Frost history / Monument 2, OR
Monument 2, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00355711, 1961 to 2016, measured from daily minimum temperatures.
Elevation 1,995 ft, 44.819, -119.420. 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 (1969) | Aug 17 (1969) |
| Latest | Jun 26 (1976) | Oct 19 (1963) |
| Trend | 3.9 days earlier per decade | 0.9 days earlier per decade |
| Years with data | 25 | 27 |
At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Oct 9.
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 |
|---|---|---|---|---|
| 2016 | no data | Sep 13 | no data | Oct 12 |
| 1988 | May 7 | no data | May 2 | no data |
| 1987 | May 21 | Sep 16 | Apr 20 | Oct 10 |
| 1986 | May 16 | Oct 2 | May 14 | Oct 11 |
| 1985 | May 13 | Sep 23 | May 12 | Oct 8 |
| 1984 | Jun 2 | Sep 24 | Apr 28 | Oct 16 |
| 1983 | May 14 | Sep 20 | Apr 14 | Sep 20 |
| 1982 | May 19 | Sep 15 | May 5 | Sep 30 |
| 1981 | May 12 | Sep 24 | Apr 14 | Oct 14 |
| 1980 | May 23 | Sep 22 | Apr 12 | Oct 17 |
| 1979 | May 30 | Oct 3 | Apr 20 | Nov 9 |
| 1978 | May 17 | Sep 16 | Apr 24 | Oct 13 |
| 1977 | May 29 | Oct 3 | Apr 20 | Oct 10 |
| 1976 | Jun 26 | Sep 8 | Apr 17 | Oct 16 |
| 1975 | May 26 | Sep 20 | May 25 | Oct 24 |
| 1974 | May 17 | Sep 14 | May 17 | Oct 3 |
| 1973 | Jun 18 | Sep 16 | May 2 | Oct 2 |
| 1972 | May 24 | Sep 25 | May 1 | Sep 26 |
| 1971 | May 21 | Sep 14 | Apr 22 | Sep 18 |
| 1970 | May 14 | Sep 12 | May 14 | Sep 14 |
| 1969 | May 5 | Aug 17 | May 2 | Oct 4 |
| 1968 | May 16 | Sep 22 | May 7 | Sep 22 |
| 1967 | May 26 | Oct 6 | Apr 29 | Oct 20 |
| 1966 | Jun 1 | Oct 3 | May 23 | Oct 9 |
| 1965 | no data | Sep 17 | no data | Sep 17 |
| 1963 | May 24 | Oct 19 | May 24 | Oct 19 |
| 1962 | Jun 4 | Sep 9 | May 5 | Oct 5 |
| 1961 | no data | Sep 22 | no data | Sep 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.