Monthly outlook for Garden Plain, IL: average high 59.3°, average low 44.1°. That is 1.9° above the climate normal for October. Precipitation is expected on 5 days (about 1.7 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (75°), the coolest 6 November (31.9°).
59.3°/44.1°
Average high / low
+1.9°
Above normal
5 / 5
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
63.8°
57.4°
+3.6°
1 November – 10 November
51.8°
52.4°
-0.4°
11 November – 20 November
at normal
47.4°
—
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).
Fri, 2373° / 49°0
73 °
Garden Plain, Friday, 23 October
Clear. High 73°, low 49°.
Pressure30.30 inHg
Wind6.6 mph S
Humidity56%
Visibility6.2 mi
Dew point51°
Sat, 2469° / 53°0
69 °
Garden Plain, Saturday, 24 October
Overcast. High 69°, low 53°.
Pressure30.33 inHg
Wind8.8 mph S
Humidity58%
Visibility6.2 mi
Dew point51°
Sun, 2571° / 51°0
71 °
Garden Plain, Sunday, 25 October
Partly cloudy. High 71°, low 51°.
Pressure30.36 inHg
Wind4 mph S
Humidity59%
Visibility6.2 mi
Dew point51°
Mon, 2670° / 52°0
70 °
Garden Plain, Monday, 26 October
Overcast. High 70°, low 52°.
Pressure30.30 inHg
Wind6 mph E
Humidity56%
Visibility—
Dew point51°
Tue, 2757° / 52°0.21
57 °
Garden Plain, Tuesday, 27 October
Light rain. High 57°, low 52°.
Pressure30.18 inHg
Wind6.9 mph SE
Humidity79%
Visibility—
Dew point50°
Wed, 2849° / 39°0.04
49 °
Garden Plain, Wednesday, 28 October
Light rain. High 49°, low 39°.
Pressure30.33 inHg
Wind16 mph N
Humidity66%
Visibility—
Dew point34°
Thu, 2953° / 35°0
53 °
Garden Plain, Thursday, 29 October
Clear. High 53°, low 35°.
Pressure30.33 inHg
Wind6.5 mph S
Humidity45%
Visibility—
Dew point28°
Fri, 3058° / 39°0
58 °
Garden Plain, Friday, 30 October
Overcast. High 58°, low 39°.
Pressure30.12 inHg
Wind16.5 mph S
Humidity43%
Visibility—
Dew point32°
Sat, 3162° / 51°0.09
62 °
Garden Plain, Saturday, 31 October
Light rain. High 62°, low 51°.
Pressure29.94 inHg
Wind15.9 mph S
Humidity54%
Visibility—
Dew point41°
Sun, 0155° / 53°1.22
55 °
Garden Plain, Sunday, 1 November
Rain. High 55°, low 53°.
Pressure29.88 inHg
Wind18.9 mph S
Humidity95%
Visibility—
Dew point52°
Mon, 0252° / 39°0.09
52 °
Garden Plain, Monday, 2 November
Light rain. High 52°, low 39°.
Pressure30.21 inHg
Wind18.8 mph NW
Humidity49%
Visibility—
Dew point30°
Tue, 0351° / 35°0
51 °
Garden Plain, Tuesday, 3 November
Overcast. High 51°, low 35°.
Pressure30.30 inHg
Wind11.4 mph W
Humidity42%
Visibility—
Dew point26°
Wed, 0456° / 40°0
56 °
Garden Plain, Wednesday, 4 November
Overcast. High 56°, low 40°.
Pressure29.71 inHg
Wind20.3 mph SW
Humidity68%
Visibility—
Dew point43°
Thu, 0557° / 37°0
57 °
Garden Plain, Thursday, 5 November
Overcast. High 57°, low 37°.
Pressure29.77 inHg
Wind24.7 mph NW
Humidity53%
Visibility—
Dew point31°
Fri, 0640° / 32°0
40 °
Garden Plain, Friday, 6 November
Overcast. High 40°, low 32°.
Pressure30.03 inHg
Wind6.2 mph S
Humidity61%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Thu, 1948° / 33°0.06
48 °
Garden Plain, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation27%
Record high66° (1979)
Record low16° (2022)
Fri, 2046° / 32°0.1
46 °
Garden Plain, Friday, 20 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.1 in
Chance of precipitation32%
Record high65° (2003)
Record low16° (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 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.