Bureau County, Illinois · Frost dates
Bureau County frost dates.
First-frost, last-frost, and growing-season length for Bureau County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-07
- 20%
- 05-01
- 50%
- 04-22
- 80%
- 04-14
- 90%
- 04-09
First fall frost
- 10%
- 10-03
- 20%
- 10-08
- 50%
- 10-17
- 80%
- 10-25
- 90%
- 10-29
28°F — killing freeze
Last spring freeze
- 10%
- 04-26
- 20%
- 04-20
- 50%
- 04-12
- 80%
- 04-04
- 90%
- 03-31
First fall freeze
- 10%
- 10-14
- 20%
- 10-19
- 50%
- 10-27
- 80%
- 11-03
- 90%
- 11-09
Growing season length (days, 28°F threshold)
- Short year
- 171
- Median
- 198
- Long year
- 223
Source NOAA station
PRINCETON, IL US
4.7 mi · 30 yrs of record (1991–2020) · 697 ft elev.
Data from PRINCETON, IL US, 4.7 miles away with 30-year NOAA record (1991-2020).
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