Monthly outlook for Garden Plain, IL: average high 63.2°, average low 50.1°. That is 3.8° above the climate normal for October. Precipitation is expected on 8 days (about 4.0 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (74.1°), the coolest 30 October (40.8°).
63.2°/50.1°
Average high / low
+3.8°
Above normal
8 / 5
Wet days / normal
4.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
66.8°
57.9°
+5°
31 October – 9 November
57.1°
53°
+2.2°
10 November – 19 November
at normal
47.8°
—
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).
Thu, 2274° / 48°0
74 °
Garden Plain, Thursday, 22 October
Partly cloudy. High 74°, low 48°.
Pressure30.27 inHg
Wind2.3 mph SE
Humidity64%
Visibility6.2 mi
Dew point55°
Fri, 2370° / 55°0
70 °
Garden Plain, Friday, 23 October
Overcast. High 70°, low 55°.
Pressure30.30 inHg
Wind6.3 mph SE
Humidity63%
Visibility6.2 mi
Dew point54°
Sat, 2469° / 52°0
69 °
Garden Plain, Saturday, 24 October
Overcast. High 69°, low 52°.
Pressure30.33 inHg
Wind8.6 mph S
Humidity59%
Visibility6.2 mi
Dew point50°
Sun, 2571° / 51°0
71 °
Garden Plain, Sunday, 25 October
Overcast. High 71°, low 51°.
Pressure30.33 inHg
Wind5.9 mph S
Humidity55%
Visibility—
Dew point49°
Mon, 2670° / 54°0
70 °
Garden Plain, Monday, 26 October
Overcast. High 70°, low 54°.
Pressure30.18 inHg
Wind8 mph SW
Humidity56%
Visibility—
Dew point49°
Tue, 2760° / 51°0.07
60 °
Garden Plain, Tuesday, 27 October
Light rain. High 60°, low 51°.
Pressure30.27 inHg
Wind10.8 mph E
Humidity59%
Visibility—
Dew point44°
Wed, 2867° / 54°0.02
67 °
Garden Plain, Wednesday, 28 October
Light rain. High 67°, low 54°.
Pressure30.03 inHg
Wind14.5 mph SW
Humidity59%
Visibility—
Dew point50°
Thu, 2960° / 44°0.05
60 °
Garden Plain, Thursday, 29 October
Light rain. High 60°, low 44°.
Pressure30.27 inHg
Wind12.9 mph N
Humidity46%
Visibility—
Dew point30°
Fri, 3056° / 41°0
56 °
Garden Plain, Friday, 30 October
Overcast. High 56°, low 41°.
Pressure30.27 inHg
Wind12.4 mph E
Humidity46%
Visibility—
Dew point33°
Sat, 3161° / 48°1.1
61 °
Garden Plain, Saturday, 31 October
Rain. High 61°, low 48°.
Pressure29.83 inHg
Wind19.3 mph S
Humidity87%
Visibility—
Dew point53°
Sun, 0161° / 57°0.88
61 °
Garden Plain, Sunday, 1 November
Rain. High 61°, low 57°.
Pressure29.80 inHg
Wind19.9 mph S
Humidity96%
Visibility—
Dew point57°
Mon, 0257° / 51°0.36
57 °
Garden Plain, Monday, 2 November
Light rain. High 57°, low 51°.
Pressure29.88 inHg
Wind14.7 mph N
Humidity92%
Visibility—
Dew point52°
Tue, 0352° / 51°0.46
52 °
Garden Plain, Tuesday, 3 November
Rain. High 52°, low 51°.
Pressure29.74 inHg
Wind17.6 mph N
Humidity92%
Visibility—
Dew point49°
Wed, 0459° / 52°0.7
59 °
Garden Plain, Wednesday, 4 November
Rain. High 59°, low 52°.
Pressure29.38 inHg
Wind16.4 mph N
Humidity95%
Visibility—
Dew point55°
Thu, 0553° / 48°0.34
53 °
Garden Plain, Thursday, 5 November
Rain. High 53°, low 48°.
Pressure29.47 inHg
Wind12.8 mph SW
Humidity91%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
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)
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)
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.