NH · Allergy Season Guide
Derry Allergy Season Guide
PollyMap is actively seeking a qualified local collection partner in Derry. This guide uses regional climate and historical allergen data while we recruit a local host.
PollyMap is actively looking for a qualified local partner in Derry.
We're recruiting a qualified local allergy clinic, naturopathic clinic, university, environmental health professional, or other qualified organization to become the official pollen collection partner for Derry.
Become the Official PollyMap Partner for DerrySummary
PollyMap does not yet have weekly collected pollen data for Derry. This guide is based on regional climate patterns and historical allergen data while we recruit a local collection partner. Tree pollen peaks in spring, grass pollen in late spring and early summer, and weed pollen in late summer and fall.
Local allergy guide for Derry
Derry shares New Hampshire's a humid continental climate with four distinct seasons — cold, snowy winters and warm, humid summers. at 200 ft elevation.
Derry at 200 ft elevation sits within New Hampshire's broader regional climate.
In Derry, tree pollen — including Birch, Oak, Maple — typically dominates from late winter through spring. Timothy grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Derry's local mold profile includes Alternaria, Cladosporium, Aspergillus. Spore counts tend to peak after rainfall and during the warm, humid portion of the year.
Local weather — temperature, rainfall, wind, and humidity — drives day-to-day pollen levels. Dry, windy days following warm weather typically produce the highest counts, while heavy rain temporarily clears the air.
Derry monthly allergy calendar
Typical month-by-month intensity for the four major airborne allergen categories in Derry.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | Low | Mod | High | V.High | V.High | High | Mod | Low | Low | Low | Low | Low |
| Grass | — | — | Low | Mod | V.High | V.High | High | Mod | Low | Low | — | — |
| Weed | Low | Low | Low | Mod | Mod | Mod | High | V.High | V.High | High | Mod | Low |
| Mold | Low | Low | Mod | Mod | High | High | High | V.High | V.High | V.High | Mod | Low |
Most common local pollens — weeds
Most common airborne molds
Current PollyMap data for Derry
Official PollyMap Partner in Derry
Frequently asked questions about allergies in Derry
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Related guides
State Guide
New Hampshire Allergy Season Guide
Nearby city
Manchester Allergy Season Guide
Nearby city
Nashua Allergy Season Guide
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Concord Allergy Season Guide
Nearby city
Dover Allergy Season Guide
Library
Pollen species library
Library
Mold species library
Reports
Latest PollyMap reports
Partners
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