Mercer County, Missouri · Frost dates
Mercer County frost dates.
First-frost, last-frost, and growing-season length for Mercer County, Missouri. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-08
- 20%
- 05-04
- 50%
- 04-25
- 80%
- 04-15
- 90%
- 04-11
First fall frost
- 10%
- 09-30
- 20%
- 10-05
- 50%
- 10-15
- 80%
- 10-25
- 90%
- 10-29
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-23
- 50%
- 04-14
- 80%
- 04-04
- 90%
- 03-31
First fall freeze
- 10%
- 10-11
- 20%
- 10-17
- 50%
- 10-26
- 80%
- 11-02
- 90%
- 11-08
Growing season length (days, 28°F threshold)
- Short year
- 166
- Median
- 195
- Long year
- 222
Source NOAA station
PRINCETON, MO US
1.8 mi · 30 yrs of record (1991–2020) · 980 ft elev.
Data from PRINCETON, MO US, 1.8 miles away with 30-year NOAA record (1991-2020).
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