SnowLoadCheck

Cumberland County, IL Roof Snow Load - 20 psf

What ASCE 7 says about snow load in Cumberland County

Moderate
20 psf

That's Cumberland County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. §7.3.4's low-slope minimum of 20 psf is what actually governs on a flat or low-pitch roof here - higher than the 14 psf the base ground-load formula gives.

Converted to something you can actually eyeball on a roof: about 44 in. of fresh powder, 16 in. once it settles and packs down, or just 4 in. if it's turned to ice. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.

Cumberland County, IL: quick facts

Where Cumberland County's figure sits nationally

Out of 2,758 rated US counties, Cumberland County sits at #1,097, the top 40% nationally - #79 of 102 within Illinois. That's 0.7 psf above Illinois's own county-average design load of 19.3 psf.

Near 39.2731°N 88.2406°W, FIPS 17035: Cumberland County counts 10,305 residents and a 20 psf map value, which the code's own factors turn into 20 psf.

How much it actually snows in Cumberland County

Most winters bring Cumberland County roughly 11.9 in. of snow - NOAA's normal at CASEY, IL US, 14.3 mi off. (fresh vs. packed vs. ice explains why.)

Read this before you rely on it

Cumberland County's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.

Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Cumberland County's county-wide figure. Details: the calculation guide.