Rock Island County, Illinois · Frost dates
Rock Island County frost dates.
First-frost, last-frost, and growing-season length for Rock Island County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-09
- 20%
- 05-04
- 50%
- 04-24
- 80%
- 04-14
- 90%
- 04-09
First fall frost
- 10%
- 10-04
- 20%
- 10-09
- 50%
- 10-18
- 80%
- 10-25
- 90%
- 10-28
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-23
- 50%
- 04-12
- 80%
- 04-03
- 90%
- 03-30
First fall freeze
- 10%
- 10-15
- 20%
- 10-20
- 50%
- 10-27
- 80%
- 11-03
- 90%
- 11-07
Growing season length (days, 28°F threshold)
- Short year
- 168
- Median
- 198
- Long year
- 222
Source NOAA station
MOLINE QUAD CITY INTL AP, IL US
2.5 mi · 30 yrs of record (1991–2020) · 592 ft elev.
Data from MOLINE QUAD CITY INTL AP, IL US, 2.5 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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