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Best Time to See Monarch Butterflies in New Hampshire

August, September and July is the best time to see monarch butterflies in New Hampshire. Based on 3,794 verified iNaturalist observations, here is exactly when monarch butterflies are most active across the year in New Hampshire.

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By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.

Migratory Monarch photographed in New HampshireMonarch photographed in New HampshireMonarch photographed in New Hampshire
Photos by iNaturalist observers, used under Creative Commons.
Best months: August, September, JulyPeak season right now

3,794 verified observations of monarch butterflies in New Hampshire, recorded across 7 months of the year on iNaturalist.

When monarch butterflies are recorded in New Hampshire

Peak month

August

1,383 records (36.5% of the year)

Quietest month

January

No verified records

MonthObservationsShare
January00%
February00%
March00%
April00%
May150.4%
June1102.9%
Julypeak98125.9%
Augustpeak1,38336.5%
Septemberpeak1,09428.8%
October1975.2%
November140.4%
December00%

Monarch Butterflies you are most likely to see

SpeciesVerified observations
Monarch3,794

Sightings of monarch butterflies in New Hampshire peak in August, when 1,383 of the year's 3,794 verified observations are logged — about 36.5% of the annual total. Activity stays high through August, September and July.

The quietest stretch is January, February and March, when monarch butterflies are hardest to find — no verified records exist for January. If a reliable sighting matters, plan around the peak window rather than the off-season.

The monarch butterflies you are most likely to encounter in New Hampshire are Monarch — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.

Where to go

Best places to see monarch butterflies in New Hampshire

  • Appalachian National Scenic Trail — National Scenic Trail
  • Saint-Gaudens National Historical Park — National Historical Park
Plan your tripAppalachian National Scenic Trail

Plan your monarch butterfly trip in New Hampshire

Start with live tours near Appalachian National Scenic Trail, then compare a nearby stay and a broader wildlife backup before you lock in the trip.

GetYourGuide

Live tours nearby

See live tours near Appalachian National Scenic Trail

Use the live GetYourGuide widget to compare local departures and activity styles close to the main monarch butterfly viewing area.

Booking.com

Stay nearby

Stay near Appalachian National Scenic Trail

Compare hotels, cabins and lodges close to the best monarch butterfly viewing area in New Hampshire.

Find staysPartner link

Viator

Broader backup

Book a monarch butterfly tour in New Hampshire

Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.

See toursPartner link

Frequently asked questions

What is the best month to see monarch butterflies in New Hampshire?+

August is the single best month, and the broader peak window runs through August, September and July, based on 3,794 verified iNaturalist observations.

When are monarch butterflies hardest to see in New Hampshire?+

January is the quietest month for monarch butterflies in New Hampshire, with no verified records on iNaturalist.

Are monarch butterflies active year-round in New Hampshire?+

Monarch butterflies are recorded in 7 of 12 months in New Hampshire, concentrated around August and September.

More wildlife in New Hampshire

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