Daily pollen overview
Portland pollen count
Aggregated Ambee readings across the last 346 day(s). Select a day to load hourly detail.
Risk levels use category-specific National Allergy Bureau thresholds. Weed is labeled Ragweed because it is the sole weed species in the current multi-region dataset.
Portland pollen summary for 2026-08-29
Modeled daily averages are 26 grains/m³ tree pollen, 5 grains/m³ grass pollen, and 36 grains/m³ ragweed. NAB risk levels are tree Moderate, grass Moderate, and ragweed Moderate.
Selected day snapshot
Averages and peaks derived from Sat, Aug 29, 2026.
Avg total
67
grains/m³
Avg tree
26
Avg grass
5
Avg ragweed
36
Species breakdown
Daily average grains/m³ for each reported allergen.
Tree
Elm26
Ash0
Oak0
Pine0
Birch0
Maple0
Mulberry0
Poplar/Cottonwood0
Cypress/Juniper/Cedar0
Grass
Grass5
Ragweed
Ragweed36
Peak total
81
Peak ragweed
44
Hourly samples
8
Avg total per hour: 67
| Time (America/Los_Angeles) | Tree | Grass | Ragweed | Total | Risk |
|---|---|---|---|---|---|
| 17:00 | 31 | 6 | 44 | 81 | Tree ModerateGrass ModerateRagweed Moderate |
| 18:00 | 31 | 6 | 44 | 81 | Tree ModerateGrass ModerateRagweed Moderate |
| 19:00 | 31 | 6 | 43 | 80 | Tree ModerateGrass ModerateRagweed Moderate |
| 20:00 | 28 | 5 | 39 | 72 | Tree ModerateGrass ModerateRagweed Moderate |
| 21:00 | 30 | 6 | 42 | 78 | Tree ModerateGrass ModerateRagweed Moderate |
| 22:00 | 19 | 3 | 27 | 49 | Tree ModerateGrass LowRagweed Moderate |
| 23:00 | 19 | 3 | 27 | 49 | Tree ModerateGrass LowRagweed Moderate |
| 00:00 | 16 | 3 | 23 | 42 | Tree ModerateGrass LowRagweed Moderate |
Next 48 hours (forecast)
Ambee hourly forecast in local time (UTC).
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