TODAY MAR08
TEMPERATURE50
HUMIDITY48
PRESSURE30.2
WIND COND.180 18.4
  • 6646Mon
  • 7054Tue
  • 6840Wed60%30%
  • 5232Thu50%
  • 5031Fri
daynightWeather update from Grinnell Municipal Airfield at

Key findings

  • The highest monthly average temperature in Sully for July is 74 degrees
  • The lowest monthly average temperature in Sully for January is 21 degrees
  • The most monthly precipitation in Sully occurs in June with 7.8 inches
  • The air quality index in Sully is 22% better than the national average
  • The pollution index in Sully is 22% better than the national average

Compare Sully, IA Weather

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      Sully 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
      January14°F30°F21°F1.4"
      February17°F33°F24°F2.7"
      March31°F50°F39°F3.7"
      April40°F63°F50°F7.2"
      May52°F74°F62°F7.7"
      June62°F82°F72°F7.8"
      July65°F85°F74°F7.6"
      August63°F82°F72°F7.4"
      September54°F77°F64°F7.1"
      October43°F64°F53°F6.9"
      November32°F50°F40°F3.7"
      December20°F35°F27°F5.3"

      Sully 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.
      IndexSullyIowaNational
      Air quality index393950
      Pollution index3,955,0601,643,8365,066,862

      Sully air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality306
      Days with moderate air quality59
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Sully air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.002%
      Lead0.002%
      Mercury0.000%

      Average monthly Sully temperature with heat index

      Sully monthly precipitation with daily maximum

      Sully monthly snow depth with daily maximum

      Sully monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Grinnell, IA9,1123922%
      Monroe, IA1,8753922%
      Pella, IA10,2803922%
      Malcom, IA2973922%
      Kellogg, IA7773922%
      Sully, IA8433922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Shipshewana, IN8433726%
      West Middlesex, PA8434216%
      Garber, OK8434020%
      Minersville, UT8434412%
      Kiowa, CO8435816%
      Sully, IA8433922%
      Source: The Sully, 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.