Lowden, IA: frost dates by year

Last spring and first fall frost at NOAA station USC00134963, 2007 to 2025, measured from daily minimum temperatures.

Elevation 738 ft, 41.861, -90.922. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 4	Oct 7
Earliest	Apr 13 (2016)	Sep 13 (2014)
Latest	May 17 (2014)	Oct 28 (2017)
Trend	10.7 days earlier per decade	11.6 days later per decade
Years with data	18	19

At 28°F (hard freeze) the median last spring date is Apr 20 and the median first fall date is Oct 16.

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 16	Oct 22	Apr 16	Oct 23
2024	Apr 21	Oct 7	Apr 21	Oct 16
2023	May 4	Oct 10	Apr 26	Oct 11
2022	Apr 27	Sep 28	Apr 19	Oct 8
2021	May 12	Oct 23	Apr 25	Oct 23
2020	May 12	Oct 4	May 9	Oct 16
2019	Apr 28	Oct 12	Apr 28	Oct 14
2018	Apr 29	Oct 11	Apr 29	Oct 17
2017	May 3	Oct 28	Apr 7	Oct 28
2016	Apr 13	Oct 13	Apr 12	Nov 11
2015	May 1	Oct 16	Apr 24	Oct 17
2014	May 17	Sep 13	Apr 18	Oct 11
2013	May 13	Oct 13	Apr 20	Oct 21
2012	Apr 23	Sep 23	Apr 12	Sep 24
2011	May 17	Sep 15	May 4	Oct 2
2010	May 9	Oct 3	Apr 18	Oct 4
2009	May 17	Oct 5	Apr 15	Oct 10
2008	May 12	Oct 4	Apr 29	Oct 21
2007	no data	Sep 15	no data	Oct 25

"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 1991–2020 frost probabilities.