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As of 13:20 CDT

Weather in Mattoon, IL

88°Current weather

Mattoon, Saturday, 8 August, 13:20

Clear. Feels like 101°. High 88°, low 71°.

Pressure30.06 inHg
Wind2 mph S
Humidity71%
Visibility6.2 mi
Dew point77°
Sun, 0992° / 71°0Partly cloudy
92 °Partly cloudy

Mattoon, Sunday, 9 August

Partly cloudy. High 92°, low 71°.

Pressure30.00 inHg
Wind12.9 mph S
Humidity68%
Visibility6.2 mi
Dew point73°
Mon, 1090° / 75°0Overcast
90 °Overcast

Mattoon, Monday, 10 August

Overcast. High 90°, low 75°.

Pressure29.94 inHg
Wind15.8 mph S
Humidity68%
Visibility6.2 mi
Dew point74°
Tue, 1192° / 73°0.04Light rain
92 °Light rain

Mattoon, Tuesday, 11 August

Light rain. High 92°, low 73°.

Pressure29.88 inHg
Wind14.9 mph SW
Humidity65%
Visibility6.2 mi
Dew point74°
Wed, 1281° / 67°0.52Rain
81 °Rain

Mattoon, Wednesday, 12 August

Rain. High 81°, low 67°.

Pressure29.88 inHg
Wind23.4 mph N
Humidity95%
Visibility6.2 mi
Dew point71°
Thu, 1372° / 63°0.65Rain
72 °Rain

Mattoon, Thursday, 13 August

Rain. High 72°, low 63°.

Pressure29.83 inHg
Wind11.5 mph N
Humidity97%
Visibility—
Dew point71°
Fri, 1474° / 55°0Clear
74 °Clear

Mattoon, Friday, 14 August

Clear. High 74°, low 55°.

Pressure30.18 inHg
Wind5.6 mph NE
Humidity58%
Visibility—
Dew point54°
Sat, 1575° / 57°0Overcast
75 °Overcast

Mattoon, Saturday, 15 August

Overcast. High 75°, low 57°.

Pressure30.21 inHg
Wind7 mph SE
Humidity62%
Visibility—
Dew point58°
Sun, 1668° / 64°0.31Light rain
68 °Light rain

Mattoon, Sunday, 16 August

Light rain. High 68°, low 64°.

Pressure30.12 inHg
Wind13.8 mph SE
Humidity90%
Visibility—
Dew point64°
Mon, 1775° / 66°0.15Rain
75 °Rain

Mattoon, Monday, 17 August

Rain. High 75°, low 66°.

Pressure29.94 inHg
Wind9.8 mph SE
Humidity94%
Visibility—
Dew point71°
Tue, 1884° / 67°0.01Light rain
84 °Light rain

Mattoon, Tuesday, 18 August

Light rain. High 84°, low 67°.

Pressure29.94 inHg
Wind9.4 mph SW
Humidity67%
Visibility—
Dew point69°
Wed, 1986° / 63°0.17Rain
86 °Rain

Mattoon, Wednesday, 19 August

Rain. High 86°, low 63°.

Pressure29.91 inHg
Wind14.9 mph N
Humidity66%
Visibility—
Dew point71°
Thu, 2070° / 55°0Partly cloudy
70 °Partly cloudy

Mattoon, Thursday, 20 August

Partly cloudy. High 70°, low 55°.

Pressure30.18 inHg
Wind14.2 mph N
Humidity58%
Visibility—
Dew point52°
Fri, 2170° / 49°0Clear
70 °Clear

Mattoon, Friday, 21 August

Clear. High 70°, low 49°.

Pressure30.24 inHg
Wind7.6 mph NE
Humidity50%
Visibility—
Dew point47°
Sat, 2274° / 52°0Partly cloudy
74 °Partly cloudy

Mattoon, Saturday, 22 August

Partly cloudy. High 74°, low 52°.

Pressure30.15 inHg
Wind3.1 mph NE
Humidity53%
Visibility—
Dew point52°
Sun, 2376° / 54°0Clear
76 °Clear

Mattoon, Sunday, 23 August

Clear. High 76°, low 54°.

Pressure30.12 inHg
Wind4.5 mph S
Humidity52%
Visibility—
Dew point53°

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 Mattoon, 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 Mattoon, 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.