Frost dates for 92352Lake Arrowhead, CA
The average last spring frost in Lake Arrowhead is May 5 and the average first fall frost is November 2, giving a typical growing season of about 176 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 5
- Average first fall frost
- Nov 2
- Growing season
- 176 days
Safer after May 31 (1-in-10 risk)
Possible by Oct 12 (1-in-10 risk)
First frost typically in 4 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) | May 3 · May 27 · Jun 10 | Sep 30 · Oct 18 · Nov 5 | 145 days | 100% |
| Frost / freeze (32°F) | Apr 9 · May 5 · May 31 | Oct 12 · Nov 2 · Nov 15 | 176 days | 100% |
| Hard freeze (28°F) | Mar 14 · Apr 11 · May 12 | Oct 31 · Nov 16 · Nov 30 | 215 days | 100% |
Planting calendar for Lake Arrowhead
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 | Apr 4 – Jun 10 |
| Tomatoes | Transplant outdoors | May 21 – Jul 13 |
| Peppers | Start seeds indoors | Apr 4 – May 5 |
| Peppers | Transplant outdoors | Jun 4 – Jul 5 |
| Eggplant | Start seeds indoors | Apr 21 – May 20 |
| Eggplant | Transplant outdoors | Jun 4 – Jul 5 |
| Cucumbers | Sow outdoors | Jun 4 – Jul 23 |
| Summer squash | Sow outdoors | May 21 – Jul 5 |
| Winter squash & pumpkins | Sow outdoors | Jun 4 – Jul 5 |
| Snap beans | Sow outdoors | May 21 – Aug 15 |
| Sweet corn | Sow outdoors | May 21 – Jul 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 4 – Jul 5 |
| Okra | Sow outdoors | May 28 – Jun 20 |
| Peas | Sow outdoors (spring) | Apr 4 – May 20 |
| Potatoes | Plant outdoors (spring) | Apr 4 – Jun 4 |
| Onions | Start seeds indoors (spring) | Feb 21 – Mar 20 |
| Onions | Transplant outdoors (spring) | Apr 21 – May 20 |
| Broccoli | Start seeds indoors (spring) | Mar 17 – Apr 20 |
| Broccoli | Transplant outdoors (spring) | Apr 21 – May 20 |
| Broccoli | Start seeds indoors (fall) | Jul 3 – Jul 13 |
| Broccoli | Transplant outdoors (fall) | Aug 2 – Aug 13 |
| Cabbage | Start seeds indoors (spring) | Mar 7 – Apr 4 |
| Cabbage | Transplant outdoors (spring) | Apr 4 – May 5 |
| Cabbage | Start seeds indoors (fall) | Jun 23 – Jul 23 |
| Cabbage | Transplant outdoors (fall) | Jul 23 – Aug 23 |
| Leaf lettuce | Sow outdoors (spring) | Apr 4 – Jun 20 |
| Leaf lettuce | Sow outdoors (fall) | Jul 23 – Sep 8 |
| Spinach | Sow outdoors (spring) | Mar 28 – May 11 |
| Spinach | Sow outdoors (fall) | Aug 9 – Sep 13 |
| Radishes | Sow outdoors (spring) | Apr 4 – May 25 |
| Radishes | Sow outdoors (fall) | Jul 23 – Sep 23 |
| Kale | Sow outdoors (spring) | Apr 21 – May 11 |
| Kale | Sow outdoors (fall) | Jul 16 – Aug 23 |
| Carrots | Sow outdoors (spring) | May 5 – Jun 20 |
| Carrots | Sow outdoors (fall) | Jun 23 – Aug 8 |
| Garlic | Plant outdoors (fall) | Oct 23 – Nov 23 |
Where these dates come from
ZIP code 92352 is matched to the NOAA station Lake Arrowhead, CA, 2 km away, at 5,205 ft elevation (38 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Lake Arrowhead, CA (used) | 5,205 ft | May 5 | Nov 2 |
| Hesperia 2E, CA | 3,055 ft | Feb 28 | Dec 1 |
| Redlands, CA | 1,410 ft | Jan 27 | Dec 19 |
| Big Bear Lake, CA | 6,753 ft | May 27 | Oct 4 |
Frost dates near Lake Arrowhead
- Skyforest, CA 92385 · last May 5, first Nov 2
- Twin Peaks, CA 92391 · last May 5, first Nov 2
- Rimforest, CA 92378 · last May 5, first Nov 2
- Cedar Glen, CA 92321 · last May 5, first Nov 2
- Crestline, CA 92325 · last May 5, first Nov 2
- Running Springs, CA 92382 · last May 27, first Oct 4
- Cedarpines Park, CA 92322 · last May 5, first Nov 2
- Blue Jay, CA 92317 · last May 27, first Oct 4
Frequently asked questions
- When is the last frost in Lake Arrowhead, CA?
- For ZIP code 92352, the average last spring frost (32°F) is May 5, based on NOAA 1991-2020 climate normals for the Lake Arrowhead, CA weather station. There is a 1-in-10 chance of a frost after May 31.
- When is the first frost in Lake Arrowhead, CA?
- The average first fall frost (32°F) is November 2. There is a 1-in-10 chance of frost by October 12, so tender plants are at risk from that point on.
- How long is the growing season in 92352?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 176 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.