Montgomery County, Illinois · Frost dates
Montgomery County frost dates.
First-frost, last-frost, and growing-season length for Montgomery County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-28
- 20%
- 04-23
- 50%
- 04-13
- 80%
- 04-04
- 90%
- 03-30
First fall frost
- 10%
- 10-10
- 20%
- 10-15
- 50%
- 10-24
- 80%
- 10-31
- 90%
- 11-04
28°F — killing freeze
Last spring freeze
- 10%
- 04-18
- 20%
- 04-12
- 50%
- 04-02
- 80%
- 03-23
- 90%
- 03-17
First fall freeze
- 10%
- 10-21
- 20%
- 10-26
- 50%
- 11-02
- 80%
- 11-12
- 90%
- 11-20
Growing season length (days, 28°F threshold)
- Short year
- 186
- Median
- 214
- Long year
- 248
Source NOAA station
HILLSBORO, IL US
4.7 mi · 30 yrs of record (1991–2020) · 630 ft elev.
Data from HILLSBORO, IL US, 4.7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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