Porter County, Indiana · Frost dates
Porter County frost dates.
First-frost, last-frost, and growing-season length for Porter County, Indiana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-22
- 80%
- 04-12
- 90%
- 04-07
First fall frost
- 10%
- 10-12
- 20%
- 10-17
- 50%
- 10-25
- 80%
- 11-01
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-24
- 20%
- 04-19
- 50%
- 04-09
- 80%
- 03-31
- 90%
- 03-25
First fall freeze
- 10%
- 10-24
- 20%
- 10-29
- 50%
- 11-05
- 80%
- 11-15
- 90%
- 11-21
Growing season length (days, 28°F threshold)
- Short year
- 183
- Median
- 210
- Long year
- 241
Source NOAA station
VALPARAISO WTR WKS, IN US
1.7 mi · 30 yrs of record (1991–2020) · 800 ft elev.
Data from VALPARAISO WTR WKS, IN US, 1.7 miles away with 30-year NOAA record (1991-2020).
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