As of 09:00 CDT

Weather in Shamrock, IL

59°

Shamrock, Friday, 23 October, 09:00

Clear. Feels like 58°. High 73°, low 47°.

Pressure30.33 inHg

Wind1 mph NE

Humidity73%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Monthly outlook for Shamrock, IL: average high 67.6°, average low 52.1°. That is 5.9° above the climate normal for October. Precipitation is expected on 6 days (about 2.3 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 29 October (73.5°), the coolest 24 October (44.8°).

67.6°/52.1°

Average high / low

+5.9°

Above normal

6 / 5

Wet days / normal

2.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
23 October – 1 November	67.6°	58.4°	+5.1°
2 November – 11 November	67.5°	53.5°	+7.8°
12 November – 21 November	at normal	48.8°	—

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).

Sat, 2472° / 45°

72 °

Shamrock, Saturday, 24 October

Overcast. High 72°, low 45°.

Pressure30.36 inHg

Wind6 mph S

Humidity53%

Visibility6.2 mi

Dew point48°

Sun, 2572° / 47°

72 °

Shamrock, Sunday, 25 October

Overcast. High 72°, low 47°.

Pressure30.39 inHg

Wind5.1 mph S

Humidity52%

Visibility6.2 mi

Dew point50°

Mon, 2671° / 52°

71 °

Shamrock, Monday, 26 October

Overcast. High 71°, low 52°.

Pressure30.33 inHg

Wind0.4 mph SE

Humidity58%

Visibility6.2 mi

Dew point53°

Tue, 2768° / 50°

68 °

Shamrock, Tuesday, 27 October

Overcast. High 68°, low 50°.

Pressure30.24 inHg

Wind8.7 mph E

Humidity59%

Visibility—

Dew point50°

Wed, 2871° / 54°

71 °

Shamrock, Wednesday, 28 October

Clear. High 71°, low 54°.

Pressure30.12 inHg

Wind12.3 mph SW

Humidity49%

Visibility—

Dew point47°

Thu, 2974° / 54°

0.03

74 °

Shamrock, Thursday, 29 October

Light rain. High 74°, low 54°.

Pressure30.09 inHg

Wind14 mph SW

Humidity37%

Visibility—

Dew point44°

Fri, 3053° / 48°

1.51

53 °

Shamrock, Friday, 30 October

Rain. High 53°, low 48°.

Pressure30.21 inHg

Wind11.7 mph NE

Humidity91%

Visibility—

Dew point46°

Sat, 3158° / 49°

0.06

58 °

Shamrock, Saturday, 31 October

Light rain. High 58°, low 49°.

Pressure30.12 inHg

Wind8 mph E

Humidity85%

Visibility—

Dew point51°

Sun, 0164° / 54°

64 °

Shamrock, Sunday, 1 November

Overcast. High 64°, low 54°.

Pressure30.12 inHg

Wind4.3 mph N

Humidity62%

Visibility—

Dew point48°

Mon, 0262° / 52°

0.08

62 °

Shamrock, Monday, 2 November

Light rain. High 62°, low 52°.

Pressure30.00 inHg

Wind12.1 mph SE

Humidity65%

Visibility—

Dew point48°

Tue, 0362° / 58°

0.33

62 °

Shamrock, Tuesday, 3 November

Rain. High 62°, low 58°.

Pressure29.68 inHg

Wind14.3 mph S

Humidity95%

Visibility—

Dew point59°

Wed, 0470° / 59°

0.17

70 °

Shamrock, Wednesday, 4 November

Rain. High 70°, low 59°.

Pressure29.68 inHg

Wind10.8 mph NW

Humidity66%

Visibility—

Dew point57°

Thu, 0572° / 57°

0.09

72 °

Shamrock, Thursday, 5 November

Light rain. High 72°, low 57°.

Pressure29.80 inHg

Wind9.4 mph SW

Humidity64%

Visibility—

Dew point56°

Fri, 0668° / 55°

68 °

Shamrock, Friday, 6 November

Overcast. High 68°, low 55°.

Pressure29.91 inHg

Wind13.1 mph W

Humidity60%

Visibility—

Dew point49°

Sat, 0771° / 52°

71 °

Shamrock, Saturday, 7 November

Clear. High 71°, low 52°.

Pressure29.83 inHg

Wind14.1 mph W

Humidity41%

Visibility—

Dew point42°

From day 17 onward the outlook is built from 60-year climate statistics

Sun, 0853° / 39°

0.04

53 °

Shamrock, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high53°

Average low39°

Average precipitation0.04 in

Chance of precipitation15%

Record high74° (1999)

Record low10° (1991)

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)

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.