Otis 2 Ne, OR: frost dates by year

Last spring and first fall frost at NOAA station USC00356366, 1951 to 2023, measured from daily minimum temperatures.

Elevation 150 ft, 45.033, -123.924. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 19	Nov 9
Earliest	Feb 1 (2016)	Sep 27 (1999)
Latest	May 13 (1989)	Dec 23 (1974)
Trend	3.5 days earlier per decade	0.7 days later per decade
Years with data	72	72

At 28°F (hard freeze) the median last spring date is Feb 19 and the median first fall date is Nov 30.

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
2023	Apr 12	no data	Mar 1	no data
2022	Apr 17	Nov 9	Feb 25	Nov 20
2021	Apr 11	Nov 22	none	Dec 28
2020	Apr 4	Oct 26	none	none
2019	Apr 28	Oct 28	Mar 10	Nov 30
2018	Apr 3	Dec 5	Feb 23	none
2017	Mar 19	Dec 5	Jan 15	none
2016	Feb 1	Dec 7	Jan 3	Dec 8
2015	Mar 4	Nov 23	Jan 2	Nov 29
2014	Mar 22	Nov 14	Feb 7	Nov 16
2013	May 1	Nov 20	Jan 22	Nov 21
2012	May 10	Nov 10	Mar 7	none
2011	Apr 18	Nov 4	Feb 26	Dec 7
2010	Apr 14	Nov 21	none	Nov 23
2009	Apr 24	Dec 3	Mar 11	Dec 5
2008	Apr 21	Oct 23	Apr 1	Dec 15
2007	Apr 19	Nov 2	Feb 1	none
2006	no data	Oct 30	no data	Oct 31
2005	Feb 20	Nov 8	Jan 11	Dec 6
2004	Apr 1	Nov 4	Jan 6	none
2003	Mar 24	Oct 31	Feb 25	Oct 31
2002	May 8	Nov 2	Mar 2	Nov 2
2001	Apr 15	Oct 28	Feb 7	none
2000	Apr 24	Nov 11	none	Nov 11
1999	May 12	Sep 27	Mar 6	none
1998	Apr 13	Oct 30	none	Dec 19
1997	Apr 5	Dec 6	Jan 26	none
1996	Mar 27	Nov 23	Feb 26	Dec 19
1995	Mar 26	Oct 31	Feb 14	Dec 25
1994	Mar 22	Nov 3	Feb 19	Nov 17
1993	Feb 28	Nov 8	Feb 28	Nov 24
1992	Apr 23	Nov 24	none	none
1991	Apr 11	Oct 30	Mar 26	none
1990	Mar 13	Nov 19	Feb 19	Dec 19
1989	May 13	Dec 10	Feb 15	none
1988	Apr 25	Dec 1	Feb 2	Dec 17
1987	Apr 19	Nov 28	Jan 17	Dec 13
1986	Apr 24	Nov 25	Feb 9	none
1985	May 12	Oct 9	Feb 4	Nov 11
1984	Apr 26	Nov 22	Jan 20	Dec 6
1983	Apr 14	Nov 29	none	Dec 20
1982	May 3	Nov 9	Feb 10	Nov 24
1981	Apr 13	Nov 28	none	none
1980	Apr 7	Nov 11	Jan 31	Dec 7
1979	Mar 8	Nov 13	Feb 2	none
1978	Apr 6	Oct 30	Feb 11	Nov 10
1977	Apr 19	Nov 8	Jan 30	Nov 19
1976	Apr 21	Oct 20	Mar 5	Nov 27
1975	Apr 29	Nov 18	Mar 28	Dec 12
1974	Apr 13	Dec 23	Mar 8	Dec 23
1973	Apr 2	Nov 2	Feb 4	Nov 3
1972	May 1	Oct 17	Feb 3	Dec 4
1971	Apr 19	Oct 27	Mar 2	Oct 28
1970	Apr 27	Oct 26	Jan 11	Dec 18
1969	Apr 30	Nov 24	Mar 14	Nov 30
1968	Apr 21	Nov 4	Apr 13	Dec 19
1967	Apr 26	Nov 26	Mar 13	Dec 13
1966	Apr 19	Nov 8	Jan 22	none
1965	May 6	Nov 25	Mar 19	Dec 15
1964	May 3	Oct 26	Feb 25	Nov 14
1963	May 13	Nov 28	Jan 30	Dec 10
1962	May 4	Nov 23	Mar 28	Dec 24
1961	Apr 26	Nov 4	Jan 4	Nov 15
1960	Apr 22	Nov 26	Mar 3	Nov 27
1959	Apr 16	Nov 5	Feb 12	Nov 14
1958	May 13	Nov 15	none	Nov 16
1957	Apr 7	Nov 3	Feb 2	none
1956	Apr 17	Oct 28	Mar 12	Nov 29
1955	Apr 27	Nov 12	Mar 20	Nov 12
1954	May 1	Oct 24	Mar 31	Nov 29
1953	Apr 10	Nov 2	Mar 2	none
1952	May 4	Nov 15	Feb 18	Nov 22
1951	Apr 21	Oct 30	Mar 23	Dec 7

"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 1991–2020 frost probabilities.