A Gutter Calendar for Cobb County
NOAA rainfall normals, pollen season and leaf drop, month by month, with one gutter task for each.
Call (770) 678-7045Gutter work around Marietta follows a calendar set by three things: rain, pollen and leaf drop. The rainfall column below is NOAA's 1991–2020 monthly normal for Atlanta, the nearest official normal to Marietta. Pollen season peaks in late winter and early spring — Atlanta's count hit a record 14,801 grains per cubic meter on March 29, 2025. Oak and sweetgum leaves come down in fall, and sweetgum litters lawns every autumn with its spiky seed balls. Loblolly pines shed needles all year, with a fall drop of older interior needles.
| Month | Normal rainfall | What's happening | One task |
|---|---|---|---|
| Jan | 4.59 in | Winter rain; bare hardwoods make it easy to see sagging runs. | Check hangers and seams from the ground after storms. |
| Feb | 4.55 in | Pollen season begins; jonquils bloom. | Clear any leftover leaves before pollen binds them. |
| Mar | 4.68 in | Peak pine and oak pollen. | Watch for pollen mats in gutters and on fine mesh. |
| Apr | 3.81 in | Pollen tapers; oak catkins fall. | Rinse guards once pollen ends. |
| May | 3.56 in | Driest spring month; catkins and seeds. | Late-spring cleaning on wooded lots. |
| Jun | 4.54 in | Thunderstorm season ramps up. | Confirm downspouts discharge away from the foundation. |
| Jul | 4.75 in | Wettest month; peak thunderstorm season. | Watch for overflow points during storms. |
| Aug | 4.30 in | Storms continue. | Note any spot that spills every storm for re-pitching. |
| Sep | 3.82 in | Storm season winds down. | Book fall cleaning or guard installation. |
| Oct | 3.28 in | Driest month; leaves start to fall. | Good weather for installation work. |
| Nov | 3.98 in | Peak oak and sweetgum leaf drop. | Main cleaning of the year after most leaves are down. |
| Dec | 4.57 in | Late leaves; winter rain returns. | Final check that downspouts run clear. |
Reading the calendar
Rain is spread through the year. No month averages less than about 3.3 inches, so there is no true dry season to wait for. What changes is how the rain arrives: July, the wettest month, is also the peak of thunderstorm season in north and central Georgia, when short, heavy storms test whether gutters are big enough and downspouts are clear.
Debris comes in two waves. Pollen and catkins in spring, leaves in late fall, needles throughout. On wooded lots that means two cleanings a year — late spring and early winter — or guards.
October is the quiet month. The driest month on the calendar, before most leaves fall, is a practical window for installation or replacement work, and new gutters with guards then go into leaf season ready.
Two cleanings or one?
- Open sky, few trees: one cleaning in late fall or early winter.
- Mixed hardwoods and pines: late spring and early winter.
- Pines directly over the roof: two or three a year, or guards.
The gutter cleaning page covers what each visit should include.