Frost history / Natick, MA
Natick, MA: frost dates by year
Last spring and first fall frost at NOAA station USC00195175, 2003 to 2014, measured from daily minimum temperatures.
Elevation 180 ft, 42.282, -71.344. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 30 | Oct 20 |
| Earliest | Apr 17 (2011) | Sep 25 (2012) |
| Latest | May 8 (2013) | Oct 29 (2007) |
| Trend | 7.5 days earlier per decade | 5.5 days later per decade |
| Years with data | 11 | 11 |
At 28°F (hard freeze) the median last spring date is Apr 10 and the median first fall date is Oct 27.
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 |
|---|---|---|---|---|
| 2014 | Apr 22 | no data | Apr 19 | no data |
| 2013 | May 8 | Oct 25 | Apr 8 | Oct 26 |
| 2012 | Apr 30 | Sep 25 | Apr 6 | Oct 13 |
| 2011 | Apr 17 | Oct 28 | Apr 10 | Oct 31 |
| 2010 | Apr 28 | Oct 23 | Mar 29 | Nov 3 |
| 2009 | Apr 22 | Oct 12 | Apr 2 | Oct 15 |
| 2008 | May 2 | Oct 20 | May 1 | Oct 25 |
| 2007 | May 6 | Oct 29 | Apr 11 | Oct 29 |
| 2006 | Apr 29 | Oct 13 | Apr 10 | Oct 27 |
| 2005 | May 4 | Oct 27 | Apr 16 | Nov 11 |
| 2004 | May 4 | Oct 5 | Mar 24 | Nov 3 |
| 2003 | no data | Oct 6 | no data | Oct 20 |
"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.