Rex 1 S, OR: frost dates by year

Last spring and first fall frost at NOAA station USC00357127, 1975 to 2024, measured from daily minimum temperatures.

Elevation 515 ft, 45.303, -122.913. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 2	Nov 15
Earliest	Feb 2 (2016)	Oct 25 (2020)
Latest	Apr 19 (2011)	Dec 5 (2017)
Trend	2.7 days later per decade	2.5 days earlier per decade
Years with data	14	16

At 28°F (hard freeze) the median last spring date is Mar 1 and the median first fall date is Nov 22.

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
2024	Mar 8	Nov 8	Mar 7	Nov 8
2023	no data	Oct 28	no data	Nov 29
2022	Apr 15	Nov 7	Apr 14	Nov 20
2021	Apr 11	Nov 21	Mar 16	Nov 21
2020	Apr 3	Oct 25	Feb 4	Nov 9
2019	Mar 13	Oct 29	Mar 11	Nov 29
2018	Apr 2	Dec 3	Feb 23	none
2017	Apr 3	Dec 5	Feb 23	Dec 12
2016	Feb 2	Dec 5	Jan 4	Dec 7
2015	Apr 15	Nov 23	Jan 2	Nov 23
2014	Mar 27	Nov 12	Feb 9	Nov 13
2013	Mar 23	Nov 20	Mar 22	Nov 21
2012	Apr 6	Nov 10	Mar 7	Dec 31
2011	Apr 19	Nov 1	Feb 27	Nov 2
1976	Mar 12	Nov 27	Mar 3	none
1975	no data	Nov 18	no data	Dec 12

"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.