Frost Dates for San Bernardino, CA 92404
San Bernardino has 8 ZIP codes. The San Bernardino, CA frost page lists all of them with their dates.
Last spring frost January 26 · First fall frost December 15 · 323 frost-free days · USDA Zone 10a
ZIP 92404 has about 63,200 people, one of 8 ZIP codes in San Bernardino.
Very long season: 323 frost-free days.
Frost probability for 92404
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 9 | January 26 | — |
| Fall (first frost) | November 15 | December 15 | — |
Dates come from NOAA 1971–2000 freeze probabilities at REDLANDS (16.3 km away); the 50% date is the median year.
Which crops fit a 323-day season in San Bernardino
In San Bernardino (323 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Dec 22 | Feb 9–Feb 16 | 281 | fits: 80 days to maturity, 281 available after Feb 9. | Aug 15 |
| Pepper | Dec 15 | Feb 9–Feb 16 | 281 | fits: 75 days to maturity, 281 available after Feb 9. | Aug 20 |
| Lettuce | Dec 1 | Dec 29–Jan 5 | 358 | two-plantings: Plant Dec 29 and again by Oct 24; both mature before Dec 22. | Oct 24 |
| Carrots | — | Jan 5–Jan 12 | 365 | fits: 70 days to maturity, 365 available after Jan 5. | Oct 13 |
| Cucumber | Jan 5 | Feb 9–Feb 16 | 295 | two-plantings: Plant Feb 9 and again by Sep 18; both mature before Dec 1. | Sep 18 |
| Beans | — | Feb 2–Feb 16 | 309 | two-plantings: Plant Feb 2 and again by Sep 25; both mature before Dec 8. | Sep 25 |
| Peas | — | Dec 1–Feb 9 | 386 | fits: 65 days to maturity, 386 available after Dec 1. | Oct 4 |
| Zucchini | Jan 12 | Feb 9–Feb 16 | 295 | two-plantings: Plant Feb 9 and again by Sep 23; both mature before Dec 1. | Sep 23 |
| Onion | Nov 3 | Dec 29–Jan 12 | 358 | fits: 100 days to maturity, 358 available after Dec 29. | — |
| Spinach | — | Dec 1–Jan 19 | 400 | two-plantings: Plant Dec 1 and again by Nov 12; both mature before Jan 5. | Nov 12 |
| Kale | Nov 17 | Dec 29–Jan 12 | 372 | two-plantings: Plant Dec 29 and again by Oct 28; both mature before Jan 5. | Oct 28 |
| Broccoli | Dec 1 | Dec 29–Jan 12 | 358 | fits: 80 days to maturity, 358 available after Dec 29. | Sep 19 |
| Cabbage | Dec 1 | Dec 29–Jan 12 | 372 | fits: 70 days to maturity, 372 available after Dec 29. | Oct 13 |
| Radish | — | Dec 1–Feb 23 | 386 | two-plantings: Plant Dec 1 and again by Nov 13; both mature before Dec 22. | Nov 13 |
| Beets | — | Dec 1–Feb 23 | 386 | two-plantings: Plant Dec 1 and again by Oct 14; both mature before Dec 22. | Oct 14 |
| Potatoes | — | Jan 12–Jan 19 | 344 | fits: 90 days to maturity, 344 available after Jan 12. | — |
| Garlic | — | Dec 15 | 428 | overwinter: Plant Dec 15 to Jan 5; harvest the following summer. | Jan 5 |
| Strawberry | — | Dec 22–Feb 16 | 379 | perennial: A perennial: plant Dec 22; it fruits from the following year and keeps producing for several years. | — |
| Corn | Dec 29 | Feb 2–Feb 9 | 295 | fits: 75 days to maturity, 295 available after Feb 2. | Aug 27 |
| Pumpkin | Jan 12 | Feb 9–Feb 9 | 288 | fits: 100 days to maturity, 288 available after Feb 9. | Aug 2 |
| Cauliflower | Dec 15 | Jan 19–Feb 2 | 337 | fits: 75 days to maturity, 337 available after Jan 19. | Sep 24 |
| Swiss Chard | Dec 1 | Jan 12–Jan 12 | 344 | two-plantings: Plant Jan 12 and again by Oct 14; both mature before Dec 22. | Oct 14 |
| Arugula | — | Dec 1–Feb 23 | 400 | two-plantings: Plant Dec 1 and again by Nov 12; both mature before Jan 5. | Nov 12 |
| Brussel Sprouts | Dec 1 | Dec 29–Jan 12 | 372 | fits: 100 days to maturity, 372 available after Dec 29. | Sep 13 |
| Butternut Squash | Jan 12 | Feb 9–Feb 16 | 288 | fits: 100 days to maturity, 288 available after Feb 9. | Aug 2 |
| Eggplant | Dec 8 | Feb 9–Feb 16 | 281 | fits: 70 days to maturity, 281 available after Feb 9. | Aug 25 |
| Okra | Dec 29 | Feb 2–Feb 9 | 302 | two-plantings: Plant Feb 2 and again by Sep 23; both mature before Dec 1. | Sep 23 |
