TODAY MAR29
TEMPERATURE36
HUMIDITY69
PRESSURE101360
WIND COND.110 16.6
  • 6030Fri
  • 5031Sat
  • 5237Sun40%50%
  • 4828Mon70%60%
  • 4928Tue
daynightWeather update from Algona at
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Weather Quick Facts

  • The highest monthly average temperature in St. Joseph for July is 74.6 degrees
  • The lowest monthly average temperature in St. Joseph for January is 18.7 degrees
  • The most monthly precipitation in St. Joseph occurs in August with 17.3 inches
  • The air quality index in St. Joseph is 64% better than the national average
  • The pollution index in St. Joseph is 84% better than the national average

Compare St. Joseph, IA Weather

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      St. Joseph 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
      January11°F29°F19°F0.5"
      February15°F32°F22°F3.0"
      March29°F50°F37°F2.2"
      April39°F63°F50°F7.2"
      May51°F74°F61°F8.1"
      June62°F84°F72°F8.2"
      July64°F87°F75°F9.1"
      August63°F83°F72°F17.3"
      September56°F81°F66°F7.3"
      October44°F68°F53°F4.4"
      November29°F51°F37°F4.8"
      December12°F27°F19°F3.9"

      St. Joseph 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.
      IndexSt. JosephIowaNational
      Air quality index153942
      Pollution index426,6161,154,5352,726,193

      St. Joseph air quality information

      MeasurementTotal
      Days measured118
      Days with good air quality118
      Days with moderate air quality0
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      St. Joseph air quality information

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

      Average monthly St. Joseph temperature with heat index

      St. Joseph monthly precipitation with daily maximum

      St. Joseph monthly snow depth with daily maximum

      St. Joseph monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      St. Benedict, IA241570.0%
      Ottosen, IA161570.0%
      Corwith, IA2221570.0%
      Algona, IA5,4151570.0%
      Sexton, IA01570.0%
      St. Joseph, IA1221570.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Nunam Iqua, AK1223138.0%
      Pollard, AL1224118.0%
      Pineville, AR1223628.0%
      Whispering Pines, AZ1226020.0%
      Gay, GA1224216.0%
      St. Joseph, IA1221570.0%
      Source: The St. Joseph, 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.