14 cities and communities

Gutter cleaning, repair and new gutters in Gwinnett County

Metro Atlanta weather, Gwinnett County edition: 56 inches of rain in an average year and 18 days with an inch or more. Summer (June to August) is the wettest stretch (15.1 in). A modest 1,000-square-foot roof here sends 34,900 gallons a year down its downspouts.

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Gwinnett County: rain and roofs

NOAA station USC00096407, 11 mi

56.3″

Gwinnett County: yearly rain

NORCROSS station

17.9

Inch-plus rain days

per year

34,900

Roof runoff, Gwinnett County

gallons per 1,000 sq ft a year

7.90″/hr

Design burst

5 min, 10-year (Atlas 14)

Nov 9

Frost arrives

median first fall frost

1995

Typical house built

median, Census ACS

14%

Pre-1980 houses

Census ACS

Winter14.9 in

Spring13.3 in

Summer15.1 in

Fall13.0 in

Bars to one scale; the longest is summer (June to August).

Cities and communities in Gwinnett County

Place	Rain, in	Days ≥ 1 in	First frost	Median year built
Peachtree Corners	56.3	17.9	11/09	1988
Duluth	56.3	17.9	11/09	1994
Lawrenceville	56.3	17.9	11/07	1987
Sugar Hill	56.4	17.5	11/04	2002
Suwanee	56.3	17.9	11/04	2002
Snellville	56.3	17.9	11/07	1989
Norcross	56.3	17.9	11/09	1991
Buford	56.4	17.5	11/04	1994
Lilburn	56.3	17.9	11/09	1987
Loganville	50.9	17.6	11/07	2003
Braselton	52.4	14.9	11/14	2009
Mountain Park	56.3	17.9	11/09	1979
Auburn	50.9	17.6	11/07	1992
Dacula	50.9	17.6	11/07	2001

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

Stormwater in Gwinnett County

Gwinnett County bills a stormwater utility fee by the amount of hard surface on each parcel: roof, driveway, patio. Credits of up to 40% are available, among them for a rain garden on a residential lot and for a household that takes part in county watershed programs. Cities inside the county can run their own stormwater charge; the property tax or water bill names the one that applies.

Source: Gwinnett County, Stormwater Utility Fee and Credits

Unincorporated communities listed here: Braselton, Mountain Park.

When to clean gutters here

Median frost dates for Gwinnett County: first in fall about November 9, last in spring about March 25 (NOAA). Fall cleanout after the frost, spring cleanout after the pollen: two visits cover most Atlanta yards with trees.

Gutter size for the county’s downpours

Atlanta thunderstorms are the real test. For Gwinnett County, NOAA Atlas 14 puts the ten-year, five-minute burst at 7.90 inches an hour. Using the Copper Development Association rule, that means roughly 910 sq ft of roof per 2×3 downspout, or 1,820 sq ft per 3×4.

The houses

About 322,852 households live in Gwinnett County; half the homes were built by 1995, and 14% before 1980 (ACS 2020–2024).