Monthly outlook for Garden Plain, IL: average high 63.7°, average low 46.3°. That is 3° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 24 October (72.2°), the coolest 17 October (34.5°).
63.7°/46.3°
Average high / low
+3°
Above normal
1 / 5
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
17 October – 26 October
63.5°
59.4°
+2.3°
27 October – 5 November
63.9°
55°
+5°
6 November – 15 November
at normal
49.4°
—
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).
Sun, 1862° / 42°0
62 °
Garden Plain, Sunday, 18 October
Clear. High 62°, low 42°.
Pressure30.39 inHg
Wind11.8 mph S
Humidity53%
Visibility6.2 mi
Dew point41°
Mon, 1964° / 43°0
64 °
Garden Plain, Monday, 19 October
Partly cloudy. High 64°, low 43°.
Pressure30.39 inHg
Wind4 mph S
Humidity60%
Visibility6.2 mi
Dew point46°
Tue, 2065° / 44°0
65 °
Garden Plain, Tuesday, 20 October
Mostly clear. High 65°, low 44°.
Pressure30.39 inHg
Wind4.1 mph SE
Humidity55%
Visibility6.2 mi
Dew point46°
Wed, 2167° / 44°0
67 °
Garden Plain, Wednesday, 21 October
Clear. High 67°, low 44°.
Pressure30.27 inHg
Wind4 mph S
Humidity61%
Visibility6.2 mi
Dew point48°
Thu, 2268° / 49°0
68 °
Garden Plain, Thursday, 22 October
Clear. High 68°, low 49°.
Pressure30.27 inHg
Wind6.1 mph E
Humidity55%
Visibility—
Dew point48°
Fri, 2369° / 51°0
69 °
Garden Plain, Friday, 23 October
Overcast. High 69°, low 51°.
Pressure30.30 inHg
Wind10.9 mph SE
Humidity52%
Visibility—
Dew point46°
Sat, 2472° / 57°0
72 °
Garden Plain, Saturday, 24 October
Overcast. High 72°, low 57°.
Pressure30.15 inHg
Wind16.5 mph S
Humidity38%
Visibility—
Dew point43°
Sun, 2556° / 42°0
56 °
Garden Plain, Sunday, 25 October
Overcast. High 56°, low 42°.
Pressure30.42 inHg
Wind13.4 mph NW
Humidity53%
Visibility—
Dew point34°
Mon, 2655° / 36°0
55 °
Garden Plain, Monday, 26 October
Clear. High 55°, low 36°.
Pressure30.42 inHg
Wind6.8 mph W
Humidity35%
Visibility—
Dew point24°
Tue, 2758° / 38°0
58 °
Garden Plain, Tuesday, 27 October
Overcast. High 58°, low 38°.
Pressure30.30 inHg
Wind10.8 mph S
Humidity40%
Visibility—
Dew point29°
Wed, 2866° / 50°0.01
66 °
Garden Plain, Wednesday, 28 October
Light rain. High 66°, low 50°.
Pressure30.00 inHg
Wind18.4 mph S
Humidity58%
Visibility—
Dew point46°
Thu, 2966° / 60°0.15
66 °
Garden Plain, Thursday, 29 October
Light rain. High 66°, low 60°.
Pressure29.74 inHg
Wind20 mph S
Humidity74%
Visibility—
Dew point54°
Fri, 3065° / 49°0
65 °
Garden Plain, Friday, 30 October
Clear. High 65°, low 49°.
Pressure29.94 inHg
Wind7.4 mph NW
Humidity26%
Visibility—
Dew point26°
Sat, 3166° / 50°0
66 °
Garden Plain, Saturday, 31 October
Overcast. High 66°, low 50°.
Pressure29.97 inHg
Wind16.4 mph SE
Humidity68%
Visibility—
Dew point53°
Sun, 0162° / 52°0
62 °
Garden Plain, Sunday, 1 November
Clear. High 62°, low 52°.
Pressure29.85 inHg
Wind18.3 mph W
Humidity41%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0254° / 40°0.09
54 °
Garden Plain, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.09 in
Chance of precipitation33%
Record high73° (1961)
Record low19° (1991)
Tue, 0353° / 39°0.06
53 °
Garden Plain, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.06 in
Chance of precipitation22%
Record high73° (1964)
Record low15° (1991)
Wed, 0453° / 40°0.09
53 °
Garden Plain, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.09 in
Chance of precipitation20%
Record high71° (2022)
Record low14° (1991)
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)
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.