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As of 17:01 CDT

Weather in Johnstown, IL

90°Current weather

Johnstown, Saturday, 8 August, 17:01

Mostly clear. Feels like 103°. High 90°, low 71°.

Pressure30.00 inHg
Wind6.9 mph SW
Humidity66%
Visibility6.2 mi
Dew point78°
Sun, 0992° / 72°0Partly cloudy
92 °Partly cloudy

Johnstown, Sunday, 9 August

Partly cloudy. High 92°, low 72°.

Pressure30.00 inHg
Wind12.3 mph S
Humidity68%
Visibility6.2 mi
Dew point73°
Mon, 1091° / 75°0Clear
91 °Clear

Johnstown, Monday, 10 August

Clear. High 91°, low 75°.

Pressure29.97 inHg
Wind12.9 mph SW
Humidity66%
Visibility6.2 mi
Dew point75°
Tue, 1190° / 75°0Overcast
90 °Overcast

Johnstown, Tuesday, 11 August

Overcast. High 90°, low 75°.

Pressure29.88 inHg
Wind14.6 mph SW
Humidity63%
Visibility6.2 mi
Dew point74°
Wed, 1287° / 71°0.34Rain
87 °Rain

Johnstown, Wednesday, 12 August

Rain. High 87°, low 71°.

Pressure29.83 inHg
Wind5.6 mph N
Humidity72%
Visibility6.2 mi
Dew point76°
Thu, 1380° / 68°0.73Rain
80 °Rain

Johnstown, Thursday, 13 August

Rain. High 80°, low 68°.

Pressure29.88 inHg
Wind10.7 mph NE
Humidity77%
Visibility—
Dew point71°
Fri, 1475° / 60°0Clear
75 °Clear

Johnstown, Friday, 14 August

Clear. High 75°, low 60°.

Pressure30.15 inHg
Wind11.9 mph NE
Humidity53%
Visibility—
Dew point54°
Sat, 1574° / 54°0Partly cloudy
74 °Partly cloudy

Johnstown, Saturday, 15 August

Partly cloudy. High 74°, low 54°.

Pressure30.30 inHg
Wind7.1 mph E
Humidity60%
Visibility—
Dew point55°
Sun, 1677° / 57°0Overcast
77 °Overcast

Johnstown, Sunday, 16 August

Overcast. High 77°, low 57°.

Pressure30.21 inHg
Wind10.1 mph S
Humidity60%
Visibility—
Dew point58°
Mon, 1784° / 67°0.09Light rain
84 °Light rain

Johnstown, Monday, 17 August

Light rain. High 84°, low 67°.

Pressure29.97 inHg
Wind14.3 mph S
Humidity83%
Visibility—
Dew point73°
Tue, 1882° / 71°0.01Light rain
82 °Light rain

Johnstown, Tuesday, 18 August

Light rain. High 82°, low 71°.

Pressure29.97 inHg
Wind8.7 mph NE
Humidity72%
Visibility—
Dew point71°
Wed, 1986° / 69°0Overcast
86 °Overcast

Johnstown, Wednesday, 19 August

Overcast. High 86°, low 69°.

Pressure29.94 inHg
Wind7.4 mph S
Humidity67%
Visibility—
Dew point70°
Thu, 2084° / 72°0.28Rain
84 °Rain

Johnstown, Thursday, 20 August

Rain. High 84°, low 72°.

Pressure29.88 inHg
Wind9.8 mph SW
Humidity70%
Visibility—
Dew point70°
Fri, 2182° / 66°0Overcast
82 °Overcast

Johnstown, Friday, 21 August

Overcast. High 82°, low 66°.

Pressure29.94 inHg
Wind11.3 mph NE
Humidity66%
Visibility—
Dew point64°
Sat, 2285° / 64°0Partly cloudy
85 °Partly cloudy

Johnstown, Saturday, 22 August

Partly cloudy. High 85°, low 64°.

Pressure29.91 inHg
Wind16.1 mph NE
Humidity55%
Visibility—
Dew point62°
Sun, 2372° / 55°0Partly cloudy
72 °Partly cloudy

Johnstown, Sunday, 23 August

Partly cloudy. High 72°, low 55°.

Pressure30.15 inHg
Wind13.8 mph E
Humidity50%
Visibility—
Dew point50°

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 Johnstown, 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 Johnstown, 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.