Menard County, IL Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Menard County
That's Menard County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. Flat and low-pitch roofs in Menard County are actually governed by ASCE 7's §7.3.4 minimum of 20 psf, not the 14 psf the ground-load formula alone would produce.
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.
Menard County, IL: quick facts
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#1,072 of 2,758
- Illinois rank#75 of 102
- Population11,963
- Annual snowfall, NOAA normal15.2 in.
- FIPS17129
Where Menard County's figure sits nationally
Out of 2,758 rated US counties, Menard County sits at #1,072, the top 39% nationally - #75 of 102 within Illinois. 19.3 psf is Illinois's typical county figure - Menard County beats it by 0.7 psf.
Near 40.0226°N 89.7941°W, FIPS 17129: Menard County counts 11,963 residents and a 20 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Menard County
Most winters bring Menard County roughly 15.2 in. of snow - NOAA's normal at PETERSBURG 1E, IL US, 2.2 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Menard 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 Menard County's county-wide figure. See the methodology guide.