Bond County, Illinois · Greenville
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Bond County averages 27 nights a year at 20°F or colder, mostly November to February, and 34% of its homes predate 1960.
July brings the most downpours to Bond County, part of 9.6 heavy-rain days a year. Check the sump first.
34% 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 Bond County, 3.94 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
29% of occupied homes in Bond County heat mainly with wood or propane, above the Illinois county median of 16.5%.
Muggy summer nights, lows of 65°F or more, come about 62 times a year in Bond County. Mold after a leak spreads fastest from June through August.
Local risk profile
Bond County covers 380 square miles of central Illinois, with about 16,716 residents and 6,899 homes. Besides Greenville, the county seat, the biggest communities are Pocahontas, Mulberry Grove and Keyesport. The county's median home was built in 1975.
44/100 Water Damage Risk Index: Moderate Bond County ranks 75 of 102 Illinois counties. See the statewide ranking and method.The three factors where Bond County ranks highest compared with other Illinois counties.
Bond County is milder than most of Illinois, but not mild enough to skip winterizing. From 2015–2024 it averaged 27 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 91 nights at or below 32°F. That ranks 71st of 102 counties.
Cold snaps are the real risk. The worst in the record lasted 14 days below freezing (ending January 2018), and the low bottomed out near -7°F on January 31, 2019.
Most freezing nights fall from November to February, peaking in January. Disconnect garden hoses and shut off outdoor spigots before the first hard frost, and keep the heat at 55°F or higher if you'll be away.
On average the first fall freeze arrives around Oct 25 and the last spring freeze around Apr 13.
Rainfall is about average for Illinois. About 9.6 days a year bring an inch or more (35th of 102), most often in July, out of 44 inches of total precipitation. On December 27, 2015, 3.94 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 7.34 inches (through December 29, 2015).
About 73 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
Illinois's 102 counties range widely in housing age; Bond ranks 77th, with 58% of its homes built before 1980.
Housing age is mixed: 34% of homes are pre-1960 and 17% are 2000 or newer. Ask any plumber which era your house is from and you'll know which failures to watch for.
About 25% of homes went up between 1980 and 1999. Some houses from the late 1970s to the mid-1990s were plumbed with polybutylene, a gray plastic pipe known for failing at fittings. A plumber can tell you in a few minutes whether you have it.
11% of homes are manufactured or mobile homes, above the Illinois county median of 5.6%. Their water lines run under the floor behind the skirting, so a torn skirt or failed heat tape freezes them faster than lines in a site-built house.
Beyond water
About 62 nights a year in Bond County stay at 65°F or warmer, a sign of muggy summer air (34th of 102 counties). July is the wettest month. The EPA recommends keeping indoor humidity below 60%, ideally 30 to 50%. Basements can pass 60% on their own in summer, so a dehumidifier matters even without a leak, and anything wet should be dried within 24 to 48 hours.
Mold remediation: what to expectMain heating fuel in Bond County's occupied homes: 39% utility gas, 29% electric, 28% propane and 1% wood. Propane heat is more common here than the state median. Have chimneys swept and fuel-burning appliances serviced each fall, and keep three feet clear around stoves and space heaters.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Bond County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Fayette and Montgomery get more pipe-freeze nights than Bond. Montgomery County has the oldest housing nearby, with 71% of homes built before 1980.
By the numbers
| Factor | Bond | Illinois median | Rank |
|---|---|---|---|
| Homes built before 1960 | 34% | 38% | 73 of 102 |
| Homes built before 1980 | 58% | 66% | 77 of 102 |
| Homes built 2000 or later | 17% | 15% | 31 of 102 |
| Manufactured or mobile homes | 11% | 5.6% | 25 of 102 |
| Vacant homes | 11% | 11% | 49 of 102 |
| Wood or propane heat | 29% | 17% | 14 of 102 |
| Nights at 20°F or colder | 27/yr | 35/yr | 71 of 102 |
| Days with 1 inch+ of rain | 9.6/yr | 8.4/yr | 35 of 102 |
| Freeze-thaw days | 73/yr | 81/yr | 71 of 102 |
| Muggy nights (65°F+) | 62/yr | 51/yr | 34 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 Bond County: freezing from November to February, heavy rain in April, July and August.
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