Avondale 2 N, PA: frost dates by year

Last spring and first fall frost at NOAA station USW00003761, 2006 to 2024, measured from daily minimum temperatures.

Elevation 400 ft, 39.859, -75.786. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 22	Oct 26
Earliest	Mar 30 (2011)	Oct 13 (2006)
Latest	May 14 (2013)	Nov 10 (2017)
Trend	2.2 days later per decade	2.5 days later per decade
Years with data	16	17

At 28°F (hard freeze) the median last spring date is Apr 4 and the median first fall date is Nov 6.

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
2024	Apr 26	Oct 28	Mar 24	Nov 10
2023	Apr 19	Nov 1	Apr 3	Nov 2
2022	no data	Oct 19	no data	Nov 15
2021	Apr 22	no data	Apr 3	no data
2020	May 10	Oct 31	Apr 19	Nov 18
2019	no data	Oct 19	no data	Nov 4
2018	Apr 21	no data	Apr 21	no data
2017	Apr 9	Nov 10	Mar 24	Nov 10
2016	Apr 15	Oct 25	Apr 10	Oct 26
2015	Apr 25	Oct 18	Apr 25	Oct 19
2014	Apr 21	Oct 20	Apr 16	Nov 8
2013	May 14	Oct 26	Apr 4	Oct 26
2012	Apr 30	Oct 13	Mar 11	Nov 6
2011	Mar 30	Oct 30	Mar 30	Oct 31
2010	May 11	Oct 31	Mar 27	Nov 2
2009	Apr 24	Nov 4	Apr 13	Nov 6
2008	Apr 16	Oct 19	Apr 3	Nov 11
2007	Apr 14	Oct 29	Apr 11	Nov 8
2006	no data	Oct 13	no data	Nov 4

"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.