Frost Dates: First and last frost dates for Fern Ridge-veneta, 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 May 29, you have a 90% chance of being frost-free — this is your "safe date" for planting tender crops
- Around May 6, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before April 22, 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° | Jan 20 | Jan 4 | Dec 17 | -- | -- | -- | -- | -- | -- |
| Last 20° | Feb 4 | Jan 25 | Jan 16 | Jan 8 | Dec 31 | Dec 18 | -- | -- | -- |
| Last 24° | Feb 27 | Feb 16 | Feb 7 | Jan 30 | Jan 23 | Jan 15 | Jan 7 | Dec 26 | -- |
| Last 28° | Mar 12 | Mar 3 | Feb 24 | Feb 19 | Feb 14 | Feb 9 | Feb 3 | Jan 28 | Jan 19 |
| Last 32° | May 9 | Apr 26 | Apr 17 | Apr 10 | Apr 3 | Mar 27 | Mar 19 | Mar 10 | Feb 26 |
| Last 36° | May 29 | May 21 | May 16 | May 11 | May 6 | May 2 | Apr 27 | Apr 22 | Apr 14 |
ℹ️ How to read these charts for the fall
As summer ends in Fern Ridge-veneta, 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 18 | Jan 2 | Jan 18 | -- | -- | -- | -- | -- | -- |
| First 20° | Dec 6 | Dec 20 | Dec 31 | Jan 11 | Jan 23 | Feb 14 | -- | -- | -- |
| First 24° | Nov 16 | Nov 29 | Dec 8 | Dec 17 | Dec 24 | Jan 2 | Jan 11 | Jan 24 | -- |
| First 28° | Nov 2 | Nov 12 | Nov 20 | Nov 26 | Dec 2 | Dec 8 | Dec 14 | Dec 21 | Dec 31 |
| First 32° | Oct 12 | Oct 19 | Oct 24 | Oct 29 | Nov 2 | Nov 6 | Nov 10 | Nov 15 | Nov 23 |
| First 36° | Sep 28 | Oct 5 | Oct 11 | Oct 15 | Oct 19 | Oct 24 | Oct 28 | Nov 2 | Nov 10 |
📍 Frost Dates for other nearby locations
- Eugene-mahlon Sweet Fld, OR 10.5 mi
- Drain, OR 26.6 mi
- Cottage Grove, OR 28.6 mi
- Cottage Grove Dam, OR 30.6 mi
- Dorena, OR 32.6 mi
- Corvallis Water Bureau, OR 32.6 mi
- Elkton, OR 35.5 mi
- Lookout Point Dam, OR 41.9 mi
- Corvallis State Univ, OR 42.0 mi
- Tidewater, OR 45.7 mi
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Data is provided by the NOAA National Centers for Environmental Information.