Morgan County, Illinois · Frost dates
Morgan County frost dates.
First-frost, last-frost, and growing-season length for Morgan County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-05
- 20%
- 04-30
- 50%
- 04-19
- 80%
- 04-09
- 90%
- 04-05
First fall frost
- 10%
- 10-01
- 20%
- 10-07
- 50%
- 10-17
- 80%
- 10-26
- 90%
- 10-29
28°F — killing freeze
Last spring freeze
- 10%
- 04-23
- 20%
- 04-18
- 50%
- 04-07
- 80%
- 03-30
- 90%
- 03-24
First fall freeze
- 10%
- 10-13
- 20%
- 10-18
- 50%
- 10-27
- 80%
- 11-04
- 90%
- 11-10
Growing season length (days, 28°F threshold)
- Short year
- 173
- Median
- 203
- Long year
- 231
Source NOAA station
JACKSONVILLE 2E, IL US
1.2 mi · 30 yrs of record (1991–2020) · 610 ft elev.
Data from JACKSONVILLE 2E, IL US, 1.2 miles away with 30-year NOAA record (1991-2020).
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