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Frost dates / Indiana / Mishawaka

Frost dates in Mishawaka, IN

The station on this page is SOUTH BEND MICHIANA RGNL AP, IN US (USW00014848), 8.1 miles from the city point. Population in the Census 2024 estimate is 51,020.

Zone 6aUSDA average annual extreme minimum -10°F to -5°F, from ZIP 46545 (1.5 miles from the city point used on this page).

Median last 32°F is May 1. Median first 32°F is October 19. The 50% growing-season length is 170 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.

ProbabilityDateHow to read it
90%April 16Earlier date. A last 32°F on or after this day is common.
50%May 1Median.
10%May 17Later 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.

ProbabilityDateHow to read it
10%October 5Earlier date. A first 32°F on or before this day is uncommon.
50%October 19Median.
90%November 1Later 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 longDays
10%189
50%170
90%149

28°F threshold

10%50%90%
Last, on or afterMay 5April 19April 4
First, on or beforeOctober 19October 31November 13
Season at least212 days193 days171 days

36°F threshold

10%50%90%
Last, on or afterMay 27May 11April 27
First, on or beforeSeptember 25October 7October 19
Season at least167 days148 days127 days

Station SOUTH BEND MICHIANA RGNL AP, IN US (USW00014848). 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 235.6 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.

Check a crop against this station

Mishawaka, IN

Zone 6aAverage annual extreme minimum -10°F to -5°F

Median last 32°F is May 1. Median first 32°F is October 19. The 50% growing-season length is 170 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%

Indiana. Nearest qualified station: SOUTH BEND MICHIANA RGNL AP, IN US (USW00014848), 8.1 miles. Median last 32°F May 1. Median first 32°F October 19. The 50% growing-season length is 170 days.

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32°F probabilities at this station
10%50%90%
Last 32°F on or afterMay 17May 1April 16
First 32°F on or beforeOctober 5October 19November 1

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 Indiana 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.

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