| Basil | Dec 22 | Feb 16–Feb 16 | 288 | two-plantings: Plant Feb 16 and again by Sep 18; both mature before Dec 1. | Sep 18 |
| Cilantro | — | Dec 29–Jan 19 | 358 | two-plantings: Plant Dec 29 and again by Oct 19; both mature before Dec 22. | Oct 19 |
| Parsley | Nov 17 | Feb 2–Feb 9 | 323 | fits: 70 days to maturity, 323 available after Feb 2. | Sep 29 |
| Celery | Nov 17 | Feb 2–Feb 16 | 323 | fits: 120 days to maturity, 323 available after Feb 2. | Aug 10 |
| Scallions | Nov 17 | Dec 29–Jan 12 | 372 | two-plantings: Plant Dec 29 and again by Oct 23; both mature before Jan 5. | Oct 23 |
| Turnip | — | Dec 29–Jan 12 | 372 | two-plantings: Plant Dec 29 and again by Nov 2; both mature before Jan 5. | Nov 2 |
| Kohlrabi | — | Dec 15–Dec 29 | 386 | two-plantings: Plant Dec 15 and again by Oct 28; both mature before Jan 5. | Oct 28 |
| Bok Choy | Dec 29 | Jan 19–Jan 26 | 337 | two-plantings: Plant Jan 19 and again by Oct 24; both mature before Dec 22. | Oct 24 |
| Collards | Nov 17 | Dec 29–Jan 12 | 372 | two-plantings: Plant Dec 29 and again by Oct 23; both mature before Jan 5. | Oct 23 |
| Cantaloupe | Jan 12 | Feb 9–Feb 16 | 281 | fits: 85 days to maturity, 281 available after Feb 9. | Aug 10 |
| Chives | Nov 3 | Feb 2–Feb 9 | 337 | fits: 90 days to maturity, 337 available after Feb 2. | — |
| Dill | — | Dec 1–Feb 23 | 386 | two-plantings: Plant Dec 1 and again by Oct 14; both mature before Dec 22. | Oct 14 |
| Oregano | Nov 17 | Feb 2–Feb 9 | 337 | fits: 80 days to maturity, 337 available after Feb 2. | — |
| Rosemary | Nov 3 | Feb 2–Feb 9 | 323 | fits: 80 days to maturity, 323 available after Feb 2. | — |
| Sage | Dec 1 | Feb 2–Feb 9 | 337 | fits: 75 days to maturity, 337 available after Feb 2. | — |
| Thyme | Nov 17 | Feb 2–Feb 9 | 337 | fits: 90 days to maturity, 337 available after Feb 2. | — |
| Calendula | Dec 15 | Jan 12–Jan 26 | 344 | two-plantings: Plant Jan 12 and again by Oct 19; both mature before Dec 22. | Oct 19 |
| Cosmos | Dec 29 | Jan 26–Feb 9 | 309 | two-plantings: Plant Jan 26 and again by Sep 18; both mature before Dec 1. | Sep 18 |
| Lavender | Nov 3 | Jan 26–Feb 9 | 344 | fits: 90 days to maturity, 344 available after Jan 26. | — |
| Marigolds | Dec 15 | Jan 26–Feb 2 | 309 | two-plantings: Plant Jan 26 and again by Sep 28; both mature before Dec 1. | Sep 28 |
| Melons | Jan 12 | Feb 9–Feb 16 | 281 | fits: 85 days to maturity, 281 available after Feb 9. | Aug 10 |
| Mint | — | Jan 26–Feb 9 | 344 | fits: 90 days to maturity, 344 available after Jan 26. | — |
| Nasturtiums | Dec 29 | Jan 26–Feb 2 | 309 | two-plantings: Plant Jan 26 and again by Sep 23; both mature before Dec 1. | Sep 23 |
| Pole Beans | — | Feb 2–Feb 16 | 302 | fits: 65 days to maturity, 302 available after Feb 2. | Sep 13 |
| Spaghetti Squash | Jan 12 | Feb 9–Feb 16 | 288 | fits: 90 days to maturity, 288 available after Feb 9. | Aug 12 |
| Sunflowers | — | Jan 26–Feb 9 | 309 | fits: 70 days to maturity, 309 available after Jan 26. | Sep 8 |
| Tomatillos | Dec 1 | Feb 2–Feb 9 | 288 | fits: 75 days to maturity, 288 available after Feb 2. | Aug 20 |
| Watermelon | Jan 12 | Feb 2–Feb 9 | 288 | fits: 80 days to maturity, 288 available after Feb 2. | Aug 15 |
| Yellow Squash | Jan 12 | Feb 9–Feb 16 | 295 | two-plantings: Plant Feb 9 and again by Sep 23; both mature before Dec 1. | Sep 23 |
| Zinnias | Dec 29 | Jan 26–Feb 9 | 309 | two-plantings: Plant Jan 26 and again by Sep 18; both mature before Dec 1. | Sep 18 |
Month by month in San Bernardino
| Month | What to do |
|---|---|
| January | Start indoors: Cucumber (Jan 5), Butternut Squash (Jan 12), Cantaloupe (Jan 12), Melons (Jan 12), Pumpkin (Jan 12), Spaghetti Squash (Jan 12), +3 more. Direct sow from: Carrots (Jan 5), Potatoes (Jan 12), Sunflowers (Jan 26). Transplant from: Calendula (Jan 12), Swiss Chard (Jan 12), Bok Choy (Jan 19), Cauliflower (Jan 19), Cosmos (Jan 26), Lavender (Jan 26), +4 more. Last frost around January 26. Last sowing dates: Garlic (Jan 5). |
