Monthly outlook for Garden Plain, IL: average high 58.8°, average low 43.8°. That is 0° below the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 23 October (71.4°), the coolest 30 October (30.5°).
58.8°/43.8°
Average high / low
−0°
Below normal
2 / 4
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
64.1°
60.2°
+2.2°
25 October – 3 November
50.1°
55.9°
-3.2°
4 November – 13 November
at normal
50.4°
—
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, 1656° / 45°0.02
56 °
Garden Plain, Friday, 16 October
Light rain. High 56°, low 45°.
Pressure30.15 inHg
Wind16.5 mph NW
Humidity69%
Visibility6.2 mi
Dew point43°
Sat, 1756° / 38°0
56 °
Garden Plain, Saturday, 17 October
Clear. High 56°, low 38°.
Pressure30.56 inHg
Wind6.6 mph SW
Humidity47%
Visibility6.2 mi
Dew point33°
Sun, 1861° / 42°0
61 °
Garden Plain, Sunday, 18 October
Clear. High 61°, low 42°.
Pressure30.42 inHg
Wind12.5 mph SW
Humidity48%
Visibility6.2 mi
Dew point38°
Mon, 1964° / 43°0
64 °
Garden Plain, Monday, 19 October
Overcast. High 64°, low 43°.
Pressure30.36 inHg
Wind7.4 mph S
Humidity52%
Visibility—
Dew point42°
Tue, 2065° / 45°0
65 °
Garden Plain, Tuesday, 20 October
Mostly clear. High 65°, low 45°.
Pressure30.30 inHg
Wind6.2 mph E
Humidity47%
Visibility—
Dew point41°
Wed, 2168° / 50°0
68 °
Garden Plain, Wednesday, 21 October
Clear. High 68°, low 50°.
Pressure30.33 inHg
Wind8.4 mph SE
Humidity42%
Visibility—
Dew point41°
Thu, 2266° / 52°0
66 °
Garden Plain, Thursday, 22 October
Overcast. High 66°, low 52°.
Pressure30.27 inHg
Wind8 mph SE
Humidity47%
Visibility—
Dew point44°
Fri, 2371° / 54°0
71 °
Garden Plain, Friday, 23 October
Overcast. High 71°, low 54°.
Pressure30.09 inHg
Wind15.9 mph S
Humidity43%
Visibility—
Dew point44°
Sat, 2465° / 57°0.04
65 °
Garden Plain, Saturday, 24 October
Light rain. High 65°, low 57°.
Pressure30.06 inHg
Wind15.4 mph S
Humidity67%
Visibility—
Dew point53°
Sun, 2556° / 43°0.21
56 °
Garden Plain, Sunday, 25 October
Rain. High 56°, low 43°.
Pressure30.18 inHg
Wind15.2 mph W
Humidity49%
Visibility—
Dew point33°
Mon, 2650° / 36°0
50 °
Garden Plain, Monday, 26 October
Mostly clear. High 50°, low 36°.
Pressure30.33 inHg
Wind12.4 mph W
Humidity38%
Visibility—
Dew point23°
Tue, 2746° / 35°0
46 °
Garden Plain, Tuesday, 27 October
Partly cloudy. High 46°, low 35°.
Pressure30.30 inHg
Wind11.9 mph NW
Humidity34%
Visibility—
Dew point17°
Wed, 2858° / 35°0.01
58 °
Garden Plain, Wednesday, 28 October
Light rain. High 58°, low 35°.
Pressure30.03 inHg
Wind15.5 mph SW
Humidity52%
Visibility—
Dew point35°
Thu, 2949° / 42°0
49 °
Garden Plain, Thursday, 29 October
Overcast. High 49°, low 42°.
Pressure30.12 inHg
Wind10 mph N
Humidity51%
Visibility—
Dew point29°
Fri, 3042° / 31°0
42 °
Garden Plain, Friday, 30 October
Clear. High 42°, low 31°.
Pressure30.53 inHg
Wind15.9 mph N
Humidity38%
Visibility—
Dew point15°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3156° / 42°0.13
56 °
Garden Plain, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.13 in
Chance of precipitation35%
Record high73° (1968)
Record low21° (2019)
Sun, 0155° / 41°0.17
55 °
Garden Plain, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.17 in
Chance of precipitation37%
Record high76° (2000)
Record low20° (2019)
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)
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.