Monthly outlook for Garden Plain, IL: average high 58.5°, average low 41.9°. That is 0.8° 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 21 October (73.1°), the coolest 28 October (28.9°).
58.5°/41.9°
Average high / low
+0.8°
Above normal
3 / 5
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
61.4°
58.2°
+1.7°
30 October – 8 November
53.6°
53.7°
-0°
9 November – 18 November
at normal
48.2°
—
October records over 66 years
88.2°3 October 2025All-time high
17.8°28 October 1967All-time low
Climate normals and records are computed from the nearest reference point — Princeton (15 mi).
Wed, 2173° / 44°0
73 °
Garden Plain, Wednesday, 21 October
Clear. High 73°, low 44°.
Pressure30.27 inHg
Wind3.9 mph SW
Humidity59%
Visibility6.2 mi
Dew point50°
Thu, 2269° / 49°0
69 °
Garden Plain, Thursday, 22 October
Clear. High 69°, low 49°.
Pressure30.30 inHg
Wind3.2 mph SE
Humidity61%
Visibility6.2 mi
Dew point53°
Fri, 2369° / 50°0
69 °
Garden Plain, Friday, 23 October
Clear. High 69°, low 50°.
Pressure30.33 inHg
Wind7.5 mph SE
Humidity65%
Visibility6.2 mi
Dew point53°
Sat, 2470° / 52°0
70 °
Garden Plain, Saturday, 24 October
Mostly clear. High 70°, low 52°.
Pressure30.30 inHg
Wind9.8 mph S
Humidity61%
Visibility6.2 mi
Dew point51°
Sun, 2568° / 54°0
68 °
Garden Plain, Sunday, 25 October
Overcast. High 68°, low 54°.
Pressure30.36 inHg
Wind6.7 mph S
Humidity66%
Visibility—
Dew point53°
Mon, 2656° / 39°0.22
56 °
Garden Plain, Monday, 26 October
Light rain. High 56°, low 39°.
Pressure30.09 inHg
Wind15 mph N
Humidity69%
Visibility—
Dew point46°
Tue, 2746° / 35°0
46 °
Garden Plain, Tuesday, 27 October
Clear. High 46°, low 35°.
Pressure30.45 inHg
Wind13.6 mph NW
Humidity40%
Visibility—
Dew point22°
Wed, 2847° / 29°0
47 °
Garden Plain, Wednesday, 28 October
Clear. High 47°, low 29°.
Pressure30.39 inHg
Wind12.8 mph SW
Humidity40%
Visibility—
Dew point20°
Thu, 2948° / 36°0
48 °
Garden Plain, Thursday, 29 October
Clear. High 48°, low 36°.
Pressure30.12 inHg
Wind14.1 mph NW
Humidity47%
Visibility—
Dew point27°
Fri, 3044° / 32°0
44 °
Garden Plain, Friday, 30 October
Clear. High 44°, low 32°.
Pressure30.45 inHg
Wind14.5 mph N
Humidity44%
Visibility—
Dew point20°
Sat, 3148° / 30°0
48 °
Garden Plain, Saturday, 31 October
Overcast. High 48°, low 30°.
Pressure30.24 inHg
Wind13.3 mph SW
Humidity42%
Visibility—
Dew point23°
Sun, 0154° / 42°0
54 °
Garden Plain, Sunday, 1 November
Overcast. High 54°, low 42°.
Pressure30.12 inHg
Wind9.6 mph SW
Humidity77%
Visibility—
Dew point42°
Mon, 0260° / 40°0
60 °
Garden Plain, Monday, 2 November
Clear. High 60°, low 40°.
Pressure30.27 inHg
Wind9.6 mph S
Humidity61%
Visibility—
Dew point42°
Tue, 0359° / 47°0.43
59 °
Garden Plain, Tuesday, 3 November
Rain. High 59°, low 47°.
Pressure30.12 inHg
Wind16 mph S
Humidity55%
Visibility—
Dew point41°
Wed, 0458° / 51°0.85
58 °
Garden Plain, Wednesday, 4 November
Rain. High 58°, low 51°.
Pressure29.91 inHg
Wind13.2 mph S
Humidity95%
Visibility—
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0552° / 38°0.1
52 °
Garden Plain, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.1 in
Chance of precipitation25%
Record high72° (1978)
Record low19° (1991)
Fri, 0652° / 38°0.08
52 °
Garden Plain, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.08 in
Chance of precipitation28%
Record high71° (2020)
Record low21° (1991)
Sat, 0752° / 37°0.02
52 °
Garden Plain, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.02 in
Chance of precipitation15%
Record high69° (1966)
Record low13° (1991)
Sun, 0852° / 37°0.04
52 °
Garden Plain, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.04 in
Chance of precipitation15%
Record high75° (1999)
Record low12° (1991)
Mon, 0951° / 37°0.11
51 °
Garden Plain, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.11 in
Chance of precipitation33%
Record high74° (1999)
Record low17° (1991)
Tue, 1050° / 35°0.1
50 °
Garden Plain, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.1 in
Chance of precipitation28%
Record high73° (2022)
Record low15° (2018)
Wed, 1148° / 33°0.07
48 °
Garden Plain, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.07 in
Chance of precipitation22%
Record high72° (1964)
Record low15° (2019)
Thu, 1246° / 32°0.06
46 °
Garden Plain, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.06 in
Chance of precipitation25%
Record high66° (1964)
Record low7° (2019)
Fri, 1347° / 32°0.05
47 °
Garden Plain, Friday, 13 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.05 in
Chance of precipitation25%
Record high72° (1999)
Record low6° (1986)
Sat, 1448° / 33°0.06
48 °
Garden Plain, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation28%
Record high70° (2025)
Record low14° (1986)
Sun, 1547° / 34°0.07
47 °
Garden Plain, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.07 in
Chance of precipitation28%
Record high69° (2025)
Record low18° (1982)
Mon, 1648° / 33°0.06
48 °
Garden Plain, Monday, 16 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation25%
Record high66° (1971)
Record low17° (1997)
Tue, 1748° / 34°0.13
48 °
Garden Plain, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.13 in
Chance of precipitation25%
Record high73° (2016)
Record low14° (2005)
Wed, 1848° / 34°0.07
48 °
Garden Plain, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.07 in
Chance of precipitation30%
Record high70° (1999)
Record low11° (2014)
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 Garden Plain, 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 Garden Plain, 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.