Last Frost Day

Frost history / Kodachrome Basin Park, UT

Kodachrome Basin Park, UT: frost dates by year

Last spring and first fall frost at NOAA station USC00424755, 1979 to 2025, measured from daily minimum temperatures.

Elevation 5,805 ft, 37.514, -111.988. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianMay 27Sep 25
EarliestApr 21 (1992)Sep 10 (2020)
LatestJun 30 (2020)Oct 24 (2015)
Trend2.3 days later per decade0.7 days earlier per decade
Years with data4544

At 28°F (hard freeze) the median last spring date is May 14 and the median first fall date is Oct 12.

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 14198019902000201020201980: Jun 141981: Jun 161982: Jun 81983: May 181984: May 171985: Jun 261986: May 181987: May 291988: May 311989: May 141990: Jun 11991: May 201992: Apr 211993: May 101994: May 221995: Jun 181996: Apr 301997: May 31998: May 231999: May 182000: May 142001: May 62002: May 222003: May 122004: May 142006: May 302007: May 252008: Jun 132009: Jun 62010: Jun 212011: Jun 92012: May 302013: May 282014: Jun 42015: May 202016: May 292017: Jun 132018: May 182019: May 292020: Jun 302021: May 272022: Jun 202023: Jun 242024: May 232025: May 20

First fall frost (32°F)

Aug 28Sep 12Sep 27Oct 12Oct 27Nov 11198019902000201020201979: Oct 91981: Oct 91982: Oct 11983: Sep 211984: Sep 281985: Sep 121986: Sep 191987: Sep 301988: Sep 131989: Sep 131990: Oct 81991: Oct 211992: Oct 91993: Sep 141994: Oct 91995: Sep 221996: Sep 171997: Oct 91998: Oct 61999: Sep 292000: Sep 242001: Oct 112002: Oct 52003: Sep 192004: Oct 92006: Sep 172008: Sep 242009: Sep 222010: Sep 232011: Oct 72012: Oct 92013: Sep 242014: Oct 22015: Oct 242016: Sep 152017: Sep 252018: Sep 142019: Sep 182020: Sep 102021: Sep 222022: Oct 112023: Sep 242024: Sep 182025: Oct 5

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 20Oct 5May 20Oct 16
2024May 23Sep 18May 23Oct 22
2023Jun 24Sep 24Apr 29Oct 13
2022Jun 20Oct 11May 24Oct 15
2021May 27Sep 22May 23Oct 11
2020Jun 30Sep 10Jun 9Sep 11
2019May 29Sep 18May 20Oct 1
2018May 18Sep 14Apr 29Oct 13
2017Jun 13Sep 25May 17Sep 25
2016May 29Sep 15May 25Oct 4
2015May 20Oct 24Apr 24Oct 27
2014Jun 4Oct 2May 22Oct 13
2013May 28Sep 24May 4Sep 28
2012May 30Oct 9May 29Oct 19
2011Jun 9Oct 7Jun 4Oct 7
2010Jun 21Sep 23May 25Oct 26
2009Jun 6Sep 22Apr 30Sep 23
2008Jun 13Sep 24Jun 12Oct 8
2007May 25no dataMay 8no data
2006May 30Sep 17May 12Sep 17
2004May 14Oct 9May 1Oct 23
2003May 12Sep 19May 11Oct 14
2002May 22Oct 5May 22Oct 13
2001May 6Oct 11May 5Oct 11
2000May 14Sep 24May 13Sep 25
1999May 18Sep 29May 17Sep 29
1998May 23Oct 6May 15Oct 7
1997May 3Oct 9Apr 14Oct 14
1996Apr 30Sep 17Apr 30Sep 19
1995Jun 18Sep 22Apr 25Oct 6
1994May 22Oct 9May 21Oct 18
1993May 10Sep 14Apr 25Oct 20
1992Apr 21Oct 9Mar 25Nov 1
1991May 20Oct 21May 19Oct 26
1990Jun 1Oct 8May 9Oct 8
1989May 14Sep 13May 13Oct 4
1988May 31Sep 13May 31Sep 19
1987May 29Sep 30Apr 23Oct 21
1986May 18Sep 19May 10Oct 13
1985Jun 26Sep 12May 14Sep 30
1984May 17Sep 28May 9Oct 16
1983May 18Sep 21May 18Sep 21
1982Jun 8Oct 1Jun 7Oct 1
1981Jun 16Oct 9May 10Oct 13
1980Jun 14no dataJun 13no data
1979no dataOct 9no dataOct 15

"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.