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Cook County, Illinois

Gutter cleaning, repair and new gutters in Oak Forest, IL

A normal year in Oak Forest brings about 42 inches of rain; on roughly 10 of its days, an inch or more comes down at once. The wettest season is summer (June to August), with about 13.7 inches; the driest is winter (December to February), with 7.1. Every 1,000 square feet of roof sheds about 26,100 gallons a year, and all of it goes through the gutters.

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Oak Forest: rain and roofs

NOAA station USC00116616, 9 mi
42.1 in
Rain in a normal year, Oak Forest
NOAA normal, PARK FOREST
9.8
Days with an inch or more
a year
26,100 gal
Water off 1,000 sq ft of roof in Oak Forest
0.62 gal per sq ft per inch
7.38 in/hr
5-minute downpour, once in 10 years
NOAA Atlas 14 Volume 2
Oct 20
First fall frost
median date
1975
Median year homes were built
ACS 2020–2024
62%
Homes built before 1980
ACS 2020–2024
Winter7.1 in
Spring11.2 in
Summer13.7 in
Fall10.1 in

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

For days with an inch of rain or more, Oak Forest ranks near the middle of the 695 places in Illinois on this site (9.8 a year). By the age of its homes it sits near the middle of the 695 places in Illinois on this site (half built by 1975). By its first fall frost it sits near the middle of the 695 places in Illinois on this site (October 20).

When to clean gutters in Oak Forest

The first fall frost comes around October 20 in a typical year here, and the last spring frost around April 23 (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 Oak Forest rain

What overwhelms a gutter is a burst, not a season. In Oak Forest the five-minute rain expected about once in ten years falls at 7.38 inches an hour (NOAA Atlas 14 Volume 2). At that rate one 2-by-3-inch downspout drains about 980 square feet of roof and one 3-by-4-inch downspout about 1,950, 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 Oak Forest

Half the homes in Oak Forest were built by 1975, 62% 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.

80% of households own their home, and 68% of homes are detached houses, 4% townhouses. In a townhouse or HOA community, check who owns the gutters and what colors are allowed before booking.

Hiring in Illinois

Ask any contractor working in Oak Forest what Illinois requires of them for gutter work, and to show proof of insurance. Hiring a gutter contractor

Gutter work in Oak Forest

With half the homes built by 1975, replacement gutters and the fascia behind them come up more often here than in newer suburbs. The line takes all of it:

Nearby

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