Monroe County, Illinois · Frost dates
Monroe County frost dates.
First-frost, last-frost, and growing-season length for Monroe County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-25
- 20%
- 04-20
- 50%
- 04-09
- 80%
- 03-31
- 90%
- 03-25
First fall frost
- 10%
- 10-14
- 20%
- 10-19
- 50%
- 10-26
- 80%
- 11-03
- 90%
- 11-08
28°F — killing freeze
Last spring freeze
- 10%
- 04-15
- 20%
- 04-09
- 50%
- 03-31
- 80%
- 03-19
- 90%
- 03-12
First fall freeze
- 10%
- 10-23
- 20%
- 10-28
- 50%
- 11-05
- 80%
- 11-16
- 90%
- 11-23
Growing season length (days, 28°F threshold)
- Short year
- 191
- Median
- 219
- Long year
- 256
Source NOAA station
FESTUS, MO US
12.3 mi · 30 yrs of record (1991–2020) · 600 ft elev.
Data from FESTUS, MO US, 12.3 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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