Frozen St. Croix River - William O'Brien State Park, Minnesota

Month by month

Marine on St. Croix in March

Mud, melt and the river waking up — a month of transition and the return of the cranes.

Photo: Tony Webster from Minneapolis, Minnesota, United States / CC BY-SA 2.0, via Wikimedia Commons

41°Faverage high
23°Faverage low
2.13 inprecipitation8 wet days
6.9 insnowfall
12.0 hdaylightsunrise 7:25 AM · sunset 7:15 PM

What March is like

March is a gamble. A snowstorm and a 60-degree day can arrive in the same week. The ice on the St. Croix weakens and breaks up, the Mill Stream runs loud with meltwater, and sandhill cranes return with their rattling calls over the fields. Trails are often icy in the morning and muddy by afternoon.

In March, Marine on St. Croix averages a high of 41°F and a low of 23°F. Expect about 2.1 in of precipitation (liquid equivalent) and roughly 7 in of snow. About 24 nights dip to freezing. Days last about 12.0 hours, with roughly 8.3 hours of sunshine.

The river in March

Long-term average flow at St. Croix Falls in March is 4,391 cfs — close to the yearly average.

What to pack

  • winter coat
  • waterproof boots
  • gloves and a warm hat
  • traction cleats or snowshoes for packed trails

Wildlife to look for in March

Species with a large share of their local iNaturalist records in March. The strip shows each species' records across the year.

Birds

Ring-necked Duck

Ring-necked Duck

Aythya collaris

14 local records · peak March

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(c) Rick Leche, some rights reserved (CC BY-NC-ND)

Northern Shrike

Northern Shrike

Lanius borealis

7 local records · peak March

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(c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski

Hooded Merganser

Hooded Merganser

Lophodytes cucullatus

26 local records · peak April

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(c) Jason Stovin, some rights reserved (CC BY-NC), uploaded by Jason Stovin

American Kestrel

American Kestrel

Falco sparverius

13 local records · peak March

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(c) Josh van der Meulen, some rights reserved (CC BY-NC-ND), uploaded by Josh van der Meulen

Plants & wildflowers

bur oak

Bur oak

Quercus macrocarpa

14 local records · peak March

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(c) rayrob, some rights reserved (CC BY-NC), uploaded by rayrob

paper birch

Paper birch

Betula papyrifera

33 local records · peak April

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(c) Peter Jessen, some rights reserved (CC BY-NC), uploaded by Peter Jessen

fan clubmoss

Fan clubmoss

Diphasiastrum digitatum

13 local records · peak April

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(c) cgbb2004, some rights reserved (CC BY-NC), uploaded by cgbb2004

Eastern Skunk Cabbage

Eastern Skunk Cabbage

Symplocarpus foetidus

114 local records · peak April

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(c) Clare Dellwo Cole, some rights reserved (CC BY-NC), uploaded by Clare Dellwo Cole

Mushrooms & fungi

Powdery Sunburst Lichen

Powdery Sunburst Lichen

Xanthomendoza ulophyllodes

2 local records · peak March

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(c) Joe Walewski, some rights reserved (CC BY-NC), uploaded by Joe Walewski

ceramic parchment

Ceramic parchment

Xylobolus frustulatus

5 local records · peak March

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(c) Cindi Fitzgerald, some rights reserved (CC BY-NC), uploaded by Cindi Fitzgerald

turkey-tail

Turkey-tail

Trametes versicolor

24 local records · peak March

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(c) Christine Young, some rights reserved (CC BY), uploaded by Christine Young

Lumpy Bracket

Lumpy Bracket

Trametes gibbosa

12 local records · peak April

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(c) cwwood, some rights reserved (CC BY-SA), uploaded by cwwood

Insects & butterflies

Half-wing Moth

Half-wing Moth

Phigalia titea

4 local records · peak March

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(c) judywelna, some rights reserved (CC BY-NC), uploaded by judywelna

Willow Pinecone Gall Midge

Willow Pinecone Gall Midge

Rabdophaga strobiloides

10 local records · peak March

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(c) cgbb2004, some rights reserved (CC BY-NC), uploaded by cgbb2004

Mourning Cloak

Mourning Cloak

Nymphalis antiopa

18 local records · peak May

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(c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott

Isabella Tiger Moth

Isabella Tiger Moth

Pyrrharctia isabella

40 local records · peak September

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(c) Larry Clarfeld, some rights reserved (CC BY-NC), uploaded by Larry Clarfeld

Mammals

American Beaver

American Beaver

Castor canadensis

40 local records · peak March

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(c) Rodney Campbell, some rights reserved (CC BY)

American Mink

American Mink

Neogale vison

5 local records · peak March

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(c) Craig K. Hunt, some rights reserved (CC BY-NC), uploaded by Craig K. Hunt

Muskrat

Muskrat

Ondatra zibethicus

24 local records · peak April

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(c) Leonid, some rights reserved (CC BY-NC), uploaded by Leonid

Fisher

Fisher

Pekania pennanti

13 local records · peak November

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(c) edporopat, some rights reserved (CC BY-NC), uploaded by edporopat

Reptiles & amphibians

Boreal Chorus Frog

Boreal Chorus Frog

Pseudacris maculata

20 local records · peak April

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(c) Dan MacNeal, some rights reserved (CC BY), uploaded by Dan MacNeal