Frost history / Upper Spavinaw Port, OK
Upper Spavinaw Port, OK: frost dates by year
Last spring and first fall frost at NOAA station USC00349101, 2009 to 2025, measured from daily minimum temperatures.
Elevation 795 ft, 36.348, -94.824. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 16 | Oct 30 |
| Earliest | Mar 29 (2024) | Oct 7 (2012) |
| Latest | Apr 26 (2013) | Nov 18 (2009) |
| Trend | 2.1 days earlier per decade | 6.9 days earlier per decade |
| Years with data | 14 | 15 |
At 28°F (hard freeze) the median last spring date is Mar 29 and the median first fall date is Nov 10.
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 | Apr 10 | Nov 2 | Mar 12 | Nov 10 |
| 2024 | Mar 29 | Oct 16 | Mar 29 | Nov 26 |
| 2023 | Apr 25 | Oct 30 | Mar 20 | Oct 31 |
| 2022 | Apr 20 | Oct 18 | Apr 1 | Oct 19 |
| 2021 | Apr 22 | Nov 6 | Apr 21 | Nov 19 |
| 2020 | Apr 19 | Oct 30 | Mar 7 | Nov 30 |
| 2019 | Apr 5 | Oct 12 | Apr 2 | Nov 1 |
| 2018 | Apr 22 | Nov 10 | Apr 8 | Nov 10 |
| 2017 | Apr 8 | Oct 25 | Mar 16 | Oct 29 |
| 2016 | Apr 6 | Nov 13 | Mar 30 | Nov 20 |
| 2015 | Apr 5 | Nov 8 | Mar 7 | Nov 9 |
| 2014 | Apr 25 | Nov 11 | Apr 16 | Nov 12 |
| 2013 | Apr 26 | Oct 25 | Apr 25 | Nov 13 |
| 2012 | no data | Oct 7 | no data | Oct 28 |
| 2009 | Apr 12 | Nov 18 | Mar 3 | Nov 28 |
"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.