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As of 16:35 CDT

Weather in Waterloo, IL

89°Current weather

Waterloo, Saturday, 8 August, 16:35

Clear. Feels like 101°. High 89°, low 69°.

Pressure29.97 inHg
Wind3.9 mph NE
Humidity66%
Visibility6.2 mi
Dew point76°
Sun, 0995° / 72°0Partly cloudy
95 °Partly cloudy

Waterloo, Sunday, 9 August

Partly cloudy. High 95°, low 72°.

Pressure29.97 inHg
Wind11.3 mph S
Humidity51%
Visibility6.2 mi
Dew point71°
Mon, 10100° / 74°0Clear
100 °Clear

Waterloo, Monday, 10 August

Clear. High 100°, low 74°.

Pressure29.94 inHg
Wind11.9 mph SW
Humidity42%
Visibility6.2 mi
Dew point69°
Tue, 11102° / 74°0.02Light rain
102 °Light rain

Waterloo, Tuesday, 11 August

Light rain. High 102°, low 74°.

Pressure29.88 inHg
Wind10.2 mph SW
Humidity38%
Visibility6.2 mi
Dew point67°
Wed, 1288° / 72°0.04Light rain
88 °Light rain

Waterloo, Wednesday, 12 August

Light rain. High 88°, low 72°.

Pressure29.85 inHg
Wind10.2 mph SW
Humidity60%
Visibility6.2 mi
Dew point68°
Thu, 1379° / 71°0.37Rain
79 °Rain

Waterloo, Thursday, 13 August

Rain. High 79°, low 71°.

Pressure29.88 inHg
Wind10.6 mph E
Humidity77%
Visibility—
Dew point70°
Fri, 1478° / 64°0.04Light rain
78 °Light rain

Waterloo, Friday, 14 August

Light rain. High 78°, low 64°.

Pressure30.12 inHg
Wind11.4 mph NE
Humidity49%
Visibility—
Dew point56°
Sat, 1580° / 56°0Overcast
80 °Overcast

Waterloo, Saturday, 15 August

Overcast. High 80°, low 56°.

Pressure30.27 inHg
Wind8.6 mph E
Humidity44%
Visibility—
Dew point51°
Sun, 1682° / 61°0.12Light rain
82 °Light rain

Waterloo, Sunday, 16 August

Light rain. High 82°, low 61°.

Pressure30.18 inHg
Wind12.2 mph SE
Humidity69%
Visibility—
Dew point63°
Mon, 1799° / 71°0.29Rain
99 °Rain

Waterloo, Monday, 17 August

Rain. High 99°, low 71°.

Pressure29.91 inHg
Wind16.7 mph S
Humidity45%
Visibility—
Dew point67°
Tue, 1889° / 74°0Overcast
89 °Overcast

Waterloo, Tuesday, 18 August

Overcast. High 89°, low 74°.

Pressure29.97 inHg
Wind10.1 mph NE
Humidity54%
Visibility—
Dew point68°
Wed, 1992° / 72°0Mostly clear
92 °Mostly clear

Waterloo, Wednesday, 19 August

Mostly clear. High 92°, low 72°.

Pressure29.88 inHg
Wind7.9 mph SE
Humidity51%
Visibility—
Dew point69°
Thu, 2087° / 73°0.1Light rain
87 °Light rain

Waterloo, Thursday, 20 August

Light rain. High 87°, low 73°.

Pressure29.85 inHg
Wind10.1 mph NW
Humidity59%
Visibility—
Dew point69°
Fri, 2183° / 70°0.06Light rain
83 °Light rain

Waterloo, Friday, 21 August

Light rain. High 83°, low 70°.

Pressure29.91 inHg
Wind10.3 mph NE
Humidity68%
Visibility—
Dew point68°
Sat, 2286° / 66°0Overcast
86 °Overcast

Waterloo, Saturday, 22 August

Overcast. High 86°, low 66°.

Pressure29.91 inHg
Wind7.1 mph NE
Humidity44%
Visibility—
Dew point58°
Sun, 2375° / 62°0.01Light rain
75 °Light rain

Waterloo, Sunday, 23 August

Light rain. High 75°, low 62°.

Pressure30.12 inHg
Wind13.1 mph NE
Humidity57%
Visibility—
Dew point56°

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 Waterloo, 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 Waterloo, 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.