Monmouth County, NJ Roof Snow Load - 20 psf
Monmouth County, NJ: your roof's ASCE 7 snow number, in plain English
Monmouth County's roofs are built to hold 20 psf of snow, the ASCE 7-22 figure a permit reviewer checks first. 14 psf is what the ground-load formula alone gives; Monmouth County's 20 psf low-slope minimum (§7.3.4) beats it, so that figure is the one that governs on flat and low-pitch roofs.
In depth, not weight: that's roughly 44 inches of fresh, light snow, 16 inches of old, settled snow, or as little as 4 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. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Monmouth County at a glance
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map20 psf
- National rank#528 of 2,758
- New Jersey rank#8 of 17
- Population647,520
- Annual snowfall, NOAA normal29 in.
- FIPS34025
Monmouth County by the numbers
Nationally that's #528 out of 2,758 rated counties, the top 19%; within New Jersey alone, Monmouth County ranks #8 of 17. New Jersey counties average 20.1 psf; Monmouth County runs 0.1 psf lower than that.
Monmouth County, FIPS 34025, is home to 647,520 people near 40.287°N 74.1524°W. Its 20 psf ground snow load figure is the map value; 20 psf is what a roof is actually designed for.
Monmouth County's snowfall, most winters
29 in. a year: that's Monmouth County's NOAA 1991-2020 snowfall normal, measured at NEW BRUNSWICK 3 SE, NJ US (19.2 mi away). See the density guide.
Before you rely on Monmouth County's number
Treat the Monmouth 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.