Oxon Hill, MD: frost dates by year

Last spring and first fall frost at NOAA station USC00186800, 2002 to 2021, measured from daily minimum temperatures.

Elevation 190 ft, 38.796, -76.995. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 30	Nov 10
Earliest	Mar 9 (2020)	Oct 24 (2003)
Latest	Apr 17 (2014)	Nov 28 (2010)
Trend	1.1 days later per decade	4.3 days later per decade
Years with data	19	18

At 28°F (hard freeze) the median last spring date is Mar 18 and the median first fall date is Nov 23.

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
2021	Apr 4	no data	Mar 9	no data
2020	Mar 9	Nov 19	Mar 2	Nov 19
2019	Apr 3	Nov 9	Mar 14	Nov 9
2018	Apr 9	Nov 11	Mar 18	Nov 23
2017	Mar 24	Nov 11	Mar 24	Nov 11
2016	Apr 11	Nov 13	Apr 7	Dec 9
2015	Mar 30	Nov 21	Mar 30	none
2014	Apr 17	Nov 8	Mar 28	Nov 18
2013	Apr 5	Oct 26	Apr 4	Nov 14
2012	Mar 11	Nov 6	Mar 7	Nov 26
2011	Mar 29	Oct 31	Mar 4	Dec 11
2010	Mar 28	Nov 28	Feb 21	Nov 29
2009	Mar 26	Nov 7	Mar 25	Dec 11
2008	Mar 13	Nov 18	Mar 2	Nov 19
2007	Apr 9	Nov 11	Mar 20	Nov 24
2006	Mar 23	no data	Mar 20	no data
2005	Mar 25	Nov 18	Mar 18	Nov 18
2004	Apr 6	Nov 10	Mar 23	Dec 4
2003	Apr 1	Oct 24	Mar 15	Nov 10
2002	no data	Nov 1	no data	Nov 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.