Frost history / Arnold 4 Wnw, NE
Arnold 4 Wnw, NE: frost dates by year
Last spring and first fall frost at NOAA station USC00250355, 1986 to 2025, measured from daily minimum temperatures.
Elevation 2,877 ft, 41.432, -100.272. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 8 | Oct 2 |
| Earliest | Apr 14 (2007) | Sep 12 (1987) |
| Latest | May 29 (1992) | Nov 5 (2024) |
| Trend | 0.9 days earlier per decade | 7.3 days later per decade |
| Years with data | 22 | 22 |
At 28°F (hard freeze) the median last spring date is Apr 29 and the median first fall date is Oct 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 21 | no data | Apr 21 | no data |
| 2024 | Apr 22 | Nov 5 | Apr 22 | Nov 15 |
| 2023 | no data | Oct 16 | no data | Oct 27 |
| 2022 | no data | Oct 17 | no data | Oct 17 |
| 2018 | no data | Oct 5 | no data | Oct 11 |
| 2016 | May 15 | no data | May 3 | no data |
| 2015 | May 13 | Oct 17 | Apr 23 | Oct 17 |
| 2014 | May 18 | no data | May 16 | no data |
| 2013 | May 7 | no data | May 7 | no data |
| 2010 | May 15 | no data | May 15 | no data |
| 2007 | Apr 14 | no data | Apr 12 | no data |
| 2006 | May 12 | no data | Apr 27 | no data |
| 2005 | no data | Sep 29 | no data | Oct 7 |
| 2004 | no data | Oct 14 | no data | Oct 14 |
| 2002 | May 9 | Sep 27 | May 9 | Oct 13 |
| 2001 | no data | Sep 24 | no data | Oct 10 |
| 1998 | May 8 | Oct 12 | Apr 30 | Oct 12 |
| 1997 | May 15 | Oct 12 | May 12 | Oct 24 |
| 1996 | May 2 | Sep 27 | Apr 22 | Oct 10 |
| 1995 | May 12 | Sep 22 | Apr 27 | Sep 22 |
| 1994 | May 1 | Oct 9 | Apr 30 | Oct 9 |
| 1993 | May 3 | Sep 27 | Apr 20 | Oct 9 |
| 1992 | May 29 | Sep 28 | Apr 28 | Sep 28 |
| 1991 | May 6 | Sep 18 | May 6 | Sep 19 |
| 1990 | May 10 | Sep 23 | May 1 | Sep 23 |
| 1989 | May 6 | Sep 13 | May 6 | Sep 23 |
| 1988 | Apr 28 | Oct 5 | Apr 27 | Oct 5 |
| 1987 | Apr 22 | Sep 12 | Apr 22 | Oct 7 |
| 1986 | no data | Oct 11 | no data | Oct 13 |
"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.