Lee County, Illinois · Frost dates
Lee County frost dates.
First-frost, last-frost, and growing-season length for Lee County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-14
- 20%
- 05-07
- 50%
- 04-27
- 80%
- 04-18
- 90%
- 04-12
First fall frost
- 10%
- 09-27
- 20%
- 10-01
- 50%
- 10-12
- 80%
- 10-21
- 90%
- 10-25
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-25
- 50%
- 04-16
- 80%
- 04-06
- 90%
- 04-02
First fall freeze
- 10%
- 10-05
- 20%
- 10-12
- 50%
- 10-24
- 80%
- 11-01
- 90%
- 11-07
Growing season length (days, 28°F threshold)
- Short year
- 158
- Median
- 191
- Long year
- 219
Source NOAA station
COMPTON 1 NW, IL US
10.7 mi · 30 yrs of record (1991–2020) · 905 ft elev.
Data from COMPTON 1 NW, IL US, 10.7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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