St. Croix County, WI Roof Snow Load - 35 psf
St. Croix County, WI: your roof's ASCE 7 snow number, in plain English
St. Croix County's roofs are built to hold 35 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 77 inches of fresh, light snow, 28 inches of old, settled snow, or as little as 7 inches of solid ice - snow that heavy is rare here but ice from a freeze-thaw cycle adds up far faster than the depth suggests. This is a serious structural load - older homes built before modern snow-load provisions, or ones with low-slope or flat roof sections, are worth having checked.
St. Croix County at a glance
- Design roof snow load35 psf
- Ground snow load, ASCE 7 map50 psf
- National rank#110 of 2,758
- Wisconsin rank#20 of 72
- Population97,954
- Annual snowfall, NOAA normal43.4 in.
- FIPS55109
St. Croix County by the numbers
Nationally that's #110 out of 2,758 rated counties, the top 4%; within Wisconsin alone, St. Croix County ranks #20 of 72. Wisconsin counties average 30.9 psf; St. Croix County runs 4.1 psf higher than that.
St. Croix County, FIPS 55109, is home to 97,954 people near 45.029°N 92.4473°W. Its 50 psf ground snow load figure is the map value; 35 psf is what a roof is actually designed for.
St. Croix County's snowfall, most winters
43.4 in. a year: that's St. Croix County's NOAA 1991-2020 snowfall normal, measured at BALDWIN, WI US (5.3 mi away). See the density guide.
Before you rely on St. Croix County's number
Treat the St. Croix County figure as a starting point, not a final answer: it assumes standard occupancy, a heated structure and a moderately sheltered site, per ASCE 7-22's own defaults. Exposed terrain, an unheated building or a steeper roof all shift the real number.
For a real application, skip the county number and go straight to the ASCE 7 Hazard Tool - enter your coordinates and it returns a site-specific figure a plan reviewer will recognize. Details: the calculation guide.