Washington County, Illinois · Frost dates
Washington County frost dates.
First-frost, last-frost, and growing-season length for Washington County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-22
- 20%
- 04-18
- 50%
- 04-07
- 80%
- 03-30
- 90%
- 03-24
First fall frost
- 10%
- 10-14
- 20%
- 10-18
- 50%
- 10-26
- 80%
- 11-02
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-12
- 20%
- 04-07
- 50%
- 03-30
- 80%
- 03-19
- 90%
- 03-13
First fall freeze
- 10%
- 10-24
- 20%
- 10-29
- 50%
- 11-04
- 80%
- 11-14
- 90%
- 11-19
Growing season length (days, 28°F threshold)
- Short year
- 195
- Median
- 219
- Long year
- 251
Source NOAA station
NASHVILLE 1 E, IL US
3.2 mi · 30 yrs of record (1991–2020) · 513 ft elev.
Data from NASHVILLE 1 E, IL US, 3.2 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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