Frost history / Somerville Dam, TX
Somerville Dam, TX: frost dates by year
Last spring and first fall frost at NOAA station USC00418446, 1966 to 2019, measured from daily minimum temperatures.
Elevation 263 ft, 30.337, -96.540. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 8 | Nov 20 |
| Earliest | Feb 2 (1991) | Oct 20 (1989) |
| Latest | Apr 11 (1973) | Dec 15 (1998) |
| Trend | 2.6 days later per decade | 2.4 days earlier per decade |
| Years with data | 45 | 49, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 16 and the median first fall date is Nov 30.
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 |
|---|---|---|---|---|
| 2019 | Apr 2 | no data | Mar 7 | no data |
| 2018 | no data | Nov 13 | no data | Nov 13 |
| 2016 | Mar 22 | Nov 20 | Feb 8 | Nov 20 |
| 2015 | Mar 7 | Nov 22 | Mar 7 | none |
| 2014 | Mar 13 | Nov 14 | Mar 4 | Nov 14 |
| 2013 | Mar 27 | Nov 13 | Jan 7 | Nov 29 |
| 2011 | no data | Nov 4 | no data | Dec 7 |
| 2010 | Apr 9 | Oct 30 | Mar 3 | Oct 30 |
| 2009 | Apr 7 | Nov 18 | Mar 2 | Dec 3 |
| 2008 | Mar 8 | Oct 28 | Feb 27 | Oct 28 |
| 2007 | Mar 5 | Nov 27 | Mar 5 | Dec 4 |
| 2006 | Feb 19 | Nov 21 | Jan 14 | Dec 1 |
| 2005 | no data | Nov 17 | no data | Nov 17 |
| 2004 | Feb 15 | Dec 1 | Feb 7 | Dec 15 |
| 2003 | Apr 10 | Nov 24 | Mar 30 | Nov 24 |
| 2002 | no data | Nov 23 | no data | Nov 29 |
| 2001 | no data | Nov 21 | no data | Nov 29 |
| 2000 | Mar 12 | Nov 9 | Feb 5 | Nov 14 |
| 1999 | Mar 16 | no data | Mar 15 | no data |
| 1998 | no data | Dec 15 | no data | Dec 22 |
| 1997 | Feb 11 | Nov 17 | Jan 30 | Nov 17 |
| 1996 | Mar 21 | Nov 25 | Mar 21 | Dec 16 |
| 1995 | no data | Nov 12 | no data | Nov 29 |
| 1994 | Mar 10 | Dec 1 | Feb 15 | none |
| 1993 | Mar 14 | Oct 31 | Mar 14 | Oct 31 |
| 1992 | Feb 8 | Nov 5 | Jan 17 | Nov 29 |
| 1991 | Feb 2 | Nov 3 | Feb 1 | Nov 5 |
| 1990 | Feb 5 | Nov 30 | Jan 13 | Nov 30 |
| 1989 | Mar 9 | Oct 20 | Mar 8 | Dec 9 |
| 1988 | Mar 19 | Nov 23 | Feb 13 | Dec 18 |
| 1987 | Apr 3 | Nov 11 | Jan 11 | Dec 16 |
| 1986 | Mar 1 | Nov 13 | Feb 12 | none |
| 1985 | Feb 13 | Dec 2 | Feb 8 | Dec 2 |
| 1984 | Mar 1 | Nov 22 | Feb 28 | Dec 7 |
| 1983 | Feb 8 | Nov 29 | none | Dec 7 |
| 1982 | Mar 7 | Dec 12 | Feb 7 | Dec 12 |
| 1981 | Feb 15 | Dec 5 | Feb 13 | Dec 18 |
| 1980 | Mar 18 | Nov 19 | Mar 3 | Dec 11 |
| 1979 | Feb 20 | Nov 14 | Feb 17 | Nov 14 |
| 1978 | Mar 6 | Dec 8 | Mar 5 | Dec 8 |
| 1977 | Feb 7 | Dec 6 | Jan 30 | Dec 7 |
| 1976 | Mar 17 | Nov 16 | Jan 28 | Nov 28 |
| 1975 | Mar 15 | Nov 14 | Feb 8 | Nov 23 |
| 1974 | Feb 27 | Nov 30 | Feb 26 | Nov 30 |
| 1973 | Apr 11 | Dec 8 | Feb 11 | Dec 20 |
| 1972 | Feb 10 | Nov 30 | Feb 10 | Dec 6 |
| 1971 | Mar 8 | none | Mar 5 | none |
| 1970 | Mar 22 | Nov 16 | Feb 4 | Nov 16 |
| 1969 | Mar 11 | Nov 15 | Mar 9 | Nov 15 |
| 1968 | Mar 23 | Nov 12 | Mar 1 | Dec 8 |
| 1967 | Mar 8 | Dec 3 | Mar 7 | Dec 4 |
| 1966 | Mar 7 | no data | Mar 6 | no 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 1991–2020 frost probabilities.