Frost history / Littlefork 10 Sw, MN
Littlefork 10 Sw, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00214809, 1994 to 2009, measured from daily minimum temperatures.
Elevation 1,200 ft, 48.368, -93.721. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 31 | Sep 13 |
| Earliest | May 14 (1996) | Aug 20 (2004) |
| Latest | Jun 16 (1999) | Sep 24 (2001) |
| Trend | 3.7 days earlier per decade | 0.7 days earlier per decade |
| Years with data | 15 | 13 |
At 28°F (hard freeze) the median last spring date is May 12 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 |
|---|---|---|---|---|
| 2009 | Jun 6 | no data | May 15 | no data |
| 2008 | May 28 | Aug 26 | May 27 | Oct 3 |
| 2007 | May 20 | no data | Apr 25 | no data |
| 2006 | no data | Sep 9 | no data | Oct 9 |
| 2005 | May 16 | Sep 23 | May 16 | Oct 7 |
| 2004 | May 28 | Aug 20 | May 28 | Oct 4 |
| 2003 | May 31 | Sep 20 | May 31 | Oct 1 |
| 2002 | Jun 4 | Sep 23 | May 24 | Oct 3 |
| 2001 | May 23 | Sep 24 | Apr 27 | Sep 24 |
| 2000 | Jun 5 | Sep 15 | Apr 29 | Sep 24 |
| 1999 | Jun 16 | Sep 20 | May 9 | Sep 29 |
| 1998 | Jun 4 | no data | May 10 | no data |
| 1997 | May 27 | Sep 3 | May 21 | Sep 3 |
| 1996 | May 14 | Sep 13 | May 12 | Sep 14 |
| 1995 | Jun 9 | Sep 7 | May 6 | Sep 8 |
| 1994 | Jun 2 | Sep 1 | May 10 | Oct 1 |
"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.