Bronx, NY: frost dates by year

Last spring and first fall frost at NOAA station USC00300961, 2002 to 2012, measured from daily minimum temperatures.

Elevation 39 ft, 40.837, -73.849. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 31	Nov 27
Earliest	Mar 22 (2006)	Nov 9 (2003)
Latest	Apr 8 (2007)	Dec 11 (2011)
Trend	11.3 days earlier per decade	24.6 days later per decade
Years with data	10	11

At 28°F (hard freeze) the median last spring date is Mar 22 and the median first fall date is Dec 4.

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
2012	Mar 27	Dec 6	Mar 6	none
2011	no data	Dec 11	no data	Dec 18
2010	Mar 27	Dec 5	Mar 27	Dec 9
2009	Mar 24	Dec 7	Mar 24	Dec 10
2008	Apr 3	Nov 18	Mar 30	Nov 19
2007	Apr 8	Nov 11	Mar 21	Nov 24
2006	Mar 22	Dec 4	Mar 21	Dec 7
2005	Mar 24	Nov 19	Mar 15	Nov 23
2004	Apr 6	Nov 9	Mar 23	Dec 14
2003	Apr 8	Nov 9	Mar 14	Dec 2
2002	Apr 7	Nov 27	Mar 23	Nov 27

"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.