McDonough County, Illinois · Frost dates
McDonough County frost dates.
First-frost, last-frost, and growing-season length for McDonough County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-02
- 20%
- 04-28
- 50%
- 04-17
- 80%
- 04-08
- 90%
- 04-04
First fall frost
- 10%
- 10-07
- 20%
- 10-13
- 50%
- 10-22
- 80%
- 10-29
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-21
- 20%
- 04-17
- 50%
- 04-07
- 80%
- 03-30
- 90%
- 03-22
First fall freeze
- 10%
- 10-18
- 20%
- 10-23
- 50%
- 10-30
- 80%
- 11-08
- 90%
- 11-13
Growing season length (days, 28°F threshold)
- Short year
- 180
- Median
- 206
- Long year
- 236
Source NOAA station
PRAIRIE CITY 2S, IL US
14.7 mi · 30 yrs of record (1991–2020) · 650 ft elev.
Data from PRAIRIE CITY 2S, IL US, 14.7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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