Jasper County, Iowa · Frost dates
Jasper County frost dates.
First-frost, last-frost, and growing-season length for Jasper County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-04
- 20%
- 05-01
- 50%
- 04-22
- 80%
- 04-13
- 90%
- 04-08
First fall frost
- 10%
- 10-01
- 20%
- 10-06
- 50%
- 10-17
- 80%
- 10-25
- 90%
- 10-28
28°F — killing freeze
Last spring freeze
- 10%
- 04-25
- 20%
- 04-20
- 50%
- 04-12
- 80%
- 04-03
- 90%
- 03-30
First fall freeze
- 10%
- 10-14
- 20%
- 10-18
- 50%
- 10-26
- 80%
- 11-02
- 90%
- 11-06
Growing season length (days, 28°F threshold)
- Short year
- 172
- Median
- 197
- Long year
- 221
Source NOAA station
NEWTON, IA US
2.2 mi · 30 yrs of record (1991–2020) · 960 ft elev.
Data from NEWTON, IA US, 2.2 miles away with 30-year NOAA record (1991-2020).
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