Randolph County, Illinois · Frost dates
Randolph County frost dates.
First-frost, last-frost, and growing-season length for Randolph County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-29
- 20%
- 04-23
- 50%
- 04-12
- 80%
- 04-02
- 90%
- 03-29
First fall frost
- 10%
- 10-07
- 20%
- 10-13
- 50%
- 10-22
- 80%
- 10-29
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 04-16
- 20%
- 04-10
- 50%
- 04-01
- 80%
- 03-22
- 90%
- 03-16
First fall freeze
- 10%
- 10-19
- 20%
- 10-23
- 50%
- 11-01
- 80%
- 11-09
- 90%
- 11-16
Growing season length (days, 28°F threshold)
- Short year
- 186
- Median
- 214
- Long year
- 245
Source NOAA station
SPARTA 1 W, IL US
7.0 mi · 30 yrs of record (1991–2020) · 535 ft elev.
Data from SPARTA 1 W, IL US, 7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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