Frost Dates: First and last frost dates for Cave Junction, 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 June 20, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around June 2, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before May 21, 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.
| Temperature | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| Last 16° | Feb 1 | Jan 18 | Jan 5 | Dec 20 | -- | -- | -- | -- | -- |
| Last 20° | Feb 19 | Feb 4 | Jan 24 | Jan 13 | Jan 2 | Dec 19 | -- | -- | -- |
| Last 24° | Mar 19 | Mar 4 | Feb 22 | Feb 12 | Feb 3 | Jan 25 | Jan 15 | Jan 1 | Dec 8 |
| Last 28° | May 1 | Apr 23 | Apr 17 | Apr 13 | Apr 8 | Apr 4 | Mar 30 | Mar 24 | Mar 16 |
| Last 32° | May 27 | May 20 | May 15 | May 10 | May 6 | May 2 | Apr 28 | Apr 23 | Apr 16 |
| Last 36° | Jun 20 | Jun 13 | Jun 9 | Jun 5 | Jun 2 | May 29 | May 25 | May 21 | May 14 |
ℹ️ How to read these charts for the fall
As summer ends in Cave Junction, 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:
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.
| Temperature | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| First 16° | Dec 12 | Dec 30 | Jan 15 | Feb 9 | -- | -- | -- | -- | -- |
| First 20° | Nov 18 | Dec 6 | Dec 19 | Jan 1 | Jan 16 | Feb 6 | -- | -- | -- |
| First 24° | Nov 10 | Nov 22 | Nov 30 | Dec 8 | Dec 15 | Dec 23 | Jan 1 | Jan 13 | -- |
| First 28° | Oct 9 | Oct 21 | Oct 30 | Nov 6 | Nov 12 | Nov 19 | Nov 26 | Dec 5 | Dec 16 |
| First 32° | Sep 23 | Sep 30 | Oct 5 | Oct 9 | Oct 12 | Oct 16 | Oct 20 | Oct 25 | Nov 1 |
| First 36° | Sep 1 | Sep 8 | Sep 13 | Sep 18 | Sep 22 | Sep 26 | Sep 30 | Oct 6 | Oct 13 |
📍 Frost Dates for other nearby locations
- Grants Pass, OR 27.6 mi
- Happy Camp Rs, CA 28.0 mi
- Sexton Summit, OR 35.9 mi
- Ruch, OR 38.9 mi
- Brookings, OR 45.1 mi
- Illahe, OR 46.2 mi
- Crescent City, CA 48.6 mi
- Klamath, CA 50.8 mi
- Medford, OR 51.8 mi
- Medford, OR 53.2 mi
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Data is provided by the NOAA National Centers for Environmental Information.