Monthly outlook for Shamrock, IL: average high 64.9°, average low 50.3°. That is 4.7° above the climate normal for October. Precipitation is expected on 5 days (about 0.9 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 30 October (76.2°), the coolest 2 November (39.3°).
64.9°/50.3°
Average high / low
+4.7°
Above normal
5 / 4
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
70°
57.9°
+6.7°
3 November – 12 November
56.4°
52.8°
+2°
13 November – 22 November
at normal
48.7°
—
October records over 66 years
88.3°7 October 2007All-time high
19.9°22 October 1976All-time low
Climate normals and records are computed from the nearest reference point — Bloomington (5 mi).
Sun, 2573° / 50°0
73 °
Shamrock, Sunday, 25 October
Overcast. High 73°, low 50°.
Pressure30.42 inHg
Wind5.1 mph S
Humidity51%
Visibility6.2 mi
Dew point49°
Mon, 2670° / 50°0
70 °
Shamrock, Monday, 26 October
Overcast. High 70°, low 50°.
Pressure30.33 inHg
Wind1.8 mph S
Humidity53%
Visibility6.2 mi
Dew point51°
Tue, 2770° / 53°0
70 °
Shamrock, Tuesday, 27 October
Overcast. High 70°, low 53°.
Pressure30.24 inHg
Wind7.4 mph S
Humidity54%
Visibility6.2 mi
Dew point51°
Wed, 2873° / 54°0
73 °
Shamrock, Wednesday, 28 October
Clear. High 73°, low 54°.
Pressure30.18 inHg
Wind10 mph S
Humidity57%
Visibility6.2 mi
Dew point52°
Thu, 2972° / 57°0.02
72 °
Shamrock, Thursday, 29 October
Light rain. High 72°, low 57°.
Pressure30.18 inHg
Wind10.5 mph S
Humidity60%
Visibility—
Dew point54°
Fri, 3076° / 56°0.05
76 °
Shamrock, Friday, 30 October
Light rain. High 76°, low 56°.
Pressure30.15 inHg
Wind9.1 mph S
Humidity45%
Visibility—
Dew point50°
Sat, 3170° / 61°0.05
70 °
Shamrock, Saturday, 31 October
Light rain. High 70°, low 61°.
Pressure30.03 inHg
Wind17.6 mph S
Humidity38%
Visibility—
Dew point42°
Sun, 0171° / 60°0.33
71 °
Shamrock, Sunday, 1 November
Rain. High 71°, low 60°.
Pressure29.71 inHg
Wind20.7 mph S
Humidity60%
Visibility—
Dew point55°
Mon, 0252° / 39°0.22
52 °
Shamrock, Monday, 2 November
Light rain. High 52°, low 39°.
Pressure29.59 inHg
Wind19.6 mph W
Humidity94%
Visibility—
Dew point38°
Tue, 0352° / 50°0.23
52 °
Shamrock, Tuesday, 3 November
Light rain. High 52°, low 50°.
Pressure29.56 inHg
Wind22.4 mph NW
Humidity87%
Visibility—
Dew point48°
Wed, 0453° / 47°0.04
53 °
Shamrock, Wednesday, 4 November
Light rain. High 53°, low 47°.
Pressure29.71 inHg
Wind14 mph NW
Humidity72%
Visibility—
Dew point42°
Thu, 0551° / 47°0
51 °
Shamrock, Thursday, 5 November
Overcast. High 51°, low 47°.
Pressure30.03 inHg
Wind5.2 mph NE
Humidity72%
Visibility—
Dew point41°
Fri, 0657° / 44°0
57 °
Shamrock, Friday, 6 November
Overcast. High 57°, low 44°.
Pressure30.18 inHg
Wind5.1 mph NE
Humidity52%
Visibility—
Dew point36°
Sat, 0760° / 44°0
60 °
Shamrock, Saturday, 7 November
Clear. High 60°, low 44°.
Pressure30.27 inHg
Wind5.8 mph N
Humidity51%
Visibility—
Dew point38°
Sun, 0865° / 46°0
65 °
Shamrock, Sunday, 8 November
Clear. High 65°, low 46°.
Pressure30.15 inHg
Wind11.9 mph SW
Humidity46%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0954° / 39°0.14
54 °
Shamrock, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.14 in
Chance of precipitation33%
Record high72° (2020)
Record low15° (1991)
Tue, 1052° / 38°0.16
52 °
Shamrock, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.16 in
Chance of precipitation30%
Record high71° (2020)
Record low17° (2018)
Wed, 1150° / 35°0.07
50 °
Shamrock, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.07 in
Chance of precipitation28%
Record high73° (1964)
Record low17° (2019)
Thu, 1248° / 34°0.07
48 °
Shamrock, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.07 in
Chance of precipitation23%
Record high71° (2010)
Record low9° (2019)
Fri, 1349° / 34°0.06
49 °
Shamrock, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation20%
Record high71° (1999)
Record low7° (1986)
Sat, 1450° / 35°0.07
50 °
Shamrock, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.07 in
Chance of precipitation35%
Record high73° (1971)
Record low13° (1986)
Sun, 1549° / 36°0.09
49 °
Shamrock, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.09 in
Chance of precipitation28%
Record high70° (2025)
Record low18° (2014)
Mon, 1649° / 35°0.07
49 °
Shamrock, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation18%
Record high70° (1971)
Record low21° (1997)
Tue, 1750° / 35°0.11
50 °
Shamrock, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.11 in
Chance of precipitation28%
Record high72° (2016)
Record low15° (2005)
Wed, 1850° / 36°0.17
50 °
Shamrock, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.17 in
Chance of precipitation33%
Record high69° (1999)
Record low11° (2014)
Thu, 1949° / 35°0.08
49 °
Shamrock, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.08 in
Chance of precipitation28%
Record high68° (1979)
Record low18° (2014)
Fri, 2048° / 34°0.11
48 °
Shamrock, Friday, 20 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.11 in
Chance of precipitation33%
Record high67° (2007)
Record low16° (2022)
Sat, 2146° / 33°0.1
46 °
Shamrock, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.1 in
Chance of precipitation30%
Record high69° (1990)
Record low9° (1964)
Sun, 2247° / 32°0.06
47 °
Shamrock, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.06 in
Chance of precipitation27%
Record high71° (2010)
Record low6° (2015)
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 Shamrock, 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 Shamrock, 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.