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Gutter cleaning, repair and new gutters in Patterson, CA

A normal year in Patterson brings about 12 inches of rain; on roughly 1 of its days, an inch or more comes down at once. The wettest season is winter (December to February), with about 7.0 inches; the driest is summer (June to August), with 0.2. Off a 1,000-square-foot roof, that comes to about 7,600 gallons a year for the gutters to carry.

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Patterson: rain and roofs

NOAA station USW00023258, 15 mi
12.3 in
Rain in a normal year, Patterson
NOAA normal, MODESTO CITY CO AP
1.0
Days with an inch or more
a year
7,600 gal
Water off 1,000 sq ft of roof in Patterson
0.62 gal per sq ft per inch
2.22 in/hr
5-minute downpour, once in 10 years
NOAA Atlas 14 Volume 6
Dec 5
First fall frost
median date
2000
Median year homes were built
ACS 2020–2024
15%
Homes built before 1980
ACS 2020–2024
Winter7.0 in
Spring3.4 in
Summer0.2 in
Fall1.7 in

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

By heavy-rain days, Patterson falls among the fewest heavy-rain days of the 939 places in California on this site (1.0 a year). Its housing ranks among the newest by median year built of the 938 places in California on this site (half built by 2000). By first frost it falls near the middle of the 507 places in California on this site (December 5).

When to clean gutters in Patterson

The first fall frost comes around December 5 in a typical year here, and the last spring frost around January 31 (median dates, NOAA normals). A fall cleaning set for the weeks after that frost, when the branches over the house are bare, gets the year’s leaves in one trip; a spring visit follows once the pollen and catkins have come down.

When to clean gutters explains how the trees over a roof change the schedule.

Gutter and downspout size for Patterson rain

The short, hard downpour is what a gutter is sized for. In Patterson the five-minute rain expected about once in ten years falls at 2.22 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 3,240 square feet of roof and one 3-by-4-inch downspout about 6,490, 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.

Patterson is dry by national standards, about 12 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 2.22 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 Patterson

Half the homes in Patterson were built by 2000, 15% before 1980 (ACS 2020–2024). Most houses here are young enough to have their first gutters, so cleanings, guards and small leaks come up more than replacements.

74% of households own their home, and 90% 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 Patterson 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 Patterson

In a neighborhood with half its homes built by 2000, the usual calls are cleaning, guards and small repairs. The line takes all of it:

Nearby

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