Allergy Season Calculator
Check expected pollen levels by region and month.
Get prevention tips and allergy management suggestions.
Allergy Forecast
Pollen seasons by type:
| Pollen Type | Season | Peak Months |
|---|---|---|
| Tree pollen | Spring | March–May |
| Grass pollen | Late spring/summer | May–July |
| Weed/ragweed | Late summer/fall | August–October |
| Mold spores | Year-round (peaks in warm, humid months) | Varies |
Regional patterns (US):
- Northeast: Tree (Mar–May), Grass (May–Jul), Ragweed (Aug–Oct)
- Southeast: Earlier start (Feb), longer season through Nov
- Midwest: Strong ragweed season (Aug–Oct)
- Southwest: Cedar (Dec–Feb), minimal grass pollen
- Pacific Northwest: Grass heavy (May–Jul), mold in wet months
Prevention tips:
- Check daily pollen counts before outdoor activities
- Keep windows closed during high pollen days
- Shower after outdoor time
- Start antihistamines 2 weeks before your allergy season
- Use HEPA air filters indoors