Frost Dates: First and last frost dates for Malin, OR

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 July 25, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
  • Around July 7, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
  • Before June 25, 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 14 Apr 6 Mar 30 Mar 25 Mar 20 Mar 15 Mar 10 Mar 3 Feb 23
Last 20° May 9 May 1 Apr 25 Apr 20 Apr 15 Apr 10 Apr 5 Mar 30 Mar 22
Last 24° May 23 May 16 May 11 May 7 May 3 Apr 29 Apr 25 Apr 20 Apr 13
Last 28° Jun 5 May 30 May 26 May 22 May 19 May 15 May 12 May 7 May 1
Last 32° Jun 29 Jun 23 Jun 19 Jun 15 Jun 11 Jun 8 Jun 4 May 31 May 24
Last 36° Jul 25 Jul 19 Jul 14 Jul 11 Jul 7 Jul 4 Jun 30 Jun 25 Jun 19

ℹ️ How to read these charts for the fall

As summer ends in Malin, OR, 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 August 29, there's a 20% chance of 32°F — start monitoring forecasts and have plant covers ready
2
Decision time: By September 8, there's a 50% chance of frost — harvest tomatoes, peppers, and other tender crops or prepare protection
3
Last chance: By September 18, 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 September 18 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 21 Oct 27 Oct 31 Nov 3 Nov 7 Nov 10 Nov 13 Nov 18 Nov 23
First 20° Oct 10 Oct 15 Oct 19 Oct 22 Oct 25 Oct 28 Nov 1 Nov 5 Nov 10
First 24° Sep 23 Sep 28 Oct 1 Oct 4 Oct 7 Oct 10 Oct 13 Oct 16 Oct 21
First 28° Sep 7 Sep 12 Sep 16 Sep 20 Sep 23 Sep 27 Sep 30 Oct 4 Oct 10
First 32° Aug 24 Aug 29 Sep 2 Sep 5 Sep 8 Sep 11 Sep 15 Sep 18 Sep 23
First 36° Aug 5 Aug 11 Aug 16 Aug 19 Aug 23 Aug 26 Aug 30 Sep 4 Sep 10

📍 Frost Dates for other nearby locations

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