Wright County, Minnesota · Buffalo
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Wright County averages 86 nights a year at 20°F or colder, mostly November to April, and 13% of its homes predate 1960.
August brings the most downpours to Wright County, part of 4.9 heavy-rain days a year. Check the sump first.
13% 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 Wright 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 Wright County heat mainly with wood or propane, below the Minnesota county median of 30%.
Muggy summer nights, lows of 65°F or more, come about 15 times a year in Wright County. Mold after a leak spreads fastest from June through August.
Local risk profile
About 148,269 people live in Wright County, 661 square miles in southern Minnesota, in roughly 57,416 homes. Buffalo is the county seat; Otsego, St. Michael and Monticello are the next largest communities. Much of its housing is recent, with a median build year of 1995.
33/100 Water Damage Risk Index: Moderate Wright County ranks 83 of 87 Minnesota counties. See the statewide ranking and method.The three factors where Wright County ranks highest compared with other Minnesota counties.
For frozen pipes, Wright County is a typical Minnesota county, which is still plenty. It averaged 157 freezing nights a year over 2015–2024, 86 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 87 Minnesota counties that's 49th.
The longest cold spell was straight 33 days without the temperature rising above freezing, ending in March 2019. The coldest night reached about -32°F on January 31, 2019. Burst pipes usually show up when a spell like that breaks and the ice thaws.
The freeze season here runs November to April, with January the coldest. If you travel then, leave the thermostat at 55°F or above and open sink cabinets on outside walls.
On average the first fall freeze arrives around Oct 13 and the last spring freeze around Apr 30.
Rainfall is about average for Minnesota. The county gets about 28.7 inches of rain and melted snow a year, with 4.9 days of an inch or more (54th of 87). Those downpours cluster in May, July and August, when sump pumps and gutters are tested hardest. The wettest day on record brought 3.25 inches on August 11, 2016. Multi-day storms matter most for basements; the wettest three days on record here totaled 4.07 inches (through October 3, 2017).
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 86 times a year here. They're the main driver of ice dams and of water working its way through foundation cracks in late winter.
Housing
Roughly 32% of the county's housing was built before 1980. That puts Wright among the newer housing stocks of Minnesota's 87 counties.
Growth since 2000 added 42% of today's homes. In houses that new, the weak points are washing machine hoses, ice maker lines, water heaters and sump pumps rather than the pipes in the walls.
27% date from 1980 to 1999, the window when polybutylene, a gray flexible plastic supply pipe, was used in some homes. It's prone to leaks at the fittings, so it's worth checking for in a house from those years.
Beyond water
About 15 nights a year in Wright County stay at 65°F or warmer, a sign of muggy summer air (37th of 87 counties). August 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 Wright County's occupied homes: 69% utility gas, 15% electric, 12% propane and 1% 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 Wright County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Meeker, Sherburne and Stearns get more pipe-freeze nights than Wright. Hennepin County has the oldest housing nearby, with 60% of homes built before 1980.
By the numbers
| Factor | Wright | Minnesota median | Rank |
|---|---|---|---|
| Homes built before 1960 | 13% | 34% | 81 of 87 |
| Homes built before 1980 | 32% | 58% | 84 of 87 |
| Homes built 2000 or later | 42% | 21% | 3 of 87 |
| Manufactured or mobile homes | 3.4% | 3.8% | 47 of 87 |
| Vacant homes | 5.9% | 11% | 69 of 87 |
| Wood or propane heat | 13% | 30% | 75 of 87 |
| Nights at 20°F or colder | 86/yr | 89/yr | 49 of 87 |
| Days with 1 inch+ of rain | 4.9/yr | 5.3/yr | 54 of 87 |
| Freeze-thaw days | 86/yr | 86/yr | 44 of 87 |
| Muggy nights (65°F+) | 15/yr | 13/yr | 37 of 87 |
Rank 1 is the highest value. Bars run from the lowest to the highest Minnesota county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Wright County: freezing from November to April, heavy rain in May, 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