Douglas County, Illinois · Tuscola
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Douglas County averages 32 nights a year at 20°F or colder, mostly November to March, and 41% of its homes predate 1960.
June brings the most downpours to Douglas County, part of 7.1 heavy-rain days a year. Check the sump first.
41% of homes here predate 1960, when clay and cast iron sewer laterals were standard. Roots and cracks in those lines are a common cause of backups.
In Douglas County, 3.25 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
13% of occupied homes in Douglas County heat mainly with wood or propane, below the Illinois county median of 16.5%.
Muggy summer nights, lows of 65°F or more, come about 49 times a year in Douglas County. Mold after a leak spreads fastest from June through August.
Local risk profile
Douglas County covers 417 square miles of eastern Illinois, with about 19,751 residents and 8,507 homes. Besides Tuscola, the county seat, the biggest communities are Arcola, Villa Grove and Arthur. The county's median home was built in 1967.
41/100 Water Damage Risk Index: Moderate Douglas County ranks 83 of 102 Illinois counties. See the statewide ranking and method.The three factors where Douglas County ranks highest compared with other Illinois counties.
For frozen pipes, Douglas County is a typical Illinois county, which is still plenty. It averaged 103 freezing nights a year over 2015–2024, 32 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 102 Illinois counties that's 57th.
The longest cold spell was straight 15 days without the temperature rising above freezing, ending in February 2021. The coldest night reached about -12°F on January 31, 2019. Burst pipes usually show up when a spell like that breaks and the ice thaws.
Expect the hardest freezes in January, inside a season that runs November to March. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
On average the first fall freeze arrives around Oct 25 and the last spring freeze around Apr 17.
Douglas gets fewer downpours than most Illinois counties, but they still fill basements. About 7.1 days a year bring an inch or more (79th of 102), most often in June, out of 39.9 inches of total precipitation. On December 27, 2015, 3.25 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 5.57 inches (through December 29, 2015).
About 80 days a year swing from below freezing at night to above freezing by day. Those freeze-thaw cycles feed ice dams on roofs, open cracks in foundations and driveways, and stress pipes that are already marginal.
Housing
68% of homes in Douglas County predate 1980, close to the Illinois county median of 65.9%, which ranks 44th of Illinois's 102 counties.
Older and newer homes sit side by side here: 41% predate 1960 and 14% are from 2000 or later. Corroded pipe is the typical failure in the first group, burst supply hoses in the second.
Beyond water
Douglas County averages 49 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in June. Keep indoor humidity under 60%, as the EPA advises, and dry any leak within 24 to 48 hours; in a humid month a wet basement left alone won't dry by itself.
Mold remediation: what to expectMain heating fuel in Douglas County's occupied homes: 54% utility gas, 31% electric, 11% propane and 2% wood. Fires here are likelier to start in the kitchen or the wiring than in the furnace. After any fire, keep the HVAC off until ducts are checked, or soot will travel through the house.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Douglas County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Champaign and Piatt get more pipe-freeze nights than Douglas. Edgar County has the oldest housing nearby, with 76% of homes built before 1980.
By the numbers
| Factor | Douglas | Illinois median | Rank |
|---|---|---|---|
| Homes built before 1960 | 41% | 38% | 48 of 102 |
| Homes built before 1980 | 68% | 66% | 44 of 102 |
| Homes built 2000 or later | 14% | 15% | 56 of 102 |
| Manufactured or mobile homes | 3.9% | 5.6% | 62 of 102 |
| Vacant homes | 8.7% | 11% | 72 of 102 |
| Wood or propane heat | 13% | 17% | 66 of 102 |
| Nights at 20°F or colder | 32/yr | 35/yr | 57 of 102 |
| Days with 1 inch+ of rain | 7.1/yr | 8.4/yr | 79 of 102 |
| Freeze-thaw days | 80/yr | 81/yr | 55 of 102 |
| Muggy nights (65°F+) | 49/yr | 51/yr | 58 of 102 |
Rank 1 is the highest value. Bars run from the lowest to the highest Illinois county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Douglas County: freezing from November to March, heavy rain in January, May and June.
Sources: U.S. Census Bureau, ACS 2024 5-year estimates (2020-2024); weather from NOAA nClimGrid-Daily county averages (EpiNOAA), 2015–2024, averaged across the county; county boundaries from Census TIGER. Reviewed 2026-10-21. Methodology