TODAY MAR01
TEMPERATURE41
HUMIDITY65
PRESSURE29.72
WIND COND.150 20.5
  • 4725Tue
  • 4624Wed
  • 4726Thu
  • 4625Fri
  • 4729Sat
daynightWeather update from Marshalltown, Marshalltown Municipal Airport at

Key findings

  • The highest monthly average temperature in Garwin for July is 74 degrees
  • The lowest monthly average temperature in Garwin for January is 20 degrees
  • The most monthly precipitation in Garwin occurs in May with 5.8 inches
  • The air quality index in Garwin is 22% better than the national average
  • The pollution index in Garwin is 92% better than the national average

Compare Garwin, IA Weather

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      Garwin 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
      January12°F29°F20°F0.6"
      February13°F32°F22°F0.8"
      March28°F48°F37°F1.7"
      April39°F62°F49°F4.8"
      May50°F73°F61°F5.8"
      June60°F82°F71°F5.1"
      July63°F84°F74°F4.0"
      August61°F82°F71°F4.9"
      September52°F77°F64°F3.9"
      October41°F63°F51°F2.9"
      November29°F49°F38°F1.5"
      December16°F33°F24°F1.4"

      Garwin 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.
      IndexGarwinIowaNational
      Air quality index393950
      Pollution index416,1141,643,8365,066,862

      Garwin air quality information

      MeasurementTotal
      Days measured363
      Days with good air quality286
      Days with moderate air quality77
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Garwin air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.004%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly Garwin temperature with heat index

      Garwin monthly precipitation with daily maximum

      Garwin monthly snow depth with daily maximum

      Garwin monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Gilman, IA5983726%
      Laurel, IA3583726%
      Ferguson, IA1373726%
      Haverhill, IA1693726%
      Marshalltown, IA27,6373726%
      Garwin, IA5033922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Malone, WA5033040%
      Jacksonboro, SC5032942%
      Fillmore, NY5033922%
      Toksook Bay, AK5033138%
      Mooresboro, NC5033628%
      Garwin, IA5033922%
      Source: The Garwin, IA 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.