As of 16:31 CDT

Weather in Spring Bay, IL

84°

Spring Bay, Saturday, 8 August, 16:31

Clear. Feels like 89°. High 85°, low 70°.

Pressure30.00 inHg

Wind2.7 mph NW

Humidity64%

Visibility6.2 mi

Dew point71°

See detailed hourly forecast

Monthly outlook for Spring Bay, IL: average high 82°, average low 65°. That is 0.2° above the climate normal for August. Precipitation is expected on 6 days (about 1.0 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (94.2°), the coolest 23 August (49.2°).

82°/65°

Average high / low

+0.2°

Above normal

6 / 5

Wet days / normal

1.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	82.5°	81.6°	+0.5°
18 August – 27 August	81.2°	81.7°	-0.3°
28 August – 6 September	at normal	80.2°	—

August records over 66 years

97.7°1 August 1988All-time high

47.1°29 August 1986All-time low

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

Sun, 0994° / 69°

94 °

Spring Bay, Sunday, 9 August

Light rain. High 94°, low 69°.

Pressure29.91 inHg

Wind14.9 mph S

Humidity67%

Visibility6.2 mi

Dew point75°

Mon, 1090° / 78°

90 °

Spring Bay, Monday, 10 August

Light rain. High 90°, low 78°.

Pressure29.88 inHg

Wind11.9 mph W

Humidity59%

Visibility6.2 mi

Dew point72°

Tue, 1190° / 72°

0.05

90 °

Spring Bay, Tuesday, 11 August

Light rain. High 90°, low 72°.

Pressure29.80 inHg

Wind8.3 mph SW

Humidity63%

Visibility6.2 mi

Dew point73°

Wed, 1281° / 69°

0.05

81 °

Spring Bay, Wednesday, 12 August

Light rain. High 81°, low 69°.

Pressure29.88 inHg

Wind10 mph NE

Humidity77%

Visibility6.2 mi

Dew point70°

Thu, 1371° / 67°

0.34

71 °

Spring Bay, Thursday, 13 August

Rain. High 71°, low 67°.

Pressure29.91 inHg

Wind10.1 mph NE

Humidity94%

Visibility—

Dew point69°

Fri, 1476° / 56°

76 °

Spring Bay, Friday, 14 August

Clear. High 76°, low 56°.

Pressure30.18 inHg

Wind7.9 mph NE

Humidity59%

Visibility—

Dew point57°

Sat, 1575° / 56°

75 °

Spring Bay, Saturday, 15 August

Overcast. High 75°, low 56°.

Pressure30.30 inHg

Wind7.8 mph SE

Humidity53%

Visibility—

Dew point54°

Sun, 1681° / 58°

81 °

Spring Bay, Sunday, 16 August

Overcast. High 81°, low 58°.

Pressure30.18 inHg

Wind12.7 mph S

Humidity67%

Visibility—

Dew point60°

Mon, 1781° / 67°

0.03

81 °

Spring Bay, Monday, 17 August

Light rain. High 81°, low 67°.

Pressure29.94 inHg

Wind9.1 mph S

Humidity81%

Visibility—

Dew point72°

Tue, 1884° / 71°

0.01

84 °

Spring Bay, Tuesday, 18 August

Light rain. High 84°, low 71°.

Pressure30.00 inHg

Wind8.5 mph NE

Humidity66%

Visibility—

Dew point70°

Wed, 1989° / 68°

0.17

89 °

Spring Bay, Wednesday, 19 August

Light rain. High 89°, low 68°.

Pressure29.91 inHg

Wind7.8 mph S

Humidity62%

Visibility—

Dew point70°

Thu, 2081° / 68°

0.27

81 °

Spring Bay, Thursday, 20 August

Light rain. High 81°, low 68°.

Pressure29.88 inHg

Wind10.9 mph N

Humidity66%

Visibility—

Dew point67°

Fri, 2182° / 63°

82 °

Spring Bay, Friday, 21 August

Clear. High 82°, low 63°.

Pressure29.97 inHg

Wind7.5 mph NE

Humidity60%

Visibility—

Dew point63°

Sat, 2282° / 61°

82 °

Spring Bay, Saturday, 22 August

Light rain. High 82°, low 61°.

Pressure29.91 inHg

Wind17.8 mph NE

Humidity60%

Visibility—

Dew point64°

Sun, 2369° / 49°

69 °

Spring Bay, Sunday, 23 August

Mostly clear. High 69°, low 49°.

Pressure30.21 inHg

Wind13.4 mph E

Humidity47%

Visibility—

Dew point44°

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

Mon, 2482° / 65°

0.1

82 °

Spring Bay, Monday, 24 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.1 in

Chance of precipitation32%

Record high97° (2023)

Record low53° (1966)

Tue, 2582° / 65°

0.1

82 °

Spring Bay, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.1 in

Chance of precipitation33%

Record high94° (2014)

Record low54° (1966)

Wed, 2682° / 66°

0.14

82 °

Spring Bay, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.14 in

Chance of precipitation35%

Record high92° (2003)

Record low53° (1964)

Thu, 2782° / 66°

0.09

82 °

Spring Bay, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.09 in

Chance of precipitation23%

Record high94° (2024)

Record low54° (1968)

Fri, 2882° / 65°

0.12

82 °

Spring Bay, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.12 in

Chance of precipitation27%

Record high93° (2013)

Record low49° (1986)

Sat, 2982° / 65°

0.11

82 °

Spring Bay, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.11 in

Chance of precipitation35%

Record high94° (1984)

Record low47° (1986)

Sun, 3081° / 65°

0.06

81 °

Spring Bay, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high81°

Average low65°

Average precipitation0.06 in

Chance of precipitation28%

Record high96° (2013)

Record low52° (1986)

Mon, 3180° / 64°

0.08

80 °

Spring Bay, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.08 in

Chance of precipitation23%

Record high92° (2011)

Record low50° (2009)

Tue, 0180° / 64°

0.17

80 °

Spring Bay, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.17 in

Chance of precipitation28%

Record high98° (2011)

Record low48° (1967)

Wed, 0280° / 64°

0.06

80 °

Spring Bay, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.06 in

Chance of precipitation22%

Record high95° (2011)

Record low49° (1967)

Thu, 0380° / 64°

0.09

80 °

Spring Bay, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.09 in

Chance of precipitation28%

Record high92° (1964)

Record low47° (1974)

Fri, 0479° / 62°

0.11

79 °

Spring Bay, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.11 in

Chance of precipitation32%

Record high91° (2007)

Record low44° (1974)

Sat, 0579° / 62°

0.04

79 °

Spring Bay, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.04 in

Chance of precipitation17%

Record high92° (1990)

Record low50° (1974)

Sun, 0678° / 62°

0.1

78 °

Spring Bay, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.1 in

Chance of precipitation33%

Record high92° (2015)

Record low46° (1962)

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.