TODAY JUN18
TEMPERATURE77
HUMIDITY77
PRESSURE30.13
WIND COND.
  • 8870Tue40%70%
  • 8464Wed60%70%
  • 8364Thu
  • 8366Fri40%50%
  • 8367Sat50%60%
daynightWeather update from Parkersburg, Mid-Ohio Valley Regional Airport at

Marietta Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January-15°F71°F32°F3.6"
February-8°F68°F30°F1.7"
March7°F79°F41°F3.4"
April19°F87°F53°F3.2"
May28°F90°F60°F3.0"
June42°F95°F70°F3.9"
July46°F95°F72°F3.7"
August44°F95°F73°F3.7"
September37°F92°F65°F2.6"
October25°F88°F53°F3.3"
November12°F74°F44°F2.1"
December1°F72°F34°F2.5"

Did you know?

  • The highest monthly average temperature in Marietta for August is 73 degrees.
  • The lowest monthly average temperature in Marietta for February is 30 degrees.
  • The most monthly precipitation in Marietta occurs in June with 3.9 inches.
  • The air quality index in Marietta is 33% better than the national average.
  • The pollution index in Marietta is 44% better than the national average.

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Compare Marietta, OH Weather To Other Cities

Marietta air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexMariettaOhioNational
Air quality index334050
Pollution index2,805,7406,740,0015,066,862

Marietta air quality information

MeasurementTotal
Days measured365
Days with good air quality330
Days with moderate air quality35
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Marietta air quality information

PollutantTotal
Arsenic0.010%
Benzene0.020%
Carbon Tetrachloride0.005%
Lead0.060%
Mercury0.010%

Average monthly Marietta temperature with heat index

Marietta monthly precipitation with daily maximum

Marietta monthly snow depth with daily maximum

Marietta monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Beverly, OH1,2553334%
Lower Salem, OH893334%
Reno, OH1,0663334%
Blennerhassett, WV2,8793334%
Parkersburg, WV30,9623334%
Marietta, OH13,9123334%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Chesterton, IN13,9123138%
Hayden, ID13,9163922%
Wood Dale, IL13,9086020%
New Cassel, NY13,922536%
Hazel Crest, IL13,9246020%
Marietta, OH13,9123334%
Source: The Marietta, OH weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.