TODAY AUG14
TEMPERATURE77
HUMIDITY83
PRESSURE29.93
WIND COND.
  • 8064Wed60%40%
  • 8364Thu30%
  • 8264Fri50%40%
  • 8464Sat
  • 8364Sun
daynightWeather update from Grinnell Municipal Airfield at

Sully Average Weather

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"

Did you know?

  • 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 17% better than the national average.
  • The pollution index in Sully is 21% better than the national average.

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Compare Sully, IA Weather To Other Cities

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 index413950
Pollution index3,955,0601,643,8365,066,862

Sully air quality information

MeasurementTotal
Days measured365
Days with good air quality267
Days with moderate air quality98
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

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, IA9,1124118%
Oakland Acres, IA1164118%
Kellogg, IA7774118%
Monroe, IA1,8754118%
Pella, IA10,2804118%
Sully, IA8434118%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Shipshewana, IN843468%
Kiowa, CO843548%
Winfield, TN8433628%
Readlyn, IA8434314%
West Middlesex, PA8434510%
Sully, IA8434118%
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.