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San Mateo County, California

Gutter cleaning, repair and new gutters in Colma, CA

Colma gets about 21 inches of rain in a normal year, and on about 4 days a year an inch or more falls in a single day. The wettest season is winter (December to February), with about 12.2 inches; the driest is summer (June to August), with 0.3. Off a 1,000-square-foot roof, that comes to about 12,800 gallons a year for the gutters to carry.

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Colma: rain and roofs

NOAA station USC00047767, 5 mi
20.6 in
Rain in a normal year, Colma
NOAA normal, SAN FRANCISCO OCEANSIDE
4.3
Days with an inch or more
a year
12,800 gal
Water off 1,000 sq ft of roof in Colma
0.62 gal per sq ft per inch
2.94 in/hr
5-minute downpour, once in 10 years
NOAA Atlas 14 Volume 6
1988
Median year homes were built
ACS 2020–2024
44%
Homes built before 1980
ACS 2020–2024
Winter12.2 in
Spring5.0 in
Summer0.3 in
Fall3.2 in

Bars to one scale; the longest is winter (December to February).

By heavy-rain days, Colma falls near the middle of the 939 places in California on this site (4.3 a year). By the age of its homes it sits among the newest by median year built of the 938 places in California on this site (half built by 1988).

When to clean gutters in Colma

Frost is rare in Colma, 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 Colma rain

Gutters are sized for the worst few minutes of a storm, not for the year. In Colma the five-minute rain expected about once in ten years falls at 2.94 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 2,450 square feet of roof and one 3-by-4-inch downspout about 4,900, 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 Colma

Half the homes in Colma were built by 1988, 44% before 1980 (ACS 2020–2024). At that age a gutter has seen decades of leaves and storms, and the fascia it hangs from has too. 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.

47% of households own their home, and 28% of homes are detached houses, 31% townhouses. If an association maintains the exterior, the gutters may be its job rather than yours; check before calling.

Hiring in California

Before hiring in Colma, ask which California license or registration the contractor holds and for a certificate 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 Colma

In a neighborhood with half its homes built by 1988, the usual calls are cleaning, guards and small repairs. The line takes all of it:

Nearby

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