Frost history / Drummond, WI
Drummond, WI: frost dates by year
Last spring and first fall frost at NOAA station USC00472240, 1963 to 2004, measured from daily minimum temperatures.
Elevation 1,340 ft, 46.333, -91.267. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 30 | Sep 23 |
| Earliest | May 5 (1968) | Aug 3 (1971) |
| Latest | Jul 4 (1972) | Oct 10 (1997) |
| Trend | 4.0 days earlier per decade | 4.3 days later per decade |
| Years with data | 31 | 33 |
At 28°F (hard freeze) the median last spring date is May 15 and the median first fall date is Oct 2.
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 |
|---|---|---|---|---|
| 2004 | no data | Oct 2 | no data | Oct 5 |
| 2003 | May 24 | Sep 29 | May 3 | Oct 2 |
| 2002 | May 21 | Sep 24 | May 20 | Oct 7 |
| 2001 | May 12 | Sep 25 | Apr 18 | Oct 5 |
| 2000 | Jun 5 | Sep 24 | May 19 | Sep 24 |
| 1999 | May 14 | Sep 21 | Apr 29 | Oct 3 |
| 1998 | May 22 | Oct 1 | May 22 | Oct 21 |
| 1997 | May 27 | Oct 10 | May 16 | Oct 21 |
| 1996 | May 30 | Oct 3 | May 12 | Oct 3 |
| 1995 | May 26 | Sep 8 | May 2 | Sep 23 |
| 1994 | Jun 2 | no data | May 7 | no data |
| 1993 | May 16 | Sep 29 | May 16 | Oct 2 |
| 1992 | Jun 21 | Sep 19 | May 26 | Sep 28 |
| 1991 | May 19 | Sep 20 | May 3 | Oct 10 |
| 1990 | no data | Sep 17 | no data | Oct 9 |
| 1989 | Jun 15 | Sep 23 | May 12 | Sep 23 |
| 1988 | no data | Sep 6 | no data | Oct 5 |
| 1987 | no data | Sep 25 | no data | Oct 3 |
| 1986 | no data | Sep 7 | no data | Oct 6 |
| 1985 | Jun 3 | no data | May 1 | no data |
| 1984 | May 29 | Sep 26 | May 29 | Sep 29 |
| 1983 | May 26 | Sep 23 | May 26 | Sep 23 |
| 1982 | Jun 2 | Sep 21 | Apr 27 | Oct 21 |
| 1981 | May 19 | Sep 22 | May 18 | Sep 22 |
| 1980 | Jun 16 | Sep 17 | Apr 28 | Sep 26 |
| 1973 | May 30 | no data | May 30 | no data |
| 1972 | Jul 4 | Sep 5 | Jun 23 | Sep 22 |
| 1971 | Jun 9 | Aug 3 | Jun 8 | Sep 16 |
| 1970 | Jun 21 | Aug 21 | Jun 19 | Sep 14 |
| 1969 | Jun 13 | Sep 9 | May 25 | Sep 9 |
| 1968 | May 5 | Sep 28 | May 5 | Oct 24 |
| 1967 | May 31 | Sep 24 | May 15 | Sep 29 |
| 1966 | May 30 | Sep 25 | May 10 | Oct 12 |
| 1965 | May 29 | Sep 26 | Apr 28 | Sep 26 |
| 1964 | Jun 16 | Sep 12 | Apr 26 | Sep 15 |
| 1963 | Jun 12 | Sep 13 | May 22 | Sep 13 |
"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.