Frost Dates: First and last frost dates for Mtn Pass, CA
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 7, there's a 50/50 chance of frost — check weather forecasts carefully if planting now
- Before April 23, 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 19 | Feb 5 | Jan 24 | Jan 13 | Dec 31 | Dec 9 | -- | -- | -- |
| Last 20° | Mar 20 | Mar 4 | Feb 21 | Feb 10 | Jan 31 | Jan 20 | Jan 6 | Dec 11 | -- |
| Last 24° | Apr 13 | Mar 28 | Mar 16 | Mar 6 | Feb 25 | Feb 16 | Feb 6 | Jan 25 | Jan 9 |
| Last 28° | May 6 | Apr 24 | Apr 15 | Apr 7 | Mar 31 | Mar 24 | Mar 16 | Mar 7 | Feb 23 |
| Last 32° | May 19 | May 9 | May 1 | Apr 25 | Apr 19 | Apr 13 | Apr 6 | Mar 29 | Mar 19 |
| Last 36° | May 29 | May 21 | May 16 | May 11 | May 7 | May 3 | Apr 28 | Apr 23 | Apr 15 |
ℹ️ How to read these charts for the fall
As summer ends in Mtn Pass, CA, 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° | Nov 30 | Dec 12 | Dec 21 | Dec 29 | Jan 10 | -- | -- | -- | -- |
| First 20° | Nov 15 | Nov 27 | Dec 5 | Dec 13 | Dec 21 | Dec 29 | Jan 10 | -- | -- |
| First 24° | Nov 6 | Nov 13 | Nov 18 | Nov 22 | Nov 26 | Nov 30 | Dec 5 | Dec 10 | Dec 17 |
| First 28° | Nov 1 | Nov 6 | Nov 10 | Nov 14 | Nov 17 | Nov 20 | Nov 24 | Nov 28 | Dec 3 |
| First 32° | Oct 14 | Oct 20 | Oct 25 | Oct 29 | Nov 1 | Nov 5 | Nov 9 | Nov 14 | Nov 20 |
| First 36° | Oct 7 | Oct 13 | Oct 17 | Oct 21 | Oct 24 | Oct 28 | Oct 31 | Nov 5 | Nov 10 |
📍 Frost Dates for other nearby locations
- Mitchell Caverns, CA 36.4 mi
- Searchlight, NV 43.1 mi
- Las Vegas, NV 49.3 mi
- Boulder City, NV 59.8 mi
- Pahrump, NV 65.2 mi
- Willow Beach, AZ 67.1 mi
- Desert Nwr, NV 68.2 mi
- Needles Ap, CA 80.4 mi
- Daggett Ap, CA 95.9 mi
- Iron Mtn, CA 96.1 mi
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Data is provided by the NOAA National Centers for Environmental Information.