Frost Dates: First and last frost dates for Falls City #2, 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 16, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around May 24, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before May 9, 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 3 | Jan 21 | Jan 8 | Dec 24 | -- | -- | -- | -- | -- |
| Last 20° | Feb 18 | Feb 5 | Jan 27 | Jan 18 | Jan 10 | Dec 31 | Dec 16 | -- | -- |
| Last 24° | Feb 28 | Feb 18 | Feb 12 | Feb 6 | Jan 31 | Jan 26 | Jan 20 | Jan 12 | Jan 1 |
| Last 28° | Apr 22 | Apr 9 | Mar 30 | Mar 22 | Mar 14 | Mar 7 | Feb 27 | Feb 17 | Feb 4 |
| Last 32° | May 21 | May 13 | May 8 | May 3 | Apr 29 | Apr 24 | Apr 19 | Apr 14 | Apr 6 |
| Last 36° | Jun 16 | Jun 8 | Jun 2 | May 28 | May 24 | May 19 | May 14 | May 9 | May 1 |
ℹ️ How to read these charts for the fall
As summer ends in Falls City #2, 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 14 | Dec 28 | Jan 10 | Jan 27 | -- | -- | -- | -- | -- |
| First 20° | Nov 24 | Dec 9 | Dec 19 | Dec 29 | Jan 8 | Jan 19 | Feb 5 | -- | -- |
| First 24° | Nov 14 | Nov 24 | Nov 30 | Dec 6 | Dec 11 | Dec 17 | Dec 22 | Dec 30 | Jan 10 |
| First 28° | Oct 26 | Nov 4 | Nov 11 | Nov 16 | Nov 22 | Nov 27 | Dec 2 | Dec 9 | Dec 18 |
| First 32° | Oct 7 | Oct 13 | Oct 18 | Oct 22 | Oct 26 | Oct 30 | Nov 3 | Nov 8 | Nov 14 |
| First 36° | Sep 18 | Sep 25 | Sep 30 | Oct 4 | Oct 8 | Oct 12 | Oct 16 | Oct 21 | Oct 27 |
📍 Frost Dates for other nearby locations
- Dallas, OR 11.3 mi
- Corvallis State Univ, OR 23.2 mi
- Corvallis Water Bureau, OR 24.8 mi
- Salem Ap Mcnary Fld, OR 30.0 mi
- Mc Minnville, OR 30.9 mi
- Otis, OR 35.9 mi
- Cloverdale, OR 39.5 mi
- Stayton, OR 43.1 mi
- Tidewater, OR 45.2 mi
- Newport, OR 45.8 mi
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Data is provided by the NOAA National Centers for Environmental Information.