Frost Dates: First and last frost dates for Government Camp, 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 20, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
  • Around July 1, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
  • Before June 18, 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 1 Mar 18 Mar 8 Feb 27 Feb 18 Feb 10 Feb 1 Jan 21 Jan 3
Last 20° Apr 26 Apr 13 Apr 4 Mar 27 Mar 20 Mar 13 Mar 5 Feb 24 Feb 11
Last 24° May 9 May 2 Apr 26 Apr 22 Apr 17 Apr 13 Apr 9 Apr 3 Mar 27
Last 28° May 26 May 20 May 15 May 12 May 8 May 5 May 1 Apr 27 Apr 20
Last 32° Jun 27 Jun 20 Jun 16 Jun 12 Jun 9 Jun 5 Jun 1 May 28 May 22
Last 36° Jul 20 Jul 14 Jul 9 Jul 5 Jul 1 Jun 27 Jun 23 Jun 18 Jun 11

ℹ️ How to read these charts for the fall

As summer ends in Government Camp, 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 September 12, 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 6, 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 6 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 4 Nov 15 Nov 23 Dec 1 Dec 7 Dec 14 Dec 21 Dec 30 Jan 13
First 20° Nov 3 Nov 12 Nov 18 Nov 24 Nov 29 Dec 4 Dec 9 Dec 16 Dec 24
First 24° Oct 19 Oct 27 Nov 2 Nov 7 Nov 12 Nov 17 Nov 22 Nov 28 Dec 6
First 28° Sep 30 Oct 6 Oct 10 Oct 14 Oct 18 Oct 21 Oct 25 Oct 30 Nov 5
First 32° Sep 6 Sep 12 Sep 17 Sep 21 Sep 24 Sep 27 Oct 1 Oct 6 Oct 12
First 36° Aug 14 Aug 21 Aug 25 Aug 29 Sep 2 Sep 6 Sep 10 Sep 14 Sep 21

📍 Frost Dates for other nearby locations

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