Worth County, Iowa · Frost dates
Worth County frost dates.
First-frost, last-frost, and growing-season length for Worth County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-16
- 20%
- 05-12
- 50%
- 05-04
- 80%
- 04-25
- 90%
- 04-21
First fall frost
- 10%
- 09-20
- 20%
- 09-25
- 50%
- 10-04
- 80%
- 10-12
- 90%
- 10-17
28°F — killing freeze
Last spring freeze
- 10%
- 05-07
- 20%
- 05-02
- 50%
- 04-24
- 80%
- 04-14
- 90%
- 04-09
First fall freeze
- 10%
- 10-01
- 20%
- 10-05
- 50%
- 10-13
- 80%
- 10-21
- 90%
- 10-25
Growing season length (days, 28°F threshold)
- Short year
- 147
- Median
- 172
- Long year
- 199
Source NOAA station
NORTHWOOD, IA US
4.6 mi · 30 yrs of record (1991–2020) · 1190 ft elev.
Data from NORTHWOOD, IA US, 4.6 miles away with 30-year NOAA record (1991-2020).
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