St. Louis city, Missouri · Frost dates
St. Louis city frost dates.
First-frost, last-frost, and growing-season length for St. Louis city, Missouri. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-18
- 20%
- 04-11
- 50%
- 04-01
- 80%
- 03-21
- 90%
- 03-14
First fall frost
- 10%
- 10-24
- 20%
- 10-28
- 50%
- 11-04
- 80%
- 11-14
- 90%
- 11-21
28°F — killing freeze
Last spring freeze
- 10%
- 04-07
- 20%
- 04-03
- 50%
- 03-22
- 80%
- 03-10
- 90%
- 03-05
First fall freeze
- 10%
- 11-02
- 20%
- 11-05
- 50%
- 11-15
- 80%
- 11-28
- 90%
- 12-04
Growing season length (days, 28°F threshold)
- Short year
- 209
- Median
- 238
- Long year
- 274
Source NOAA station
ST LOUIS SCI CTR, MO US
1.5 mi · 30 yrs of record (1991–2020) · 515 ft elev.
Data from ST LOUIS SCI CTR, MO US, 1.5 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.