Last Frost Day

Frost history / Longmire Rainier Nps, WA

Longmire Rainier Nps, WA: frost dates by year

Last spring and first fall frost at NOAA station USC00454764, 1979 to 2025, measured from daily minimum temperatures.

Elevation 2,762 ft, 46.749, -121.812. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianMay 19Oct 5
EarliestApr 17 (2016)Sep 7 (1992)
LatestJul 2 (2000)Nov 4 (2015)
Trend3.2 days earlier per decade1.3 days later per decade
Years with data4540

At 28°F (hard freeze) the median last spring date is Apr 16 and the median first fall date is Oct 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)

Mar 31Apr 15Apr 30May 15May 30Jun 14Jun 29Jul 14198019902000201020201979: May 301980: May 241981: May 131982: May 111983: May 161984: Jun 11985: May 221986: May 231987: May 211988: Jun 101989: May 271990: May 221991: May 101992: May 211993: May 91994: May 41995: May 191996: May 101997: May 71998: May 281999: May 302000: Jul 22001: May 72002: May 172003: May 192004: Apr 242005: Apr 202006: May 142007: May 212008: Jun 112010: May 242011: May 252012: May 202013: May 232014: May 72015: May 82016: Apr 172017: May 182018: Apr 232020: May 82021: May 232022: May 112023: Apr 262024: May 242025: May 5

First fall frost (32°F)

Aug 28Sep 12Sep 27Oct 12Oct 27Nov 11198019902000201020201979: Oct 311980: Oct 91981: Oct 41982: Sep 291983: Sep 191984: Sep 231985: Oct 71986: Sep 121987: Oct 111988: Sep 181989: Oct 151990: Oct 71991: Oct 181992: Sep 71993: Sep 211994: Oct 111995: Oct 131996: Sep 231997: Oct 61998: Oct 111999: Sep 272000: Sep 232001: Oct 102002: Oct 12004: Oct 232005: Oct 272006: Oct 232007: Sep 192008: Sep 232009: Oct 42010: Oct 52011: Oct 152012: Oct 32014: Oct 302015: Nov 42017: Oct 22018: Oct 32021: Sep 232022: Sep 182025: Oct 13

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 13Apr 17Dec 1
2024May 24no dataApr 17no data
2023Apr 26no dataApr 20no data
2022May 11Sep 18Apr 18Nov 3
2021May 23Sep 23Apr 13Oct 12
2020May 8no dataMay 8no data
2018Apr 23Oct 3Apr 16Oct 6
2017May 18Oct 2Apr 12Oct 2
2016Apr 17no dataMar 18no data
2015May 8Nov 4Mar 21Nov 16
2014May 7Oct 30Mar 23Nov 11
2013May 23no dataMay 2no data
2012May 20Oct 3Apr 14Nov 2
2011May 25Oct 15May 17Oct 16
2010May 24Oct 5Apr 19Oct 17
2009no dataOct 4no dataOct 11
2008Jun 11Sep 23Jun 10Oct 11
2007May 21Sep 19May 21Oct 26
2006May 14Oct 23May 3Oct 30
2005Apr 20Oct 27Apr 14Nov 8
2004Apr 24Oct 23Mar 20Nov 4
2003May 19no dataApr 5no data
2002May 17Oct 1May 7Oct 12
2001May 7Oct 10Apr 15Oct 28
2000Jul 2Sep 23May 7Nov 10
1999May 30Sep 27May 10Sep 27
1998May 28Oct 11Apr 9Oct 16
1997May 7Oct 6May 2Oct 19
1996May 10Sep 23May 10Oct 17
1995May 19Oct 13Apr 17Oct 22
1994May 4Oct 11Mar 26Nov 2
1993May 9Sep 21Apr 15Nov 5
1992May 21Sep 7Apr 23Oct 15
1991May 10Oct 18Apr 12Oct 27
1990May 22Oct 7Mar 27Oct 8
1989May 27Oct 15Mar 30Oct 29
1988Jun 10Sep 18Apr 9Nov 14
1987May 21Oct 11Mar 29Nov 17
1986May 23Sep 12Apr 30Nov 10
1985May 22Oct 7May 12Oct 8
1984Jun 1Sep 23Apr 26Sep 26
1983May 16Sep 19Apr 14Sep 20
1982May 11Sep 29May 5Oct 18
1981May 13Oct 4Apr 14Oct 12
1980May 24Oct 9Apr 11Oct 22
1979May 30Oct 31Apr 7Nov 1

"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.