EN
English Español

As of 15:37 CDT

Weather in Potomac, IL

86°Current weather

Potomac, Saturday, 8 August, 15:37

Clear. Feels like 98°. High 87°, low 71°.

Pressure30.00 inHg
Wind7.1 mph W
Humidity75%
Visibility6.2 mi
Dew point78°
Sun, 0992° / 70°0Mostly clear
92 °Mostly clear

Potomac, Sunday, 9 August

Mostly clear. High 92°, low 70°.

Pressure29.97 inHg
Wind14.7 mph S
Humidity75%
Visibility6.2 mi
Dew point75°
Mon, 1089° / 75°0.02Light rain
89 °Light rain

Potomac, Monday, 10 August

Light rain. High 89°, low 75°.

Pressure29.94 inHg
Wind9.3 mph SW
Humidity71%
Visibility6.2 mi
Dew point75°
Tue, 1188° / 72°0.04Light rain
88 °Light rain

Potomac, Tuesday, 11 August

Light rain. High 88°, low 72°.

Pressure29.88 inHg
Wind10.8 mph SW
Humidity76%
Visibility6.2 mi
Dew point75°
Wed, 1283° / 68°0.07Light rain
83 °Light rain

Potomac, Wednesday, 12 August

Light rain. High 83°, low 68°.

Pressure29.85 inHg
Wind8.4 mph N
Humidity79%
Visibility6.2 mi
Dew point75°
Thu, 1373° / 64°0.45Rain
73 °Rain

Potomac, Thursday, 13 August

Rain. High 73°, low 64°.

Pressure29.88 inHg
Wind10 mph NE
Humidity93%
Visibility—
Dew point70°
Fri, 1473° / 53°0Clear
73 °Clear

Potomac, Friday, 14 August

Clear. High 73°, low 53°.

Pressure30.18 inHg
Wind10.2 mph NE
Humidity61%
Visibility—
Dew point54°
Sat, 1573° / 52°0Mostly clear
73 °Mostly clear

Potomac, Saturday, 15 August

Mostly clear. High 73°, low 52°.

Pressure30.33 inHg
Wind5.9 mph SE
Humidity64%
Visibility—
Dew point56°
Sun, 1677° / 56°0Overcast
77 °Overcast

Potomac, Sunday, 16 August

Overcast. High 77°, low 56°.

Pressure30.21 inHg
Wind9.4 mph S
Humidity63%
Visibility—
Dew point59°
Mon, 1780° / 65°0.17Light rain
80 °Light rain

Potomac, Monday, 17 August

Light rain. High 80°, low 65°.

Pressure29.97 inHg
Wind9.3 mph S
Humidity83%
Visibility—
Dew point72°
Tue, 1883° / 69°0Light rain
83 °Light rain

Potomac, Tuesday, 18 August

Light rain. High 83°, low 69°.

Pressure30.00 inHg
Wind9.3 mph NE
Humidity70%
Visibility—
Dew point69°
Wed, 1985° / 67°0Overcast
85 °Overcast

Potomac, Wednesday, 19 August

Overcast. High 85°, low 67°.

Pressure29.94 inHg
Wind8.2 mph S
Humidity69%
Visibility—
Dew point69°
Thu, 2079° / 68°0.58Rain
79 °Rain

Potomac, Thursday, 20 August

Rain. High 79°, low 68°.

Pressure29.88 inHg
Wind7.5 mph N
Humidity81%
Visibility—
Dew point71°
Fri, 2180° / 63°0Partly cloudy
80 °Partly cloudy

Potomac, Friday, 21 August

Partly cloudy. High 80°, low 63°.

Pressure29.94 inHg
Wind9.4 mph NE
Humidity67%
Visibility—
Dew point64°
Sat, 2280° / 61°0.01Light rain
80 °Light rain

Potomac, Saturday, 22 August

Light rain. High 80°, low 61°.

Pressure29.91 inHg
Wind16 mph NE
Humidity72%
Visibility—
Dew point66°
Sun, 2367° / 47°0Clear
67 °Clear

Potomac, Sunday, 23 August

Clear. High 67°, low 47°.

Pressure30.21 inHg
Wind13.3 mph NE
Humidity52%
Visibility—
Dew point45°

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 Potomac, 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 Potomac, 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.