TODAY DEC09
TEMPERATURE57
HUMIDITY83
PRESSURE29.67
WIND COND.200 17.2
  • 4823Tue70%20%
  • 3417Wed
  • 3527Thu
  • 4635Fri30%
  • 4936Sat40%60%
daynightWeather update from Parkersburg, Mid-Ohio Valley Regional Airport at
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St. Marys Average Temperature

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
January24°F42°F32°F3.4"
February25°F44°F33°F2.6"
March34°F56°F44°F3.9"
April43°F69°F56°F4.2"
May52°F76°F63°F4.1"
June60°F83°F71°F4.9"
July64°F85°F74°F4.8"
August63°F86°F73°F3.6"
September56°F80°F67°F3.2"
October45°F68°F55°F3.7"
November35°F57°F45°F2.9"
December29°F46°F37°F4.2"

Did you know?

  • The highest monthly average temperature in St. Marys for July is 74 degrees.
  • The lowest monthly average temperature in St. Marys for January is 32 degrees.
  • The most monthly precipitation in St. Marys occurs in June with 4.9 inches.
  • The air quality index in St. Marys is 34% better than the national average.
  • The pollution index in St. Marys is equal to the national average.

Compare St. Marys, WV Weather To Other Cities

St. Marys 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.
IndexSt. MarysWest VirginiaNational
Air quality index3312650
Pollution index005,066,862

St. Marys 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

St. Marys air quality information

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

Average monthly St. Marys temperature with heat index

St. Marys monthly precipitation with daily maximum

St. Marys monthly snow depth with daily maximum

St. Marys monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Matamoras, OH7743334%
Belmont, WV1,0313334%
Harrisville, WV2,2703334%
Sistersville, WV1,5653334%
Devola, OH2,5903334%
St. Marys, WV1,8013334%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Rocky Point, WA1,8011766%
Millers Creek, NC1,8012648%
Guyton, GA1,8004020%
Johnsonville, SC1,8004020%
Oberlin, KS1,8001962%
St. Marys, WV1,8013334%
Source: The St. Marys, WV 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.
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