Napa County, California
Gutter cleaning, repair and new gutters in Angwin, CA
A normal year in Angwin brings about 40 inches of rain; on roughly 12 of its days, an inch or more comes down at once. The wettest season is winter (December to February), with about 23.7 inches; the driest is summer (June to August), with 0.4. Every 1,000 square feet of roof sheds about 24,600 gallons a year, and all of it goes through the gutters.
Call (866) 228-6229 free call to a gutter contractor serving AngwinAngwin: rain and roofs
NOAA station USC00040212, 1 miBars to one scale; the longest is winter (December to February).
For days with an inch of rain or more, Angwin ranks 77th for heavy-rain days of the 939 places in California on this site (12.3 a year). By house age it falls 144th oldest by median year built of the 938 places in California on this site (half built by 1962). By its first fall frost it sits near the middle of the 507 places in California on this site (December 5).
When to clean gutters in Angwin
The first fall frost comes around December 5 in a typical year here, and the last spring frost around April 7 (median dates, NOAA normals). Plan the fall visit for after the frost, when the trees over the roof have finished dropping, and the spring visit for after the pollen and catkins.
When to clean gutters explains how the trees over a roof change the schedule.
Gutter and downspout size for Angwin rain
What overwhelms a gutter is a burst, not a season. In Angwin the five-minute rain expected about once in ten years falls at 2.81 inches an hour (NOAA Atlas 14 Volume 6). At that rate one 2-by-3-inch downspout drains about 2,560 square feet of roof and one 3-by-4-inch downspout about 5,120, 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 Angwin
Half the homes in Angwin were built by 1962, 82% before 1980 (ACS 2020–2024). In a neighborhood that age, many houses are on their second set of gutters or due for one, and the fascia board behind them is worth checking at the same visit. 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.
63% of households own their home, and 70% of homes are detached houses, 9% townhouses. In a townhouse or HOA community, check who owns the gutters and what colors are allowed before booking.
Hiring in California
Ask any contractor working in Angwin what California requires of them for gutter work, and to show proof of 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 Angwin
With half the homes built by 1962, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it: