Last Frost Day

Frost history / Prichard 3 Ese, ID

Prichard 3 Ese, ID: frost dates by year

Last spring and first fall frost at NOAA station USC00107357, 2011 to 2025, measured from daily minimum temperatures.

Elevation 2,547 ft, 47.643, -115.917. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianJun 1Sep 13
EarliestApr 30 (2023)Aug 25 (2012)
LatestJun 16 (2016)Oct 19 (2023)
Trend9.9 days earlier per decade16.9 days later per decade
Years with data1415

At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Sep 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 2920202012: May 252013: Jun 152014: Jun 82015: May 112016: Jun 162017: Jun 112018: Jun 132019: May 202020: May 112021: Jun 112022: May 242023: Apr 302024: May 312025: Jun 3

First fall frost (32°F)

Aug 13Aug 28Sep 12Sep 27Oct 12Oct 2720202011: Sep 32012: Aug 252013: Sep 272014: Sep 112015: Sep 42016: Sep 132017: Sep 162018: Sep 132019: Sep 292020: Sep 82021: Sep 172022: Sep 92023: Oct 192024: Sep 212025: Sep 27

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
2025Jun 3Sep 27May 7Oct 7
2024May 31Sep 21May 1Sep 30
2023Apr 30Oct 19Apr 23Oct 26
2022May 24Sep 9May 14Oct 17
2021Jun 11Sep 17May 19Oct 8
2020May 11Sep 8Apr 22Sep 8
2019May 20Sep 29May 2Sep 30
2018Jun 13Sep 13Apr 26Sep 14
2017Jun 11Sep 16Apr 17Sep 16
2016Jun 16Sep 13Apr 19Sep 13
2015May 11Sep 4May 10Sep 27
2014Jun 8Sep 11May 13Sep 11
2013Jun 15Sep 27May 3Oct 4
2012May 25Aug 25May 13Sep 11
2011no dataSep 3no dataSep 29

"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.