The 12-month NH pest calendar

The pest year, month by month

Most pest calendars list the same seven pests twelve times. October has 10 species at peak. March has 1. This one shows what actually varies — pick a month and see what changed.

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The shape of the year

10 species peak in October. 1 in March.

Each bar is a month's peak-species count — the count from that month's own changelog, not an opinion. Tap any month to see what turned up, what wound down, and what's here year-round regardless.

Bar height = species at peakThe big monthBusy / shoulderQuiet — the answer, not a gap

Every month, January to December

12 months

Quiet

January

2 species at peak

January's only real news is a raccoon looking for a mate. Everything else is exactly where it was in December.

10raccoons · birds · cockroaches

See Jan changelog

Quiet

February

3 species at peak

February's real news is a raccoon choosing a den before her kits arrive. Nothing wound down to make room for it.

10raccoons · birds · cockroaches

See Feb changelog

The dead month

March

1 species at peak

If you're seeing an insect indoors in March, it lives in your house. Nothing is coming in from outside yet.

42beetles · flies · mites

See Mar changelog

Shoulder month

April

3 species at peak

April is when the outdoors switches back on — but most of what's waking up is still just building, not yet at peak.

83ants · bats · birds

See Apr changelog

Shoulder month

May

2 species at peak

May belongs to ticks — the nymphs are out, they're the size of a poppy seed, and they're the ones that most often make people sick.

16ticks · beetles · bugs

See May changelog

Busy

June

7 species at peak

By June, everything is awake at once — including bats raising pups you legally cannot evict until late summer.

71ants · bats · cockroaches

See Jun changelog

Busy

July

9 species at peak

October's ten peaks are pushed indoors by cold. July's nine are pulled outdoors by heat — the same size crest, the opposite mechanism.

42crickets · mites · mosquitoes

See Jul changelog

BusyNow

August

6 species at peak

August is the first month this year where exactly as many species are turning down as are turning up. Summer still reads busy; the fall shoulder is already starting underneath it.

55beetles · bugs · fleas

See Aug changelog

Busy

September

6 species at peak

September holds the same peak count as August, but almost none of the same species. Eight summer regulars are winding down while three fall arrivals open the overture to October.

33crickets · flies · spiders

See Sep changelog

The big month

October

10 species at peak

October isn't a month with more pests. It's the month they all move indoors at once.

73mice · rats · beetles

See Oct changelog

Shoulder month

November

2 species at peak

By November, the outdoor pest year is over. The only two things still at peak are already inside your house.

212cockroaches · fleas · bats

See Nov changelog

Quiet

December

2 species at peak

In December there is essentially no outdoor pest activity in New Hampshire. The only pests of note live indoors year-round, and they don't care what month it is.

39cockroaches · crickets · squirrels

See Dec changelog

This calendar is month-first: pick a month, see what changed. For the species-first version — pick a pest, see its whole year — visit the timing guide.

Which month is your problem?

The pest year peaks in October and quiets down by March — but the floor species are inside all twelve months. Get year-round protection from a local team, family-owned since 2017, serving Southern New Hampshire.

Get a free inspection (603) 785-0118

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