Last Frost Day

Frost history / Mckenzie Rvr Rs, OR

Mckenzie Rvr Rs, OR: frost dates by year

Last spring and first fall frost at NOAA station USC00355362, 1955 to 2025, measured from daily minimum temperatures.

Elevation 1,478 ft, 44.179, -122.116. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianMay 14Oct 11
EarliestApr 20 (2007)Aug 18 (1973)
LatestJul 9 (1963)Nov 18 (2016)
Trend4.2 days earlier per decade5.6 days later per decade
Years with data3634

At 28°F (hard freeze) the median last spring date is Apr 17 and the median first fall date is Oct 29.

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)

Apr 15Apr 30May 15May 30Jun 14Jun 29Jul 1419601970198019902000201020201955: Jun 161956: May 31957: May 31960: May 231961: Apr 271962: May 141963: Jul 91964: May 251966: Jun 11968: May 81970: May 211971: May 181972: May 251974: May 301975: May 251976: Jun 261977: May 291978: May 61979: May 301982: May 191985: Jun 242006: May 92007: Apr 202009: May 132010: Apr 252012: May 182013: May 222014: Apr 212015: May 72016: Apr 262017: May 72018: Apr 232021: May 82023: Apr 202024: Apr 222025: May 5

First fall frost (32°F)

Aug 13Aug 28Sep 12Sep 27Oct 12Oct 27Nov 11Nov 2619601970198019902000201020201956: Sep 21959: Oct 161960: Aug 291961: Sep 221962: Oct 51963: Oct 191964: Sep 91965: Sep 71967: Oct 171968: Oct 21969: Sep 51970: Sep 141972: Sep 111973: Aug 181974: Sep 151975: Nov 11976: Sep 71979: Oct 312005: Oct 272006: Oct 262008: Oct 112010: Oct 182011: Oct 252013: Oct 42014: Nov 112015: Oct 222016: Nov 182017: Oct 92018: Oct 112021: Oct 72022: Oct 272023: Oct 262024: Oct 182025: Oct 15

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

YearLast spring 32°FFirst fall 32°FLast spring 28°FFirst fall 28°F
2025May 5Oct 15Apr 3Nov 21
2024Apr 22Oct 18Apr 17Oct 24
2023Apr 20Oct 26Apr 15Oct 27
2022no dataOct 27no dataNov 9
2021May 8Oct 7Apr 15Oct 12
2018Apr 23Oct 11Apr 3Nov 8
2017May 7Oct 9Feb 28Oct 31
2016Apr 26Nov 18Feb 23Dec 7
2015May 7Oct 22Apr 3Nov 22
2014Apr 21Nov 11Mar 24Nov 12
2013May 22Oct 4May 1Oct 29
2012May 18no dataApr 7no data
2011no dataOct 25no dataOct 25
2010Apr 25Oct 18Apr 10Nov 21
2009May 13no dataApr 30no data
2008no dataOct 11no dataDec 5
2007Apr 20no dataApr 3no data
2006May 9Oct 26Mar 20Oct 31
2005no dataOct 27no dataNov 28
1985Jun 24no dataMay 14no data
1982May 19no dataMay 5no data
1979May 30Oct 31Apr 20Nov 1
1978May 6no dataApr 13no data
1977May 29no dataMay 12no data
1976Jun 26Sep 7Apr 24Oct 17
1975May 25Nov 1Apr 29Nov 12
1974May 30Sep 15Apr 26Oct 3
1973no dataAug 18no dataSep 1
1972May 25Sep 11May 1Sep 27
1971May 18no dataApr 19no data
1970May 21Sep 14Apr 17Sep 14
1969no dataSep 5no dataOct 11
1968May 8Oct 2May 7Oct 8
1967no dataOct 17no dataNov 16
1966Jun 1no dataApr 29no data
1965no dataSep 7no dataSep 17
1964May 25Sep 9May 23Nov 6
1963Jul 9Oct 19Apr 2Oct 26
1962May 14Oct 5Apr 3Oct 5
1961Apr 27Sep 22Apr 7Oct 29
1960May 23Aug 29Apr 23Sep 21
1959no dataOct 16no dataOct 30
1957May 3no dataMar 26no data
1956May 3Sep 2Apr 17Sep 22
1955Jun 16no dataMay 7no data

"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.