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As of 07:34 CDT

Weather in Marietta, IL

41°Current weather

Marietta, Wednesday, 21 October, 07:34

Clear. Feels like 41°. High 75°, low 41°.

Pressure30.27 inHg
Wind2.4 mph S
Humidity88%
Visibility6.2 mi
Dew point38°
Thu, 2276° / 48°0Clear
76 °Clear

Marietta, Thursday, 22 October

Clear. High 76°, low 48°.

Pressure30.27 inHg
Wind2.1 mph E
Humidity48%
Visibility6.2 mi
Dew point50°
Fri, 2372° / 51°0Clear
72 °Clear

Marietta, Friday, 23 October

Clear. High 72°, low 51°.

Pressure30.30 inHg
Wind6.6 mph S
Humidity52%
Visibility6.2 mi
Dew point51°
Sat, 2470° / 52°0Overcast
70 °Overcast

Marietta, Saturday, 24 October

Overcast. High 70°, low 52°.

Pressure30.33 inHg
Wind8.4 mph S
Humidity53%
Visibility6.2 mi
Dew point51°
Sun, 2574° / 53°0Overcast
74 °Overcast

Marietta, Sunday, 25 October

Overcast. High 74°, low 53°.

Pressure30.33 inHg
Wind6 mph S
Humidity46%
Visibility—
Dew point48°
Mon, 2673° / 54°0Overcast
73 °Overcast

Marietta, Monday, 26 October

Overcast. High 73°, low 54°.

Pressure30.21 inHg
Wind7 mph S
Humidity41%
Visibility—
Dew point46°
Tue, 2761° / 54°0.12Light rain
61 °Light rain

Marietta, Tuesday, 27 October

Light rain. High 61°, low 54°.

Pressure30.21 inHg
Wind9 mph N
Humidity89%
Visibility—
Dew point51°
Wed, 2861° / 53°0.15Light rain
61 °Light rain

Marietta, Wednesday, 28 October

Light rain. High 61°, low 53°.

Pressure30.12 inHg
Wind18.9 mph W
Humidity80%
Visibility—
Dew point51°
Thu, 2951° / 42°0Overcast
51 °Overcast

Marietta, Thursday, 29 October

Overcast. High 51°, low 42°.

Pressure30.30 inHg
Wind16.9 mph NW
Humidity60%
Visibility—
Dew point33°
Fri, 3055° / 40°0Overcast
55 °Overcast

Marietta, Friday, 30 October

Overcast. High 55°, low 40°.

Pressure30.33 inHg
Wind6.9 mph E
Humidity43%
Visibility—
Dew point30°
Sat, 3153° / 40°0.01Light rain
53 °Light rain

Marietta, Saturday, 31 October

Light rain. High 53°, low 40°.

Pressure30.21 inHg
Wind14.8 mph SE
Humidity43%
Visibility—
Dew point28°
Sun, 0154° / 47°0.65Rain
54 °Rain

Marietta, Sunday, 1 November

Rain. High 54°, low 47°.

Pressure29.97 inHg
Wind11 mph SE
Humidity97%
Visibility—
Dew point51°
Mon, 0257° / 55°0.16Light rain
57 °Light rain

Marietta, Monday, 2 November

Light rain. High 57°, low 55°.

Pressure29.97 inHg
Wind7.3 mph N
Humidity95%
Visibility—
Dew point53°
Tue, 0366° / 54°0.02Light rain
66 °Light rain

Marietta, Tuesday, 3 November

Light rain. High 66°, low 54°.

Pressure29.91 inHg
Wind14.9 mph E
Humidity62%
Visibility—
Dew point50°
Wed, 0467° / 60°1Heavy rain
67 °Heavy rain

Marietta, Wednesday, 4 November

Heavy rain. High 67°, low 60°.

Pressure29.68 inHg
Wind19 mph S
Humidity95%
Visibility—
Dew point63°
Thu, 0568° / 57°0Overcast
68 °Overcast

Marietta, Thursday, 5 November

Overcast. High 68°, low 57°.

Pressure29.88 inHg
Wind15.8 mph SW
Humidity53%
Visibility—
Dew point49°

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.