Sangamon County, Illinois · Frost dates
Sangamon County frost dates.
First-frost, last-frost, and growing-season length for Sangamon County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-30
- 20%
- 04-24
- 50%
- 04-15
- 80%
- 04-07
- 90%
- 04-03
First fall frost
- 10%
- 10-09
- 20%
- 10-15
- 50%
- 10-22
- 80%
- 10-30
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 04-19
- 20%
- 04-14
- 50%
- 04-05
- 80%
- 03-28
- 90%
- 03-21
First fall freeze
- 10%
- 10-20
- 20%
- 10-25
- 50%
- 11-01
- 80%
- 11-10
- 90%
- 11-15
Growing season length (days, 28°F threshold)
- Short year
- 184
- Median
- 210
- Long year
- 239
Source NOAA station
SPRINGFIELD #2, IL US
2.9 mi · 30 yrs of record (1991–2020) · 599 ft elev.
Data from SPRINGFIELD #2, IL US, 2.9 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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