TODAY FEB28
TEMPERATURE39
HUMIDITY100
PRESSURE29.71
WIND COND.220 16.6
  • 3113Mon
  • 4127Tue
  • 4426Wed
  • 4626Thu
  • 4423Fri
daynightWeather update from Monticello Municipal at

Key findings

  • The highest monthly average temperature in Delaware for July is 72 degrees
  • The lowest monthly average temperature in Delaware for January is 19 degrees
  • The most monthly precipitation in Delaware occurs in July with 6.9 inches
  • The air quality index in Delaware is 22% better than the national average
  • The pollution index in Delaware is 88% better than the national average

Compare Delaware, IA Weather

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      Delaware 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
      January10°F29°F19°F1.4"
      February12°F32°F22°F1.9"
      March25°F47°F36°F2.3"
      April36°F62°F49°F4.9"
      May47°F72°F59°F4.5"
      June58°F81°F69°F5.3"
      July61°F84°F72°F6.9"
      August59°F81°F70°F4.2"
      September51°F76°F63°F3.2"
      October40°F63°F51°F3.4"
      November28°F49°F38°F2.2"
      December15°F33°F24°F2.5"

      Delaware 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.
      IndexDelawareIowaNational
      Air quality index393950
      Pollution index586,1751,643,8365,066,862

      Delaware air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality287
      Days with moderate air quality78
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Delaware air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.090%
      Mercury0.000%

      Average monthly Delaware temperature with heat index

      Delaware monthly precipitation with daily maximum

      Delaware monthly snow depth with daily maximum

      Delaware monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Edgewood, IA7952942%
      Dyersville, IA4,1802942%
      Worthington, IA4202942%
      New Vienna, IA3812942%
      Greeley, IA2792942%
      Delaware, IA1333922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Kendall, WA1333432%
      Heckscherville, PA1334216%
      Loco, OK1334314%
      Dayville, OR1332354%
      Derby, IA1333922%
      Delaware, IA1333922%
      Source: The Delaware, 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.