Los Angeles County, California
Gutter cleaning, repair and new gutters in Walnut, CA
A normal year in Walnut brings about 17 inches of rain; on roughly 5 of its days, an inch or more comes down at once. The wettest season is winter (December to February), with about 10.8 inches; the driest is summer (June to August), with 0.2. Off a 1,000-square-foot roof, that comes to about 10,400 gallons a year for the gutters to carry.
Call (866) 228-6229 free call to a gutter contractor serving WalnutWalnut: rain and roofs
NOAA station USC00042090, 4 miBars to one scale; the longest is winter (December to February).
By heavy-rain days, Walnut falls near the middle of the 939 places in California on this site (5.4 a year). By house age it falls near the middle of the 938 places in California on this site (half built by 1983).
When to clean gutters in Walnut
Frost is rare in Walnut, and in many years there is none (NOAA normals). With no hard freeze to strip the trees, the fall cleaning follows the leaf drop itself; book it once the trees over the roof are bare, and plan a second visit in spring.
When to clean gutters explains how the trees over a roof change the schedule.
Gutter and downspout size for Walnut rain
The short, hard downpour is what a gutter is sized for. In Walnut the five-minute rain expected about once in ten years falls at 3.43 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 2,100 square feet of roof and one 3-by-4-inch downspout about 4,200, by the rule in the Copper Development Association’s design handbook. Try your own roof in the gutter and downspout calculator, which starts from this figure.
The houses in Walnut
Half the homes in Walnut were built by 1983, 37% before 1980 (ACS 2020–2024). Houses that age have often had their gutters replaced once already; if not, the original runs and the boards behind them deserve a close look.
83% of households own their home, and 94% of homes are detached houses, 2% townhouses. If an association maintains the exterior, the gutters may be its job rather than yours; check before calling.
Hiring in California
Licensing for gutter work differs from state to state; ask a contractor in Walnut which license or registration they hold in California, and for proof of liability insurance. Hiring a gutter contractor
In California’s fire hazard severity zones, the 2025 Wildland-Urban Interface Code (in force January 1, 2026) requires gutters and downspouts of noncombustible material, and gutters fitted with an approved means to keep leaves and debris from collecting (section 504.4). (2025 California Wildland-Urban Interface Code, Chapter 5 (UpCodes))
Gutter work in Walnut
With half the homes built by 1983, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it: