Frost history / Edmunds Arrowwood Ref, ND
Edmunds Arrowwood Ref, ND: frost dates by year
Last spring and first fall frost at NOAA station USC00322536, 1974 to 2007, measured from daily minimum temperatures.
Elevation 1,460 ft, 47.265, -98.858. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Sep 22 |
| Earliest | Apr 20 (1998) | Aug 27 (1982) |
| Latest | Jun 6 (1985) | Oct 9 (1994) |
| Trend | 1.9 days earlier per decade | 4.9 days later per decade |
| Years with data | 18 | 18 |
At 28°F (hard freeze) the median last spring date is May 1 and the median first fall date is Oct 1.
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 |
|---|---|---|---|---|
| 2007 | no data | Sep 15 | no data | Oct 24 |
| 2006 | May 12 | no data | Apr 25 | no data |
| 2005 | May 15 | Oct 5 | May 4 | Oct 6 |
| 2004 | May 15 | Oct 1 | May 15 | Oct 4 |
| 2003 | May 20 | Sep 25 | Apr 30 | Sep 25 |
| 2002 | no data | Sep 24 | no data | Oct 13 |
| 2001 | no data | Sep 23 | no data | Sep 24 |
| 2000 | May 13 | Sep 23 | Apr 20 | Oct 4 |
| 1999 | May 9 | no data | Apr 17 | no data |
| 1998 | Apr 20 | no data | Apr 16 | no data |
| 1997 | no data | Sep 20 | no data | Oct 20 |
| 1996 | May 10 | Sep 29 | May 10 | Oct 3 |
| 1995 | Apr 29 | Sep 21 | Apr 22 | Sep 22 |
| 1994 | May 5 | Oct 9 | May 5 | Oct 24 |
| 1993 | no data | Sep 17 | no data | Oct 2 |
| 1985 | Jun 6 | no data | Apr 27 | no data |
| 1983 | no data | Sep 11 | no data | Sep 21 |
| 1982 | no data | Aug 27 | no data | Sep 30 |
| 1981 | May 10 | no data | May 10 | no data |
| 1980 | May 13 | no data | May 12 | no data |
| 1979 | May 20 | no data | May 12 | no data |
| 1978 | May 21 | no data | Apr 25 | no data |
| 1977 | May 7 | Oct 1 | May 2 | Oct 1 |
| 1976 | May 17 | Sep 21 | May 7 | Sep 23 |
| 1975 | May 12 | Sep 12 | Apr 20 | Oct 1 |
| 1974 | no data | Sep 1 | no data | Sep 22 |
"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.