Lake County, Illinois · Frost dates
Lake County frost dates.
First-frost, last-frost, and growing-season length for Lake County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-11
- 20%
- 05-06
- 50%
- 04-26
- 80%
- 04-16
- 90%
- 04-11
First fall frost
- 10%
- 10-05
- 20%
- 10-11
- 50%
- 10-21
- 80%
- 10-30
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-23
- 50%
- 04-13
- 80%
- 04-04
- 90%
- 03-31
First fall freeze
- 10%
- 10-17
- 20%
- 10-23
- 50%
- 11-01
- 80%
- 11-10
- 90%
- 11-14
Growing season length (days, 28°F threshold)
- Short year
- 172
- Median
- 202
- Long year
- 228
Source NOAA station
CHICAGO BOTANIC GARDEN, IL US
3.3 mi · 30 yrs of record (1991–2020) · 630 ft elev.
Data from CHICAGO BOTANIC GARDEN, IL US, 3.3 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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