Buchanan County, Iowa · Frost dates
Buchanan County frost dates.
First-frost, last-frost, and growing-season length for Buchanan County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-12
- 20%
- 05-08
- 50%
- 04-30
- 80%
- 04-21
- 90%
- 04-16
First fall frost
- 10%
- 09-23
- 20%
- 09-27
- 50%
- 10-07
- 80%
- 10-16
- 90%
- 10-21
28°F — killing freeze
Last spring freeze
- 10%
- 05-04
- 20%
- 04-30
- 50%
- 04-20
- 80%
- 04-09
- 90%
- 04-05
First fall freeze
- 10%
- 10-02
- 20%
- 10-08
- 50%
- 10-17
- 80%
- 10-26
- 90%
- 10-31
Growing season length (days, 28°F threshold)
- Short year
- 151
- Median
- 180
- Long year
- 209
Source NOAA station
INDEPENDENCE #1, IA US
4.4 mi · 30 yrs of record (1991–2020) · 1010 ft elev.
Data from INDEPENDENCE #1, IA US, 4.4 miles away with 30-year NOAA record (1991-2020).
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