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As of 11:48 CDT

Weather in Marietta, IL

54°Current weather

Marietta, Friday, 30 October, 11:48

Overcast. Feels like 52°. High 64°, low 50°.

Pressure30.30 inHg
Wind10.1 mph E
Humidity58%
Visibility6.2 mi
Dew point39°
Sat, 3171° / 56°0Overcast
71 °Overcast

Marietta, Saturday, 31 October

Overcast. High 71°, low 56°.

Pressure30.30 inHg
Wind5 mph SE
Humidity47%
Visibility6.2 mi
Dew point48°
Sun, 0172° / 57°0Overcast
72 °Overcast

Marietta, Sunday, 1 November

Overcast. High 72°, low 57°.

Pressure30.27 inHg
Wind10.3 mph S
Humidity57%
Visibility6.2 mi
Dew point54°
Mon, 0268° / 56°0Overcast
68 °Overcast

Marietta, Monday, 2 November

Overcast. High 68°, low 56°.

Pressure30.06 inHg
Wind13.6 mph S
Humidity74%
Visibility6.2 mi
Dew point56°
Tue, 0367° / 63°0.55Rain
67 °Rain

Marietta, Tuesday, 3 November

Rain. High 67°, low 63°.

Pressure29.83 inHg
Wind13.4 mph S
Humidity95%
Visibility—
Dew point64°
Wed, 0464° / 56°0.85Rain
64 °Rain

Marietta, Wednesday, 4 November

Rain. High 64°, low 56°.

Pressure29.68 inHg
Wind11.3 mph NW
Humidity65%
Visibility—
Dew point51°
Thu, 0562° / 54°0Overcast
62 °Overcast

Marietta, Thursday, 5 November

Overcast. High 62°, low 54°.

Pressure29.74 inHg
Wind14.7 mph N
Humidity67%
Visibility—
Dew point50°
Fri, 0655° / 51°0Overcast
55 °Overcast

Marietta, Friday, 6 November

Overcast. High 55°, low 51°.

Pressure29.94 inHg
Wind10.8 mph N
Humidity61%
Visibility—
Dew point42°
Sat, 0754° / 44°0Overcast
54 °Overcast

Marietta, Saturday, 7 November

Overcast. High 54°, low 44°.

Pressure30.12 inHg
Wind10.4 mph NE
Humidity54%
Visibility—
Dew point37°
Sun, 0850° / 40°0Overcast
50 °Overcast

Marietta, Sunday, 8 November

Overcast. High 50°, low 40°.

Pressure30.30 inHg
Wind13.3 mph E
Humidity43%
Visibility—
Dew point27°
Mon, 0945° / 41°0.15Light rain
45 °Light rain

Marietta, Monday, 9 November

Light rain. High 45°, low 41°.

Pressure30.12 inHg
Wind12.5 mph NE
Humidity61%
Visibility—
Dew point32°
Tue, 1046° / 42°0.05Light rain
46 °Light rain

Marietta, Tuesday, 10 November

Light rain. High 46°, low 42°.

Pressure29.94 inHg
Wind14 mph N
Humidity80%
Visibility—
Dew point40°
Wed, 1150° / 37°0Partly cloudy
50 °Partly cloudy

Marietta, Wednesday, 11 November

Partly cloudy. High 50°, low 37°.

Pressure30.03 inHg
Wind8.9 mph N
Humidity54%
Visibility—
Dew point31°
Thu, 1252° / 36°0Mostly clear
52 °Mostly clear

Marietta, Thursday, 12 November

Mostly clear. High 52°, low 36°.

Pressure29.88 inHg
Wind11.1 mph SE
Humidity47%
Visibility—
Dew point30°
Fri, 1353° / 42°0.52Rain
53 °Rain

Marietta, Friday, 13 November

Rain. High 53°, low 42°.

Pressure29.56 inHg
Wind16.4 mph SE
Humidity89%
Visibility—
Dew point44°
Sat, 1449° / 42°0.2Light rain
49 °Light rain

Marietta, Saturday, 14 November

Light rain. High 49°, low 42°.

Pressure29.62 inHg
Wind12.6 mph SW
Humidity91%
Visibility—
Dew point41°

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.