Hanover, NH Pollen Calendar

Today in Hanover

Monday, July 27, 2026

The Hanover Pollen Calendar, Month by Month

Each month is rated from Low to Very High, with the allergen that usually drives it. The current month is outlined.

What's Active in July

These allergens are usually in the air around Hanover this month:

Typical peak timing this month: early July to mid July.

The Worst and Best Months in Hanover

Hanover's pollen usually peaks in May, driven by Birch. If your allergies flare on the same weeks every year, that is usually why. The calmest month is typically January.

New Hampshire has a late spring tree season, grass in early summer, and a moderate ragweed season in the fall.

A pollen calendar shows the usual pattern, but weather shifts it. A warm winter pulls tree season earlier, and a late frost stretches ragweed into November. Start any allergy medication a week or two before your worst month, and check the daily count to catch the spikes. If symptoms hit hard every season, an allergist in New Hampshire can help with testing and longer-term options like allergy shots.

Keep Track of Pollen in Hanover

The calendar tells you what to expect. Your daily report tells you what's actually happening:

• Hanover pollen count today — live tree, grass, and weed levels with a 5-day forecast.
• Hanover air quality — today's AQI and the pollutants behind it.
• New Hampshire pollen season — the statewide calendar and other cities.
• Today's worst pollen cities — see where Hanover ranks right now.

Get Hanover pollen alerts

We send a free email whenever pollen is High or Very High in Hanover. No spam, no daily emails when pollen is low. Just a heads-up on the days that matter.