Frost history / Indianapolis Nwfo, IN
Indianapolis Nwfo, IN: frost dates by year
Last spring and first fall frost at NOAA station USC00124260, 2012 to 2025, measured from daily minimum temperatures.
Elevation 790 ft, 39.707, -86.281. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 18 | Oct 29 |
| Earliest | Mar 23 (2017) | Oct 8 (2012) |
| Latest | May 9 (2020) | Nov 21 (2024) |
| Trend | 1.3 days later per decade | 10.2 days later per decade |
| Years with data | 14 | 13 |
At 28°F (hard freeze) the median last spring date is Apr 6 and the median first fall date is Nov 5.
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 12 | Oct 24 | Apr 8 | Nov 9 |
| 2024 | Apr 6 | Nov 21 | Mar 28 | Nov 21 |
| 2023 | Apr 24 | Oct 30 | Apr 24 | Oct 31 |
| 2022 | Apr 19 | Oct 19 | Apr 2 | Oct 20 |
| 2021 | Apr 22 | Nov 2 | Apr 21 | Nov 3 |
| 2020 | May 9 | Oct 16 | Apr 16 | Nov 2 |
| 2019 | Apr 2 | Oct 31 | Apr 1 | Oct 31 |
| 2018 | Apr 29 | Oct 21 | Apr 8 | Nov 9 |
| 2017 | Mar 23 | Oct 29 | Mar 23 | Nov 10 |
| 2016 | Apr 10 | Nov 12 | Apr 9 | Nov 13 |
| 2015 | Apr 24 | Oct 18 | Mar 29 | Nov 14 |
| 2014 | Apr 16 | Oct 31 | Apr 16 | Nov 1 |
| 2013 | Apr 21 | no data | Apr 3 | no data |
| 2012 | Apr 11 | Oct 8 | Mar 10 | Nov 5 |
"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.