Shawnee Sp, PA: frost dates by year

Last spring and first fall frost at NOAA station USC00368011, 1992 to 2010, measured from daily minimum temperatures.

Elevation 1,275 ft, 40.033, -78.637. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 10	Oct 7
Earliest	Apr 25 (2003)	Sep 24 (1992)
Latest	May 31 (2001)	Oct 29 (2007)
Trend	6.4 days earlier per decade	8.1 days later per decade
Years with data	18	18

At 28°F (hard freeze) the median last spring date is Apr 28 and the median first fall date is Oct 18.

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
2010	May 11	no data	May 10	no data
2009	May 18	Oct 12	May 18	Oct 19
2008	May 1	Oct 7	Apr 17	Oct 19
2007	May 7	Oct 29	Apr 14	Oct 29
2006	May 7	Oct 1	Apr 27	Oct 13
2005	May 9	Oct 26	May 5	Oct 31
2004	May 4	Oct 6	Apr 16	Oct 18
2003	Apr 25	Oct 3	Apr 2	Oct 3
2002	May 23	Oct 8	May 22	Oct 18
2001	May 31	Oct 7	Apr 29	Oct 8
2000	May 16	Oct 9	Apr 13	Oct 29
1999	Apr 29	Oct 7	Apr 25	Oct 27
1998	Apr 29	Oct 3	Apr 28	Nov 5
1997	May 23	Oct 2	May 8	Oct 17
1996	May 15	Oct 4	May 15	Oct 4
1995	May 8	Oct 17	May 1	Oct 18
1994	May 28	Oct 3	May 28	Oct 4
1993	May 21	Oct 1	Apr 28	Oct 1
1992	no data	Sep 24	no data	Oct 6

"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.