Monthly outlook for Banner, IL: average high 71.2°, average low 55.2°. That is 5.6° above the climate normal for October. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 12 October (89.3°), the coolest 17 October (40.5°).
71.2°/55.2°
Average high / low
+5.6°
Above normal
5 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
71.5°
62.4°
+5°
22 October – 31 October
70.8°
58.6°
+6.8°
1 November – 10 November
at normal
53.9°
—
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).
Tue, 1385° / 65°0.02
85 °
Banner, Tuesday, 13 October
Light rain. High 85°, low 65°.
Pressure29.88 inHg
Wind5.8 mph W
Humidity62%
Visibility6.2 mi
Dew point65°
Wed, 1474° / 64°0.28
74 °
Banner, Wednesday, 14 October
Rain. High 74°, low 64°.
Pressure30.06 inHg
Wind4.6 mph NE
Humidity69%
Visibility6.2 mi
Dew point63°
Thu, 1566° / 60°0.72
66 °
Banner, Thursday, 15 October
Heavy rain. High 66°, low 60°.
Pressure30.03 inHg
Wind5.1 mph NE
Humidity97%
Visibility2.6 mi
Dew point63°
Fri, 1659° / 48°0
59 °
Banner, Friday, 16 October
Partly cloudy. High 59°, low 48°.
Pressure30.39 inHg
Wind17.5 mph N
Humidity50%
Visibility6.2 mi
Dew point37°
Sat, 1760° / 40°0
60 °
Banner, Saturday, 17 October
Clear. High 60°, low 40°.
Pressure30.50 inHg
Wind6.6 mph N
Humidity41%
Visibility—
Dew point33°
Sun, 1865° / 41°0
65 °
Banner, Sunday, 18 October
Clear. High 65°, low 41°.
Pressure30.27 inHg
Wind14.6 mph S
Humidity30%
Visibility—
Dew point28°
Mon, 1963° / 49°0.07
63 °
Banner, Monday, 19 October
Light rain. High 63°, low 49°.
Pressure30.18 inHg
Wind11 mph S
Humidity48%
Visibility—
Dew point41°
Tue, 2074° / 55°0.05
74 °
Banner, Tuesday, 20 October
Light rain. High 74°, low 55°.
Pressure30.18 inHg
Wind7.5 mph E
Humidity51%
Visibility—
Dew point50°
Wed, 2179° / 59°0
79 °
Banner, Wednesday, 21 October
Clear. High 79°, low 59°.
Pressure30.24 inHg
Wind10.2 mph SE
Humidity56%
Visibility—
Dew point58°
Thu, 2279° / 63°0
79 °
Banner, Thursday, 22 October
Overcast. High 79°, low 63°.
Pressure30.27 inHg
Wind13.7 mph S
Humidity48%
Visibility—
Dew point55°
Fri, 2379° / 69°0
79 °
Banner, Friday, 23 October
Light rain. High 79°, low 69°.
Pressure30.24 inHg
Wind12.6 mph S
Humidity50%
Visibility—
Dew point55°
Sat, 2479° / 65°0.74
79 °
Banner, Saturday, 24 October
Rain. High 79°, low 65°.
Pressure29.94 inHg
Wind20.1 mph S
Humidity52%
Visibility—
Dew point58°
Sun, 2565° / 52°0
65 °
Banner, Sunday, 25 October
Overcast. High 65°, low 52°.
Pressure30.03 inHg
Wind18.9 mph W
Humidity65%
Visibility—
Dew point44°
Mon, 2658° / 42°0
58 °
Banner, Monday, 26 October
Clear. High 58°, low 42°.
Pressure30.21 inHg
Wind13.2 mph NW
Humidity42%
Visibility—
Dew point31°
Tue, 2764° / 48°0
64 °
Banner, Tuesday, 27 October
Clear. High 64°, low 48°.
Pressure29.85 inHg
Wind17.9 mph N
Humidity52%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2857° / 42°0.04
57 °
Banner, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.04 in
Chance of precipitation22%
Record high74° (1999)
Record low25° (1976)
Thu, 2958° / 42°0.08
58 °
Banner, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high58°
Average low42°
Average precipitation0.08 in
Chance of precipitation23%
Record high78° (2024)
Record low23° (1980)
Fri, 3059° / 43°0.12
59 °
Banner, Friday, 30 October
Climate normal for this date — 60-year average.
Average high59°
Average low43°
Average precipitation0.12 in
Chance of precipitation32%
Record high78° (1971)
Record low26° (1980)
Sat, 3158° / 43°0.16
58 °
Banner, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high58°
Average low43°
Average precipitation0.16 in
Chance of precipitation38%
Record high75° (1968)
Record low22° (2019)
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)
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.