Franklin County, Missouri · Frost dates

Franklin County frost dates.

First-frost, last-frost, and growing-season length for Franklin County, Missouri. Sourced from NOAA 1991-2020 Climate Normals.

Data confidence: high · USDA zone: 6a

32°F — light freeze

Last spring frost

10%
04-28
20%
04-21
50%
04-11
80%
03-31
90%
03-26

First fall frost

10%
10-09
20%
10-14
50%
10-23
80%
11-01
90%
11-05

28°F — killing freeze

Last spring freeze

10%
04-15
20%
04-09
50%
03-31
80%
03-19
90%
03-12

First fall freeze

10%
10-21
20%
10-26
50%
11-03
80%
11-12
90%
11-18

Growing season length (days, 28°F threshold)

Short year
189
Median
217
Long year
251

Source NOAA station

UNION, MO US

4.3 mi · 30 yrs of record (19912020) · 540 ft elev.

Data from UNION, MO US, 4.3 miles away with 30-year NOAA record (1991-2020).

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