Plymouth, MN Frost Dates
The last spring frost in Plymouth usually comes around April 23 and the first fall frost around October 18.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | April 23 | October 18 |
| Hard freeze, 28°F | April 13 | October 29 |
Growing season: about 176 days.
Frequently asked questions
When is the last frost in Plymouth, MN?
The median date of the last spring frost (32°F) is April 23. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past April 23 lowers the risk for tender plants.
When is the first frost in Plymouth?
The median date of the first fall frost (32°F) is October 18, and a hard freeze (28°F) usually follows around October 29.
How long is the growing season in Plymouth?
About 176 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00014922. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.