Frost history / Smithville, OK
Smithville, OK: frost dates by year
Last spring and first fall frost at NOAA station USC00348285, 1961 to 2006, measured from daily minimum temperatures.
Elevation 822 ft, 34.468, -94.643. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 10 | Oct 16 |
| Earliest | Mar 18 (1967) | Sep 24 (1989) |
| Latest | May 7 (1989) | Nov 4 (1971) |
| Trend | 4.2 days later per decade | 2.1 days earlier per decade |
| Years with data | 35 | 31 |
At 28°F (hard freeze) the median last spring date is Mar 31 and the median first fall date is Nov 3.
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 |
|---|---|---|---|---|
| 2006 | Apr 9 | no data | Mar 25 | no data |
| 2005 | Apr 25 | no data | Mar 18 | no data |
| 2004 | Apr 15 | Oct 15 | Apr 14 | Nov 25 |
| 2003 | Apr 11 | Oct 27 | Apr 11 | Oct 27 |
| 2002 | no data | Oct 15 | no data | Nov 7 |
| 2001 | Apr 18 | no data | Mar 25 | no data |
| 2000 | no data | Oct 10 | no data | Oct 10 |
| 1997 | Apr 16 | no data | Apr 15 | no data |
| 1996 | Apr 30 | no data | Apr 7 | no data |
| 1995 | Apr 24 | no data | Mar 11 | no data |
| 1994 | Apr 9 | Oct 26 | Apr 1 | Oct 26 |
| 1993 | Apr 16 | Oct 22 | Mar 14 | Oct 28 |
| 1992 | Apr 4 | no data | Apr 3 | no data |
| 1991 | Mar 31 | Oct 16 | Mar 31 | Nov 2 |
| 1989 | May 7 | Sep 24 | Apr 12 | Oct 19 |
| 1988 | no data | Oct 12 | no data | Nov 13 |
| 1987 | Apr 6 | no data | Apr 6 | no data |
| 1985 | Apr 8 | no data | Mar 18 | no data |
| 1984 | Apr 18 | Oct 1 | Mar 9 | Nov 12 |
| 1983 | Apr 25 | Oct 13 | Apr 16 | Nov 13 |
| 1982 | Apr 11 | Oct 23 | Mar 26 | Oct 23 |
| 1981 | Apr 6 | Oct 24 | Mar 24 | Oct 24 |
| 1980 | Apr 15 | Oct 25 | Apr 15 | Oct 25 |
| 1979 | Apr 28 | Oct 5 | Apr 5 | Nov 3 |
| 1978 | no data | Oct 7 | no data | Nov 8 |
| 1977 | Mar 23 | Oct 12 | Mar 23 | Oct 12 |
| 1976 | Apr 2 | Oct 9 | Mar 17 | Oct 21 |
| 1975 | Apr 12 | Oct 3 | Apr 4 | Oct 19 |
| 1974 | Apr 17 | Oct 16 | Apr 9 | Nov 13 |
| 1973 | Apr 11 | Oct 29 | Apr 11 | Nov 10 |
| 1972 | Apr 9 | no data | Mar 31 | no data |
| 1971 | no data | Nov 4 | no data | Nov 7 |
| 1970 | Apr 6 | Oct 10 | Apr 3 | Nov 6 |
| 1969 | Mar 28 | Nov 1 | Mar 14 | Nov 5 |
| 1968 | Apr 5 | Oct 25 | Mar 24 | Nov 9 |
| 1967 | Mar 18 | Sep 28 | Mar 9 | Nov 4 |
| 1966 | no data | Oct 16 | no data | Oct 20 |
| 1965 | Mar 29 | Oct 25 | Mar 27 | Oct 25 |
| 1964 | Apr 10 | no data | Apr 9 | no data |
| 1963 | Mar 27 | Nov 2 | Mar 22 | Nov 2 |
| 1962 | Apr 3 | Nov 4 | Apr 3 | Nov 4 |
| 1961 | no data | Oct 26 | no data | Nov 4 |
"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.