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Was October 24, 2026 high ragweed pollen in Hillsboro?

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NO

No — a frosty -1 °C night in Hillsboro has ended ragweed season, which peaks in August and September.

Why
  • Hillsboro overnight low: -1 °C (30 °F), a killing frost
  • Portland ragweed typically peaks August–September
  • Ragweed counts here are low even at peak

For Hillsboro, OR, US · checked 7:32 PM · Open-Meteo air quality, WeatherBug, The Weather Channel, Tomorrow.io Weather, Huber Heights, OH Pollen Forecast | MyPollenPal, Are there ticks and mosquitoes in Gulfport, MS today?, PollenTracker, Open-Meteo weather forecast