Harper 3ENE, TX: frost dates by year

Last spring and first fall frost at NOAA station USC00413954, 2010 to 2025, measured from daily minimum temperatures.

Elevation 2,110 ft, 30.309, -99.203. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 27	Nov 12
Earliest	Jan 27 (2017)	Oct 27 (2020)
Latest	May 4 (2011)	Dec 12 (2021)
Trend	39.0 days earlier per decade	22.1 days later per decade
Years with data	13	15

At 28°F (hard freeze) the median last spring date is Feb 27 and the median first fall date is Nov 13.

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	Feb 23	Dec 2	Feb 23	none
2024	Feb 19	Dec 11	Feb 19	none
2023	Feb 19	no data	Feb 18	no data
2022	Mar 14	Nov 12	Mar 14	Nov 15
2021	Feb 20	Dec 12	Feb 20	none
2020	Feb 27	Oct 27	Feb 27	Dec 1
2019	Mar 7	Oct 31	Mar 7	Oct 31
2018	Feb 23	Nov 13	Feb 13	Nov 13
2017	Jan 27	Dec 6	Jan 9	Dec 8
2016	no data	Nov 20	no data	Dec 9
2015	no data	Nov 18	no data	Nov 22
2014	Apr 15	Nov 12	Apr 15	Nov 12
2013	Apr 20	Nov 3	Mar 26	Nov 13
2012	Mar 5	Oct 28	Mar 4	Oct 29
2011	May 4	Oct 29	Apr 5	Oct 29
2010	no data	Oct 29	no data	Oct 29

"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.