Frost dates for 91934Jacumba, CA
The average last spring frost in Jacumba is April 29 and the average first fall frost is November 1, giving a typical growing season of about 184 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 29
- Average first fall frost
- Nov 1
- Growing season
- 184 days
Safer after Jun 1 (1-in-10 risk)
Possible by Oct 5 (1-in-10 risk)
First frost typically in 5 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 2 · May 31 · Jun 23 | Sep 12 · Oct 8 · Nov 1 | 132 days | 100% |
| Frost / freeze (32°F) | Apr 7 · Apr 29 · Jun 1 | Oct 5 · Nov 1 · Nov 23 | 184 days | 100% |
| Hard freeze (28°F) | Feb 23 · Mar 31 · Apr 26 | Oct 29 · Nov 27 · Dec 18 | 240 days | 100% |
Planting calendar for Jacumba
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 | Mar 29 – Jun 4 |
| Tomatoes | Transplant outdoors | May 15 – Jul 12 |
| Peppers | Start seeds indoors | Mar 29 – Apr 29 |
| Peppers | Transplant outdoors | May 29 – Jun 29 |
| Eggplant | Start seeds indoors | Apr 15 – May 14 |
| Eggplant | Transplant outdoors | May 29 – Jun 29 |
| Cucumbers | Sow outdoors | May 29 – Jul 22 |
| Summer squash | Sow outdoors | May 15 – Jun 29 |
| Winter squash & pumpkins | Sow outdoors | May 29 – Jun 29 |
| Snap beans | Sow outdoors | May 15 – Aug 14 |
| Sweet corn | Sow outdoors | May 15 – Jul 12 |
| Watermelon & cantaloupe | Sow outdoors | May 29 – Jun 29 |
| Okra | Sow outdoors | May 22 – Jun 14 |
| Peas | Sow outdoors (spring) | Mar 29 – May 14 |
| Potatoes | Plant outdoors (spring) | Mar 29 – May 29 |
| Onions | Start seeds indoors (spring) | Feb 15 – Mar 14 |
| Onions | Transplant outdoors (spring) | Apr 15 – May 14 |
| Broccoli | Start seeds indoors (spring) | Mar 11 – Apr 14 |
| Broccoli | Transplant outdoors (spring) | Apr 15 – May 14 |
| Broccoli | Start seeds indoors (fall) | Jul 2 – Jul 12 |
| Broccoli | Transplant outdoors (fall) | Aug 1 – Aug 12 |
| Cabbage | Start seeds indoors (spring) | Mar 1 – Mar 29 |
| Cabbage | Transplant outdoors (spring) | Mar 29 – Apr 29 |
| Cabbage | Start seeds indoors (fall) | Jun 22 – Jul 22 |
| Cabbage | Transplant outdoors (fall) | Jul 22 – Aug 22 |
| Leaf lettuce | Sow outdoors (spring) | Mar 29 – Jun 14 |
| Leaf lettuce | Sow outdoors (fall) | Jul 22 – Sep 7 |
| Spinach | Sow outdoors (spring) | Mar 22 – May 5 |
| Spinach | Sow outdoors (fall) | Aug 8 – Sep 12 |
| Radishes | Sow outdoors (spring) | Mar 29 – May 19 |
| Radishes | Sow outdoors (fall) | Jul 22 – Sep 22 |
| Kale | Sow outdoors (spring) | Apr 15 – May 5 |
| Kale | Sow outdoors (fall) | Jul 15 – Aug 22 |
| Carrots | Sow outdoors (spring) | Apr 29 – Jun 14 |
| Carrots | Sow outdoors (fall) | Jun 22 – Aug 7 |
| Garlic | Plant outdoors (fall) | Oct 22 – Nov 22 |
Where these dates come from
ZIP code 91934 is matched to the NOAA station Campo Asos, CA, 25.6 km away, at 2,641 ft elevation (305 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Campo Asos, CA (used) | 2,641 ft | Apr 29 | Nov 1 |
| Campo, CA | 2,630 ft | Apr 30 | Oct 26 |
| Mt Laguna #3, CA | 5,920 ft | Apr 22 | Nov 8 |
| El Centro Naf, CA | -42 ft | Jan 6 | Dec 21 |
Frost dates near Jacumba
- Boulevard, CA 91905 · last Mar 27, first Dec 1
- Ocotillo, CA 92259 · last Jan 6, first Dec 21
- Campo, CA 91906 · last Apr 29, first Nov 1
- Mount Laguna, CA 91948 · last Apr 22, first Nov 8
- Pine Valley, CA 91962 · last Mar 27, first Dec 1
- Potrero, CA 91963 · last Apr 30, first Oct 26
- Tecate, CA 91980 · last Feb 12, first Dec 24
- Guatay, CA 91931 · last Mar 27, first Dec 1
Frequently asked questions
- When is the last frost in Jacumba, CA?
- For ZIP code 91934, the average last spring frost (32°F) is April 29, based on NOAA 1991-2020 climate normals for the Campo Asos, CA weather station. There is a 1-in-10 chance of a frost after June 1.
- When is the first frost in Jacumba, CA?
- The average first fall frost (32°F) is November 1. There is a 1-in-10 chance of frost by October 5, so tender plants are at risk from that point on.
- How long is the growing season in 91934?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 184 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.