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DeKalb County, Illinois

Gutter cleaning, repair and new gutters in Cortland, IL

Cortland gets about 37 inches of rain in a normal year, and on about 8 days a year an inch or more falls in a single day. The wettest season is summer (June to August), with about 12.6 inches; the driest is winter (December to February), with 5.4. Off a 1,000-square-foot roof, that comes to about 23,100 gallons a year for the gutters to carry.

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Cortland: rain and roofs

NOAA station USC00112223, 4 mi
37.3 in
Rain in a normal year, Cortland
NOAA normal, DE KALB
8.2
Days with an inch or more
a year
23,100 gal
Water off 1,000 sq ft of roof in Cortland
0.62 gal per sq ft per inch
7.08 in/hr
5-minute downpour, once in 10 years
NOAA Atlas 14 Volume 2
Oct 18
First fall frost
median date
1996
Median year homes were built
ACS 2020–2024
33%
Homes built before 1980
ACS 2020–2024
Winter5.4 in
Spring10.6 in
Summer12.6 in
Fall8.6 in

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

By heavy-rain days, Cortland falls among the fewest heavy-rain days of the 695 places in Illinois on this site (8.2 a year). Its housing ranks among the newest by median year built of the 695 places in Illinois on this site (half built by 1996). By first frost it falls 158th earliest for the first fall frost of the 695 places in Illinois on this site (October 18).

When to clean gutters in Cortland

The first fall frost comes around October 18 in a typical year here, and the last spring frost around April 24 (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 Cortland rain

The short, hard downpour is what a gutter is sized for. In Cortland the five-minute rain expected about once in ten years falls at 7.08 inches an hour (NOAA Atlas 14 Volume 2). At that rate one 2-by-3-inch downspout drains about 1,020 square feet of roof and one 3-by-4-inch downspout about 2,030, 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.

Cortland averages about 33 inches of snow a year (NOAA normals). Snow on a roof brings ice dams: heat escaping from the house melts the snow, and the water refreezes at the cold eave, in the gutter and over it. University of Minnesota Extension puts the cause in the attic, not in the gutter, so a gutter that fills with ice is a symptom; hangers spaced to carry ice and a sound fascia are what the gutter itself needs.

The houses in Cortland

Half the homes in Cortland were built by 1996, 33% 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.

77% of households own their home, and 67% of homes are detached houses, 12% townhouses. If an association maintains the exterior, the gutters may be its job rather than yours; check before calling.

Hiring in Illinois

Licensing for gutter work differs from state to state; ask a contractor in Cortland which license or registration they hold in Illinois, and for proof of liability insurance. Hiring a gutter contractor

Gutter work in Cortland

In a neighborhood with half its homes built by 1996, the usual calls are cleaning, guards and small repairs. The line takes all of it:

Nearby

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