Marin County, CA Roof Snow Load - 0 psf
Marin County, CA: your roof's ASCE 7 snow number, in plain English
Marin County's roofs are built to hold 0 psf of snow, the ASCE 7-22 figure a permit reviewer checks first.
In depth, not weight: that's roughly 0 inches of fresh, light snow, 0 inches of old, settled snow, or as little as 0 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. Snow load is not a factor in roof design here at all; the ground snow load figure maps to zero.
Marin County at a glance
- Design roof snow load0 psf
- Ground snow load, ASCE 7 map0 psf
- National rank#2,538 of 2,758
- California rank#29 of 41
- Population256,400
- Annual snowfall, NOAA normal0 in.
- FIPS06041
Marin County by the numbers
Nationally that's #2,538 out of 2,758 rated counties, the top 92%; within California alone, Marin County ranks #29 of 41. California counties average 1.1 psf; Marin County runs 1.1 psf lower than that.
Marin County, FIPS 06041, is home to 256,400 people near 38.0514°N 122.7464°W. Its 0 psf ground snow load figure is the map value; 0 psf is what a roof is actually designed for.
Marin County's snowfall, most winters
0 in. a year: that's Marin County's NOAA 1991-2020 snowfall normal, measured at SAN RAFAEL CIVIC CTR, CA US (12 mi away). See the density guide.
Before you rely on Marin County's number
Treat the Marin 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. (How this figure is calculated.)