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As of 16:32 CDT

Weather in Marietta, IL

76°Current weather

Marietta, Thursday, 22 October, 16:32

Clear. Feels like 76°. High 76°, low 47°.

Pressure30.21 inHg
Wind1.6 mph SE
Humidity48%
Visibility6.2 mi
Dew point55°
Fri, 2375° / 48°0Clear
75 °Clear

Marietta, Friday, 23 October

Clear. High 75°, low 48°.

Pressure30.27 inHg
Wind6.9 mph S
Humidity50%
Visibility6.2 mi
Dew point50°
Sat, 2471° / 48°0Overcast
71 °Overcast

Marietta, Saturday, 24 October

Overcast. High 71°, low 48°.

Pressure30.33 inHg
Wind7.6 mph S
Humidity53%
Visibility6.2 mi
Dew point50°
Sun, 2574° / 50°0Overcast
74 °Overcast

Marietta, Sunday, 25 October

Overcast. High 74°, low 50°.

Pressure30.39 inHg
Wind4.1 mph S
Humidity52%
Visibility6.2 mi
Dew point51°
Mon, 2671° / 50°0Overcast
71 °Overcast

Marietta, Monday, 26 October

Overcast. High 71°, low 50°.

Pressure30.36 inHg
Wind2.7 mph E
Humidity59%
Visibility6.2 mi
Dew point52°
Tue, 2770° / 50°0Overcast
70 °Overcast

Marietta, Tuesday, 27 October

Overcast. High 70°, low 50°.

Pressure30.27 inHg
Wind8 mph E
Humidity55%
Visibility—
Dew point49°
Wed, 2863° / 51°0Clear
63 °Clear

Marietta, Wednesday, 28 October

Clear. High 63°, low 51°.

Pressure30.15 inHg
Wind6.8 mph SW
Humidity57%
Visibility—
Dew point44°
Thu, 2963° / 52°0.15Light rain
63 °Light rain

Marietta, Thursday, 29 October

Light rain. High 63°, low 52°.

Pressure30.12 inHg
Wind8.4 mph S
Humidity55%
Visibility—
Dew point45°
Fri, 3060° / 50°0.17Light rain
60 °Light rain

Marietta, Friday, 30 October

Light rain. High 60°, low 50°.

Pressure29.97 inHg
Wind11.9 mph N
Humidity93%
Visibility—
Dew point57°
Sat, 3158° / 44°0Overcast
58 °Overcast

Marietta, Saturday, 31 October

Overcast. High 58°, low 44°.

Pressure30.12 inHg
Wind9 mph N
Humidity58%
Visibility—
Dew point41°
Sun, 0155° / 50°0Overcast
55 °Overcast

Marietta, Sunday, 1 November

Overcast. High 55°, low 50°.

Pressure30.06 inHg
Wind11.7 mph NE
Humidity57%
Visibility—
Dew point40°
Mon, 0258° / 43°0Partly cloudy
58 °Partly cloudy

Marietta, Monday, 2 November

Partly cloudy. High 58°, low 43°.

Pressure30.18 inHg
Wind7.6 mph N
Humidity40%
Visibility—
Dew point31°
Tue, 0357° / 41°0Overcast
57 °Overcast

Marietta, Tuesday, 3 November

Overcast. High 57°, low 41°.

Pressure30.39 inHg
Wind5.4 mph E
Humidity52%
Visibility—
Dew point37°
Wed, 0459° / 46°0Overcast
59 °Overcast

Marietta, Wednesday, 4 November

Overcast. High 59°, low 46°.

Pressure30.50 inHg
Wind6 mph NE
Humidity43%
Visibility—
Dew point34°
Thu, 0556° / 42°0Overcast
56 °Overcast

Marietta, Thursday, 5 November

Overcast. High 56°, low 42°.

Pressure30.47 inHg
Wind5.7 mph E
Humidity39%
Visibility—
Dew point30°
Fri, 0658° / 51°0Overcast
58 °Overcast

Marietta, Friday, 6 November

Overcast. High 58°, low 51°.

Pressure30.21 inHg
Wind5.5 mph SE
Humidity39%
Visibility—
Dew point31°

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.