TODAY NOV21
TEMPERATURE37
HUMIDITY76
PRESSURE101760
WIND COND.
  • 4326Fri
  • 4735Sat
  • 5531Sun
  • 3821Mon
  • 3521Tue
daynightWeather update from Grinnell Municipal Airfield at
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Weather Quick Facts

  • The highest monthly average temperature in Sully for July is 74.3 degrees
  • The lowest monthly average temperature in Sully for January is 21.3 degrees
  • The most monthly precipitation in Sully occurs in June with 7.8 inches
  • The air quality index in Sully is 7% better than the national average
  • The pollution index in Sully is 45% worse 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 index393942
      Pollution index3,955,0601,154,5352,726,193

      Sully air quality

      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

      Air quality details

      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

      CityPopulationAir Quality IndexNational Avg.
      Newton, IA15,1603922.0%
      Lynnville, IA5413922.0%
      Searsboro, IA1343922.0%
      Grinnell, IA9,0693922.0%
      Monroe, IA1,8103922.0%
      Sully, IA9623922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Anacoco, LA9623040.0%
      Cotton Valley, LA9623922.0%
      Alanson, MI9623628.0%
      Clarkfield, MN9623236.0%
      Schurz, NV9624118.0%
      Sully, IA9623922.0%
      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.