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As of 02:56 CDT

Weather in Marietta, IL

50°Current weather

Marietta, Monday, 26 October, 02:56

Overcast. Feels like 49°. High 75°, low 50°.

Pressure30.33 inHg
Wind4 mph SW
Humidity79%
Visibility6.2 mi
Dew point44°
Tue, 2773° / 49°0Overcast
73 °Overcast

Marietta, Tuesday, 27 October

Overcast. High 73°, low 49°.

Pressure30.21 inHg
Wind6.6 mph S
Humidity55%
Visibility6.2 mi
Dew point52°
Wed, 2872° / 54°0Partly cloudy
72 °Partly cloudy

Marietta, Wednesday, 28 October

Partly cloudy. High 72°, low 54°.

Pressure30.18 inHg
Wind6.5 mph S
Humidity58%
Visibility6.2 mi
Dew point52°
Thu, 2974° / 58°0.02Light rain
74 °Light rain

Marietta, Thursday, 29 October

Light rain. High 74°, low 58°.

Pressure30.09 inHg
Wind8.3 mph SW
Humidity59%
Visibility6.2 mi
Dew point56°
Fri, 3074° / 56°0Overcast
74 °Overcast

Marietta, Friday, 30 October

Overcast. High 74°, low 56°.

Pressure30.15 inHg
Wind8.8 mph S
Humidity64%
Visibility—
Dew point57°
Sat, 3164° / 55°0Light rain
64 °Light rain

Marietta, Saturday, 31 October

Light rain. High 64°, low 55°.

Pressure30.15 inHg
Wind7.6 mph NE
Humidity67%
Visibility—
Dew point52°
Sun, 0161° / 53°0.08Light rain
61 °Light rain

Marietta, Sunday, 1 November

Light rain. High 61°, low 53°.

Pressure30.03 inHg
Wind8.4 mph E
Humidity59%
Visibility—
Dew point46°
Mon, 0256° / 54°0.08Light rain
56 °Light rain

Marietta, Monday, 2 November

Light rain. High 56°, low 54°.

Pressure29.91 inHg
Wind7.8 mph N
Humidity82%
Visibility—
Dew point50°
Tue, 0363° / 47°0Overcast
63 °Overcast

Marietta, Tuesday, 3 November

Overcast. High 63°, low 47°.

Pressure30.09 inHg
Wind6.9 mph NW
Humidity44%
Visibility—
Dew point39°
Wed, 0456° / 43°0Overcast
56 °Overcast

Marietta, Wednesday, 4 November

Overcast. High 56°, low 43°.

Pressure30.27 inHg
Wind13.8 mph NE
Humidity52%
Visibility—
Dew point37°
Thu, 0552° / 39°0Overcast
52 °Overcast

Marietta, Thursday, 5 November

Overcast. High 52°, low 39°.

Pressure30.47 inHg
Wind11.3 mph E
Humidity43%
Visibility—
Dew point27°
Fri, 0656° / 37°0Partly cloudy
56 °Partly cloudy

Marietta, Friday, 6 November

Partly cloudy. High 56°, low 37°.

Pressure30.18 inHg
Wind15.4 mph S
Humidity32%
Visibility—
Dew point23°
Sat, 0757° / 48°0.37Rain
57 °Rain

Marietta, Saturday, 7 November

Rain. High 57°, low 48°.

Pressure29.85 inHg
Wind16.7 mph S
Humidity85%
Visibility—
Dew point47°
Sun, 0857° / 41°0.03Light rain
57 °Light rain

Marietta, Sunday, 8 November

Light rain. High 57°, low 41°.

Pressure30.21 inHg
Wind18.1 mph NW
Humidity56%
Visibility—
Dew point35°
Mon, 0954° / 35°0Mostly clear
54 °Mostly clear

Marietta, Monday, 9 November

Mostly clear. High 54°, low 35°.

Pressure30.33 inHg
Wind10.9 mph S
Humidity45%
Visibility—
Dew point28°
Tue, 1059° / 52°0.01Light rain
59 °Light rain

Marietta, Tuesday, 10 November

Light rain. High 59°, low 52°.

Pressure29.88 inHg
Wind12.8 mph S
Humidity65%
Visibility—
Dew point47°

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 Marietta, 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 Marietta, 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.