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As of 04:21 CDT

Weather in Marietta, IL

47°Current weather

Marietta, Friday, 23 October, 04:21

Clear. Feels like 45°. High 75°, low 47°.

Pressure30.24 inHg
Wind4.2 mph E
Humidity87%
Visibility6.2 mi
Dew point44°
Sat, 2475° / 49°0Overcast
75 °Overcast

Marietta, Saturday, 24 October

Overcast. High 75°, low 49°.

Pressure30.33 inHg
Wind7.8 mph S
Humidity49%
Visibility6.2 mi
Dew point49°
Sun, 2576° / 51°0Mostly clear
76 °Mostly clear

Marietta, Sunday, 25 October

Mostly clear. High 76°, low 51°.

Pressure30.36 inHg
Wind4.3 mph S
Humidity50%
Visibility6.2 mi
Dew point51°
Mon, 2673° / 52°0Overcast
73 °Overcast

Marietta, Monday, 26 October

Overcast. High 73°, low 52°.

Pressure30.33 inHg
Wind2.9 mph SE
Humidity58%
Visibility6.2 mi
Dew point53°
Tue, 2771° / 52°0Overcast
71 °Overcast

Marietta, Tuesday, 27 October

Overcast. High 71°, low 52°.

Pressure30.21 inHg
Wind6.6 mph E
Humidity61%
Visibility—
Dew point51°
Wed, 2874° / 55°0.02Light rain
74 °Light rain

Marietta, Wednesday, 28 October

Light rain. High 74°, low 55°.

Pressure30.00 inHg
Wind13.6 mph SW
Humidity42%
Visibility—
Dew point46°
Thu, 2976° / 60°0Overcast
76 °Overcast

Marietta, Thursday, 29 October

Overcast. High 76°, low 60°.

Pressure30.09 inHg
Wind13.6 mph S
Humidity33%
Visibility—
Dew point43°
Fri, 3064° / 57°1Rain
64 °Rain

Marietta, Friday, 30 October

Rain. High 64°, low 57°.

Pressure30.00 inHg
Wind16.8 mph S
Humidity94%
Visibility—
Dew point56°
Sat, 3160° / 51°0.13Light rain
60 °Light rain

Marietta, Saturday, 31 October

Light rain. High 60°, low 51°.

Pressure29.91 inHg
Wind14.3 mph S
Humidity87%
Visibility—
Dew point54°
Sun, 0151° / 43°0.07Light rain
51 °Light rain

Marietta, Sunday, 1 November

Light rain. High 51°, low 43°.

Pressure30.03 inHg
Wind15.6 mph W
Humidity75%
Visibility—
Dew point42°
Mon, 0251° / 41°0Overcast
51 °Overcast

Marietta, Monday, 2 November

Overcast. High 51°, low 41°.

Pressure30.21 inHg
Wind16.2 mph NW
Humidity52%
Visibility—
Dew point31°
Tue, 0355° / 36°0Clear
55 °Clear

Marietta, Tuesday, 3 November

Clear. High 55°, low 36°.

Pressure30.30 inHg
Wind9.5 mph NW
Humidity48%
Visibility—
Dew point32°
Wed, 0457° / 38°0Clear
57 °Clear

Marietta, Wednesday, 4 November

Clear. High 57°, low 38°.

Pressure30.27 inHg
Wind8.9 mph NW
Humidity40%
Visibility—
Dew point30°
Thu, 0560° / 41°0Clear
60 °Clear

Marietta, Thursday, 5 November

Clear. High 60°, low 41°.

Pressure30.24 inHg
Wind9.6 mph SW
Humidity41%
Visibility—
Dew point33°
Fri, 0660° / 43°0Overcast
60 °Overcast

Marietta, Friday, 6 November

Overcast. High 60°, low 43°.

Pressure30.12 inHg
Wind11.9 mph SW
Humidity41%
Visibility—
Dew point32°
Sat, 0758° / 44°0Overcast
58 °Overcast

Marietta, Saturday, 7 November

Overcast. High 58°, low 44°.

Pressure30.09 inHg
Wind5.7 mph S
Humidity44%
Visibility—
Dew point33°

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.