Daily pollen overview
Boston 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.
Boston pollen summary for 2026-08-29
Modeled daily averages are 27 grains/m³ tree pollen, 5 grains/m³ grass pollen, and 38 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
70
grains/m³
Avg tree
27
Avg grass
5
Avg ragweed
38
Species breakdown
Daily average grains/m³ for each reported allergen.
Tree
Elm27
Ash0
Oak0
Pine0
Birch0
Maple0
Mulberry0
Poplar/Cottonwood0
Cypress/Juniper/Cedar0
Grass
Grass5
Ragweed
Ragweed38
Peak total
91
Peak ragweed
49
Hourly samples
8
Avg total per hour: 70
| Time (America/New_York) | Tree | Grass | Ragweed | Total | Risk |
|---|---|---|---|---|---|
| 20:00 | 35 | 7 | 49 | 91 | Tree ModerateGrass ModerateRagweed Moderate |
| 21:00 | 30 | 6 | 42 | 78 | Tree ModerateGrass ModerateRagweed Moderate |
| 22:00 | 29 | 5 | 40 | 74 | Tree ModerateGrass ModerateRagweed Moderate |
| 23:00 | 27 | 5 | 38 | 70 | Tree ModerateGrass ModerateRagweed Moderate |
| 00:00 | 24 | 4 | 33 | 61 | Tree ModerateGrass LowRagweed Moderate |
| 01:00 | 24 | 4 | 33 | 61 | Tree ModerateGrass LowRagweed Moderate |
| 02:00 | 29 | 5 | 41 | 75 | Tree ModerateGrass ModerateRagweed Moderate |
| 03:00 | 18 | 3 | 25 | 46 | Tree ModerateGrass LowRagweed Moderate |
Next 48 hours (forecast)
Ambee hourly forecast in local time (UTC).
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