Frost history / Rhinelander 4NE, WI
Rhinelander 4NE, WI: frost dates by year
Last spring and first fall frost at NOAA station USC00477115, 2011 to 2024, measured from daily minimum temperatures.
Elevation 1,586 ft, 45.653, -89.308. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 21 | Sep 20 |
| Earliest | May 5 (2024) | Sep 6 (2011) |
| Latest | Jun 8 (2016) | Oct 22 (2021) |
| Trend | 15.2 days earlier per decade | 24.1 days later per decade |
| Years with data | 13 | 14 |
At 28°F (hard freeze) the median last spring date is May 13 and the median first fall date is Oct 10.
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 |
|---|---|---|---|---|
| 2024 | May 5 | Oct 7 | Apr 26 | Oct 16 |
| 2023 | May 18 | Oct 8 | Apr 27 | Oct 29 |
| 2022 | May 23 | Sep 28 | May 23 | Sep 28 |
| 2021 | May 29 | Oct 22 | May 29 | Oct 23 |
| 2020 | May 14 | Sep 18 | May 13 | Oct 16 |
| 2019 | May 13 | Oct 12 | May 7 | Oct 25 |
| 2018 | May 21 | Sep 22 | May 12 | Oct 13 |
| 2017 | May 9 | Sep 8 | May 8 | Oct 11 |
| 2016 | Jun 8 | Oct 9 | May 17 | Oct 9 |
| 2015 | Jun 2 | Sep 12 | May 22 | Sep 30 |
| 2014 | May 17 | Sep 12 | May 17 | Sep 12 |
| 2013 | Jun 3 | Sep 16 | May 24 | Sep 17 |
| 2012 | Jun 1 | Sep 15 | May 10 | Sep 19 |
| 2011 | no data | Sep 6 | no data | Sep 16 |
"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.