Frost Dates: First and last frost dates for Strawberry Valley, CA

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 26, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
  • Around June 6, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
  • Before May 23, 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° Feb 25 Feb 7 Jan 24 Jan 11 Dec 27 Dec 6 -- -- --
Last 20° Mar 27 Mar 10 Feb 26 Feb 15 Feb 4 Jan 23 Jan 8 Dec 12 --
Last 24° Apr 28 Apr 16 Apr 8 Mar 31 Mar 24 Mar 17 Mar 10 Mar 2 Feb 18
Last 28° May 15 May 8 May 2 Apr 28 Apr 23 Apr 19 Apr 15 Apr 9 Apr 2
Last 32° Jun 9 Jun 2 May 28 May 23 May 19 May 15 May 11 May 6 Apr 29
Last 36° Jun 26 Jun 19 Jun 14 Jun 9 Jun 6 Jun 2 May 28 May 23 May 17

ℹ️ How to read these charts for the fall

As summer ends in Strawberry Valley, CA, 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 6, there's a 20% chance of 32°F — start monitoring forecasts and have plant covers ready
2
Decision time: By October 21, there's a 50% chance of frost — harvest tomatoes, peppers, and other tender crops or prepare protection
3
Last chance: By November 4, 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 4 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° Nov 26 Dec 13 Dec 27 Jan 9 Jan 24 Feb 19 -- -- --
First 20° Nov 20 Dec 5 Dec 16 Dec 26 Jan 5 Jan 16 Jan 31 -- --
First 24° Nov 4 Nov 13 Nov 19 Nov 25 Nov 30 Dec 6 Dec 11 Dec 18 Dec 27
First 28° Oct 17 Oct 24 Oct 30 Nov 3 Nov 7 Nov 11 Nov 16 Nov 21 Nov 28
First 32° Sep 28 Oct 6 Oct 11 Oct 16 Oct 21 Oct 25 Oct 30 Nov 4 Nov 12
First 36° Sep 11 Sep 19 Sep 25 Sep 30 Oct 5 Oct 10 Oct 15 Oct 21 Oct 29

📍 Frost Dates for other nearby locations

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