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Frost dates / Connecticut / Milford city (balance)

Frost dates in Milford city (balance), CT

The station on this page is BRIDGEPORT SIKORSKY MEM AP, CT US (USW00094702), 5.6 miles from the city point. Population in the Census 2024 estimate is 51,004.

Zone 7aUSDA average annual extreme minimum 0°F to 5°F, from ZIP 06460 (1 miles from the city point used on this page).

Median last 32°F is April 5. Median first 32°F is November 6. The 50% growing-season length is 216 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%March 25Earlier date. A last 32°F on or after this day is common.
50%April 5Median.
10%April 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 25Earlier date. A first 32°F on or before this day is uncommon.
50%November 6Median.
90%November 20Later 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%234
50%216
90%198

28°F threshold

10%50%90%
Last, on or afterApril 6March 26March 11
First, on or beforeNovember 6November 19December 5
Season at least259 days238 days221 days

36°F threshold

10%50%90%
Last, on or afterApril 29April 16April 6
First, on or beforeOctober 11October 26November 8
Season at least210 days194 days175 days

Station BRIDGEPORT SIKORSKY MEM AP, CT US (USW00094702). 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 1.5 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

Milford city (balance), CT

Zone 7aAverage annual extreme minimum 0°F to 5°F

Median last 32°F is April 5. Median first 32°F is November 6. The 50% growing-season length is 216 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%

Connecticut. Nearest qualified station: BRIDGEPORT SIKORSKY MEM AP, CT US (USW00094702), 5.6 miles. Median last 32°F April 5. Median first 32°F November 6. The 50% growing-season length is 216 days.

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32°F probabilities at this station
10%50%90%
Last 32°F on or afterApril 17April 5March 25
First 32°F on or beforeOctober 25November 6November 20

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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Frost dates for Connecticut 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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