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As of 13:40 CST

Weather in Marietta, IL

45°Current weather

Marietta, Thursday, 12 November, 13:40

Overcast. Feels like 38°. High 44°, low 39°.

Pressure30.00 inHg
Wind14.9 mph N
Humidity60%
Visibility6.2 mi
Dew point31°
Fri, 1342° / 34°0Overcast
42 °Overcast

Marietta, Friday, 13 November

Overcast. High 42°, low 34°.

Pressure30.12 inHg
Wind11.9 mph N
Humidity62%
Visibility6.2 mi
Dew point23°
Sat, 1445° / 28°0Clear
45 °Clear

Marietta, Saturday, 14 November

Clear. High 45°, low 28°.

Pressure30.33 inHg
Wind3.1 mph N
Humidity59%
Visibility6.2 mi
Dew point25°
Sun, 1548° / 27°0Partly cloudy
48 °Partly cloudy

Marietta, Sunday, 15 November

Partly cloudy. High 48°, low 27°.

Pressure30.47 inHg
Wind1.2 mph W
Humidity54%
Visibility6.2 mi
Dew point27°
Mon, 1651° / 29°0Clear
51 °Clear

Marietta, Monday, 16 November

Clear. High 51°, low 29°.

Pressure30.50 inHg
Wind4.7 mph SW
Humidity49%
Visibility6.2 mi
Dew point30°
Tue, 1754° / 31°0Clear
54 °Clear

Marietta, Tuesday, 17 November

Clear. High 54°, low 31°.

Pressure30.47 inHg
Wind6.1 mph S
Humidity48%
Visibility—
Dew point31°
Wed, 1862° / 39°0Partly cloudy
62 °Partly cloudy

Marietta, Wednesday, 18 November

Partly cloudy. High 62°, low 39°.

Pressure30.27 inHg
Wind15.5 mph S
Humidity39%
Visibility—
Dew point32°
Thu, 1967° / 47°0.11Light rain
67 °Light rain

Marietta, Thursday, 19 November

Light rain. High 67°, low 47°.

Pressure30.09 inHg
Wind19.4 mph SW
Humidity53%
Visibility—
Dew point45°
Fri, 2067° / 52°0.05Light rain
67 °Light rain

Marietta, Friday, 20 November

Light rain. High 67°, low 52°.

Pressure30.18 inHg
Wind10 mph S
Humidity62%
Visibility—
Dew point52°
Sat, 2165° / 58°0.07Light rain
65 °Light rain

Marietta, Saturday, 21 November

Light rain. High 65°, low 58°.

Pressure30.09 inHg
Wind11.6 mph S
Humidity78%
Visibility—
Dew point53°
Sun, 2260° / 56°0.67Rain
60 °Rain

Marietta, Sunday, 22 November

Rain. High 60°, low 56°.

Pressure29.77 inHg
Wind19.4 mph S
Humidity76%
Visibility—
Dew point50°
Mon, 2357° / 52°1.09Rain
57 °Rain

Marietta, Monday, 23 November

Rain. High 57°, low 52°.

Pressure29.65 inHg
Wind14.8 mph S
Humidity87%
Visibility—
Dew point49°
Tue, 2456° / 35°0.1Snow
56 °Snow

Marietta, Tuesday, 24 November

Snow. High 56°, low 35°.

Pressure29.41 inHg
Wind26.1 mph W
Humidity89%
Visibility—
Dew point38°
Wed, 2537° / 29°0Mostly clear
37 °Mostly clear

Marietta, Wednesday, 25 November

Mostly clear. High 37°, low 29°.

Pressure30.30 inHg
Wind17 mph W
Humidity55%
Visibility—
Dew point21°
Thu, 2636° / 27°0Overcast
36 °Overcast

Marietta, Thursday, 26 November

Overcast. High 36°, low 27°.

Pressure30.33 inHg
Wind13.6 mph E
Humidity53%
Visibility—
Dew point18°
Fri, 2757° / 36°1.12Snow
57 °Snow

Marietta, Friday, 27 November

Snow. High 57°, low 36°.

Pressure29.68 inHg
Wind20.9 mph SE
Humidity94%
Visibility—
Dew point43°

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.