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First and last freeze dates in Lone Rock, WI

The first freeze of fall (a low of 32°F or colder) typically comes around Oct 6, and the last freeze of spring around May 6.

This fall so far (data through Oct 16, 2026): first freeze (32°F or colder) Oct 16 at this station. Observed data, can lag a day or two.

Oct 6Median first fall freeze (≤32°F)

May 6Median last spring freeze (≤32°F)

152Median freeze-free days between

First and last freeze dates in Lone Rock

Threshold	Event	Median date	Typical range (10th–90th pct)	Earliest / latest	Years with one
32°F or colder (freeze)	First in fall	Oct 6	Sep 26 – Oct 15	Sep 15 (2007) / Oct 28 (2017)	100%
32°F or colder (freeze)	Last in spring	May 6	Apr 22 – May 19	–	100%
28°F or colder (hard freeze)	First in fall	Oct 18	Oct 5 – Oct 28	Sep 24 (2012) / Oct 31 (2014)	100%
28°F or colder (hard freeze)	Last in spring	Apr 20	Apr 12 – May 4	–	100%

Based on the station’s daily minimum temperature, 1995–2024. “Freeze” here means a daily low at or below the threshold, which is not the same as visible frost. Your yard can differ by several degrees and days from an airport weather station, so use these as planning odds, not guarantees.

The median stretch between the last spring freeze and the first fall freeze (the freeze-free season) was about 152 days.

Nearby weather stations

Source station: Lone Rock Tri Co Ap (USW00014921), elevation 715 ft. Data: NOAA NCEI GHCN-Daily. Computed by First Snow Dates; how we calculate this. Historical averages only; for a forecast see weather.gov.

Planning for winter? Heat pump vs gas furnace, propane and oil: heating cost in Wisconsin (on our sister site PlugVsPump, from EIA prices).