TODAY MAY14
TEMPERATURE46
HUMIDITY87
PRESSURE30.27
WIND COND.110 14.8
  • 5046Sat80%70%
  • 4639Sun70%40%
  • 4839Mon40%
  • 5142Tue
  • 5142Wed
daynightWeather update from Ketchikan, Ketchikan International Airport at

Key findings

  • The highest monthly average temperature in Ketchikan for August is 58.7 degrees
  • The lowest monthly average temperature in Ketchikan for December is 35.4 degrees
  • The most monthly precipitation in Ketchikan occurs in October with 20.2 inches
  • The air quality index in Ketchikan is 60% better than the national average
  • The pollution index in Ketchikan is 91% better than the national average

Compare Ketchikan, AK Weather

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      Ketchikan 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
      January32°F41°F37°F18.0"
      February31°F42°F36°F13.3"
      March32°F44°F38°F13.5"
      April37°F50°F43°F12.0"
      May43°F58°F50°F8.8"
      June49°F63°F55°F7.3"
      July53°F65°F58°F9.2"
      August53°F66°F59°F11.4"
      September49°F60°F54°F16.1"
      October42°F52°F46°F20.2"
      November35°F43°F39°F16.0"
      December31°F40°F35°F14.5"

      Ketchikan 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.
      IndexKetchikanAlaskaNational
      Air quality index203050
      Pollution index441,73311,990,2865,066,862

      Ketchikan air quality information

      MeasurementTotal
      Days measured362
      Days with good air quality308
      Days with moderate air quality51
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Ketchikan air quality information

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

      Average monthly Ketchikan temperature with heat index

      Ketchikan monthly precipitation with daily maximum

      Ketchikan monthly snow depth with daily maximum

      Ketchikan monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Saxman, AK4222060%
      Ketchikan, AK8,1892060%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Wynne, AR8,1954510%
      Aransas Pass, TX8,1804216%
      Garden City Park, NY8,179512%
      Firebaugh, CA8,17650= 100
      Hillsdale, MI8,2033922%
      Ketchikan, AK8,1892060%
      Source: The Ketchikan, AK 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.