbor, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.