DeKalb County, Illinois · Frost dates
DeKalb County frost dates.
First-frost, last-frost, and growing-season length for DeKalb County, Illinois. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-10
- 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%
- 10-26
- 90%
- 10-31
28°F — killing freeze
Last spring freeze
- 10%
- 04-29
- 20%
- 04-24
- 50%
- 04-13
- 80%
- 04-03
- 90%
- 03-30
First fall freeze
- 10%
- 10-14
- 20%
- 10-19
- 50%
- 10-28
- 80%
- 11-07
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 168
- Median
- 198
- Long year
- 227
Source NOAA station
DE KALB, IL US
2.8 mi · 30 yrs of record (1991–2020) · 873 ft elev.
Data from DE KALB, IL US, 2.8 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.