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Gutter cleaning, repair and new gutters in Forsyth County

Metro Atlanta weather, Forsyth County edition: 56 inches of rain in an average year and 18 days with an inch or more. Winter (December to February) is the wettest stretch (15.7 in). Each 1,000 square feet of roof drains 34,900 gallons a year.

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Forsyth County: rain and roofs

NOAA station USC00092408, 0 mi
56.4″
Forsyth County: yearly rain
CUMMING 2N station
17.5
Inch-plus rain days
per year
34,900
Roof runoff, Forsyth County
gallons per 1,000 sq ft a year
7.99″/hr
Design burst
5 min, 10-year (Atlas 14)
Nov 4
Frost arrives
median first fall frost
2004
Typical house built
median, Census ACS
7%
Pre-1980 houses
Census ACS
Winter15.7 in
Spring13.7 in
Summer14.5 in
Fall12.4 in

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

Cities and communities in Forsyth County

PlaceRain, inDays ≥ 1 inFirst frostMedian year built
Cumming 56.4 17.5 11/04 1998

NOAA 1991–2020 normals by nearest station; ACS 2020–2024. Places of 5,000 people or more.

Stormwater in Forsyth County

Streets, drains and runoff in the unincorporated parts of Forsyth County are the county’s; in Cumming, the city’s. Ask the county or the city before running a downspout into a street, a ditch or a neighbor’s yard.

When to clean gutters here

Median frost dates for Forsyth County: first in fall about November 4, last in spring about April 4 (NOAA). Wait for the frost and bare branches before the fall cleanout; come back after the yellow spring pollen settles.

Gutter size for the county’s downpours

Think of the five minutes when a storm opens up. For Forsyth County, NOAA Atlas 14 puts the ten-year, five-minute burst at 7.99 inches an hour. Using the Copper Development Association rule, that means roughly 900 sq ft of roof per 2×3 downspout, or 1,800 sq ft per 3×4.

The houses

About 86,688 households live in Forsyth County; half the homes were built by 2004, and 7% before 1980 (ACS 2020–2024).

What the line covers

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