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As of 02:27 CDT

Weather in Saint Mary, IL

70°Current weather

Saint Mary, Sunday, 9 August, 02:27

Overcast. Feels like 72°. High 92°, low 69°.

Pressure29.97 inHg
Wind6.9 mph S
Humidity97%
Visibility6.2 mi
Dew point69°
Mon, 1094° / 75°0Overcast
94 °Overcast

Saint Mary, Monday, 10 August

Overcast. High 94°, low 75°.

Pressure29.88 inHg
Wind7.6 mph W
Humidity59%
Visibility6.2 mi
Dew point70°
Tue, 1196° / 70°0.02Light rain
96 °Light rain

Saint Mary, Tuesday, 11 August

Light rain. High 96°, low 70°.

Pressure29.83 inHg
Wind11.6 mph W
Humidity54%
Visibility6.2 mi
Dew point73°
Wed, 1286° / 72°0.1Light rain
86 °Light rain

Saint Mary, Wednesday, 12 August

Light rain. High 86°, low 72°.

Pressure29.83 inHg
Wind5.7 mph E
Humidity77%
Visibility6.2 mi
Dew point75°
Thu, 1384° / 67°0.02Light rain
84 °Light rain

Saint Mary, Thursday, 13 August

Light rain. High 84°, low 67°.

Pressure29.94 inHg
Wind20.1 mph E
Humidity53%
Visibility—
Dew point63°
Fri, 1466° / 63°0.38Rain
66 °Rain

Saint Mary, Friday, 14 August

Rain. High 66°, low 63°.

Pressure30.12 inHg
Wind15.7 mph E
Humidity95%
Visibility—
Dew point62°
Sat, 1580° / 62°0.22Light rain
80 °Light rain

Saint Mary, Saturday, 15 August

Light rain. High 80°, low 62°.

Pressure30.12 inHg
Wind14 mph SE
Humidity75%
Visibility—
Dew point66°
Sun, 1682° / 68°0.02Light rain
82 °Light rain

Saint Mary, Sunday, 16 August

Light rain. High 82°, low 68°.

Pressure30.06 inHg
Wind8.4 mph SE
Humidity73%
Visibility—
Dew point71°
Mon, 1783° / 67°0Overcast
83 °Overcast

Saint Mary, Monday, 17 August

Overcast. High 83°, low 67°.

Pressure30.06 inHg
Wind7.2 mph E
Humidity58%
Visibility—
Dew point64°
Tue, 1888° / 67°0Light rain
88 °Light rain

Saint Mary, Tuesday, 18 August

Light rain. High 88°, low 67°.

Pressure29.97 inHg
Wind11 mph SE
Humidity55%
Visibility—
Dew point64°
Wed, 19103° / 75°0Mostly clear
103 °Mostly clear

Saint Mary, Wednesday, 19 August

Mostly clear. High 103°, low 75°.

Pressure29.83 inHg
Wind13.7 mph SE
Humidity39%
Visibility—
Dew point66°
Thu, 20110° / 79°0Partly cloudy
110 °Partly cloudy

Saint Mary, Thursday, 20 August

Partly cloudy. High 110°, low 79°.

Pressure29.77 inHg
Wind13.4 mph S
Humidity31%
Visibility—
Dew point64°
Fri, 2193° / 77°0Partly cloudy
93 °Partly cloudy

Saint Mary, Friday, 21 August

Partly cloudy. High 93°, low 77°.

Pressure29.88 inHg
Wind12.3 mph E
Humidity58%
Visibility—
Dew point74°
Sat, 22102° / 75°0.03Light rain
102 °Light rain

Saint Mary, Saturday, 22 August

Light rain. High 102°, low 75°.

Pressure29.80 inHg
Wind17 mph E
Humidity32%
Visibility—
Dew point63°
Sun, 23101° / 75°0.03Light rain
101 °Light rain

Saint Mary, Sunday, 23 August

Light rain. High 101°, low 75°.

Pressure29.80 inHg
Wind13.1 mph S
Humidity36%
Visibility—
Dew point66°
Mon, 2487° / 72°0.07Light rain
87 °Light rain

Saint Mary, Monday, 24 August

Light rain. High 87°, low 72°.

Pressure30.00 inHg
Wind14.4 mph E
Humidity80%
Visibility—
Dew point71°

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 Saint Mary, 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 Saint Mary, 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.