Pell Lake, WI: frost dates by year

Last spring and first fall frost at NOAA station USC00476420, 2010 to 2025, measured from daily minimum temperatures.

Elevation 840 ft, 42.532, -88.332. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 5	Oct 11
Earliest	Apr 26 (2024)	Sep 24 (2012)
Latest	May 30 (2021)	Oct 26 (2017)
Trend	0.7 days later per decade	3.2 days later per decade
Years with data	15	16

At 28°F (hard freeze) the median last spring date is Apr 27 and the median first fall date is Oct 23.

The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.

Chart

Last spring frost (32°F)

First fall frost (32°F)

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

Year	Last spring 32°F	First fall 32°F	Last spring 28°F	First fall 28°F
2025	May 9	Oct 24	Apr 27	Oct 24
2024	Apr 26	Oct 16	Apr 26	Oct 17
2023	Apr 28	Oct 9	Apr 27	Oct 30
2022	Apr 28	Sep 29	Apr 28	Oct 8
2021	May 30	Oct 22	May 13	Oct 23
2020	May 13	Oct 5	May 9	Oct 5
2019	May 4	Oct 8	Apr 28	Oct 26
2018	Apr 30	Sep 29	Apr 29	Oct 13
2017	May 9	Oct 26	Apr 1	Nov 6
2016	May 15	Oct 13	May 15	Oct 14
2015	May 13	Oct 17	Apr 25	Oct 17
2014	no data	Oct 5	no data	Oct 11
2013	May 13	Oct 20	Apr 20	Oct 25
2012	Apr 27	Sep 24	Apr 12	Nov 3
2011	May 5	Oct 22	Apr 1	Oct 30
2010	Apr 28	Oct 4	Apr 10	Oct 22

"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.