Monthly outlook for Clear Lake, IL: average high 56.1°, average low 40.5°. That is 4° above the climate normal for November. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 November (67.7°), the coolest 15 November (25.5°).
56.1°/40.5°
Average high / low
+4°
Above normal
3 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 November – 23 November
55.9°
50.6°
+2.9°
24 November – 3 December
56.6°
45.4°
+6.2°
4 December – 13 December
at normal
40.9°
—
November records over 66 years
78.3°1 November 2016All-time high
7.5°28 November 1977All-time low
Climate normals and records are computed from the nearest reference point — Springfield (5 mi).
Sun, 1550° / 26°0
50 °
Clear Lake, Sunday, 15 November
Clear. High 50°, low 26°.
Pressure30.47 inHg
Wind0.6 mph W
Humidity54%
Visibility6.2 mi
Dew point31°
Mon, 1653° / 31°0
53 °
Clear Lake, Monday, 16 November
Clear. High 53°, low 31°.
Pressure30.53 inHg
Wind3.4 mph S
Humidity50%
Visibility6.2 mi
Dew point34°
Tue, 1755° / 34°0
55 °
Clear Lake, Tuesday, 17 November
Clear. High 55°, low 34°.
Pressure30.50 inHg
Wind6.7 mph S
Humidity54%
Visibility6.2 mi
Dew point37°
Wed, 1858° / 40°0
58 °
Clear Lake, Wednesday, 18 November
Overcast. High 58°, low 40°.
Pressure30.36 inHg
Wind11.2 mph S
Humidity53%
Visibility6.2 mi
Dew point40°
Thu, 1964° / 47°0
64 °
Clear Lake, Thursday, 19 November
Clear. High 64°, low 47°.
Pressure30.24 inHg
Wind10.6 mph S
Humidity50%
Visibility—
Dew point42°
Fri, 2068° / 51°0
68 °
Clear Lake, Friday, 20 November
Overcast. High 68°, low 51°.
Pressure30.21 inHg
Wind13.4 mph S
Humidity45%
Visibility—
Dew point42°
Sat, 2164° / 53°0.07
64 °
Clear Lake, Saturday, 21 November
Light rain. High 64°, low 53°.
Pressure29.94 inHg
Wind19.8 mph S
Humidity69%
Visibility—
Dew point49°
Sun, 2252° / 41°0
52 °
Clear Lake, Sunday, 22 November
Partly cloudy. High 52°, low 41°.
Pressure30.30 inHg
Wind14.2 mph NW
Humidity47%
Visibility—
Dew point31°
Mon, 2347° / 34°0
47 °
Clear Lake, Monday, 23 November
Clear. High 47°, low 34°.
Pressure30.50 inHg
Wind10 mph NE
Humidity36%
Visibility—
Dew point19°
Tue, 2448° / 32°0
48 °
Clear Lake, Tuesday, 24 November
Overcast. High 48°, low 32°.
Pressure30.45 inHg
Wind12.4 mph SE
Humidity36%
Visibility—
Dew point19°
Wed, 2553° / 38°0
53 °
Clear Lake, Wednesday, 25 November
Overcast. High 53°, low 38°.
Pressure30.21 inHg
Wind9.3 mph SE
Humidity66%
Visibility—
Dew point35°
Thu, 2658° / 44°0
58 °
Clear Lake, Thursday, 26 November
Overcast. High 58°, low 44°.
Pressure30.30 inHg
Wind17.2 mph E
Humidity58%
Visibility—
Dew point42°
Fri, 2755° / 45°0.55
55 °
Clear Lake, Friday, 27 November
Rain. High 55°, low 45°.
Pressure30.18 inHg
Wind17.4 mph SE
Humidity64%
Visibility—
Dew point41°
Sat, 2859° / 54°0.23
59 °
Clear Lake, Saturday, 28 November
Rain. High 59°, low 54°.
Pressure30.00 inHg
Wind15.6 mph SE
Humidity79%
Visibility—
Dew point51°
Sun, 2966° / 54°0
66 °
Clear Lake, Sunday, 29 November
Overcast. High 66°, low 54°.
Pressure30.00 inHg
Wind12.4 mph S
Humidity60%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 3045° / 31°0.15
45 °
Clear Lake, Monday, 30 November
Climate normal for this date — 60-year average.
Average high45°
Average low31°
Average precipitation0.15 in
Chance of precipitation28%
Record high65° (1998)
Record low9° (1964)
Tue, 0143° / 30°0.13
43 °
Clear Lake, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high43°
Average low30°
Average precipitation0.13 in
Chance of precipitation32%
Record high66° (1970)
Record low10° (1985)
Wed, 0244° / 30°0.07
44 °
Clear Lake, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.07 in
Chance of precipitation30%
Record high70° (1982)
Record low8° (2006)
Thu, 0344° / 30°0.09
44 °
Clear Lake, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.09 in
Chance of precipitation32%
Record high71° (2012)
Record low7° (1985)
Fri, 0442° / 30°0.07
42 °
Clear Lake, Friday, 4 December
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.07 in
Chance of precipitation20%
Record high69° (1998)
Record low2° (2006)
Sat, 0543° / 29°0.07
43 °
Clear Lake, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high43°
Average low29°
Average precipitation0.07 in
Chance of precipitation27%
Record high67° (1998)
Record low3° (2025)
Sun, 0641° / 28°0.06
41 °
Clear Lake, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high41°
Average low28°
Average precipitation0.06 in
Chance of precipitation33%
Record high67° (1998)
Record low-2° (1964)
Mon, 0740° / 28°0.09
40 °
Clear Lake, Monday, 7 December
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.09 in
Chance of precipitation20%
Record high62° (1980)
Record low-2° (1977)
Tue, 0840° / 28°0.06
40 °
Clear Lake, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.06 in
Chance of precipitation25%
Record high68° (1991)
Record low-1° (2006)
Wed, 0941° / 27°0.08
41 °
Clear Lake, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.08 in
Chance of precipitation33%
Record high57° (1965)
Record low-4° (1977)
Thu, 1040° / 26°0.1
40 °
Clear Lake, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.1 in
Chance of precipitation22%
Record high63° (2021)
Record low-8° (1977)
Fri, 1140° / 26°0.1
40 °
Clear Lake, Friday, 11 December
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.1 in
Chance of precipitation33%
Record high64° (2021)
Record low-6° (1977)
Sat, 1240° / 27°0.07
40 °
Clear Lake, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high40°
Average low27°
Average precipitation0.07 in
Chance of precipitation22%
Record high67° (2015)
Record low-5° (2000)
Sun, 1341° / 27°0.08
41 °
Clear Lake, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high41°
Average low27°
Average precipitation0.08 in
Chance of precipitation33%
Record high64° (2015)
Record low-8° (1960)
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 Clear Lake, 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 Clear Lake, 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.