TODAY DEC27
TEMPERATURE39
HUMIDITY100
PRESSURE101080
WIND COND.150 16.6
  • 4536Fri50%100%
  • 4431Sat
  • 4229Sun20%
  • 4026Mon50%
  • 3120Tue20%
daynightWeather update from Decorah at
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Weather Quick Facts

  • The highest monthly average temperature in St. Lucas for July is 73 degrees
  • The lowest monthly average temperature in St. Lucas for January is 19.3 degrees
  • The most monthly precipitation in St. Lucas occurs in June with 4.3 inches
  • The air quality index in St. Lucas is 7% better than the national average
  • The pollution index in St. Lucas is 81% better than the national average

Compare St. Lucas, IA Weather

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      St. Lucas 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
      January13°F27°F19°F0.5"
      February14°F29°F21°F0.4"
      March29°F45°F36°F1.5"
      April40°F59°F48°F3.4"
      May50°F70°F60°F2.9"
      June61°F79°F69°F4.3"
      July65°F82°F73°F3.9"
      August62°F79°F70°F4.0"
      September54°F73°F63°F3.4"
      October43°F61°F51°F3.0"
      November31°F47°F38°F1.0"
      December18°F31°F24°F0.9"

      St. Lucas 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. LucasIowaNational
      Air quality index393942
      Pollution index530,4841,154,5352,726,193

      St. Lucas air quality

      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

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly St. Lucas temperature with heat index

      St. Lucas monthly precipitation with daily maximum

      St. Lucas monthly snow depth with daily maximum

      St. Lucas monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Castalia, IA1693530.0%
      Clermont, IA4823922.0%
      Protivin, IA3733922.0%
      Waucoma, IA3113922.0%
      Lawler, IA3523922.0%
      St. Lucas, IA1293922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Kansas, AL1293530.0%
      Nauvoo, AL1294118.0%
      Spaulding, CA129468.0%
      Starkville, CO1291570.0%
      Garfield, GA129476.0%
      St. Lucas, IA1293922.0%
      Source: The St. Lucas, 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.