Frost dates / Indiana / Fishers

Frost dates in Fishers, IN

The station on this page is CARMEL 3 E, IN US (USC00121303), 4.8 miles from the city point. Population in the Census 2024 estimate is 103,986.

Zone 6aUSDA average annual extreme minimum -10°F to -5°F, from ZIP 46037 (1.3 miles from the city point used on this page).

Median last 32°F is April 21. Median first 32°F is October 21. The 50% growing-season length is 183 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 5	Earlier date. A last 32°F on or after this day is common.
50%	April 21	Median.
10%	May 8	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%	October 6	Earlier date. A first 32°F on or before this day is uncommon.
50%	October 21	Median.
90%	November 2	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%	204
50%	183
90%	160

28°F threshold

	10%	50%	90%
Last, on or after	April 26	April 8	March 25
First, on or before	October 18	November 1	November 17
Season at least	227 days	206 days	184 days

36°F threshold

	10%	50%	90%
Last, on or after	May 16	May 2	April 17
First, on or before	September 28	October 11	October 24
Season at least	181 days	162 days	143 days

Station CARMEL 3 E, IN US (USC00121303). Completeness flag R, 20 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 229.2 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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Fishers, IN

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

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

Indiana. Nearest qualified station: CARMEL 3 E, IN US (USC00121303), 4.8 miles. Median last 32°F April 21. Median first 32°F October 21. The 50% growing-season length is 183 days.

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32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	May 8	April 21	April 5
First 32°F on or before	October 6	October 21	November 2

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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