Frost Dates: First and last frost dates for Bridgeport Sikorsky Ap, CT

ℹ️ How to read these charts for the spring

As spring unfolds, the risk of frost gradually decreases each day until your tender plants are finally safe. The probabilities shown in the chart help you make smart decisions about when to plant.

While frost typically forms at 32°F, tender plants can be damaged even when temperatures are slightly higher. Air temperatures are often measured several feet above the ground, but temperatures at plant level can be several degrees colder. Protected areas like porches help by blocking radiational cooling. Given these variables, we consider 36°F the "caution zone" for frost-sensitive plants.

Key dates for your spring planting:

  • By May 1, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
  • Around April 20, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
  • Before April 14, there's still an 80% risk of frost — too early for tomatoes and other tender plants unless you're prepared to protect them

If the 10-day forecast shows no temperatures below 40°F, you might safely plant earlier than the above dates suggest. Many gardeners watch for this weather window to get a head start on the growing season.

In the Spring
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
Last 16° Mar 17 Mar 11 Mar 7 Mar 3 Feb 28 Feb 24 Feb 20 Feb 16 Feb 10
Last 20° Mar 24 Mar 19 Mar 15 Mar 11 Mar 8 Mar 5 Mar 2 Feb 26 Feb 20
Last 24° Apr 2 Mar 28 Mar 25 Mar 23 Mar 20 Mar 18 Mar 15 Mar 12 Mar 8
Last 28° Apr 7 Apr 3 Apr 1 Mar 29 Mar 27 Mar 25 Mar 22 Mar 20 Mar 16
Last 32° Apr 22 Apr 18 Apr 15 Apr 13 Apr 11 Apr 8 Apr 6 Apr 3 Mar 30
Last 36° May 1 Apr 27 Apr 25 Apr 23 Apr 20 Apr 18 Apr 16 Apr 14 Apr 10

ℹ️ How to read these charts for the fall

As summer ends in Bridgeport Sikorsky Ap, CT, nighttime temperatures begin to drop, and your risk of frost increases with each passing day. Knowing when to expect frost helps you harvest sensitive crops and extend your growing season with protection methods.

The chart below shows the probability of experiencing specific temperatures on various dates. Here's what this means for your garden:

1
Early warning: Around October 25, there's a 20% chance of 32°F — start monitoring forecasts and have plant covers ready
2
Decision time: By November 4, there's a 50% chance of frost — harvest tomatoes, peppers, and other tender crops or prepare protection
3
Last chance: By November 14, there's an 80% chance of seeing 32°F — most tender plants will be damaged without protection
4
Another perspective: You have only a 1 in 5 chance of making it past November 14 without a freezing night

These probabilities help you time your end-of-season harvests and know when to apply protective measures like row covers, cloches, or cold frames to extend your harvest.

In the Fall
Temperature 10% 20% 30% 40% 50% 60% 70% 80% 90%
First 16° Dec 6 Dec 11 Dec 15 Dec 18 Dec 21 Dec 25 Dec 28 Jan 1 Jan 6
First 20° Nov 22 Nov 29 Dec 3 Dec 7 Dec 11 Dec 15 Dec 18 Dec 23 Dec 29
First 24° Nov 14 Nov 20 Nov 23 Nov 27 Nov 30 Dec 2 Dec 6 Dec 9 Dec 15
First 28° Nov 4 Nov 9 Nov 13 Nov 16 Nov 19 Nov 22 Nov 26 Nov 29 Dec 5
First 32° Oct 20 Oct 25 Oct 29 Nov 1 Nov 4 Nov 7 Nov 10 Nov 14 Nov 19
First 36° Oct 3 Oct 8 Oct 12 Oct 15 Oct 18 Oct 21 Oct 24 Oct 27 Nov 1

📍 Frost Dates for other nearby locations

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Data is provided by the NOAA National Centers for Environmental Information.