Monthly outlook for Banner, IL: average high 66°, average low 49.3°. That is 3.6° above the climate normal for October. Precipitation is expected on 3 days (about 1.5 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 24 October (76.7°), the coolest 17 October (37.8°).
66°/49.3°
Average high / low
+3.6°
Above normal
3 / 5
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
67.7°
60.6°
+4°
26 October – 4 November
63.2°
56.7°
+3.7°
5 November – 14 November
at normal
51.4°
—
October records over 66 years
88.9°3 October 2006All-time high
19.9°22 October 1976All-time low
Climate normals and records are computed from the nearest reference point — Trivoli (13 mi).
Sat, 1756° / 38°0
56 °
Banner, Saturday, 17 October
Clear. High 56°, low 38°.
Pressure30.59 inHg
Wind0.9 mph S
Humidity45%
Visibility6.2 mi
Dew point29°
Sun, 1862° / 42°0
62 °
Banner, Sunday, 18 October
Clear. High 62°, low 42°.
Pressure30.47 inHg
Wind10.9 mph S
Humidity51%
Visibility6.2 mi
Dew point40°
Mon, 1965° / 43°0
65 °
Banner, Monday, 19 October
Clear. High 65°, low 43°.
Pressure30.39 inHg
Wind6.1 mph S
Humidity55%
Visibility6.2 mi
Dew point43°
Tue, 2067° / 47°0
67 °
Banner, Tuesday, 20 October
Clear. High 67°, low 47°.
Pressure30.33 inHg
Wind5.8 mph S
Humidity47%
Visibility—
Dew point43°
Wed, 2170° / 52°0
70 °
Banner, Wednesday, 21 October
Overcast. High 70°, low 52°.
Pressure30.30 inHg
Wind5.9 mph SE
Humidity48%
Visibility—
Dew point44°
Thu, 2276° / 54°0
76 °
Banner, Thursday, 22 October
Partly cloudy. High 76°, low 54°.
Pressure30.24 inHg
Wind7.5 mph S
Humidity31%
Visibility—
Dew point38°
Fri, 2376° / 56°0
76 °
Banner, Friday, 23 October
Partly cloudy. High 76°, low 56°.
Pressure30.15 inHg
Wind10.9 mph SE
Humidity27%
Visibility—
Dew point36°
Sat, 2477° / 58°0
77 °
Banner, Saturday, 24 October
Overcast. High 77°, low 58°.
Pressure30.18 inHg
Wind9.3 mph S
Humidity30%
Visibility—
Dew point38°
Sun, 2574° / 56°0
74 °
Banner, Sunday, 25 October
Overcast. High 74°, low 56°.
Pressure30.24 inHg
Wind7.6 mph E
Humidity34%
Visibility—
Dew point40°
Mon, 2674° / 58°0
74 °
Banner, Monday, 26 October
Overcast. High 74°, low 58°.
Pressure30.00 inHg
Wind12.9 mph SE
Humidity31%
Visibility—
Dew point37°
Tue, 2763° / 46°0
63 °
Banner, Tuesday, 27 October
Clear. High 63°, low 46°.
Pressure30.03 inHg
Wind12.4 mph W
Humidity55%
Visibility—
Dew point42°
Wed, 2857° / 49°1.39
57 °
Banner, Wednesday, 28 October
Heavy rain. High 57°, low 49°.
Pressure29.62 inHg
Wind24.2 mph W
Humidity97%
Visibility—
Dew point55°
Thu, 2958° / 46°0.1
58 °
Banner, Thursday, 29 October
Light rain. High 58°, low 46°.
Pressure29.94 inHg
Wind22.3 mph W
Humidity62%
Visibility—
Dew point43°
Fri, 3064° / 48°0
64 °
Banner, Friday, 30 October
Mostly clear. High 64°, low 48°.
Pressure30.06 inHg
Wind9.3 mph NW
Humidity38%
Visibility—
Dew point35°
Sat, 3163° / 48°0
63 °
Banner, Saturday, 31 October
Overcast. High 63°, low 48°.
Pressure29.97 inHg
Wind8.6 mph S
Humidity42%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0157° / 42°0.17
57 °
Banner, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.17 in
Chance of precipitation30%
Record high77° (2016)
Record low22° (2019)
Mon, 0255° / 41°0.08
55 °
Banner, Monday, 2 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.08 in
Chance of precipitation28%
Record high75° (1961)
Record low23° (1991)
Tue, 0355° / 40°0.08
55 °
Banner, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.08 in
Chance of precipitation23%
Record high74° (1964)
Record low17° (1991)
Wed, 0454° / 41°0.09
54 °
Banner, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.09 in
Chance of precipitation22%
Record high74° (1978)
Record low16° (1991)
Thu, 0553° / 39°0.13
53 °
Banner, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.13 in
Chance of precipitation25%
Record high74° (1978)
Record low19° (1991)
Fri, 0653° / 38°0.09
53 °
Banner, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.09 in
Chance of precipitation28%
Record high71° (2020)
Record low23° (1991)
Sat, 0753° / 38°0.03
53 °
Banner, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.03 in
Chance of precipitation18%
Record high70° (1966)
Record low16° (1991)
Sun, 0853° / 38°0.05
53 °
Banner, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.05 in
Chance of precipitation22%
Record high76° (1999)
Record low13° (1991)
Mon, 0954° / 39°0.14
54 °
Banner, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.14 in
Chance of precipitation35%
Record high73° (1999)
Record low16° (1991)
Tue, 1051° / 37°0.15
51 °
Banner, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.15 in
Chance of precipitation30%
Record high73° (2020)
Record low16° (2018)
Wed, 1149° / 35°0.07
49 °
Banner, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation28%
Record high73° (1964)
Record low17° (2019)
Thu, 1248° / 34°0.07
48 °
Banner, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.07 in
Chance of precipitation25%
Record high69° (2010)
Record low8° (2019)
Fri, 1349° / 34°0.06
49 °
Banner, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation13%
Record high73° (1999)
Record low7° (1986)
Sat, 1450° / 35°0.07
50 °
Banner, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.07 in
Chance of precipitation30%
Record high72° (2025)
Record low13° (1986)
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 Banner, 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 Banner, 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.