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As of 14:01 CDT

Weather in Sullivan, IL

88°Current weather

Sullivan, Saturday, 8 August, 14:01

Overcast. Feels like 99°. High 88°, low 71°.

Pressure30.00 inHg
Wind6.3 mph W
Humidity69%
Visibility6.2 mi
Dew point76°
Sun, 0993° / 71°0Overcast
93 °Overcast

Sullivan, Sunday, 9 August

Overcast. High 93°, low 71°.

Pressure29.97 inHg
Wind13.8 mph S
Humidity65%
Visibility6.2 mi
Dew point73°
Mon, 1092° / 75°0Mostly clear
92 °Mostly clear

Sullivan, Monday, 10 August

Mostly clear. High 92°, low 75°.

Pressure29.94 inHg
Wind14 mph SW
Humidity61%
Visibility6.2 mi
Dew point73°
Tue, 1191° / 76°0Overcast
91 °Overcast

Sullivan, Tuesday, 11 August

Overcast. High 91°, low 76°.

Pressure29.88 inHg
Wind16.3 mph SW
Humidity55%
Visibility6.2 mi
Dew point71°
Wed, 1288° / 71°0.05Light rain
88 °Light rain

Sullivan, Wednesday, 12 August

Light rain. High 88°, low 71°.

Pressure29.83 inHg
Wind6.9 mph N
Humidity70%
Visibility6.2 mi
Dew point75°
Thu, 1378° / 66°0.52Rain
78 °Rain

Sullivan, Thursday, 13 August

Rain. High 78°, low 66°.

Pressure29.91 inHg
Wind12.5 mph NE
Humidity77%
Visibility—
Dew point69°
Fri, 1475° / 57°0Clear
75 °Clear

Sullivan, Friday, 14 August

Clear. High 75°, low 57°.

Pressure30.15 inHg
Wind11.3 mph NE
Humidity50%
Visibility—
Dew point52°
Sat, 1576° / 54°0Partly cloudy
76 °Partly cloudy

Sullivan, Saturday, 15 August

Partly cloudy. High 76°, low 54°.

Pressure30.30 inHg
Wind6.7 mph E
Humidity53%
Visibility—
Dew point53°
Sun, 1679° / 56°0Overcast
79 °Overcast

Sullivan, Sunday, 16 August

Overcast. High 79°, low 56°.

Pressure30.21 inHg
Wind11.5 mph S
Humidity53%
Visibility—
Dew point56°
Mon, 1785° / 67°0.04Light rain
85 °Light rain

Sullivan, Monday, 17 August

Light rain. High 85°, low 67°.

Pressure29.97 inHg
Wind15.5 mph S
Humidity76%
Visibility—
Dew point71°
Tue, 1885° / 71°0Overcast
85 °Overcast

Sullivan, Tuesday, 18 August

Overcast. High 85°, low 71°.

Pressure30.00 inHg
Wind9.2 mph NE
Humidity63%
Visibility—
Dew point69°
Wed, 1988° / 68°0Overcast
88 °Overcast

Sullivan, Wednesday, 19 August

Overcast. High 88°, low 68°.

Pressure29.94 inHg
Wind7.6 mph S
Humidity59%
Visibility—
Dew point68°
Thu, 2084° / 71°0.36Rain
84 °Rain

Sullivan, Thursday, 20 August

Rain. High 84°, low 71°.

Pressure29.88 inHg
Wind10.2 mph W
Humidity60%
Visibility—
Dew point67°
Fri, 2182° / 65°0Partly cloudy
82 °Partly cloudy

Sullivan, Friday, 21 August

Partly cloudy. High 82°, low 65°.

Pressure29.94 inHg
Wind11.7 mph NE
Humidity53%
Visibility—
Dew point61°
Sat, 2286° / 63°0Clear
86 °Clear

Sullivan, Saturday, 22 August

Clear. High 86°, low 63°.

Pressure29.91 inHg
Wind17.4 mph NE
Humidity48%
Visibility—
Dew point60°
Sun, 2374° / 55°0Light rain
74 °Light rain

Sullivan, Sunday, 23 August

Light rain. High 74°, low 55°.

Pressure30.15 inHg
Wind14.4 mph E
Humidity42%
Visibility—
Dew point46°

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 Sullivan, 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 Sullivan, 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.