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As of 11:03 EDT

Weather in Old Saint Louis, IN

82°Current weather

Old Saint Louis, Sunday, 9 August, 11:03

Partly cloudy. Feels like 88°. High 93°, low 70°.

Pressure30.06 inHg
Wind7.1 mph S
Humidity80%
Visibility6.2 mi
Dew point75°
Mon, 1096° / 73°0.05Rain
96 °Rain

Old Saint Louis, Monday, 10 August

Rain. High 96°, low 73°.

Pressure30.00 inHg
Wind12.4 mph SW
Humidity63%
Visibility6.2 mi
Dew point72°
Tue, 1194° / 68°0.01Light rain
94 °Light rain

Old Saint Louis, Tuesday, 11 August

Light rain. High 94°, low 68°.

Pressure29.94 inHg
Wind10.5 mph S
Humidity70%
Visibility6.2 mi
Dew point72°
Wed, 1291° / 74°0.1Light rain
91 °Light rain

Old Saint Louis, Wednesday, 12 August

Light rain. High 91°, low 74°.

Pressure29.85 inHg
Wind13.6 mph W
Humidity78%
Visibility6.2 mi
Dew point74°
Thu, 1379° / 68°0.2Light rain
79 °Light rain

Old Saint Louis, Thursday, 13 August

Light rain. High 79°, low 68°.

Pressure29.94 inHg
Wind9.3 mph E
Humidity73%
Visibility—
Dew point66°
Fri, 1476° / 66°0.89Heavy rain
76 °Heavy rain

Old Saint Louis, Friday, 14 August

Heavy rain. High 76°, low 66°.

Pressure30.06 inHg
Wind10.4 mph E
Humidity93%
Visibility—
Dew point68°
Sat, 1578° / 61°0.17Light rain
78 °Light rain

Old Saint Louis, Saturday, 15 August

Light rain. High 78°, low 61°.

Pressure30.24 inHg
Wind11.8 mph E
Humidity78%
Visibility—
Dew point63°
Sun, 1693° / 65°0Overcast
93 °Overcast

Old Saint Louis, Sunday, 16 August

Overcast. High 93°, low 65°.

Pressure29.94 inHg
Wind14.1 mph NW
Humidity48%
Visibility—
Dew point67°
Mon, 1777° / 65°0Partly cloudy
77 °Partly cloudy

Old Saint Louis, Monday, 17 August

Partly cloudy. High 77°, low 65°.

Pressure30.06 inHg
Wind10.9 mph N
Humidity60%
Visibility—
Dew point60°
Tue, 1882° / 63°0.01Light rain
82 °Light rain

Old Saint Louis, Tuesday, 18 August

Light rain. High 82°, low 63°.

Pressure29.91 inHg
Wind7.2 mph SE
Humidity57%
Visibility—
Dew point61°
Wed, 1986° / 66°0.3Rain
86 °Rain

Old Saint Louis, Wednesday, 19 August

Rain. High 86°, low 66°.

Pressure29.77 inHg
Wind14.2 mph NW
Humidity63%
Visibility—
Dew point69°
Thu, 2075° / 59°0Overcast
75 °Overcast

Old Saint Louis, Thursday, 20 August

Overcast. High 75°, low 59°.

Pressure29.94 inHg
Wind10.5 mph N
Humidity56%
Visibility—
Dew point56°
Fri, 2183° / 59°0Mostly clear
83 °Mostly clear

Old Saint Louis, Friday, 21 August

Mostly clear. High 83°, low 59°.

Pressure29.91 inHg
Wind8.7 mph S
Humidity52%
Visibility—
Dew point58°
Sat, 2288° / 65°0.35Rain
88 °Rain

Old Saint Louis, Saturday, 22 August

Rain. High 88°, low 65°.

Pressure29.80 inHg
Wind17.2 mph S
Humidity61%
Visibility—
Dew point68°
Sun, 2375° / 60°0Clear
75 °Clear

Old Saint Louis, Sunday, 23 August

Clear. High 75°, low 60°.

Pressure30.12 inHg
Wind11.9 mph N
Humidity53%
Visibility—
Dew point55°
Mon, 2477° / 57°0Clear
77 °Clear

Old Saint Louis, Monday, 24 August

Clear. High 77°, low 57°.

Pressure30.21 inHg
Wind8.9 mph NE
Humidity47%
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 Old Saint Louis, IN 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 Old Saint Louis, IN 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.