Last Frost Day

Frost history / Barre Falls Dam, MA

Barre Falls Dam, MA: frost dates by year

Last spring and first fall frost at NOAA station USC00190408, 1959 to 2025, measured from daily minimum temperatures.

Elevation 825 ft, 42.428, -72.028. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianMay 16Sep 19
EarliestApr 22 (2025)Aug 22 (1982)
LatestJun 26 (1965)Oct 31 (2023)
Trend4.2 days earlier per decade4.6 days later per decade
Years with data4844

At 28°F (hard freeze) the median last spring date is May 4 and the median first fall date is Oct 5.

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 1419601970198019902000201020201960: May 31961: May 311962: May 291963: May 251964: Jun 61965: Jun 261966: May 161967: Jun 11968: May 281969: May 271970: May 301971: Jun 11972: Jun 121973: May 11974: May 211975: Jun 101976: Jun 131977: May 161978: May 81979: May 31980: Jun 121981: May 201982: May 51983: May 191984: May 191985: May 211986: Jun 31987: Jun 71988: May 91989: May 81990: May 311999: May 142007: May 142008: May 112011: May 62012: May 122013: May 152014: May 72015: May 142016: May 102017: May 92018: Apr 252020: May 152021: Apr 272022: May 22023: May 182024: Apr 282025: Apr 22

First fall frost (32°F)

Aug 13Aug 28Sep 12Sep 27Oct 12Oct 27Nov 1119601970198019902000201020201959: Sep 141960: Sep 171961: Sep 181962: Sep 71963: Sep 111964: Sep 161965: Aug 301966: Sep 161967: Sep 121968: Sep 291969: Sep 201971: Aug 251972: Oct 21973: Sep 211974: Sep 241975: Sep 151976: Aug 311977: Sep 121978: Sep 101979: Sep 201980: Sep 91981: Sep 301982: Aug 221983: Sep 251984: Sep 61985: Sep 121986: Aug 301987: Sep 251988: Sep 161989: Sep 252007: Oct 132011: Oct 62012: Sep 252013: Oct 212014: Sep 202015: Sep 272016: Sep 262018: Oct 172019: Sep 192020: Sep 192021: Oct 242022: Oct 92023: Oct 312024: 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
2025Apr 22no dataApr 21no data
2024Apr 28Oct 13Apr 26Oct 17
2023May 18Oct 31May 18Nov 2
2022May 2Oct 9Apr 29Oct 19
2021Apr 27Oct 24Apr 22Oct 29
2020May 15Sep 19May 14Sep 21
2019no dataSep 19no dataOct 5
2018Apr 25Oct 17Apr 23Oct 19
2017May 9no dataApr 4no data
2016May 10Sep 26May 10Oct 14
2015May 14Sep 27Apr 25Oct 18
2014May 7Sep 20Apr 25Oct 21
2013May 15Oct 21Apr 22Oct 24
2012May 12Sep 25Apr 30Oct 13
2011May 6Oct 6Apr 23Oct 28
2008May 11no dataMay 3no data
2007May 14Oct 13Apr 20Oct 29
1999May 14no dataMay 13no data
1990May 31no dataApr 21no data
1989May 8Sep 25Apr 26Sep 28
1988May 9Sep 16Apr 26Sep 29
1987Jun 7Sep 25May 14Oct 5
1986Jun 3Aug 30May 10Oct 7
1985May 21Sep 12May 11Sep 13
1984May 19Sep 6May 17Oct 6
1983May 19Sep 25May 18Oct 21
1982May 5Aug 22Apr 23Oct 11
1981May 20Sep 30May 19Sep 30
1980Jun 12Sep 9Apr 22Oct 10
1979May 3Sep 20Apr 22Sep 20
1978May 8Sep 10May 4Sep 27
1977May 16Sep 12May 15Oct 7
1976Jun 13Aug 31May 13Aug 31
1975Jun 10Sep 15Apr 30Sep 15
1974May 21Sep 24May 6Sep 24
1973May 1Sep 21Apr 15Sep 22
1972Jun 12Oct 2May 26Oct 2
1971Jun 1Aug 25May 15Sep 25
1970May 30no dataApr 20no data
1969May 27Sep 20May 27Oct 16
1968May 28Sep 29May 8Oct 6
1967Jun 1Sep 12May 14Oct 21
1966May 16Sep 16May 11Sep 27
1965Jun 26Aug 30Apr 25Aug 31
1964Jun 6Sep 16May 4Sep 16
1963May 25Sep 11May 24Sep 24
1962May 29Sep 7May 13Sep 21
1961May 31Sep 18May 31Oct 5
1960May 3Sep 17May 3Oct 2
1959no dataSep 14no dataSep 19

"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.