Frost dates / Minnesota / St. Cloud

Frost dates in St. Cloud, MN

The station on this page is ST CLOUD RGNL AP, MN US (USW00014926), 5.9 miles from the city point. Population in the Census 2024 estimate is 72,145.

Zone 4bUSDA average annual extreme minimum -25°F to -20°F, from ZIP 56387 (3.5 miles from the city point used on this page).

Median last 32°F is May 7. Median first 32°F is September 30. The 50% growing-season length is 144 days. The green band runs from the median last frost to the median first frost. Thin ticks mark the 10%, 50%, and 90% dates.

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Last 32°F in spring

NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.

Probability	Date	How to read it
90%	April 24	Earlier date. A last 32°F on or after this day is common.
50%	May 7	Median.
10%	May 23	Later date. A last 32°F on or after this day is uncommon.

First 32°F in fall

NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.

Probability	Date	How to read it
10%	September 16	Earlier date. A first 32°F on or before this day is uncommon.
50%	September 30	Median.
90%	October 12	Later date. A first 32°F on or before this day is common.

32°F growing-season length

Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.

Probability the season is at least this long	Days
10%	163
50%	144
90%	122

28°F threshold

	10%	50%	90%
Last, on or after	May 11	April 27	April 12
First, on or before	September 25	October 8	October 23
Season at least	183 days	164 days	142 days

36°F threshold

	10%	50%	90%
Last, on or after	June 1	May 18	May 4
First, on or before	September 8	September 22	October 3
Season at least	143 days	123 days	104 days

Station ST CLOUD RGNL AP, MN US (USW00014926). Completeness flag S, 30 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 310.3 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

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St. Cloud, MN

Zone 4bAverage annual extreme minimum -25°F to -20°F

Outside the median season Growing seasonTicks: 10%, 50%, and 90%

Minnesota. Nearest qualified station: ST CLOUD RGNL AP, MN US (USW00014926), 5.9 miles. Median last 32°F May 7. Median first 32°F September 30. The 50% growing-season length is 144 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	May 23	May 7	April 24
First 32°F on or before	September 16	September 30	October 12

Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.

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Planting calendar

Frost dates for Minnesota are above. Planting windows appear for states with a cited extension guide. The fall and seed tools use the numbers you enter and the station dates.

Date checks use your device’s calendar and appear after the page loads.