Frost history / Lahontan Dam, NV
Lahontan Dam, NV: frost dates by year
Last spring and first fall frost at NOAA station USC00264349, 1951 to 2025, measured from daily minimum temperatures.
Elevation 4,167 ft, 39.469, -119.064. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 28 | Oct 22 |
| Earliest | Mar 16 (1990) | Sep 17 (1965) |
| Latest | Jul 5 (1978) | Nov 22 (1967) |
| Trend | 1.6 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 40 | 38 |
At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Nov 6.
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 |
|---|---|---|---|---|
| 2025 | no data | Oct 28 | no data | Dec 1 |
| 2022 | no data | Oct 23 | no data | Oct 24 |
| 2020 | Jun 8 | Oct 22 | Mar 26 | Oct 25 |
| 2019 | Apr 30 | Oct 1 | Mar 15 | Oct 9 |
| 2018 | Apr 16 | Oct 14 | Apr 2 | Nov 7 |
| 2017 | Apr 28 | Oct 8 | Apr 14 | Nov 6 |
| 2016 | Apr 16 | Nov 16 | Feb 23 | Nov 16 |
| 2015 | Apr 17 | no data | Apr 16 | no data |
| 2014 | Apr 4 | Oct 28 | Apr 3 | Nov 13 |
| 2013 | no data | Oct 5 | no data | Nov 22 |
| 1993 | Apr 20 | no data | Mar 1 | no data |
| 1991 | Apr 26 | Oct 24 | Apr 11 | Oct 28 |
| 1990 | Mar 16 | no data | Mar 13 | no data |
| 1989 | Apr 25 | no data | Apr 25 | no data |
| 1988 | May 6 | Nov 9 | Mar 31 | Nov 9 |
| 1987 | Apr 20 | Nov 15 | Mar 29 | Nov 15 |
| 1986 | May 6 | Nov 2 | Apr 3 | Nov 9 |
| 1985 | Apr 26 | Oct 9 | Mar 29 | Oct 9 |
| 1983 | May 16 | Nov 8 | Apr 13 | Nov 8 |
| 1982 | Apr 21 | no data | Apr 21 | no data |
| 1981 | no data | Sep 23 | no data | Oct 15 |
| 1980 | Apr 21 | no data | Apr 7 | no data |
| 1979 | no data | Oct 21 | no data | Oct 30 |
| 1978 | Jul 5 | no data | Apr 8 | no data |
| 1977 | no data | Oct 13 | no data | Nov 8 |
| 1976 | no data | Oct 27 | no data | Nov 26 |
| 1972 | Apr 30 | no data | Apr 19 | no data |
| 1971 | Apr 21 | Oct 1 | Apr 21 | Oct 28 |
| 1970 | Apr 29 | Oct 26 | Apr 27 | Oct 27 |
| 1969 | Apr 30 | no data | Mar 25 | no data |
| 1968 | May 6 | no data | Apr 22 | no data |
| 1967 | May 12 | Nov 22 | Apr 29 | Nov 22 |
| 1966 | Apr 27 | Oct 14 | Apr 19 | Nov 9 |
| 1965 | May 7 | Sep 17 | Apr 10 | Nov 22 |
| 1964 | May 7 | Oct 22 | May 6 | Oct 22 |
| 1963 | Apr 23 | Oct 31 | Apr 21 | Nov 1 |
| 1962 | Apr 30 | Oct 15 | Mar 24 | Nov 17 |
| 1961 | Apr 24 | Oct 22 | Apr 23 | Oct 23 |
| 1960 | May 22 | Oct 12 | May 22 | Nov 15 |
| 1959 | May 3 | Sep 29 | Mar 20 | Nov 5 |
| 1958 | Apr 24 | Sep 24 | Apr 24 | Oct 21 |
| 1957 | Apr 18 | Oct 6 | Apr 7 | Nov 6 |
| 1956 | Apr 11 | Oct 22 | Apr 3 | Oct 24 |
| 1955 | no data | Oct 27 | no data | Nov 2 |
| 1954 | May 2 | Oct 24 | May 1 | Oct 24 |
| 1953 | May 10 | Oct 21 | Apr 12 | Nov 18 |
| 1952 | Jun 12 | Nov 3 | Mar 23 | Nov 12 |
| 1951 | May 1 | Oct 27 | Mar 28 | Nov 2 |
"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 1991–2020 frost probabilities.