Low Weed / Ragweed Pollen

Lower modeled weed and ragweed pollen potential scores higher using climate, humidity, and ecoregion proxies.

Scale0-100

Higher values rank better for this score.

How It's Calculated

The latest published score is normalized to a 0-100 scale. The method below explains what the score rewards, with technical source metadata available for audit.

1
Weed/ragweed burden blends season length, warm-season rank, semi-arid and broad precipitation fits, summer dew point, dry-airborne persistence, low-snow rank, and ecoregion weed proxy, then applies a vegetation gate.
2
A moisture or vegetation gate prevents climate-only fits from over-crediting places where broad growing conditions are weak.
3
The final score is inverse percentile-rank normalized over all scored places, so lower modeled pollen burden scores higher.

Technical details

Score TypeMaster Score

Read from the current master score table for this criterion.

Ranking BasisSingle Score

The top 10 below ignore your blended relocation weights and sort only by Low Weed / Ragweed Pollen.

No source details available for this score.

What This Score Means

Low Weed / Ragweed Pollen rewards places with lower modeled weed and ragweed pollen potential from climate, humidity, and ecoregion proxies.

Statistics Feeding This Score

Modeled season length
Derived as 365 minus annual freezing days.
Source: Derived from NOAA annual normals
Precipitation, dew point, and dry-air persistence
Moisture and airborne-persistence signals used to estimate pollen-favorability.
Source: Derived from NOAA climate and humidity normals
EPA ecoregion proxy
Regional vegetation proxy matched from the place point.
Source: EPA Level III Ecoregions
Temperature and snow
Temperature fit, cooling-degree rank, and low-snowfall rank used as season and growth proxies.
Source: Derived from NOAA annual normals

Source Data

Source: NOAA U.S. Climate Normals, annual/seasonalNOAA NCEI 1991-2020 station normals matched to places using nearby stations, with distance and elevation mismatch penalties.Source: NOAA U.S. Climate Normals, hourlyNOAA NCEI 1991-2020 hourly station normals used for dew point, muggy-hour, and heat-index humidity proxies.Source: EPA Level III EcoregionsEPA ecological-region polygons used as a regional vegetation and species-range proxy for pollen potential.

Known Limits

This is a modeled climate, humidity, and ecoregion pollen-potential proxy, not observed pollen counts.
EPA ecoregions are broad regional vegetation proxies, not parcel-level land cover or measured local plant abundance.
It does not yet include observed pollen stations, wind, mowing, urban canopy, exact tree species, exact ragweed stands, or local vegetation management.

Top 10 Locations

Ranked by Low Weed / Ragweed Pollen.

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