Free Union, VA: frost dates by year

Last spring and first fall frost at NOAA station USC00443213, 2011 to 2025, measured from daily minimum temperatures.

Elevation 590 ft, 38.091, -78.589. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 22	Oct 27
Earliest	Apr 4 (2019)	Oct 13 (2012)
Latest	May 10 (2020)	Nov 8 (2014)
Trend	1.2 days later per decade	3.6 days later per decade
Years with data	14	13

At 28°F (hard freeze) the median last spring date is Apr 6 and the median first fall date is Nov 5.

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 25	Apr 10	Nov 7
2024	Apr 23	no data	Mar 26	no data
2023	Apr 12	Nov 2	Apr 10	Nov 2
2022	Apr 30	Oct 21	Apr 5	Nov 14
2021	Apr 24	Nov 3	Apr 4	Nov 5
2020	May 10	Oct 31	Mar 9	Nov 18
2019	Apr 4	Nov 2	Apr 3	Nov 4
2018	Apr 22	Oct 22	Apr 20	Nov 11
2017	Apr 10	Oct 27	Mar 24	Nov 11
2016	Apr 17	no data	Apr 11	no data
2015	Apr 13	Oct 18	Apr 6	Oct 18
2014	Apr 21	Nov 8	Apr 18	Nov 8
2013	Apr 23	Oct 25	Apr 22	Oct 26
2012	Apr 25	Oct 13	Mar 12	Nov 5
2011	no data	Oct 29	no data	Oct 30

"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.