Santa Clara County, California
Gutter cleaning, repair and new gutters in Cupertino, CA
Rain in Cupertino adds up to about 13 inches in a normal year, with about 2 days that bring an inch or more. The wettest season is winter (December to February), with about 7.9 inches; the driest is summer (June to August), with 0.1. That is about 8,300 gallons a year off each 1,000 square feet of roof, every drop of it through a gutter and a downspout.
Call (866) 228-6229 free call to a gutter contractor serving CupertinoCupertino: rain and roofs
NOAA station USW00023244, 6 miBars to one scale; the longest is winter (December to February).
Counting days with an inch of rain or more, Cupertino sits among the fewest heavy-rain days of the 939 places in California on this site (1.8 a year). By house age it falls near the middle of the 938 places in California on this site (half built by 1973).
When to clean gutters in Cupertino
Frost is rare in Cupertino, 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 Cupertino rain
The short, hard downpour is what a gutter is sized for. In Cupertino the five-minute rain expected about once in ten years falls at 2.75 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 2,620 square feet of roof and one 3-by-4-inch downspout about 5,240, 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.
Cupertino is dry by national standards, about 13 inches in a normal year, but much of the rain that does come can arrive in short, hard storms: the five-minute downpour expected once in ten years still runs at 2.75 inches an hour. Where gutters are used here, the job is moving that burst away from the foundation, and keeping a dry season’s dust and debris from blocking the first storm.
The houses in Cupertino
Half the homes in Cupertino were built by 1973, 64% 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. On a house built before 1978, replacing more than 20 square feet of painted fascia or trim falls under the EPA’s lead-safe rule, so ask whether the crew is certified.
61% of households own their home, and 57% of homes are detached houses, 13% townhouses. In a townhouse or HOA community, check who owns the gutters and what colors are allowed before booking.
Hiring in California
Licensing for gutter work differs from state to state; ask a contractor in Cupertino 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 Cupertino
With half the homes built by 1973, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it: