Last Frost Day

Frost history / Anvil Rch, AZ

Anvil Rch, AZ: frost dates by year

Last spring and first fall frost at NOAA station USC00020287, 1951 to 2025, measured from daily minimum temperatures.

Elevation 2,759 ft, 31.979, -111.384. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianMar 31Nov 7
EarliestFeb 24 (1994)Oct 13 (2021)
LatestMay 8 (1964)Dec 8 (2017)
Trend1.9 days earlier per decade0.5 days earlier per decade
Years with data4538

At 28°F (hard freeze) the median last spring date is Mar 12 and the median first fall date is Nov 20.

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)

Feb 14Mar 1Mar 16Mar 31Apr 15Apr 30May 1519601970198019902000201020201951: Mar 291952: Mar 241953: Apr 121954: Mar 131960: Apr 251962: Mar 251963: Apr 191964: May 81966: Apr 51967: May 11969: May 61970: Apr 301982: Mar 211984: Apr 41985: Apr 11986: Mar 211987: Mar 311989: Mar 211990: Mar 181992: Mar 101993: Mar 141994: Feb 241996: Mar 151997: Mar 51998: Apr 171999: Apr 102000: Apr 22002: Mar 252003: Apr 72004: Mar 22006: Mar 232010: Apr 22011: Apr 152012: Mar 212013: Apr 192014: Apr 32015: Mar 52016: Mar 312018: Mar 212020: Mar 282021: Mar 172022: Apr 142023: Apr 92024: Apr 182025: Mar 19

First fall frost (32°F)

Sep 27Oct 12Oct 27Nov 11Nov 26Dec 11Dec 2619601970198019902000201020201962: Nov 191963: Nov 231965: Nov 291966: Nov 21967: Oct 311968: Nov 71969: Oct 301981: Oct 311984: Nov 101985: Nov 141986: Nov 231987: Nov 161988: Nov 161990: Oct 211991: Oct 291994: Nov 51996: Oct 221997: Oct 251998: Oct 171999: Oct 182000: Nov 82001: Nov 242002: Nov 52006: Oct 272010: Nov 102011: Nov 82012: Nov 112013: Nov 62015: Nov 112016: Nov 282017: Dec 82019: Oct 312020: Oct 272021: Oct 132022: Oct 252023: Nov 102024: Nov 72025: Dec 4

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
2025Mar 19Dec 4Mar 9none
2024Apr 18Nov 7Apr 7Nov 7
2023Apr 9Nov 10Mar 27Nov 22
2022Apr 14Oct 25Mar 12Nov 4
2021Mar 17Oct 13Mar 17Oct 13
2020Mar 28Oct 27Mar 28Oct 27
2019no dataOct 31no dataOct 31
2018Mar 21no dataMar 1no data
2017no dataDec 8no dataDec 8
2016Mar 31Nov 28Feb 6Nov 30
2015Mar 5Nov 11Feb 19Nov 11
2014Apr 3no dataFeb 15no data
2013Apr 19Nov 6Mar 1Dec 6
2012Mar 21Nov 11Mar 21Nov 11
2011Apr 15Nov 8Apr 11Dec 4
2010Apr 2Nov 10Mar 21Nov 12
2006Mar 23Oct 27Mar 13Nov 29
2004Mar 2no dataFeb 14no data
2003Apr 7no dataFeb 27no data
2002Mar 25Nov 5Mar 17Dec 19
2001no dataNov 24no dataNov 27
2000Apr 2Nov 8Feb 27Nov 8
1999Apr 10Oct 18Apr 10Nov 23
1998Apr 17Oct 17Mar 9Nov 10
1997Mar 5Oct 25Mar 5Dec 10
1996Mar 15Oct 22Mar 7Oct 22
1994Feb 24Nov 5Feb 24Nov 20
1993Mar 14no dataFeb 2no data
1992Mar 10no dataJan 24no data
1991no dataOct 29no dataNov 24
1990Mar 18Oct 21Mar 16Nov 8
1989Mar 21no dataMar 5no data
1988no dataNov 16no dataNov 16
1987Mar 31Nov 16Feb 24Nov 16
1986Mar 21Nov 23Feb 11Dec 1
1985Apr 1Nov 14Mar 31Nov 14
1984Apr 4Nov 10Mar 6Nov 26
1982Mar 21no dataMar 6no data
1981no dataOct 31no dataOct 31
1970Apr 30no dataMar 19no data
1969May 6Oct 30May 6Nov 20
1968no dataNov 7no dataNov 9
1967May 1Oct 31Apr 12Dec 2
1966Apr 5Nov 2Mar 5Nov 26
1965no dataNov 29no dataDec 19
1964May 8no dataMar 26no data
1963Apr 19Nov 23Mar 19Dec 13
1962Mar 25Nov 19Mar 15Nov 19
1960Apr 25no dataMar 15no data
1954Mar 13no dataMar 13no data
1953Apr 12no dataMar 7no data
1952Mar 24no dataMar 24no data
1951Mar 29no dataMar 20no 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.