EN
English Español

As of 01:48 CDT

Weather in Marietta, IL

70°Current weather

Marietta, Sunday, 9 August, 01:48

Overcast. Feels like 70°. High 92°, low 69°.

Pressure29.97 inHg
Wind6.4 mph S
Humidity83%
Visibility6.2 mi
Dew point64°
Mon, 1093° / 75°0Overcast
93 °Overcast

Marietta, Monday, 10 August

Overcast. High 93°, low 75°.

Pressure29.88 inHg
Wind7.6 mph W
Humidity60%
Visibility6.2 mi
Dew point70°
Tue, 1193° / 70°0.02Light rain
93 °Light rain

Marietta, Tuesday, 11 August

Light rain. High 93°, low 70°.

Pressure29.83 inHg
Wind11.8 mph W
Humidity58%
Visibility6.2 mi
Dew point72°
Wed, 1284° / 73°0.18Rain
84 °Rain

Marietta, Wednesday, 12 August

Rain. High 84°, low 73°.

Pressure29.83 inHg
Wind7.4 mph E
Humidity86%
Visibility6.2 mi
Dew point74°
Thu, 1384° / 64°0.04Light rain
84 °Light rain

Marietta, Thursday, 13 August

Light rain. High 84°, low 64°.

Pressure29.97 inHg
Wind15.7 mph E
Humidity48%
Visibility—
Dew point60°
Fri, 1466° / 62°1.66Heavy rain
66 °Heavy rain

Marietta, Friday, 14 August

Heavy rain. High 66°, low 62°.

Pressure30.15 inHg
Wind14.9 mph E
Humidity93%
Visibility—
Dew point60°
Sat, 1574° / 61°0.21Light rain
74 °Light rain

Marietta, Saturday, 15 August

Light rain. High 74°, low 61°.

Pressure30.15 inHg
Wind12.6 mph SE
Humidity84%
Visibility—
Dew point66°
Sun, 1681° / 67°0.02Light rain
81 °Light rain

Marietta, Sunday, 16 August

Light rain. High 81°, low 67°.

Pressure30.06 inHg
Wind7.7 mph SE
Humidity74%
Visibility—
Dew point70°
Mon, 1783° / 66°0Overcast
83 °Overcast

Marietta, Monday, 17 August

Overcast. High 83°, low 66°.

Pressure30.09 inHg
Wind6.1 mph NE
Humidity62%
Visibility—
Dew point65°
Tue, 1886° / 66°0Overcast
86 °Overcast

Marietta, Tuesday, 18 August

Overcast. High 86°, low 66°.

Pressure29.97 inHg
Wind10 mph SE
Humidity55%
Visibility—
Dew point63°
Wed, 19100° / 73°0Partly cloudy
100 °Partly cloudy

Marietta, Wednesday, 19 August

Partly cloudy. High 100°, low 73°.

Pressure29.83 inHg
Wind13.3 mph SE
Humidity44%
Visibility—
Dew point68°
Thu, 20101° / 78°0Overcast
101 °Overcast

Marietta, Thursday, 20 August

Overcast. High 101°, low 78°.

Pressure29.77 inHg
Wind10.9 mph SW
Humidity39%
Visibility—
Dew point66°
Fri, 2192° / 76°0Overcast
92 °Overcast

Marietta, Friday, 21 August

Overcast. High 92°, low 76°.

Pressure29.88 inHg
Wind12.5 mph NE
Humidity59%
Visibility—
Dew point72°
Sat, 22105° / 73°0.04Light rain
105 °Light rain

Marietta, Saturday, 22 August

Light rain. High 105°, low 73°.

Pressure29.83 inHg
Wind13.9 mph N
Humidity38%
Visibility—
Dew point64°
Sun, 2396° / 79°0.02Light rain
96 °Light rain

Marietta, Sunday, 23 August

Light rain. High 96°, low 79°.

Pressure29.80 inHg
Wind16.2 mph SW
Humidity46%
Visibility—
Dew point69°
Mon, 2487° / 72°0.08Light rain
87 °Light rain

Marietta, Monday, 24 August

Light rain. High 87°, low 72°.

Pressure30.00 inHg
Wind15.4 mph E
Humidity76%
Visibility—
Dew point71°

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.