Frost history / Rock Springs 3 Sw, WI
Rock Springs 3 Sw, WI: frost dates by year
Last spring and first fall frost at NOAA station USC00477319, 1992 to 2001, measured from daily minimum temperatures.
Elevation 1,260 ft, 43.445, -89.970. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 27 | Oct 9 |
| Earliest | Apr 9 (1999) | Sep 25 (2001) |
| Latest | May 13 (1997) | Nov 1 (1994) |
| Trend | 20.8 days earlier per decade | 18.2 days earlier per decade |
| Years with data | 10 | 10 |
At 28°F (hard freeze) the median last spring date is Apr 12 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 |
|---|---|---|---|---|
| 2001 | Apr 18 | Sep 25 | Apr 17 | Sep 25 |
| 2000 | Apr 17 | Oct 6 | Apr 13 | Oct 7 |
| 1999 | Apr 9 | Oct 4 | Mar 26 | Oct 24 |
| 1998 | Apr 28 | Oct 13 | Mar 24 | Nov 4 |
| 1997 | May 13 | Oct 14 | Apr 17 | Oct 22 |
| 1996 | May 1 | Oct 3 | Apr 9 | Oct 3 |
| 1995 | Apr 25 | Oct 16 | Apr 10 | Nov 2 |
| 1994 | May 7 | Nov 1 | Apr 7 | Nov 1 |
| 1993 | Apr 26 | Oct 1 | Apr 21 | Oct 29 |
| 1992 | May 6 | Oct 17 | Apr 13 | Oct 17 |
"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.