As of 01:35 CDT

Weather in Galena, IL

62°

Galena, Sunday, 9 August, 01:35

Clear. Feels like 63°. High 83°, low 62°.

Pressure30.00 inHg

Wind3.9 mph S

Humidity97%

Visibility6.2 mi

Dew point61°

See detailed hourly forecast

Monthly outlook for Galena, IL: average high 81.2°, average low 64.7°. That is 1.2° above the climate normal for August. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 20 August (92.5°), the coolest 22 August (57.5°).

81.2°/64.7°

Average high / low

+1.2°

Above normal

4 / 5

Wet days / normal

1.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	80°	79.2°	+0.4°
19 August – 28 August	83.3°	79.2°	+2.3°
29 August – 7 September	at normal	77.1°	—

August records over 66 years

98.2°23 August 2023All-time high

45.5°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Benton (10 mi).

Mon, 1087° / 71°

0.1

87 °

Galena, Monday, 10 August

Light rain. High 87°, low 71°.

Pressure29.91 inHg

Wind5.1 mph SE

Humidity80%

Visibility6.2 mi

Dew point72°

Tue, 1186° / 70°

0.04

86 °

Galena, Tuesday, 11 August

Light rain. High 86°, low 70°.

Pressure29.80 inHg

Wind9.6 mph W

Humidity71%

Visibility6.2 mi

Dew point70°

Wed, 1282° / 67°

82 °

Galena, Wednesday, 12 August

Overcast. High 82°, low 67°.

Pressure29.85 inHg

Wind8.5 mph N

Humidity71%

Visibility6.2 mi

Dew point70°

Thu, 1374° / 61°

0.04

74 °

Galena, Thursday, 13 August

Light rain. High 74°, low 61°.

Pressure30.03 inHg

Wind8 mph E

Humidity64%

Visibility—

Dew point60°

Fri, 1474° / 58°

0.01

74 °

Galena, Friday, 14 August

Light rain. High 74°, low 58°.

Pressure30.15 inHg

Wind10 mph E

Humidity59%

Visibility—

Dew point56°

Sat, 1576° / 60°

0.03

76 °

Galena, Saturday, 15 August

Light rain. High 76°, low 60°.

Pressure30.21 inHg

Wind10.9 mph SE

Humidity63%

Visibility—

Dew point58°

Sun, 1677° / 65°

0.01

77 °

Galena, Sunday, 16 August

Light rain. High 77°, low 65°.

Pressure30.09 inHg

Wind6.8 mph NW

Humidity84%

Visibility—

Dew point67°

Mon, 1780° / 63°

80 °

Galena, Monday, 17 August

Overcast. High 80°, low 63°.

Pressure30.09 inHg

Wind5.6 mph N

Humidity60%

Visibility—

Dew point62°

Tue, 1881° / 62°

0.01

81 °

Galena, Tuesday, 18 August

Light rain. High 81°, low 62°.

Pressure30.00 inHg

Wind11.6 mph S

Humidity87%

Visibility—

Dew point67°

Wed, 1989° / 70°

89 °

Galena, Wednesday, 19 August

Overcast. High 89°, low 70°.

Pressure29.83 inHg

Wind13.9 mph SE

Humidity68%

Visibility—

Dew point71°

Thu, 2093° / 74°

93 °

Galena, Thursday, 20 August

Light rain. High 93°, low 74°.

Pressure29.77 inHg

Wind12.4 mph N

Humidity57%

Visibility—

Dew point72°

Fri, 2186° / 69°

86 °

Galena, Friday, 21 August

Mostly clear. High 86°, low 69°.

Pressure29.94 inHg

Wind10.8 mph NE

Humidity55%

Visibility—

Dew point65°

Sat, 2275° / 58°

0.31

75 °

Galena, Saturday, 22 August

Rain. High 75°, low 58°.

Pressure29.85 inHg

Wind11.3 mph SE

Humidity77%

Visibility—

Dew point61°

Sun, 2378° / 64°

78 °

Galena, Sunday, 23 August

Clear. High 78°, low 64°.

Pressure29.94 inHg

Wind14.1 mph NW

Humidity53%

Visibility—

Dew point57°

Mon, 2480° / 60°

80 °

Galena, Monday, 24 August

Overcast. High 80°, low 60°.

Pressure30.00 inHg

Wind7 mph SE

Humidity58%

Visibility—

Dew point61°

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

Tue, 2580° / 64°

0.13

80 °

Galena, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low64°

Average precipitation0.13 in

Chance of precipitation28%

Record high91° (2003)

Record low51° (2025)

Wed, 2679° / 64°

0.13

79 °

Galena, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high79°

Average low64°

Average precipitation0.13 in

Chance of precipitation33%

Record high93° (2024)

Record low50° (1964)

Thu, 2779° / 65°

0.13

79 °

Galena, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high79°

Average low65°

Average precipitation0.13 in

Chance of precipitation28%

Record high94° (2024)

Record low51° (1968)

Fri, 2879° / 63°

0.17

79 °

Galena, Friday, 28 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.17 in

Chance of precipitation37%

Record high93° (1984)

Record low46° (1986)

Sat, 2979° / 63°

0.13

79 °

Galena, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.13 in

Chance of precipitation33%

Record high93° (1984)

Record low46° (1986)

Sun, 3078° / 62°

0.07

78 °

Galena, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.07 in

Chance of precipitation27%

Record high93° (2013)

Record low51° (1974)

Mon, 3178° / 62°

0.07

78 °

Galena, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.07 in

Chance of precipitation20%

Record high91° (2000)

Record low46° (2009)

Tue, 0178° / 62°

0.1

78 °

Galena, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.1 in

Chance of precipitation20%

Record high90° (2011)

Record low49° (1967)

Wed, 0278° / 62°

0.06

78 °

Galena, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.06 in

Chance of precipitation28%

Record high90° (1960)

Record low47° (1967)

Thu, 0377° / 62°

0.15

77 °

Galena, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high77°

Average low62°

Average precipitation0.15 in

Chance of precipitation30%

Record high92° (2023)

Record low47° (1974)

Fri, 0476° / 60°

0.1

76 °

Galena, Friday, 4 September

Climate normal for this date — 60-year average.

Average high76°

Average low60°

Average precipitation0.1 in

Chance of precipitation32%

Record high92° (2023)

Record low45° (2025)

Sat, 0576° / 60°

0.07

76 °

Galena, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high76°

Average low60°

Average precipitation0.07 in

Chance of precipitation20%

Record high89° (2023)

Record low46° (1974)

Sun, 0676° / 60°

0.06

76 °

Galena, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high76°

Average low60°

Average precipitation0.06 in

Chance of precipitation27%

Record high90° (1990)

Record low43° (1962)

Mon, 0776° / 60°

0.12

76 °

Galena, Monday, 7 September

Climate normal for this date — 60-year average.

Average high76°

Average low60°

Average precipitation0.12 in

Chance of precipitation27%

Record high90° (1960)

Record low44° (2025)

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 Galena, 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 Galena, 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.