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As of 12:20 CDT

Weather in Johnsburg, IL

79°Current weather

Johnsburg, Saturday, 8 August, 12:20

Clear. Feels like 79°. High 83°, low 67°.

Pressure30.03 inHg
Wind3 mph NW
Humidity60%
Visibility6.2 mi
Dew point64°
Sun, 0984° / 63°1.81Heavy rain
84 °Heavy rain

Johnsburg, Sunday, 9 August

Heavy rain. High 84°, low 63°.

Pressure29.91 inHg
Wind12.2 mph S
Humidity95%
Visibility3.7 mi
Dew point65°
Mon, 1086° / 69°0.31Rain
86 °Rain

Johnsburg, Monday, 10 August

Rain. High 86°, low 69°.

Pressure29.88 inHg
Wind2.8 mph SW
Humidity70%
Visibility6.2 mi
Dew point72°
Tue, 1182° / 68°0.13Rain
82 °Rain

Johnsburg, Tuesday, 11 August

Rain. High 82°, low 68°.

Pressure29.74 inHg
Wind13 mph SW
Humidity77%
Visibility6.2 mi
Dew point71°
Wed, 1280° / 63°0.08Light rain
80 °Light rain

Johnsburg, Wednesday, 12 August

Light rain. High 80°, low 63°.

Pressure29.85 inHg
Wind5.1 mph NW
Humidity66%
Visibility6.2 mi
Dew point66°
Thu, 1371° / 57°0.02Light rain
71 °Light rain

Johnsburg, Thursday, 13 August

Light rain. High 71°, low 57°.

Pressure29.91 inHg
Wind12.4 mph N
Humidity76%
Visibility—
Dew point58°
Fri, 1474° / 53°0Clear
74 °Clear

Johnsburg, Friday, 14 August

Clear. High 74°, low 53°.

Pressure30.15 inHg
Wind9.9 mph W
Humidity54%
Visibility—
Dew point53°
Sat, 1575° / 56°0Overcast
75 °Overcast

Johnsburg, Saturday, 15 August

Overcast. High 75°, low 56°.

Pressure30.18 inHg
Wind8 mph W
Humidity57%
Visibility—
Dew point56°
Sun, 1677° / 61°0.06Light rain
77 °Light rain

Johnsburg, Sunday, 16 August

Light rain. High 77°, low 61°.

Pressure30.15 inHg
Wind7.9 mph SE
Humidity57%
Visibility—
Dew point59°
Mon, 1773° / 61°0.02Light rain
73 °Light rain

Johnsburg, Monday, 17 August

Light rain. High 73°, low 61°.

Pressure30.00 inHg
Wind10.8 mph E
Humidity79%
Visibility—
Dew point63°
Tue, 1877° / 62°0.07Light rain
77 °Light rain

Johnsburg, Tuesday, 18 August

Light rain. High 77°, low 62°.

Pressure29.88 inHg
Wind6.6 mph W
Humidity77%
Visibility—
Dew point67°
Wed, 1967° / 58°0.04Light rain
67 °Light rain

Johnsburg, Wednesday, 19 August

Light rain. High 67°, low 58°.

Pressure30.03 inHg
Wind13.8 mph NE
Humidity88%
Visibility—
Dew point58°
Thu, 2064° / 49°0.01Light rain
64 °Light rain

Johnsburg, Thursday, 20 August

Light rain. High 64°, low 49°.

Pressure30.27 inHg
Wind13.9 mph N
Humidity71%
Visibility—
Dew point49°
Fri, 2171° / 49°0Mostly clear
71 °Mostly clear

Johnsburg, Friday, 21 August

Mostly clear. High 71°, low 49°.

Pressure30.24 inHg
Wind10.3 mph W
Humidity50%
Visibility—
Dew point48°
Sat, 2274° / 52°0Clear
74 °Clear

Johnsburg, Saturday, 22 August

Clear. High 74°, low 52°.

Pressure30.12 inHg
Wind10.8 mph W
Humidity50%
Visibility—
Dew point51°
Sun, 2375° / 55°0.03Light rain
75 °Light rain

Johnsburg, Sunday, 23 August

Light rain. High 75°, low 55°.

Pressure30.12 inHg
Wind9.6 mph E
Humidity56%
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 Johnsburg, 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 Johnsburg, 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.