Frost dates for 93527Inyokern, CA
The average last spring frost in Inyokern is March 9 and the average first fall frost is November 20, giving a typical growing season of about 250 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 9
- Average first fall frost
- Nov 20
- Growing season
- 250 days
Safer after Apr 8 (1-in-10 risk)
Possible by Nov 2 (1-in-10 risk)
First frost typically in 24 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Mar 9 · Apr 3 · Apr 26 | Oct 24 · Nov 8 · Nov 22 | 217 days | 100% |
| Frost / freeze (32°F) | Feb 16 · Mar 9 · Apr 8 | Nov 2 · Nov 20 · Dec 5 | 250 days | 100% |
| Hard freeze (28°F) | Jan 21 · Feb 18 · Mar 12 | Nov 14 · Dec 1 · Dec 16 | 286 days | 100% |
Planting calendar for Inyokern
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Feb 6 – Apr 14 |
| Tomatoes | Transplant outdoors | Mar 25 – Jul 31 |
| Peppers | Start seeds indoors | Feb 6 – Mar 9 |
| Peppers | Transplant outdoors | Apr 8 – May 9 |
| Eggplant | Start seeds indoors | Feb 23 – Mar 24 |
| Eggplant | Transplant outdoors | Apr 8 – May 9 |
| Cucumbers | Sow outdoors | Apr 8 – Aug 10 |
| Summer squash | Sow outdoors | Mar 25 – May 9 |
| Winter squash & pumpkins | Sow outdoors | Apr 8 – May 9 |
| Snap beans | Sow outdoors | Mar 25 – Sep 2 |
| Sweet corn | Sow outdoors | Mar 25 – Jul 31 |
| Watermelon & cantaloupe | Sow outdoors | Apr 8 – May 9 |
| Okra | Sow outdoors | Apr 1 – Apr 24 |
| Peas | Sow outdoors (spring) | Feb 6 – Mar 24 |
| Potatoes | Plant outdoors (spring) | Feb 6 – Apr 8 |
| Onions | Start seeds indoors (spring) | Dec 26 – Jan 22 |
| Onions | Transplant outdoors (spring) | Feb 23 – Mar 24 |
| Broccoli | Start seeds indoors (spring) | Jan 19 – Feb 22 |
| Broccoli | Transplant outdoors (spring) | Feb 23 – Mar 24 |
| Broccoli | Start seeds indoors (fall) | Jul 21 – Jul 31 |
| Broccoli | Transplant outdoors (fall) | Aug 20 – Aug 31 |
| Cabbage | Start seeds indoors (spring) | Jan 9 – Feb 6 |
| Cabbage | Transplant outdoors (spring) | Feb 6 – Mar 9 |
| Cabbage | Start seeds indoors (fall) | Jul 11 – Aug 10 |
| Cabbage | Transplant outdoors (fall) | Aug 10 – Sep 10 |
| Leaf lettuce | Sow outdoors (spring) | Feb 6 – Apr 24 |
| Leaf lettuce | Sow outdoors (fall) | Aug 10 – Sep 26 |
| Spinach | Sow outdoors (spring) | Jan 30 – Mar 15 |
| Spinach | Sow outdoors (fall) | Aug 27 – Oct 1 |
| Radishes | Sow outdoors (spring) | Feb 6 – Mar 29 |
| Radishes | Sow outdoors (fall) | Aug 10 – Oct 11 |
| Kale | Sow outdoors (spring) | Feb 23 – Mar 15 |
| Kale | Sow outdoors (fall) | Aug 3 – Sep 10 |
| Carrots | Sow outdoors (spring) | Mar 9 – Apr 24 |
| Carrots | Sow outdoors (fall) | Jul 11 – Aug 26 |
| Garlic | Plant outdoors (fall) | Nov 10 – Dec 11 |
Where these dates come from
ZIP code 93527 is matched to the NOAA station Inyokern, CA, 3.5 km away, at 2,430 ft elevation (175 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Inyokern, CA (used) | 2,430 ft | Mar 9 | Nov 20 |
| China Lake Naf, CA | 2,230 ft | Mar 11 | Nov 12 |
| Randsburg, CA | 3,570 ft | Mar 19 | Nov 25 |
| Trona, CA | 1,695 ft | Feb 15 | Nov 28 |
Frost dates near Inyokern
- Ridgecrest, CA 93555 · last Mar 11, first Nov 12
- Onyx, CA 93255 · last Apr 22, first Nov 13
- Randsburg, CA 93554 · last Mar 11, first Nov 12
- Little Lake, CA 93542 · last Apr 17, first Nov 1
- Johannesburg, CA 93528 · last Mar 19, first Nov 25
- Cantil, CA 93519 · last Mar 11, first Nov 12
- Weldon, CA 93283 · last May 11, first Oct 17
- Red Mountain, CA 93558 · last Mar 19, first Nov 25
Frequently asked questions
- When is the last frost in Inyokern, CA?
- For ZIP code 93527, the average last spring frost (32°F) is March 9, based on NOAA 1991-2020 climate normals for the Inyokern, CA weather station. There is a 1-in-10 chance of a frost after April 8.
- When is the first frost in Inyokern, CA?
- The average first fall frost (32°F) is November 20. There is a 1-in-10 chance of frost by November 2, so tender plants are at risk from that point on.
- How long is the growing season in 93527?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 250 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.