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As of 08:42 CDT

Weather in Marietta, IL

48°Current weather

Marietta, Sunday, 25 October, 08:42

Overcast. Feels like 46°. High 74°, low 48°.

Pressure30.42 inHg
Wind5.1 mph S
Humidity79%
Visibility6.2 mi
Dew point42°
Mon, 2674° / 51°0Overcast
74 °Overcast

Marietta, Monday, 26 October

Overcast. High 74°, low 51°.

Pressure30.30 inHg
Wind2.3 mph SE
Humidity54%
Visibility6.2 mi
Dew point53°
Tue, 2770° / 52°0Overcast
70 °Overcast

Marietta, Tuesday, 27 October

Overcast. High 70°, low 52°.

Pressure30.24 inHg
Wind7.2 mph S
Humidity58%
Visibility6.2 mi
Dew point52°
Wed, 2873° / 53°0.03Light rain
73 °Light rain

Marietta, Wednesday, 28 October

Light rain. High 73°, low 53°.

Pressure30.18 inHg
Wind7.9 mph S
Humidity58%
Visibility6.2 mi
Dew point54°
Thu, 2975° / 59°0Overcast
75 °Overcast

Marietta, Thursday, 29 October

Overcast. High 75°, low 59°.

Pressure30.09 inHg
Wind10.2 mph SW
Humidity57%
Visibility—
Dew point56°
Fri, 3067° / 53°0Overcast
67 °Overcast

Marietta, Friday, 30 October

Overcast. High 67°, low 53°.

Pressure30.24 inHg
Wind7 mph E
Humidity71%
Visibility—
Dew point55°
Sat, 3165° / 57°0.3Rain
65 °Rain

Marietta, Saturday, 31 October

Rain. High 65°, low 57°.

Pressure30.09 inHg
Wind10.7 mph S
Humidity59%
Visibility—
Dew point50°
Sun, 0168° / 59°0.22Light rain
68 °Light rain

Marietta, Sunday, 1 November

Light rain. High 68°, low 59°.

Pressure30.03 inHg
Wind12 mph S
Humidity70%
Visibility—
Dew point56°
Mon, 0272° / 56°0.02Light rain
72 °Light rain

Marietta, Monday, 2 November

Light rain. High 72°, low 56°.

Pressure29.94 inHg
Wind18.2 mph S
Humidity58%
Visibility—
Dew point53°
Tue, 0368° / 55°0.05Light rain
68 °Light rain

Marietta, Tuesday, 3 November

Light rain. High 68°, low 55°.

Pressure29.85 inHg
Wind15.8 mph S
Humidity51%
Visibility—
Dew point49°
Wed, 0461° / 47°0Clear
61 °Clear

Marietta, Wednesday, 4 November

Clear. High 61°, low 47°.

Pressure29.85 inHg
Wind17.7 mph W
Humidity32%
Visibility—
Dew point29°
Thu, 0557° / 46°0Overcast
57 °Overcast

Marietta, Thursday, 5 November

Overcast. High 57°, low 46°.

Pressure29.83 inHg
Wind10 mph W
Humidity55%
Visibility—
Dew point40°
Fri, 0657° / 42°0Clear
57 °Clear

Marietta, Friday, 6 November

Clear. High 57°, low 42°.

Pressure29.83 inHg
Wind10.5 mph NW
Humidity55%
Visibility—
Dew point39°
Sat, 0766° / 44°0.02Light rain
66 °Light rain

Marietta, Saturday, 7 November

Light rain. High 66°, low 44°.

Pressure29.62 inHg
Wind17.9 mph SE
Humidity44%
Visibility—
Dew point39°
Sun, 0857° / 47°0.08Light rain
57 °Light rain

Marietta, Sunday, 8 November

Light rain. High 57°, low 47°.

Pressure29.47 inHg
Wind20.5 mph W
Humidity60%
Visibility—
Dew point42°
Mon, 0952° / 44°0.02Light rain
52 °Light rain

Marietta, Monday, 9 November

Light rain. High 52°, low 44°.

Pressure30.00 inHg
Wind22.1 mph NW
Humidity55%
Visibility—
Dew point35°

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.