Will Pipes Freeze in Anoka County, MN? 99 nights a Year
Freeze nights in Anoka County
In a normal year Anoka County, MN gets 99 nights at or below 20°F, the point where bare pipes in a garage, attic or outside wall start to freeze. That is more than 91% of US counties.
Risk level: Severe. The risk season runs October to April, worst in January.
It depends where the pipe is
| Pipe | Freezes near | Nights a year |
|---|---|---|
| Outdoor spigot, open crawlspace | 32°F | 168 nights |
| Bare pipe in garage, attic or outside wall | 20°F | 99 nights |
| Insulated pipe in unheated space | 10°F | 61 nights |
| Inside the heated house | 0°F | 35 nights |
Foam-sleeving a bare pipe in unheated space takes it from 99 nights of risk to 61 nights. A 12 ft heat-tape kit runs $17 to $37; an average burst-pipe repair is about $500.
Month by month
Nights at or below 20°F in a normal year.
First 32°F night is usually around 10/02, last around 05/05. For 20°F: 11/03 to 04/07.
How cold Anoka County nights get
Average winter (Dec-Feb) low: 8°F; the coldest month, January, averages 4°F overnight. 9 months normally bring at least one night below 32°F (Jan, Feb, Mar, Apr, May, Sep, Oct, Nov, Dec). Nights below 10°F, cold enough to freeze insulated pipe in an unheated space, come in January, February, March, November, December: 61 nights a year, and 35 nights below zero.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4°F | 8°F | 20°F | 33°F | 46°F | 55°F | 60°F | 58°F | 50°F | 37°F | 24°F | 12°F |
Anoka County next to its neighbours
Isanti County, MN, 32 km north, gets 103 nights below 20°F to Anoka County's 99 nights. Ramsey County, MN, 31 km south, gets 90 nights.
| County | Distance | Below 32°F | Below 20°F | Jan low |
|---|---|---|---|---|
| Anoka County, MN | - | 168 nights | 99 nights | 4°F |
| Ramsey County, MN | 31 km south | 155 nights | 90 nights | 7°F |
| Isanti County, MN | 32 km north | 171 nights | 103 nights | 4°F |
| Hennepin County, MN | 35 km southwest | 156 nights | 88 nights | 7°F |
| Chisago County, MN | 37 km northeast | 175 nights | 103 nights | 1°F |
| Washington County, MN | 38 km southeast | 158 nights | 94 nights | 6°F |
| Sherburne County, MN | 46 km northwest | 170 nights | 100 nights | 4°F |
Anoka County within MN
Anoka County ranks 52 of 87 MN counties for nights below 20°F. The most is St. Louis County, MN at 130 nights, with a 0°F average winter low. The fewest is Winona County, MN: 81 nights, winter lows near 12°F. At 909 ft, Anoka County sits 205 ft below the state's median county elevation of 1,114 ft.
What to do here
- Treat it as a building fix, not a night-of routine: insulate, heat tape, seal crawlspace vents.
- An automatic leak shutoff pays for itself if one burst is avoided.
- Know where the main shutoff is before the first hard freeze.
Interior pipes have a threshold too: the four freeze points.
Where this comes from
NOAA 1991-2020 climate normals, blended from 3 nearby stations and adjusted for elevation; closest is Andover (1 mi N), MN, 5 km away (close match). A normal year, not tonight's forecast: check the forecast low for the night itself. Why elevation is part of the blend: how county numbers are made.