Milford, NH: frost dates by year

Last spring and first fall frost at NOAA station USC00275412, 1992 to 2007, measured from daily minimum temperatures.

Elevation 320 ft, 42.839, -71.649. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 10	Oct 6
Earliest	Apr 30 (1993)	Sep 20 (1993)
Latest	May 28 (1994)	Oct 21 (2005)
Trend	1.2 days earlier per decade	12.8 days later per decade
Years with data	14	15

At 28°F (hard freeze) the median last spring date is Apr 25 and the median first fall date is Oct 14.

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
2007	May 7	Oct 17	Apr 12	Oct 29
2006	no data	Oct 8	no data	Oct 14
2005	May 13	Oct 21	Apr 17	Nov 9
2004	May 6	Oct 6	Apr 8	Oct 28
2003	May 4	Oct 4	Apr 25	Oct 20
2002	May 20	Oct 9	Apr 25	Oct 15
2001	May 8	Oct 9	May 7	Oct 9
2000	May 20	no data	May 3	no data
1999	May 14	Oct 6	May 1	Oct 7
1998	May 14	Sep 24	Apr 26	Oct 4
1997	May 5	Sep 22	Apr 16	Oct 18
1996	May 15	Oct 4	Apr 28	Oct 4
1995	May 2	Sep 29	Apr 17	Oct 31
1994	May 28	Oct 12	Apr 23	Oct 12
1993	Apr 30	Sep 20	Apr 30	Oct 11
1992	no data	Sep 24	no data	Oct 1

"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.