Langlois #2, OR: frost dates by year

Last spring and first fall frost at NOAA station USC00354721, 1996 to 2024, measured from daily minimum temperatures.

Elevation 90 ft, 42.924, -124.453. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 7	Nov 25
Earliest	Jan 24 (1997)	Oct 29 (2023)
Latest	Apr 16 (2022)	Dec 18 (1997)
Trend	10.9 days later per decade	3.1 days earlier per decade
Years with data	17, 1 with no freeze	15, 2 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 22 and the median first fall date is Dec 8.

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	no data	none	no data
2023	no data	Oct 29	no data	none
2022	Apr 16	Nov 4	Feb 25	none
2021	no data	Dec 14	no data	none
2019	no data	Nov 27	no data	Nov 29
2018	Apr 3	Dec 3	Feb 23	none
2017	Mar 5	no data	Jan 13	no data
2016	Feb 1	no data	none	no data
2015	no data	Nov 25	no data	none
2010	Mar 9	no data	none	no data
2009	Mar 30	no data	none	no data
2008	no data	Dec 15	no data	Dec 16
2007	Feb 2	Nov 21	Jan 14	none
2006	Mar 12	no data	Feb 20	no data
2005	Feb 15	no data	Jan 4	no data
2004	none	Nov 21	none	none
2003	Feb 25	Oct 31	none	Nov 1
2002	Mar 18	Oct 30	Jan 29	none
2001	Apr 9	none	none	none
2000	Jan 28	no data	none	no data
1998	Mar 6	Dec 5	none	Dec 19
1997	Jan 24	Dec 18	Jan 14	none
1996	no data	none	no data	none

"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.