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As of 00:43 CDT

Weather in Johnston City, IL

72°Current weather

Johnston City, Sunday, 9 August, 00:43

Clear. Feels like 73°. High 94°, low 72°.

Pressure30.03 inHg
Wind6 mph S
Humidity91%
Visibility6.2 mi
Dew point69°
Mon, 1098° / 75°0Overcast
98 °Overcast

Johnston City, Monday, 10 August

Overcast. High 98°, low 75°.

Pressure30.03 inHg
Wind13.1 mph SW
Humidity50%
Visibility6.2 mi
Dew point69°
Tue, 11100° / 78°0Clear
100 °Clear

Johnston City, Tuesday, 11 August

Clear. High 100°, low 78°.

Pressure29.91 inHg
Wind14.4 mph SW
Humidity36%
Visibility6.2 mi
Dew point66°
Wed, 1288° / 76°0.21Rain
88 °Rain

Johnston City, Wednesday, 12 August

Rain. High 88°, low 76°.

Pressure29.85 inHg
Wind4.4 mph S
Humidity69%
Visibility6.2 mi
Dew point68°
Thu, 1378° / 72°1.28Heavy rain
78 °Heavy rain

Johnston City, Thursday, 13 August

Heavy rain. High 78°, low 72°.

Pressure29.94 inHg
Wind10.6 mph NE
Humidity84%
Visibility—
Dew point72°
Fri, 1483° / 70°0.71Heavy rain
83 °Heavy rain

Johnston City, Friday, 14 August

Heavy rain. High 83°, low 70°.

Pressure30.00 inHg
Wind11.3 mph NE
Humidity76%
Visibility—
Dew point71°
Sat, 1580° / 67°0.15Light rain
80 °Light rain

Johnston City, Saturday, 15 August

Light rain. High 80°, low 67°.

Pressure30.18 inHg
Wind12.9 mph E
Humidity74%
Visibility—
Dew point66°
Sun, 1690° / 67°0.08Light rain
90 °Light rain

Johnston City, Sunday, 16 August

Light rain. High 90°, low 67°.

Pressure30.03 inHg
Wind8.8 mph E
Humidity57%
Visibility—
Dew point70°
Mon, 1789° / 71°0.07Light rain
89 °Light rain

Johnston City, Monday, 17 August

Light rain. High 89°, low 71°.

Pressure30.03 inHg
Wind7.8 mph NE
Humidity84%
Visibility—
Dew point72°
Tue, 1890° / 70°0.09Light rain
90 °Light rain

Johnston City, Tuesday, 18 August

Light rain. High 90°, low 70°.

Pressure30.00 inHg
Wind7.9 mph NW
Humidity59%
Visibility—
Dew point71°
Wed, 1991° / 70°0Overcast
91 °Overcast

Johnston City, Wednesday, 19 August

Overcast. High 91°, low 70°.

Pressure29.88 inHg
Wind11.7 mph N
Humidity47%
Visibility—
Dew point65°
Thu, 2080° / 62°0Clear
80 °Clear

Johnston City, Thursday, 20 August

Clear. High 80°, low 62°.

Pressure30.00 inHg
Wind10.4 mph NE
Humidity48%
Visibility—
Dew point55°
Fri, 2179° / 60°0.08Light rain
79 °Light rain

Johnston City, Friday, 21 August

Light rain. High 79°, low 60°.

Pressure30.00 inHg
Wind11 mph E
Humidity53%
Visibility—
Dew point53°
Sat, 2295° / 64°0.19Light rain
95 °Light rain

Johnston City, Saturday, 22 August

Light rain. High 95°, low 64°.

Pressure29.83 inHg
Wind14.3 mph S
Humidity50%
Visibility—
Dew point65°
Sun, 2395° / 71°0.02Light rain
95 °Light rain

Johnston City, Sunday, 23 August

Light rain. High 95°, low 71°.

Pressure29.94 inHg
Wind10.3 mph SW
Humidity43%
Visibility—
Dew point65°
Mon, 2490° / 74°0.08Light rain
90 °Light rain

Johnston City, Monday, 24 August

Light rain. High 90°, low 74°.

Pressure30.00 inHg
Wind9.9 mph W
Humidity50%
Visibility—
Dew point67°

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 Johnston City, 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 Johnston City, 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.