TODAY MAR29
TEMPERATURE45
HUMIDITY61
PRESSURE101460
WIND COND.250 11.2
  • 6254Sat20%
  • 6552Sun50%
  • 6053Mon60%70%
  • 6854Tue70%70%
  • 5742Wed70%60%
daynightWeather update from St Marys County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Cobb Island for July is 79.2 degrees
  • The lowest monthly average temperature in Cobb Island for January is 37.4 degrees
  • The most monthly precipitation in Cobb Island occurs in October with 6.2 inches
  • The air quality index in Cobb Island is 12% worse than the national average
  • The pollution index in Cobb Island is 86% better than the national average

Compare Cobb Island, MD Weather

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      Cobb Island 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
      January29°F46°F37°F2.6"
      February29°F48°F38°F2.4"
      March37°F56°F46°F3.4"
      April47°F68°F57°F4.0"
      May57°F75°F66°F4.0"
      June66°F84°F75°F4.9"
      July71°F88°F79°F3.9"
      August69°F86°F77°F5.1"
      September63°F80°F71°F4.1"
      October52°F70°F61°F6.2"
      November41°F59°F50°F3.2"
      December33°F51°F42°F3.7"

      Cobb Island 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.
      IndexCobb IslandMarylandNational
      Air quality index474342
      Pollution index384,1335,342,3672,726,193

      Cobb Island air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality209
      Days with moderate air quality145
      Days w/ poor A.Q. for sensitive groups10
      Days with unhealthy air quality1

      Cobb Island air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.003%
      Mercury0.000%

      Average monthly Cobb Island temperature with heat index

      Cobb Island monthly precipitation with daily maximum

      Cobb Island monthly snow depth with daily maximum

      Cobb Island monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Leonardtown, MD3,7954118.0%
      Montross, VA5534118.0%
      Mechanicsville, MD1,724476.0%
      Potomac Mills, VA6,826476.0%
      Rock Point, MD63476.0%
      Cobb Island, MD1,119476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      North DeLand, FL1,1193726.0%
      Parkers Prairie, MN1,1192942.0%
      Twin Lakes, NM1,1191766.0%
      Springmont, PA1,1194216.0%
      Sainte-Marthe, QC1,119n/a 
      Cobb Island, MD1,119476.0%
      Source: The Cobb Island, MD 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.