TODAY NOV21
TEMPERATURE48
HUMIDITY86
PRESSURE101190
WIND COND.100 11.2
  • 5644Fri100%90%
  • 5243Sat100%100%
  • 5243Sun90%
  • 5142Mon
  • 5042Tue
daynightWeather update from Astoria, Astoria Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Seaside for August is 60.9 degrees
  • The lowest monthly average temperature in Seaside for December is 42.4 degrees
  • The most monthly precipitation in Seaside occurs in November with 12.7 inches
  • The air quality index in Seaside is 57% better than the national average
  • The pollution index in Seaside is 36% better than the national average

Compare Seaside, OR Weather

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      Seaside 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
      January36°F51°F43°F10.5"
      February37°F53°F44°F6.7"
      March39°F55°F46°F9.5"
      April40°F57°F49°F6.0"
      May45°F63°F53°F4.1"
      June50°F66°F57°F2.4"
      July53°F69°F60°F1.0"
      August53°F71°F61°F0.8"
      September50°F70°F59°F3.3"
      October45°F63°F53°F7.4"
      November40°F55°F47°F12.7"
      December36°F49°F42°F11.3"

      Seaside 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.
      IndexSeasideOregonNational
      Air quality index183242
      Pollution index1,735,0907,156,3562,726,193

      Seaside air quality

      MeasurementTotal
      Days measured360
      Days with good air quality338
      Days with moderate air quality22
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.010%
      Benzene0.020%
      Carbon Tetrachloride0.010%
      Lead0.010%
      Mercury0.002%

      Average monthly Seaside temperature with heat index

      Seaside monthly precipitation with daily maximum

      Seaside monthly snow depth with daily maximum

      Seaside monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Gearhart, OR1,8811864.0%
      Astoria, OR9,9291864.0%
      Jeffers Gardens, OR3121864.0%
      Cannon Beach, OR1,5541864.0%
      Warrenton, OR5,6351864.0%
      Seaside, OR6,8111864.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Nanaimo E, BC6,812n/a 
      Valley Park, MO6,813548.0%
      Prairie View, TX6,813524.0%
      Alnwick/Haldimand, ON6,807n/a 
      East Foothills, CA6,8154314.0%
      Seaside, OR6,8111864.0%
      Source: The Seaside, OR 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.