Frost history / Rock Island Sp, TN
Rock Island Sp, TN: frost dates by year
Last spring and first fall frost at NOAA station USC00407808, 2007 to 2025, measured from daily minimum temperatures.
Elevation 880 ft, 35.809, -85.642. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 6 | Nov 2 |
| Earliest | Mar 19 (2017) | Oct 18 (2022) |
| Latest | Apr 23 (2021) | Nov 30 (2024) |
| Trend | 0.6 days later per decade | 6.7 days later per decade |
| Years with data | 14 | 13 |
At 28°F (hard freeze) the median last spring date is Mar 18 and the median first fall date is Nov 11.
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 9 | no data | Mar 3 | no data |
| 2024 | Mar 21 | Nov 30 | Mar 21 | Nov 30 |
| 2023 | no data | Nov 1 | no data | Nov 1 |
| 2022 | Mar 27 | Oct 18 | Mar 14 | Nov 14 |
| 2021 | Apr 23 | Nov 5 | Mar 7 | Nov 19 |
| 2020 | Apr 15 | Nov 2 | Feb 21 | Dec 1 |
| 2019 | Apr 1 | Nov 2 | Mar 19 | Nov 9 |
| 2018 | Apr 19 | Nov 10 | Mar 22 | Nov 11 |
| 2017 | Mar 19 | Oct 30 | Mar 17 | Nov 20 |
| 2016 | no data | Nov 20 | no data | Nov 20 |
| 2015 | Apr 5 | no data | Mar 31 | no data |
| 2014 | Apr 16 | Nov 2 | Mar 27 | Nov 2 |
| 2013 | no data | Oct 25 | no data | Oct 25 |
| 2011 | Mar 25 | no data | Feb 14 | no data |
| 2010 | no data | Oct 30 | no data | Nov 6 |
| 2009 | Apr 8 | no data | Mar 4 | no data |
| 2008 | Mar 26 | Oct 29 | Mar 25 | Oct 29 |
| 2007 | Apr 11 | no data | Apr 9 | 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 to 2020 frost probabilities.