| February | Direct sow from: Beans (Feb 2), Pole Beans (Feb 2). Transplant from: Celery (Feb 2), Chives (Feb 2), Corn (Feb 2), Okra (Feb 2), Oregano (Feb 2), Parsley (Feb 2), +17 more. |
| March | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| April | Harvest regularly to encourage production. Monitor for pests and disease. |
| May | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| June | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| July | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| August | Last sowing dates: Butternut Squash (Aug 2), Pumpkin (Aug 2), Cantaloupe (Aug 10), Celery (Aug 10), Melons (Aug 10), Spaghetti Squash (Aug 12), +6 more. |
| September | Last sowing dates: Sunflowers (Sep 8), Brussel Sprouts (Sep 13), Pole Beans (Sep 13), Basil (Sep 18), Cosmos (Sep 18), Cucumber (Sep 18), +10 more. |
| October | Last sowing dates: Peas (Oct 4), Cabbage (Oct 13), Carrots (Oct 13), Beets (Oct 14), Dill (Oct 14), Swiss Chard (Oct 14), +8 more. |
| November | Start indoors: Chives (Nov 3), Lavender (Nov 3), Onion (Nov 3), Rosemary (Nov 3), Celery (Nov 17), Collards (Nov 17), +5 more. Last sowing dates: Turnip (Nov 2), Arugula (Nov 12), Spinach (Nov 12), Radish (Nov 13). |
| December | Start indoors: Broccoli (Dec 1), Brussel Sprouts (Dec 1), Cabbage (Dec 1), Lettuce (Dec 1), Sage (Dec 1), Swiss Chard (Dec 1), +14 more. Direct sow from: Arugula (Dec 1), Beets (Dec 1), Dill (Dec 1), Peas (Dec 1), Radish (Dec 1), Spinach (Dec 1), +4 more. Transplant from: Broccoli (Dec 29), Brussel Sprouts (Dec 29), Cabbage (Dec 29), Collards (Dec 29), Kale (Dec 29), Lettuce (Dec 29), +2 more. Plant: Strawberry (Dec 22). First frost around December 15. |
Frequently Asked Questions
What is the last frost date for San Bernardino, CA (ZIP 92404)?
The median last spring frost date for San Bernardino, CA (ZIP code 92404) is around January 26. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.
What is the first fall frost date in San Bernardino, CA?
The median first fall frost date for San Bernardino, CA is around December 15. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around November 15 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in San Bernardino, CA?
The frost-free growing season in San Bernardino is about 323 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In San Bernardino (323 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is San Bernardino, CA?
San Bernardino, CA is in USDA hardiness zone 10a (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in San Bernardino, CA?
Start tomatoes indoors Dec 22 and plant out Feb 9 in San Bernardino. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in San Bernardino?
Two: plant Dec 29 and again by Oct 24; both mature before Dec 22.
When do I plant garlic in San Bernardino?
Dec 15 to Jan 5; it overwinters and is ready the following summer.
Can I get two tomato crops in San Bernardino?
Yes: plant out Feb 9 for a summer crop, and set out a second round of transplants by Aug 15 for a fall crop.
Which nearby ZIP has a longer season?
Loma Linda (ZIP 92354) has 337 frost-free days, 14 more than San Bernardino (ZIP 92404). See Loma Linda ZIP 92354 frost dates
Nearby and related
- Frost dates for Highland, CA 92346 (5 mi)
- Frost dates for Crestline, CA 92325 (5.1 mi)
- Frost dates for Redlands, CA 92374 (8.5 mi)
- Frost dates for Loma Linda, CA 92354 (8.9 mi)
- Frost dates for San Bernardino, CA 92407 (9.1 mi)
- When to plant in San Bernardino, CA: month-by-month guide
- When to plant in CA
- When to plant Peppers in CA
- When to plant Cucumbers in CA
- When to plant Zucchini in CA
- When to plant Butternut Squash in CA
- When to plant Basil in CA
- When to plant Sweet Corn in CA
- Look up another ZIP