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As of 00:25 MDT

Weather in Marietta, SD

75°Current weather

Marietta, Sunday, 9 August, 00:25

Clear. Feels like 74°. High 94°, low 67°.

Pressure29.83 inHg
Wind7.3 mph E
Humidity35%
Visibility6.2 mi
Dew point45°
Mon, 1099° / 66°0Clear
99 °Clear

Marietta, Monday, 10 August

Clear. High 99°, low 66°.

Pressure29.74 inHg
Wind5.1 mph SW
Humidity18%
Visibility6.2 mi
Dew point44°
Tue, 1198° / 74°0Mostly clear
98 °Mostly clear

Marietta, Tuesday, 11 August

Mostly clear. High 98°, low 74°.

Pressure29.80 inHg
Wind14.8 mph SE
Humidity30%
Visibility6.2 mi
Dew point54°
Wed, 1295° / 69°0.01Light rain
95 °Light rain

Marietta, Wednesday, 12 August

Light rain. High 95°, low 69°.

Pressure29.83 inHg
Wind12.5 mph SE
Humidity34%
Visibility6.2 mi
Dew point56°
Thu, 1371° / 62°0.06Light rain
71 °Light rain

Marietta, Thursday, 13 August

Light rain. High 71°, low 62°.

Pressure29.97 inHg
Wind26.9 mph E
Humidity81%
Visibility—
Dew point58°
Fri, 1478° / 65°0.33Rain
78 °Rain

Marietta, Friday, 14 August

Rain. High 78°, low 65°.

Pressure29.94 inHg
Wind19.7 mph E
Humidity57%
Visibility—
Dew point59°
Sat, 1586° / 64°0.01Light rain
86 °Light rain

Marietta, Saturday, 15 August

Light rain. High 86°, low 64°.

Pressure30.09 inHg
Wind16 mph E
Humidity54%
Visibility—
Dew point58°
Sun, 1688° / 67°0.41Rain
88 °Rain

Marietta, Sunday, 16 August

Rain. High 88°, low 67°.

Pressure30.00 inHg
Wind14.4 mph E
Humidity46%
Visibility—
Dew point57°
Mon, 1794° / 69°0Overcast
94 °Overcast

Marietta, Monday, 17 August

Overcast. High 94°, low 69°.

Pressure29.94 inHg
Wind19 mph E
Humidity38%
Visibility—
Dew point56°
Tue, 18100° / 69°0Overcast
100 °Overcast

Marietta, Tuesday, 18 August

Overcast. High 100°, low 69°.

Pressure29.88 inHg
Wind23.1 mph NE
Humidity28%
Visibility—
Dew point51°
Wed, 1982° / 61°0.07Light rain
82 °Light rain

Marietta, Wednesday, 19 August

Light rain. High 82°, low 61°.

Pressure30.09 inHg
Wind19.1 mph NE
Humidity53%
Visibility—
Dew point53°
Thu, 2087° / 64°0.02Light rain
87 °Light rain

Marietta, Thursday, 20 August

Light rain. High 87°, low 64°.

Pressure29.88 inHg
Wind16.1 mph E
Humidity48%
Visibility—
Dew point58°
Fri, 2188° / 68°0.04Light rain
88 °Light rain

Marietta, Friday, 21 August

Light rain. High 88°, low 68°.

Pressure29.65 inHg
Wind21.5 mph NW
Humidity29%
Visibility—
Dew point49°
Sat, 2292° / 65°0Clear
92 °Clear

Marietta, Saturday, 22 August

Clear. High 92°, low 65°.

Pressure29.80 inHg
Wind13.6 mph E
Humidity20%
Visibility—
Dew point39°
Sun, 2393° / 63°0Clear
93 °Clear

Marietta, Sunday, 23 August

Clear. High 93°, low 63°.

Pressure29.85 inHg
Wind13.1 mph E
Humidity33%
Visibility—
Dew point48°
Mon, 2498° / 72°0Clear
98 °Clear

Marietta, Monday, 24 August

Clear. High 98°, low 72°.

Pressure29.77 inHg
Wind13.9 mph NW
Humidity12%
Visibility—
Dew point34°

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, SD 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, SD 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.