Lucas County, Iowa · Frost dates
Lucas County frost dates.
First-frost, last-frost, and growing-season length for Lucas County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-19
- 20%
- 05-14
- 50%
- 05-05
- 80%
- 04-26
- 90%
- 04-21
First fall frost
- 10%
- 09-20
- 20%
- 09-25
- 50%
- 10-05
- 80%
- 10-14
- 90%
- 10-18
28°F — killing freeze
Last spring freeze
- 10%
- 05-10
- 20%
- 05-05
- 50%
- 04-26
- 80%
- 04-16
- 90%
- 04-12
First fall freeze
- 10%
- 09-30
- 20%
- 10-06
- 50%
- 10-16
- 80%
- 10-24
- 90%
- 10-28
Growing season length (days, 28°F threshold)
- Short year
- 143
- Median
- 173
- Long year
- 199
Source NOAA station
CHARITON 1 E, IA US
3.0 mi · 30 yrs of record (1991–2020) · 965 ft elev.
Data from CHARITON 1 E, IA US, 3 miles away with 30-year NOAA record (1991-2020).
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