Monthly outlook for Piasa, IL: average high 53°, average low 36.3°. That is 1° above the climate normal for November. Precipitation is expected on 2 days (about 1.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 November (67.8°), the coolest 26 November (25.6°).
53°/36.3°
Average high / low
+1°
Above normal
2 / 5
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 November – 20 November
55.5°
52.4°
+1.7°
21 November – 30 November
49°
48.1°
+0.5°
1 December – 10 December
at normal
43.5°
—
November records over 66 years
79°8 November 2023All-time high
-0.6°8 November 1991All-time low
Climate normals and records are computed from the nearest reference point — Jerseyville (11 mi).
Thu, 1252° / 35°0
52 °
Piasa, Thursday, 12 November
Overcast. High 52°, low 35°.
Pressure30.00 inHg
Wind15.1 mph N
Humidity54%
Visibility6.2 mi
Dew point30°
Fri, 1347° / 32°0
47 °
Piasa, Friday, 13 November
Overcast. High 47°, low 32°.
Pressure30.12 inHg
Wind12.1 mph N
Humidity63%
Visibility6.2 mi
Dew point25°
Sat, 1446° / 29°0
46 °
Piasa, Saturday, 14 November
Clear. High 46°, low 29°.
Pressure30.33 inHg
Wind4.7 mph N
Humidity57%
Visibility6.2 mi
Dew point25°
Sun, 1549° / 30°0
49 °
Piasa, Sunday, 15 November
Overcast. High 49°, low 30°.
Pressure30.45 inHg
Wind1.1 mph SW
Humidity51%
Visibility6.2 mi
Dew point28°
Mon, 1653° / 31°0
53 °
Piasa, Monday, 16 November
Clear. High 53°, low 31°.
Pressure30.47 inHg
Wind7 mph S
Humidity47%
Visibility—
Dew point30°
Tue, 1756° / 35°0
56 °
Piasa, Tuesday, 17 November
Clear. High 56°, low 35°.
Pressure30.45 inHg
Wind7.9 mph S
Humidity47%
Visibility—
Dew point32°
Wed, 1858° / 36°0
58 °
Piasa, Wednesday, 18 November
Clear. High 58°, low 36°.
Pressure30.36 inHg
Wind10.1 mph S
Humidity35%
Visibility—
Dew point26°
Thu, 1960° / 40°0
60 °
Piasa, Thursday, 19 November
Overcast. High 60°, low 40°.
Pressure30.24 inHg
Wind11.5 mph S
Humidity35%
Visibility—
Dew point28°
Fri, 2066° / 46°0
66 °
Piasa, Friday, 20 November
Overcast. High 66°, low 46°.
Pressure30.12 inHg
Wind10.8 mph SW
Humidity50%
Visibility—
Dew point42°
Sat, 2159° / 45°0
59 °
Piasa, Saturday, 21 November
Partly cloudy. High 59°, low 45°.
Pressure30.15 inHg
Wind7.2 mph SE
Humidity57%
Visibility—
Dew point41°
Sun, 2268° / 50°0.02
68 °
Piasa, Sunday, 22 November
Light rain. High 68°, low 50°.
Pressure29.80 inHg
Wind16 mph S
Humidity40%
Visibility—
Dew point38°
Mon, 2351° / 42°0.07
51 °
Piasa, Monday, 23 November
Light rain. High 51°, low 42°.
Pressure30.03 inHg
Wind10.3 mph NW
Humidity61%
Visibility—
Dew point34°
Tue, 2443° / 33°1.51
43 °
Piasa, Tuesday, 24 November
Snow. High 43°, low 33°.
Pressure29.77 inHg
Wind19.9 mph N
Humidity93%
Visibility—
Dew point36°
Wed, 2537° / 27°0.02
37 °
Piasa, Wednesday, 25 November
Light snow. High 37°, low 27°.
Pressure30.18 inHg
Wind16.1 mph NW
Humidity72%
Visibility—
Dew point26°
Thu, 2637° / 26°0
37 °
Piasa, Thursday, 26 November
Overcast. High 37°, low 26°.
Pressure30.56 inHg
Wind7 mph NW
Humidity53%
Visibility—
Dew point19°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2747° / 35°0.21
47 °
Piasa, Friday, 27 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.21 in
Chance of precipitation43%
Record high69° (1989)
Record low13° (1993)
Sat, 2845° / 32°0.09
45 °
Piasa, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.09 in
Chance of precipitation22%
Record high69° (1998)
Record low6° (1977)
Sun, 2946° / 33°0.07
46 °
Piasa, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.07 in
Chance of precipitation25%
Record high69° (1998)
Record low14° (1976)
Mon, 3046° / 32°0.17
46 °
Piasa, Monday, 30 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.17 in
Chance of precipitation28%
Record high65° (1998)
Record low10° (1964)
Tue, 0145° / 32°0.11
45 °
Piasa, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.11 in
Chance of precipitation28%
Record high66° (1970)
Record low12° (1985)
Wed, 0246° / 32°0.08
46 °
Piasa, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.08 in
Chance of precipitation25%
Record high69° (1982)
Record low6° (2006)
Thu, 0345° / 32°0.11
45 °
Piasa, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.11 in
Chance of precipitation28%
Record high71° (2012)
Record low10° (1985)
Fri, 0444° / 31°0.08
44 °
Piasa, Friday, 4 December
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.08 in
Chance of precipitation28%
Record high69° (1998)
Record low3° (2006)
Sat, 0545° / 30°0.08
45 °
Piasa, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high45°
Average low30°
Average precipitation0.08 in
Chance of precipitation28%
Record high70° (1998)
Record low4° (2025)
Sun, 0642° / 29°0.06
42 °
Piasa, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.06 in
Chance of precipitation38%
Record high69° (1998)
Record low2° (1964)
Mon, 0741° / 29°0.1
41 °
Piasa, Monday, 7 December
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.1 in
Chance of precipitation20%
Record high65° (1980)
Record low-2° (1977)
Tue, 0842° / 29°0.07
42 °
Piasa, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.07 in
Chance of precipitation30%
Record high69° (1991)
Record low-1° (2006)
Wed, 0942° / 29°0.07
42 °
Piasa, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.07 in
Chance of precipitation30%
Record high60° (2021)
Record low1° (1977)
Thu, 1042° / 27°0.11
42 °
Piasa, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high42°
Average low27°
Average precipitation0.11 in
Chance of precipitation25%
Record high64° (2021)
Record low-5° (1977)
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 Piasa, 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 Piasa, 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.