Frost history / Elliston, MT
Elliston, MT: frost dates by year
Last spring and first fall frost at NOAA station USC00242738, 1951 to 2018, measured from daily minimum temperatures.
Elevation 5,080 ft, 46.563, -112.434. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 26 | Aug 30 |
| Earliest | May 20 (1961) | Aug 10 (1974) |
| Latest | Jul 31 (1968) | Sep 16 (2017) |
| Trend | 2.8 days earlier per decade | 1.6 days later per decade |
| Years with data | 34 | 34 |
At 28°F (hard freeze) the median last spring date is May 26 and the median first fall date is Sep 9.
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)
First fall frost (32°F)
Dots are single years. The gray line is the median, the green line the fitted trend.
Year by year
| Year | Last spring 32°F | First fall 32°F | Last spring 28°F | First fall 28°F |
|---|---|---|---|---|
| 2018 | Jul 4 | Sep 14 | Apr 26 | Sep 30 |
| 2017 | Jun 11 | Sep 16 | May 16 | Sep 17 |
| 2016 | Jun 17 | no data | May 11 | no data |
| 2015 | no data | Aug 23 | no data | Sep 28 |
| 2014 | no data | Sep 5 | no data | Sep 12 |
| 2013 | Jun 15 | no data | May 5 | no data |
| 2010 | Jun 15 | no data | May 21 | no data |
| 2009 | Jun 8 | Sep 8 | Jun 7 | Sep 21 |
| 2008 | Jun 11 | Aug 31 | May 12 | Sep 23 |
| 2007 | Jun 27 | Sep 8 | Jun 25 | Sep 9 |
| 2006 | May 30 | Aug 31 | May 30 | Aug 31 |
| 2004 | Jun 15 | no data | May 24 | no data |
| 1976 | no data | Aug 27 | no data | Sep 6 |
| 1975 | Jun 28 | Aug 26 | Jun 10 | Aug 29 |
| 1974 | Jul 12 | Aug 10 | Jun 1 | Sep 3 |
| 1973 | Jul 2 | Sep 2 | Jun 19 | Sep 15 |
| 1972 | Jul 2 | Aug 18 | May 25 | Aug 18 |
| 1971 | Jul 7 | Aug 24 | Jul 7 | Sep 14 |
| 1970 | Jun 13 | Sep 10 | May 13 | Sep 10 |
| 1969 | Jun 30 | Aug 30 | Jun 13 | Sep 4 |
| 1968 | Jul 31 | Aug 23 | Jun 14 | Sep 21 |
| 1967 | Jun 24 | Sep 14 | May 26 | Sep 14 |
| 1966 | Jun 23 | Aug 12 | Jun 13 | Aug 21 |
| 1965 | Jul 13 | Aug 29 | May 19 | Aug 29 |
| 1964 | Jun 20 | Aug 19 | May 27 | Sep 10 |
| 1963 | Jun 26 | Sep 15 | May 21 | Oct 17 |
| 1962 | Jun 7 | Aug 30 | Jun 5 | Sep 4 |
| 1961 | May 20 | Sep 2 | May 11 | Sep 13 |
| 1960 | Jun 26 | Aug 24 | May 24 | Aug 28 |
| 1959 | Jul 29 | Aug 14 | May 29 | Sep 9 |
| 1958 | Jul 15 | Sep 3 | May 1 | Sep 3 |
| 1957 | Jun 22 | Sep 1 | May 24 | Sep 9 |
| 1956 | Jul 1 | Aug 31 | May 13 | Aug 31 |
| 1955 | Jul 8 | Aug 27 | Jun 2 | Sep 19 |
| 1954 | Jun 19 | Aug 16 | Jun 18 | Sep 6 |
| 1953 | Jun 26 | Aug 25 | Jun 25 | Aug 25 |
| 1952 | Jul 22 | Sep 1 | Jun 13 | Sep 14 |
| 1951 | no data | Aug 31 | no data | Sep 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.