Frost history / Waterloo, OH
Waterloo, OH: frost dates by year
Last spring and first fall frost at NOAA station USC00338810, 1996 to 2021, measured from daily minimum temperatures.
Elevation 625 ft, 38.701, -82.473. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 5 | Oct 17 |
| Earliest | Apr 13 (1998) | Oct 1 (2001) |
| Latest | May 23 (2006) | Oct 27 (2005) |
| Trend | 0.5 days earlier per decade | 3.6 days later per decade |
| Years with data | 25 | 23 |
At 28°F (hard freeze) the median last spring date is Apr 17 and the median first fall date is Oct 23.
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 |
|---|---|---|---|---|
| 2021 | May 14 | no data | Apr 24 | no data |
| 2020 | May 14 | Oct 17 | Apr 17 | Oct 17 |
| 2019 | Apr 17 | Oct 16 | Apr 3 | Nov 2 |
| 2018 | May 1 | Oct 18 | Apr 22 | Oct 22 |
| 2017 | May 10 | Oct 26 | Apr 9 | Nov 10 |
| 2016 | no data | Oct 25 | no data | Nov 10 |
| 2015 | Apr 29 | Oct 17 | Apr 25 | Oct 18 |
| 2014 | Apr 18 | no data | Apr 17 | no data |
| 2013 | Apr 26 | Oct 20 | Apr 21 | Oct 26 |
| 2012 | Apr 25 | no data | Apr 25 | no data |
| 2011 | May 6 | Oct 22 | Apr 6 | Oct 30 |
| 2010 | May 11 | Oct 16 | Apr 29 | Oct 22 |
| 2009 | May 20 | Oct 18 | Apr 13 | Oct 19 |
| 2008 | May 1 | Oct 19 | Apr 16 | Oct 19 |
| 2007 | May 8 | Oct 13 | May 8 | Oct 30 |
| 2006 | May 23 | Oct 13 | Apr 11 | Oct 15 |
| 2005 | May 5 | Oct 27 | Mar 23 | Oct 29 |
| 2004 | May 5 | Oct 6 | Apr 29 | Nov 9 |
| 2003 | Apr 27 | Oct 3 | Apr 14 | Oct 3 |
| 2002 | May 23 | Oct 15 | Apr 8 | Oct 23 |
| 2001 | Apr 30 | Oct 1 | Apr 20 | Oct 7 |
| 2000 | Apr 28 | Oct 8 | Apr 27 | Oct 8 |
| 1999 | Apr 26 | Oct 21 | Apr 14 | Oct 25 |
| 1998 | Apr 13 | Oct 23 | Apr 12 | Oct 23 |
| 1997 | May 12 | Oct 15 | Apr 16 | Oct 21 |
| 1996 | May 15 | Oct 12 | May 15 | Nov 2 |
"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.