USFWS · Iowa

Union Slough National Wildlife Refuge

Union Slough National Wildlife Refuge, located in Kossuth County, Iowa, was established in 1938 to provide a refuge and breeding ground for waterfowl and other migratory birds. The actual slough is all that remains of a pre-glacial riverbed, and its name is derived from the connection or "union" of two watersheds: the Blue Earth River of Minnesota and the East Fork of the Des Moines River. The terrain is nearly flat, allowing the flow of the water to be determined by the direction of the wind at times.

From Wikipedia, licensed CC BY-SA 4.0.

Official page at U.S. Fish and Wildlife Service ↗
DesignationNational Wildlife Refuge
Managed byU.S. Fish and Wildlife Service
StateIowa
Size2,840 acres
FWS regionRegion 3
Center point43.27° N, 94.12° W
Night skyAbout as dark as the ground gets (Black Marble reading 16)

Boundary map

1 outline

Boundary, simplified to about 0.005 degrees

The outline is the agency boundary simplified for display, so small parcels and inholdings may not show. The agency page has the authoritative map.

Weather by month

NOAA climate normals →
Weather by month near Union Slough National Wildlife Refuge10°20°30°40°50°60°70°80°January: 0.90 inches of precipitationFebruary: 1.04 inches of precipitationMarch: 1.95 inches of precipitationApril: 3.36 inches of precipitationMay: 4.72 inches of precipitationJune: 5.49 inches of precipitationJuly: 4.13 inches of precipitationAugust: 4.27 inches of precipitationSeptember: 3.27 inches of precipitationOctober: 2.44 inches of precipitationNovember: 1.46 inches of precipitationDecember: 1.06 inches of precipitationJanFebMarAprMayJunJulAugSepOctNovDecJanuary: 15.4°F averageFebruary: 19.8°F averageMarch: 32.6°F averageApril: 46.1°F averageMay: 58.5°F averageJune: 69.0°F averageJuly: 72.1°F averageAugust: 69.7°F averageSeptember: 62.6°F averageOctober: 49.7°F averageNovember: 34.3°F averageDecember: 21.6°F average0 in2 in4 in6 inTemp °FInches
The line is the average temperature and the bars are average precipitation at Algona, 15 miles from the center point at 1,214 feet, station USC00130133 in the NOAA monthly climate normals for 1991 to 2020. Precipitation totals about 34 inches a year.

Large units span more than one climate. The station stands in for the center point, and the outer parts of the boundary can be warmer or colder.

Explore

Nearby on the other atlases

National Register listings within 15 miles · 4 in all · Register Atlas

Landmarks are listed first, then by distance from the boundary.

Guidebooks for Iowa

We earn a small commission if you buy through these links. It does not change what we list.

  • Hiking Iowa
    Elizabeth Corcoran Hill and Kate Corcoran, 2023
    Find at Bookshop.org
  • Rail-trails Iowa & Missouri
    Rails-to-Trails Conservancy, 2017
    Find at Bookshop.org
  • Best Easy Day Hikes des Moines
    Michael Ream, 2011
    Find at Bookshop.org

Titles come from Open Library's catalog, matched by subject heading or by title.

Reference

Questions people ask

How big is Union Slough National Wildlife Refuge?

2,840 acres.

Source: How acreage is computed

Who manages Union Slough National Wildlife Refuge?

The U.S. Fish and Wildlife Service.

Source: U.S. Fish and Wildlife Service

What state is Union Slough National Wildlife Refuge in?
How do I get to Union Slough National Wildlife Refuge?

A point inside the boundary is at 43.265° N, 94.119° W. The official page carries directions and the office address.

Source: U.S. Fish and Wildlife Service

Are there historic places near Union Slough National Wildlife Refuge?

The National Register has 4 listings within 15 miles, including G.a.r. Memorial Hall and Land and Loan Office Building.

Source: Register Atlas

Sources

  • Boundary, name: the U.S. Fish and Wildlife Service refuge boundary layer.
  • States and territories: computed by intersecting the boundary with Census state polygons and coarse outlines of the territories and outlying islands. A place is listed when it holds at least one percent of the area. A boundary that touches no outline is listed under the nearest one.
  • Acreage: geodesic area of the published polygon. The agency’s official acreage can differ where the boundary includes water, easements or inholdings.
  • Description: Union Slough National Wildlife Refuge on Wikipedia, CC BY-SA 4.0. The article was accepted because its title contains this unit’s name.
  • Campgrounds: the Campsite Atlas index of federal campgrounds, matched to this boundary at build time.
  • Night sky: NASA Black Marble (VIIRS, 2016 composite) sampled at zoom 6 around the center point.
  • Weather, alerts, air quality, river flow and earthquakes load live in your browser from NWS, AirNow, USGS and iNaturalist when you open the page.