Monthly outlook for Peoria, IL: average high 63.1°, average low 47.7°. That is 3.4° above the climate normal for October. Precipitation is expected on 5 days (about 1.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 22 October (75.8°), the coolest 3 November (39.6°).
63.1°/47.7°
Average high / low
+3.4°
Above normal
5 / 5
Wet days / normal
1.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
67.9°
58.5°
+5.2°
1 November – 10 November
55.1°
53.8°
+0.7°
11 November – 20 November
at normal
48.8°
—
October records over 66 years
89.1°3 October 2025All-time high
21°22 October 1976All-time low
Fri, 2374° / 46°0
74 °
Peoria, Friday, 23 October
Clear. High 74°, low 46°.
Pressure30.30 inHg
Wind6.3 mph S
Humidity52%
Visibility6.2 mi
Dew point50°
Sat, 2470° / 50°0
70 °
Peoria, Saturday, 24 October
Overcast. High 70°, low 50°.
Pressure30.36 inHg
Wind6.4 mph S
Humidity56%
Visibility6.2 mi
Dew point50°
Sun, 2572° / 50°0
72 °
Peoria, Sunday, 25 October
Partly cloudy. High 72°, low 50°.
Pressure30.39 inHg
Wind5.1 mph S
Humidity54%
Visibility6.2 mi
Dew point51°
Mon, 2671° / 51°0
71 °
Peoria, Monday, 26 October
Overcast. High 71°, low 51°.
Pressure30.36 inHg
Wind8.7 mph E
Humidity51%
Visibility—
Dew point49°
Tue, 2768° / 51°0.06
68 °
Peoria, Tuesday, 27 October
Light rain. High 68°, low 51°.
Pressure30.27 inHg
Wind7.7 mph NE
Humidity59%
Visibility—
Dew point51°
Wed, 2861° / 50°0.01
61 °
Peoria, Wednesday, 28 October
Light rain. High 61°, low 50°.
Pressure30.15 inHg
Wind9.1 mph W
Humidity63%
Visibility—
Dew point47°
Thu, 2965° / 49°0.33
65 °
Peoria, Thursday, 29 October
Rain. High 65°, low 49°.
Pressure30.12 inHg
Wind9.4 mph E
Humidity54%
Visibility—
Dew point46°
Fri, 3063° / 55°0.59
63 °
Peoria, Friday, 30 October
Rain. High 63°, low 55°.
Pressure29.83 inHg
Wind16.1 mph S
Humidity77%
Visibility—
Dew point55°
Sat, 3160° / 52°0.75
60 °
Peoria, Saturday, 31 October
Rain. High 60°, low 52°.
Pressure29.74 inHg
Wind13.7 mph S
Humidity97%
Visibility—
Dew point58°
Sun, 0163° / 48°0
63 °
Peoria, Sunday, 1 November
Partly cloudy. High 63°, low 48°.
Pressure29.94 inHg
Wind7.5 mph NW
Humidity51%
Visibility—
Dew point42°
Mon, 0256° / 45°0
56 °
Peoria, Monday, 2 November
Overcast. High 56°, low 45°.
Pressure30.18 inHg
Wind15.5 mph NE
Humidity52%
Visibility—
Dew point37°
Tue, 0356° / 40°0
56 °
Peoria, Tuesday, 3 November
Overcast. High 56°, low 40°.
Pressure30.36 inHg
Wind12.1 mph NE
Humidity46%
Visibility—
Dew point33°
Wed, 0453° / 41°0
53 °
Peoria, Wednesday, 4 November
Overcast. High 53°, low 41°.
Pressure30.39 inHg
Wind17.8 mph NE
Humidity48%
Visibility—
Dew point32°
Thu, 0547° / 43°0.2
47 °
Peoria, Thursday, 5 November
Light rain. High 47°, low 43°.
Pressure30.27 inHg
Wind14.2 mph NE
Humidity63%
Visibility—
Dew point33°
Fri, 0656° / 46°0
56 °
Peoria, Friday, 6 November
Light rain. High 56°, low 46°.
Pressure30.21 inHg
Wind6.2 mph NE
Humidity71%
Visibility—
Dew point44°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 0753° / 38°0.04
53 °
Peoria, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.04 in
Chance of precipitation17%
Record high69° (1966)
Record low15° (1991)
Sun, 0853° / 38°0.05
53 °
Peoria, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.05 in
Chance of precipitation20%
Record high75° (1999)
Record low12° (1991)
Mon, 0954° / 39°0.14
54 °
Peoria, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.14 in
Chance of precipitation35%
Record high74° (2020)
Record low16° (1991)
Tue, 1051° / 37°0.15
51 °
Peoria, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.15 in
Chance of precipitation32%
Record high73° (2020)
Record low17° (2018)
Wed, 1149° / 35°0.07
49 °
Peoria, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation27%
Record high73° (1964)
Record low17° (2019)
Thu, 1248° / 33°0.07
48 °
Peoria, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.07 in
Chance of precipitation25%
Record high70° (2010)
Record low9° (2019)
Fri, 1349° / 34°0.06
49 °
Peoria, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation15%
Record high72° (1999)
Record low7° (1986)
Sat, 1449° / 35°0.07
49 °
Peoria, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation28%
Record high72° (1971)
Record low14° (1986)
Sun, 1549° / 35°0.07
49 °
Peoria, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation30%
Record high70° (2025)
Record low18° (2014)
Mon, 1649° / 35°0.06
49 °
Peoria, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.06 in
Chance of precipitation23%
Record high69° (1971)
Record low21° (1997)
Tue, 1750° / 35°0.12
50 °
Peoria, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.12 in
Chance of precipitation30%
Record high73° (2016)
Record low16° (2005)
Wed, 1849° / 36°0.14
49 °
Peoria, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.14 in
Chance of precipitation33%
Record high69° (1999)
Record low12° (2014)
Thu, 1949° / 35°0.07
49 °
Peoria, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation28%
Record high68° (1979)
Record low19° (2014)
Fri, 2047° / 34°0.1
47 °
Peoria, Friday, 20 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.1 in
Chance of precipitation32%
Record high67° (2007)
Record low17° (2022)
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 Peoria, 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 Peoria, 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.