As of 12:41 CDT

Weather in Spring Bay, IL

85°

Spring Bay, Monday, 12 October, 12:41

Partly cloudy. Feels like 88°. High 87°, low 63°.

Pressure29.85 inHg

Wind4 mph S

Humidity56%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

Monthly outlook for Spring Bay, IL: average high 70.8°, average low 55°. That is 5.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 12 October (86.5°), the coolest 17 October (39.7°).

70.8°/55°

Average high / low

+5.4°

Above normal

4 / 5

Wet days / normal

1.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
12 October – 21 October	71°	62.3°	+4.9°
22 October – 31 October	70.3°	58.5°	+6.6°
1 November – 10 November	at normal	53.8°	—

October records over 66 years

89.1°3 October 2025All-time high

21°22 October 1976All-time low

Climate normals and records are computed from the nearest reference point — Peoria (7 mi).

Tue, 1385° / 65°

0.02

85 °

Spring Bay, Tuesday, 13 October

Light rain. High 85°, low 65°.

Pressure29.88 inHg

Wind5.9 mph W

Humidity64%

Visibility6.2 mi

Dew point65°

Wed, 1476° / 62°

0.04

76 °

Spring Bay, Wednesday, 14 October

Light rain. High 76°, low 62°.

Pressure30.06 inHg

Wind6.1 mph NE

Humidity70%

Visibility6.2 mi

Dew point62°

Thu, 1565° / 59°

0.36

65 °

Spring Bay, Thursday, 15 October

Rain. High 65°, low 59°.

Pressure30.03 inHg

Wind6.9 mph NE

Humidity96%

Visibility2.5 mi

Dew point61°

Fri, 1660° / 48°

60 °

Spring Bay, Friday, 16 October

Partly cloudy. High 60°, low 48°.

Pressure30.39 inHg

Wind18.3 mph N

Humidity48%

Visibility6.2 mi

Dew point37°

Sat, 1761° / 40°

61 °

Spring Bay, Saturday, 17 October

Clear. High 61°, low 40°.

Pressure30.47 inHg

Wind6.8 mph SW

Humidity37%

Visibility—

Dew point31°

Sun, 1864° / 42°

64 °

Spring Bay, Sunday, 18 October

Clear. High 64°, low 42°.

Pressure30.27 inHg

Wind15.4 mph SW

Humidity34%

Visibility—

Dew point30°

Mon, 1962° / 49°

0.05

62 °

Spring Bay, Monday, 19 October

Light rain. High 62°, low 49°.

Pressure30.21 inHg

Wind12.1 mph S

Humidity52%

Visibility—

Dew point43°

Tue, 2072° / 54°

0.09

72 °

Spring Bay, Tuesday, 20 October

Light rain. High 72°, low 54°.

Pressure30.21 inHg

Wind8.2 mph E

Humidity59%

Visibility—

Dew point52°

Wed, 2178° / 59°

78 °

Spring Bay, Wednesday, 21 October

Mostly clear. High 78°, low 59°.

Pressure30.24 inHg

Wind9.3 mph SE

Humidity59%

Visibility—

Dew point58°

Thu, 2279° / 64°

79 °

Spring Bay, Thursday, 22 October

Overcast. High 79°, low 64°.

Pressure30.27 inHg

Wind13.7 mph S

Humidity50%

Visibility—

Dew point56°

Fri, 2379° / 68°

79 °

Spring Bay, Friday, 23 October

Overcast. High 79°, low 68°.

Pressure30.21 inHg

Wind13.4 mph S

Humidity54%

Visibility—

Dew point57°

Sat, 2478° / 65°

0.7

78 °

Spring Bay, Saturday, 24 October

Rain. High 78°, low 65°.

Pressure29.94 inHg

Wind19.9 mph S

Humidity55%

Visibility—

Dew point59°

Sun, 2566° / 51°

66 °

Spring Bay, Sunday, 25 October

Overcast. High 66°, low 51°.

Pressure30.00 inHg

Wind19.3 mph W

Humidity69%

Visibility—

Dew point46°

Mon, 2657° / 42°

57 °

Spring Bay, Monday, 26 October

Clear. High 57°, low 42°.

Pressure30.21 inHg

Wind14.5 mph NW

Humidity44%

Visibility—

Dew point32°

Tue, 2763° / 47°

63 °

Spring Bay, Tuesday, 27 October

Clear. High 63°, low 47°.

Pressure29.83 inHg

Wind19.2 mph N

Humidity53%

Visibility—

Dew point44°

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

Wed, 2857° / 42°

0.04

57 °

Spring Bay, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.04 in

Chance of precipitation20%

Record high74° (1999)

Record low25° (1976)

Thu, 2957° / 42°

0.08

57 °

Spring Bay, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.08 in

Chance of precipitation25%

Record high78° (2024)

Record low23° (1980)

Fri, 3059° / 43°

0.11

59 °

Spring Bay, Friday, 30 October

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.11 in

Chance of precipitation28%

Record high79° (1971)

Record low25° (1988)

Sat, 3158° / 43°

0.17

58 °

Spring Bay, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high58°

Average low43°

Average precipitation0.17 in

Chance of precipitation42%

Record high74° (1974)

Record low24° (2019)

Sun, 0157° / 42°

0.18

57 °

Spring Bay, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.18 in

Chance of precipitation32%

Record high77° (2016)

Record low22° (2019)

Mon, 0255° / 41°

0.08

55 °

Spring Bay, Monday, 2 November

Climate normal for this date — 60-year average.

Average high55°

Average low41°

Average precipitation0.08 in

Chance of precipitation33%

Record high75° (1961)

Record low23° (1991)

Tue, 0354° / 40°

0.09

54 °

Spring Bay, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high54°

Average low40°

Average precipitation0.09 in

Chance of precipitation23%

Record high74° (1964)

Record low17° (1991)

Wed, 0454° / 41°

0.08

54 °

Spring Bay, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high54°

Average low41°

Average precipitation0.08 in

Chance of precipitation23%

Record high74° (1978)

Record low16° (1991)

Thu, 0553° / 39°

0.13

53 °

Spring Bay, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high53°

Average low39°

Average precipitation0.13 in

Chance of precipitation25%

Record high74° (1978)

Record low19° (1991)

Fri, 0653° / 38°

0.09

53 °

Spring Bay, Friday, 6 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.09 in

Chance of precipitation25%

Record high71° (2020)

Record low24° (1991)

Sat, 0753° / 38°

0.04

53 °

Spring Bay, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.04 in

Chance of precipitation17%

Record high69° (1966)

Record low15° (1991)

Sun, 0853° / 38°

0.05

53 °

Spring Bay, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.05 in

Chance of precipitation20%

Record high75° (1999)

Record low12° (1991)

Mon, 0954° / 39°

0.14

54 °

Spring Bay, Monday, 9 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.14 in

Chance of precipitation35%

Record high74° (2020)

Record low16° (1991)

Tue, 1051° / 37°

0.15

51 °

Spring Bay, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.15 in

Chance of precipitation32%

Record high73° (2020)

Record low17° (2018)

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 Spring Bay, 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 Spring Bay, 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.