Clay County, Illinois · Frost dates
Clay County frost dates.
First-frost, last-frost, and growing-season length for Clay County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-23
- 20%
- 04-19
- 50%
- 04-09
- 80%
- 04-02
- 90%
- 03-29
First fall frost
- 10%
- 10-11
- 20%
- 10-16
- 50%
- 10-24
- 80%
- 11-01
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-14
- 20%
- 04-09
- 50%
- 03-31
- 80%
- 03-21
- 90%
- 03-14
First fall freeze
- 10%
- 10-22
- 20%
- 10-26
- 50%
- 11-03
- 80%
- 11-13
- 90%
- 11-19
Growing season length (days, 28°F threshold)
- Short year
- 191
- Median
- 217
- Long year
- 250
Source NOAA station
FLORA, IL US
4.8 mi · 30 yrs of record (1991–2020) · 481 ft elev.
Data from FLORA, IL US, 4.8 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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