Guthrie County, Iowa · Frost dates
Guthrie County frost dates.
First-frost, last-frost, and growing-season length for Guthrie County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-17
- 20%
- 05-11
- 50%
- 05-02
- 80%
- 04-22
- 90%
- 04-18
First fall frost
- 10%
- 09-20
- 20%
- 09-25
- 50%
- 10-03
- 80%
- 10-13
- 90%
- 10-18
28°F — killing freeze
Last spring freeze
- 10%
- 05-08
- 20%
- 05-03
- 50%
- 04-23
- 80%
- 04-13
- 90%
- 04-08
First fall freeze
- 10%
- 09-30
- 20%
- 10-04
- 50%
- 10-15
- 80%
- 10-23
- 90%
- 10-28
Growing season length (days, 28°F threshold)
- Short year
- 145
- Median
- 175
- Long year
- 203
Source NOAA station
GUTHRIE CTR, IA US
1.1 mi · 30 yrs of record (1991–2020) · 1065 ft elev.
Data from GUTHRIE CTR, IA US, 1.1 miles away with 30-year NOAA record (1991-2020).
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