Millheim, PA: frost dates by year

Last spring and first fall frost at NOAA station USC00365790, 2005 to 2025, measured from daily minimum temperatures.

Elevation 1,120 ft, 40.885, -77.475. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 10	Oct 7
Earliest	Apr 18 (2025)	Sep 16 (2007)
Latest	May 27 (2013)	Nov 3 (2021)
Trend	11.7 days earlier per decade	4.4 days later per decade
Years with data	18	20

At 28°F (hard freeze) the median last spring date is Apr 30 and the median first fall date is Oct 21.

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
2025	Apr 18	Oct 9	Apr 18	Oct 10
2024	Apr 27	Oct 11	Apr 23	Oct 25
2023	no data	Oct 24	no data	Nov 1
2022	May 10	no data	Apr 30	no data
2021	no data	Nov 3	no data	Nov 3
2020	May 21	Sep 20	May 14	Nov 4
2019	Apr 29	Oct 5	Apr 29	Oct 13
2018	Apr 23	Oct 17	Apr 23	Oct 19
2017	May 9	Oct 1	May 9	Oct 17
2016	May 16	Oct 11	Apr 24	Oct 11
2015	Apr 25	Oct 11	Apr 2	Oct 19
2014	May 19	Oct 5	Apr 28	Nov 8
2013	May 27	Sep 17	May 14	Oct 26
2012	Apr 30	Sep 25	Apr 30	Oct 13
2011	May 6	Oct 6	Apr 7	Oct 23
2010	May 11	Oct 13	May 11	Oct 23
2009	May 19	Oct 2	May 19	Oct 14
2008	May 20	Oct 4	Apr 17	Oct 7
2007	no data	Sep 16	no data	Oct 29
2006	May 24	Oct 13	Apr 30	Oct 13
2005	May 18	Oct 26	May 13	Oct 31

"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.