Frost history / Rolette 3SE, ND
Rolette 3SE, ND: frost dates by year
Last spring and first fall frost at NOAA station USC00327655, 1999 to 2024, measured from daily minimum temperatures.
Elevation 1,620 ft, 48.630, -99.807. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 19 | Sep 21 |
| Earliest | May 3 (2011) | Aug 20 (2004) |
| Latest | Jun 7 (2004) | Oct 7 (2023) |
| Trend | 1.5 days earlier per decade | 4.6 days later per decade |
| Years with data | 19 | 20 |
At 28°F (hard freeze) the median last spring date is May 14 and the median first fall date is Oct 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 |
|---|---|---|---|---|
| 2024 | May 25 | Oct 1 | Apr 29 | Oct 4 |
| 2023 | no data | Oct 7 | no data | Oct 7 |
| 2022 | Jun 3 | Sep 22 | May 3 | Sep 22 |
| 2021 | May 28 | Sep 21 | May 11 | Oct 16 |
| 2020 | May 16 | Sep 8 | May 12 | Sep 8 |
| 2019 | no data | Oct 1 | no data | Oct 11 |
| 2018 | May 11 | Sep 25 | May 10 | Sep 26 |
| 2017 | May 19 | Sep 29 | May 19 | Oct 5 |
| 2016 | May 17 | Sep 28 | May 14 | Oct 8 |
| 2015 | May 30 | Sep 11 | May 30 | Sep 29 |
| 2014 | May 17 | Sep 15 | May 15 | Sep 15 |
| 2013 | May 13 | Sep 21 | May 13 | Oct 6 |
| 2011 | May 3 | no data | May 3 | no data |
| 2010 | May 10 | Sep 18 | May 10 | Sep 18 |
| 2009 | Jun 5 | no data | May 23 | no data |
| 2008 | May 27 | Oct 1 | May 27 | Oct 10 |
| 2007 | May 27 | Sep 14 | May 27 | Oct 13 |
| 2006 | May 12 | Sep 8 | May 5 | Sep 20 |
| 2005 | May 15 | Oct 5 | May 15 | Oct 8 |
| 2004 | Jun 7 | Aug 20 | Jun 7 | Oct 1 |
| 2003 | no data | Sep 19 | no data | Sep 25 |
| 2000 | Jun 2 | no data | May 14 | no data |
| 1999 | no data | Sep 28 | no data | Sep 29 |
"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.