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As of 14:57 CDT

Weather in Garrison, IL

90°Current weather

Garrison, Saturday, 8 August, 14:57

Overcast. Feels like 99°. High 90°, low 72°.

Pressure30.03 inHg
Wind4.3 mph SW
Humidity58%
Visibility6.2 mi
Dew point73°
Sun, 0992° / 74°0Partly cloudy
92 °Partly cloudy

Garrison, Sunday, 9 August

Partly cloudy. High 92°, low 74°.

Pressure30.00 inHg
Wind11.7 mph S
Humidity52%
Visibility6.2 mi
Dew point69°
Mon, 1096° / 76°0Partly cloudy
96 °Partly cloudy

Garrison, Monday, 10 August

Partly cloudy. High 96°, low 76°.

Pressure30.00 inHg
Wind14.7 mph SW
Humidity49%
Visibility6.2 mi
Dew point71°
Tue, 1198° / 76°0Mostly clear
98 °Mostly clear

Garrison, Tuesday, 11 August

Mostly clear. High 98°, low 76°.

Pressure29.91 inHg
Wind14.7 mph SW
Humidity44%
Visibility6.2 mi
Dew point69°
Wed, 1293° / 73°0.02Light rain
93 °Light rain

Garrison, Wednesday, 12 August

Light rain. High 93°, low 73°.

Pressure29.83 inHg
Wind10.8 mph W
Humidity52%
Visibility6.2 mi
Dew point71°
Thu, 1380° / 71°0.43Rain
80 °Rain

Garrison, Thursday, 13 August

Rain. High 80°, low 71°.

Pressure29.88 inHg
Wind12.4 mph SW
Humidity76%
Visibility—
Dew point71°
Fri, 1479° / 62°0.01Light rain
79 °Light rain

Garrison, Friday, 14 August

Light rain. High 79°, low 62°.

Pressure30.12 inHg
Wind13 mph NE
Humidity51%
Visibility—
Dew point57°
Sat, 1578° / 56°0Partly cloudy
78 °Partly cloudy

Garrison, Saturday, 15 August

Partly cloudy. High 78°, low 56°.

Pressure30.27 inHg
Wind8.6 mph E
Humidity46%
Visibility—
Dew point52°
Sun, 1684° / 59°0Light rain
84 °Light rain

Garrison, Sunday, 16 August

Light rain. High 84°, low 59°.

Pressure30.21 inHg
Wind9 mph SE
Humidity43%
Visibility—
Dew point53°
Mon, 1789° / 70°0.19Light rain
89 °Light rain

Garrison, Monday, 17 August

Light rain. High 89°, low 70°.

Pressure29.97 inHg
Wind18.7 mph SW
Humidity60%
Visibility—
Dew point70°
Tue, 1890° / 72°0Overcast
90 °Overcast

Garrison, Tuesday, 18 August

Overcast. High 90°, low 72°.

Pressure29.94 inHg
Wind10.7 mph N
Humidity59%
Visibility—
Dew point71°
Wed, 1993° / 71°0Overcast
93 °Overcast

Garrison, Wednesday, 19 August

Overcast. High 93°, low 71°.

Pressure29.91 inHg
Wind8.6 mph E
Humidity55%
Visibility—
Dew point69°
Thu, 2086° / 73°0.89Heavy rain
86 °Heavy rain

Garrison, Thursday, 20 August

Heavy rain. High 86°, low 73°.

Pressure29.85 inHg
Wind10.6 mph NW
Humidity77%
Visibility—
Dew point73°
Fri, 2182° / 71°0.22Light rain
82 °Light rain

Garrison, Friday, 21 August

Light rain. High 82°, low 71°.

Pressure29.88 inHg
Wind10.5 mph N
Humidity78%
Visibility—
Dew point72°
Sat, 2284° / 66°0Overcast
84 °Overcast

Garrison, Saturday, 22 August

Overcast. High 84°, low 66°.

Pressure29.94 inHg
Wind7 mph N
Humidity52%
Visibility—
Dew point61°
Sun, 2377° / 62°0Overcast
77 °Overcast

Garrison, Sunday, 23 August

Overcast. High 77°, low 62°.

Pressure30.09 inHg
Wind13.4 mph NE
Humidity58%
Visibility—
Dew point57°

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 Garrison, 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 Garrison, 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.