Shelby County, Illinois · Frost dates
Shelby County frost dates.
First-frost, last-frost, and growing-season length for Shelby County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-28
- 20%
- 04-21
- 50%
- 04-10
- 80%
- 04-03
- 90%
- 03-30
First fall frost
- 10%
- 10-08
- 20%
- 10-14
- 50%
- 10-24
- 80%
- 11-01
- 90%
- 11-05
28°F — killing freeze
Last spring freeze
- 10%
- 04-14
- 20%
- 04-08
- 50%
- 03-31
- 80%
- 03-20
- 90%
- 03-15
First fall freeze
- 10%
- 10-20
- 20%
- 10-26
- 50%
- 11-03
- 80%
- 11-15
- 90%
- 11-21
Growing season length (days, 28°F threshold)
- Short year
- 189
- Median
- 217
- Long year
- 251
Source NOAA station
SHELBYVILLE DAM, IL US
2.1 mi · 30 yrs of record (1991–2020) · 650 ft elev.
Data from SHELBYVILLE DAM, IL US, 2.1 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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