Marshall County, Illinois · Frost dates
Marshall County frost dates.
First-frost, last-frost, and growing-season length for Marshall County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-07
- 20%
- 05-01
- 50%
- 04-20
- 80%
- 04-10
- 90%
- 04-05
First fall frost
- 10%
- 10-03
- 20%
- 10-09
- 50%
- 10-17
- 80%
- 10-26
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-24
- 20%
- 04-18
- 50%
- 04-07
- 80%
- 03-31
- 90%
- 03-22
First fall freeze
- 10%
- 10-15
- 20%
- 10-20
- 50%
- 10-28
- 80%
- 11-06
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 174
- Median
- 204
- Long year
- 235
Source NOAA station
LACON, IL US
3.9 mi · 30 yrs of record (1991–2020) · 458 ft elev.
Data from LACON, IL US, 3.9 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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