Frost Dates: First and last frost dates for Faulkton, SD

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 June 14, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
  • Around May 22, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
  • Before May 6, 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° Apr 18 Apr 11 Apr 6 Apr 3 Mar 30 Mar 26 Mar 22 Mar 18 Mar 11
Last 20° Apr 29 Apr 22 Apr 18 Apr 14 Apr 10 Apr 6 Apr 2 Mar 29 Mar 22
Last 24° May 6 May 1 Apr 28 Apr 24 Apr 22 Apr 19 Apr 16 Apr 12 Apr 7
Last 28° May 16 May 11 May 7 May 4 May 1 Apr 28 Apr 25 Apr 21 Apr 16
Last 32° May 24 May 19 May 15 May 12 May 9 May 6 May 3 Apr 29 Apr 24
Last 36° Jun 14 Jun 6 May 31 May 26 May 22 May 17 May 12 May 6 Apr 29

ℹ️ How to read these charts for the fall

As summer ends in Faulkton, SD, 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 September 17, there's a 20% chance of 32°F — start monitoring forecasts and have plant covers ready
2
Decision time: By September 24, there's a 50% chance of frost — harvest tomatoes, peppers, and other tender crops or prepare protection
3
Last chance: By October 1, 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 October 1 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° Oct 12 Oct 18 Oct 23 Oct 27 Oct 30 Nov 3 Nov 7 Nov 11 Nov 17
First 20° Oct 1 Oct 8 Oct 13 Oct 17 Oct 21 Oct 25 Oct 29 Nov 3 Nov 10
First 24° Sep 26 Oct 1 Oct 5 Oct 9 Oct 12 Oct 15 Oct 18 Oct 22 Oct 28
First 28° Sep 16 Sep 21 Sep 24 Sep 27 Sep 30 Oct 3 Oct 6 Oct 10 Oct 15
First 32° Sep 13 Sep 17 Sep 19 Sep 22 Sep 24 Sep 26 Sep 28 Oct 1 Oct 4
First 36° Aug 27 Sep 2 Sep 6 Sep 9 Sep 12 Sep 15 Sep 19 Sep 23 Sep 28

📍 Frost Dates for other nearby locations

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