Navajo County, AZ Roof Snow Load - 0 psf
What ASCE 7 says about snow load in Navajo County
That's Navajo County's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from.
Converted to something you can actually eyeball on a roof: about 0 in. of fresh powder, 0 in. once it settles and packs down, or just 0 in. if it's turned to ice. This county’s ground snow load maps to zero - snow load is not a driver of roof design here.
Navajo County, AZ: quick facts
- Design roof snow load0 psf
- Ground snow load, ASCE 7 map0 psf
- National rank#2,573 of 2,758
- Arizona rank#9 of 13
- Population109,516
- Annual snowfall, NOAA normal3.3 in.
- FIPS04017
Where Navajo County's figure sits nationally
Out of 2,758 rated US counties, Navajo County sits at #2,573, the top 93% nationally - #9 of 13 within Arizona. Arizona counties average 0.4 psf; Navajo County runs 0.4 psf lower than that.
Near 35.3908°N 110.321°W, FIPS 04017: Navajo County counts 109,516 residents and a 0 psf map value, which the code's own factors turn into 0 psf.
How much it actually snows in Navajo County
Most winters bring Navajo County roughly 3.3 in. of snow - NOAA's normal at HOLBROOK, AZ US, 34.6 mi off. Worth noting: the nearest station reporting snowfall normals sits 34.6 mi from Navajo County's center, so treat this as a regional figure rather than an exact one. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Navajo 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 Navajo County's county-wide figure. See the methodology guide.