Bats in Minnesota in August

Yes, August is one of the best months to see bats in Minnesota. It is the 2nd busiest month of the year, with 121 of the 650 sightings logged across the year (18.6%), based on verified iNaturalist records.

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By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.

Eastern Red Bat photographed in MinnesotaTri-coloured Bat photographed in MinnesotaEastern Red Bat photographed in Minnesota
Photos by iNaturalist observers, used under Creative Commons.

Peak month for bats in Minnesota

18.6%

of yearly sightings

121

records in August

#2

busiest month of 12

650

verified records a year

July 22.8%, August 18.6%, September 12.3%. Busiest month is July at 22.8%.

Best months: July, August, SeptemberPeak season right now

650 verified observations of bats in Minnesota, recorded across 12 months of the year on iNaturalist.

When bats are recorded in Minnesota

Peak month

July

148 records (22.8% of the year)

Quietest month

January

6 records

MonthObservationsShare
January60.9%
February60.9%
March172.6%
April629.5%
May7311.2%
June609.2%
Julypeak14822.8%
Augustpeak12118.6%
Septemberpeak8012.3%
October467.1%
November162.5%
December152.3%

Bats you are most likely to see

SpeciesVerified observations
Big Brown Bat258
Little Brown Bat71
Silver-haired Bat63
Eastern Red Bat34
Northern Hoary Bat18
Tri-coloured Bat13
Northern Myotis2
Evening Bat1

In Minnesota, August carries 18.6% of the year's bats sightings, about 10.3 points above an even month-to-month split. That makes it the 2nd busiest of the twelve months, out of 12 months with recorded activity.

Activity is easing off from July (22.8%) into August, and it heads toward September (12.3%) after. This is right inside the peak window, so August is one of the surest months to plan a trip around.

The bats most often recorded in Minnesota are Big Brown Bat, Little Brown Bat and Silver-haired Bat. Those counts are annual totals rather than a August split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in August itself.

Which bats you are most likely to see

  • Big Brown Bat258 records
  • Little Brown Bat71 records
  • Silver-haired Bat63 records
  • Eastern Red Bat34 records
  • Northern Hoary Bat18 records
  • Tri-coloured Bat13 records
Plan your tripGrand Portage National Monument

Plan your bat trip in Minnesota

Start with live tours near Grand Portage National Monument, then compare a nearby stay and a broader wildlife backup before you lock in the trip.

Gear to see them

Frequently asked questions

Can you see bats in Minnesota in August?+

Yes. August accounts for 121 of the 650 verified bats sightings logged in Minnesota across the year, which is 18.6% of the annual total.

Is August a good time to see bats in Minnesota?+

August is one of the best months. It ranks 2nd of the year and sits inside the peak window of July, August and September.

What month is best for bats in Minnesota?+

July is the single busiest month, with the broader peak running through July, August and September, based on 650 verified observations.

Which bats are you most likely to see in Minnesota?+

The most-recorded species in Minnesota are Big Brown Bat, Little Brown Bat and Silver-haired Bat, based on all-time iNaturalist counts.