Frost history / Enterprise 20 Nne, OR
Enterprise 20 Nne, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00352678, 1969 to 2003, measured from daily minimum temperatures.
Elevation 3,280 ft, 45.708, -117.153. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 27 | Aug 28 |
| Earliest | May 28 (1995) | Aug 1 (1987) |
| Latest | Jul 22 (1984) | Sep 16 (1985) |
| Trend | 3.0 days earlier per decade | 1.5 days later per decade |
| Years with data | 33 | 35 |
At 28°F (hard freeze) the median last spring date is May 31 and the median first fall date is Sep 12.
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 |
|---|---|---|---|---|
| 2003 | Jun 23 | Sep 12 | May 19 | Sep 13 |
| 2002 | Jun 1 | Aug 3 | May 11 | Sep 23 |
| 2001 | Jun 19 | Sep 8 | May 30 | Sep 8 |
| 2000 | no data | Aug 21 | no data | Sep 21 |
| 1999 | Jul 7 | Sep 1 | Jun 7 | Sep 1 |
| 1998 | May 29 | Aug 17 | Apr 18 | Oct 4 |
| 1997 | Jul 11 | Sep 11 | May 21 | Sep 18 |
| 1996 | Jul 6 | Aug 6 | Jun 19 | Sep 6 |
| 1995 | May 28 | Aug 13 | May 14 | Sep 21 |
| 1994 | Jul 4 | Sep 11 | Jun 17 | Sep 12 |
| 1993 | Jul 13 | Aug 25 | May 9 | Aug 26 |
| 1992 | Jun 14 | Aug 24 | May 21 | Aug 24 |
| 1991 | Jun 18 | Sep 14 | Jun 4 | Sep 14 |
| 1990 | Jun 15 | Sep 13 | May 19 | Sep 22 |
| 1989 | Jun 21 | Sep 6 | May 26 | Sep 10 |
| 1988 | Jun 30 | Aug 21 | Jun 6 | Sep 12 |
| 1987 | Jun 24 | Aug 1 | Jun 2 | Sep 16 |
| 1986 | Jun 19 | Sep 12 | May 23 | Sep 12 |
| 1985 | Jun 26 | Sep 16 | May 13 | Sep 20 |
| 1984 | Jul 22 | Sep 12 | Jun 1 | Sep 13 |
| 1983 | Jul 16 | Sep 6 | Jun 20 | Sep 10 |
| 1982 | Jul 22 | Aug 2 | Jun 9 | Sep 11 |
| 1981 | Jul 8 | Aug 22 | Jul 8 | Sep 3 |
| 1980 | Jun 7 | Aug 4 | Apr 17 | Aug 29 |
| 1979 | Jul 3 | Sep 10 | Jun 8 | Sep 11 |
| 1978 | Jun 26 | Aug 18 | Jun 16 | Sep 17 |
| 1977 | Jul 7 | Aug 31 | Jul 5 | Sep 9 |
| 1976 | Jun 27 | Aug 27 | Jun 26 | Sep 8 |
| 1975 | Jun 28 | Sep 2 | May 28 | Sep 18 |
| 1974 | Jun 10 | Sep 2 | May 31 | Sep 13 |
| 1973 | Jul 12 | Aug 28 | Jun 10 | Sep 2 |
| 1972 | Jul 3 | Aug 31 | May 11 | Sep 22 |
| 1971 | Jul 7 | Aug 24 | Jul 7 | Sep 12 |
| 1970 | May 31 | Aug 14 | May 15 | Sep 9 |
| 1969 | no data | Aug 6 | no data | Aug 29 |
"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.