Attica 2E, IN: frost dates by year

Last spring and first fall frost at NOAA station USC00120331, 1991 to 2010, measured from daily minimum temperatures.

Elevation 727 ft, 40.284, -87.196. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 19	Oct 11
Earliest	Mar 28 (1999)	Sep 20 (1991)
Latest	May 17 (2009)	Oct 28 (2005)
Trend	6.0 days later per decade	4.9 days later per decade
Years with data	19	19

At 28°F (hard freeze) the median last spring date is Apr 7 and the median first fall date is Oct 22.

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
2010	Apr 29	Oct 6	Mar 28	Oct 22
2009	May 17	Oct 11	Apr 8	Oct 19
2008	Apr 30	Oct 22	Apr 15	Oct 28
2007	Apr 15	Oct 14	Apr 11	Nov 7
2006	Apr 10	no data	Apr 10	no data
2005	May 4	Oct 28	Mar 25	Nov 17
2004	Apr 14	Oct 5	Apr 5	Nov 13
2003	Apr 13	Oct 2	Apr 7	Oct 2
2002	Apr 23	Oct 14	Apr 7	Oct 14
2001	Apr 19	Oct 7	Apr 18	Oct 28
2000	Apr 13	Oct 7	Apr 12	Oct 9
1999	Mar 28	Sep 22	Mar 27	Oct 25
1998	Apr 5	Oct 23	Mar 25	Nov 5
1997	May 16	Oct 15	Apr 18	Oct 22
1996	Apr 27	Oct 11	Apr 14	Oct 20
1995	Apr 6	Sep 23	Apr 6	Sep 23
1994	Apr 8	Oct 25	Apr 8	Nov 22
1993	Apr 22	Sep 30	Apr 4	Nov 1
1992	Apr 29	Oct 17	Apr 5	Oct 19
1991	no data	Sep 20	no data	Oct 16

"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.