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As of 10:25 CDT

Weather in Grantsburg, IL

81°Current weather

Grantsburg, Sunday, 9 August, 10:25

Clear. Feels like 89°. High 87°, low 70°.

Pressure30.09 inHg
Wind7.6 mph S
Humidity85%
Visibility6.2 mi
Dew point76°
Mon, 1094° / 73°0Clear
94 °Clear

Grantsburg, Monday, 10 August

Clear. High 94°, low 73°.

Pressure30.03 inHg
Wind11.8 mph SW
Humidity54%
Visibility6.2 mi
Dew point71°
Tue, 1196° / 74°0Clear
96 °Clear

Grantsburg, Tuesday, 11 August

Clear. High 96°, low 74°.

Pressure29.97 inHg
Wind10.5 mph SW
Humidity48%
Visibility6.2 mi
Dew point70°
Wed, 1298° / 72°0.06Light rain
98 °Light rain

Grantsburg, Wednesday, 12 August

Light rain. High 98°, low 72°.

Pressure29.88 inHg
Wind10.5 mph SW
Humidity55%
Visibility6.2 mi
Dew point71°
Thu, 1392° / 71°0.09Light rain
92 °Light rain

Grantsburg, Thursday, 13 August

Light rain. High 92°, low 71°.

Pressure29.91 inHg
Wind12.2 mph E
Humidity55%
Visibility—
Dew point69°
Fri, 1498° / 75°0.01Light rain
98 °Light rain

Grantsburg, Friday, 14 August

Light rain. High 98°, low 75°.

Pressure29.97 inHg
Wind10.4 mph S
Humidity46%
Visibility—
Dew point67°
Sat, 1598° / 74°0Overcast
98 °Overcast

Grantsburg, Saturday, 15 August

Overcast. High 98°, low 74°.

Pressure30.09 inHg
Wind7.2 mph E
Humidity40%
Visibility—
Dew point66°
Sun, 16105° / 76°0Clear
105 °Clear

Grantsburg, Sunday, 16 August

Clear. High 105°, low 76°.

Pressure30.00 inHg
Wind11.9 mph W
Humidity25%
Visibility—
Dew point58°
Mon, 1788° / 70°0.01Light rain
88 °Light rain

Grantsburg, Monday, 17 August

Light rain. High 88°, low 70°.

Pressure30.03 inHg
Wind8.7 mph NE
Humidity42%
Visibility—
Dew point59°
Tue, 1896° / 67°0.01Light rain
96 °Light rain

Grantsburg, Tuesday, 18 August

Light rain. High 96°, low 67°.

Pressure29.88 inHg
Wind11.9 mph SW
Humidity50%
Visibility—
Dew point62°
Wed, 1995° / 74°0.06Light rain
95 °Light rain

Grantsburg, Wednesday, 19 August

Light rain. High 95°, low 74°.

Pressure29.83 inHg
Wind9.5 mph N
Humidity46%
Visibility—
Dew point66°
Thu, 2088° / 66°0Clear
88 °Clear

Grantsburg, Thursday, 20 August

Clear. High 88°, low 66°.

Pressure29.91 inHg
Wind8.6 mph E
Humidity42%
Visibility—
Dew point57°
Fri, 2192° / 63°0Clear
92 °Clear

Grantsburg, Friday, 21 August

Clear. High 92°, low 63°.

Pressure29.88 inHg
Wind9.2 mph SE
Humidity41%
Visibility—
Dew point59°
Sat, 22104° / 76°0.01Light rain
104 °Light rain

Grantsburg, Saturday, 22 August

Light rain. High 104°, low 76°.

Pressure29.77 inHg
Wind14.3 mph N
Humidity28%
Visibility—
Dew point58°
Sun, 2388° / 64°0Clear
88 °Clear

Grantsburg, Sunday, 23 August

Clear. High 88°, low 64°.

Pressure30.06 inHg
Wind10.1 mph NE
Humidity35%
Visibility—
Dew point53°
Mon, 2485° / 61°0Overcast
85 °Overcast

Grantsburg, Monday, 24 August

Overcast. High 85°, low 61°.

Pressure30.15 inHg
Wind10.2 mph NE
Humidity35%
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 Grantsburg, 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 Grantsburg, 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.