Frost dates / Indiana / Hammond

Frost dates in Hammond, IN

The station on this page is PARK FOREST, IL US (USC00116616), 12.9 miles from the city point. Population in the Census 2024 estimate is 76,030.

Zone 6aUSDA average annual extreme minimum -10°F to -5°F, from ZIP 46320 (0.7 miles from the city point used on this page).

Median last 32°F is April 23. Median first 32°F is October 20. The 50% growing-season length is 179 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 9	Earlier date. A last 32°F on or after this day is common.
50%	April 23	Median.
10%	May 11	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 20	Median.
90%	November 1	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%	198
50%	179
90%	159

28°F threshold

	10%	50%	90%
Last, on or after	April 27	April 12	March 30
First, on or before	October 18	October 30	November 15
Season at least	222 days	202 days	180 days

36°F threshold

	10%	50%	90%
Last, on or after	May 24	May 5	April 20
First, on or before	September 27	October 10	October 22
Season at least	175 days	157 days	136 days

Station PARK FOREST, IL US (USC00116616). Completeness flag S, 26 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 216.4 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

Hammond, 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: PARK FOREST, IL US (USC00116616), 12.9 miles. Median last 32°F April 23. Median first 32°F October 20. The 50% growing-season length is 179 days.

Open the ZIP page

32°F probabilities at this station

	10%	50%	90%
Last 32°F on or after	May 11	April 23	April 9
First 32°F on or before	October 6	October 20	November 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.

A wall calendar surrounded by vegetables, herbs, seed packets, and watering cans.

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.

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