Gutters, roofing, siding and windows in Dennison, MN

• Gutters in Dennison

  Goodhue County averages 35.7 inches of precipitation a year (NOAA 1991–2020 normals). One inch of rain on 1,000 square feet of roof is about 623 gallons of water for the gutters to carry.

• Roofing in Dennison

  17 of the 28 hail events on record within 10 miles of Dennison from 2016 through March 31, 2026 had hail 1.5 inches or larger. The National Weather Service counts hail of 1 inch or larger as severe.

• Siding in Dennison

  The strongest thunderstorm wind on record within 10 miles of Dennison from 2016 through September 22, 2025 was 110 mph. The National Weather Service counts a thunderstorm wind of 58 mph or more as severe.

• Windows in Dennison

  59% of homes in ZIP code 55018 were built before 1980. A home built before 1980 was built before the energy codes in force today were written.

Source: NOAA Storm Events Database (hail events through March 31, 2026; thunderstorm-wind and tornado events through September 22, 2025); American Community Survey 2023, 5-year; NOAA 1991–2020 climate normals.

Our pages cover 1 ZIP code of Dennison: 55018. ZIP code 55018 has 398 households; its median home was built in 1969, and 94% of its housing units are single-family detached. The median home value in ZIP code 55018 is $316,300, and 87% of its occupied homes are owner-occupied. The median owner-occupied home in Dennison is valued at $215,600.

• ZIP code 55018

Source: American Community Survey 2023, 5-year, by ZIP Code Tabulation Area (a ZIP code can extend beyond the city); ZIP list from Census place and ZIP Code Tabulation Area boundaries.

The NOAA Storm Events Database records 28 hail events, 33 thunderstorm-wind events and 9 tornadoes within 10 miles of Dennison from 2016 through March 31, 2026 for hail and through September 22, 2025 for thunderstorm wind and tornadoes. The largest hail on record there in that period was 3.5 inches on July 13, 2024, near Nerstrand. 17 of those hail events had hail 1.5 inches or larger.

The closest event to the center of Dennison was 60 mph wind on May 24, 2018, less than 1 mile away near Dennison. The most recent hail event within 10 miles of Dennison was on September 19, 2024: 1 in hail near Northfield. The most recent thunderstorm-wind event within 10 miles of Dennison was on July 28, 2025, near Cannon Falls. The strongest thunderstorm wind recorded within 10 miles of Dennison in that period was 110 mph. The busiest year was 2018, with 17 events in all.

Source: NOAA Storm Events Database (hail events through March 31, 2026; thunderstorm-wind and tornado events through September 22, 2025).

Source: NOAA Storm Events Database (hail events through March 31, 2026; thunderstorm-wind and tornado events through September 22, 2025).

Source: NOAA Storm Events Database (hail events through March 31, 2026; thunderstorm-wind and tornado events through September 22, 2025).

Goodhue County has 21,071 housing units, and 70% of them are single-family detached homes (American Community Survey 2023, 5-year). Another 5% are attached homes such as townhomes. Mobile homes make up 6% of the housing units.

The median home in Goodhue County was built in 1974. 59% of homes in Goodhue County were built before 1980, and 20% were built in 2000 or later. The most common building period is 1939 or earlier, with 5,146 homes.

78% of occupied homes in Goodhue County are owner-occupied. The median owner-occupied home in Goodhue County is valued at $269,400. Among occupied homes in Goodhue County, 56% heat with utility gas, 17% with electricity, 22% with bottled or tank gas, 1% with fuel oil and 3% with wood.

• Year-built table and more on the Goodhue County page

Source: American Community Survey 2023, 5-year (tables B25024, B25034, B25035, B25003, B25077, B25040).

Dennison is in Goodhue County, so the county ratings below apply to it. Goodhue County scores 80.2 of 100 for hail in FEMA's National Risk Index, which ranks 22nd of 87 Minnesota counties. Goodhue County scores 82.7 of 100 for strong wind in FEMA's National Risk Index, which ranks 19th of 87 Minnesota counties. Goodhue County scores 50 of 100 for winter weather in FEMA's National Risk Index, which ranks 65th of 87 Minnesota counties. Of the perils listed here, the highest score in Goodhue County is for tornado, at 88.2 of 100.

Goodhue County averages 35.7 inches of precipitation a year (NOAA 1991–2020 normals). The average annual temperature in Goodhue County is 44.9°F.

Source: FEMA National Risk Index, 2026 release; rank among the state's counties computed from the scores; NOAA 1991–2020 climate normals.

The nearest other cities we serve, by straight-line distance, are Nerstrand (4.8 miles), Northfield (7.6 miles), Randolph (8.1 miles), Dundas (8.7 miles), Cannon Falls (9.5 miles), Kenyon (9.7 miles), Hampton (14 miles) and Wanamingo (14 miles). The other Goodhue County communities we serve are Bellechester, Cannon Falls, Frontenac, Goodhue, Kenyon, Pine Island, Red Wing, Wanamingo and Zumbrota.

• Nerstrand 4.8 mi
• Northfield 7.6 mi
• Randolph 8.1 mi
• Dundas 8.7 mi
• Cannon Falls 9.5 mi
• Kenyon 9.7 mi
• Hampton 14 mi
• Wanamingo 14 mi
• New Trier 14 mi
• Faribault 14 mi

Our Farmington office is at 821 3rd St, Farmington, MN 55024, about 17 miles from Dennison. Its hours are Monday–Friday 7:00 AM–7:00 PM. You can reach that office at (651) 998-8500.

• Farmington office: address, hours and map