Frost Dates for Danville, CA 94526
Last spring frost February 27 · First fall frost December 13 · 289 frost-free days · USDA Zone 9b
ZIP 94526 has about 32,600 people, the largest of 2 ZIP codes in Danville.
Very long season: 289 frost-free days. Spring frost risk spans January 22–April 7 (75 days). Fall frost risk spans November 11–January 14 (64 days).
Frost probability for 94526
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 7 | February 27 | January 22 |
| Fall (first frost) | November 11 | December 13 | January 14 |
Dates come from NOAA 1971–2000 freeze probabilities at LIVERMORE (25.3 km away); the 50% date is the median year.
Frost dates by ZIP code in Danville, CA
| ZIP | Last spring frost (50%) | First fall frost (50%) | Zone |
|---|---|---|---|
| 94526 | February 27 | December 13 | 9b |
| 94506 | February 27 | December 1 | 9b |
Which crops fit a 289-day season in Danville
In Danville (289 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 | Jan 23 | Mar 13–Mar 20 | 247 | fits: 80 days to maturity, 247 available after Mar 13. | Aug 13 |
| Pepper | Jan 16 | Mar 13–Mar 20 | 247 | fits: 75 days to maturity, 247 available after Mar 13. | Aug 18 |
| Lettuce | Jan 2 | Jan 30–Feb 6 | 324 | two-plantings: Plant Jan 30 and again by Oct 22; both mature before Dec 20. | Oct 22 |
| Carrots | — | Feb 6–Feb 13 | 331 | fits: 70 days to maturity, 331 available after Feb 6. | Oct 11 |
| Cucumber | Feb 6 | Mar 13–Mar 20 | 261 | two-plantings: Plant Mar 13 and again by Sep 16; both mature before Nov 29. | Sep 16 |
| Beans | — | Mar 6–Mar 20 | 275 | two-plantings: Plant Mar 6 and again by Sep 23; both mature before Dec 6. | Sep 23 |
| Peas | — | Jan 2–Mar 13 | 352 | fits: 65 days to maturity, 352 available after Jan 2. | Oct 2 |
| Zucchini | Feb 13 | Mar 13–Mar 20 | 261 | two-plantings: Plant Mar 13 and again by Sep 21; both mature before Nov 29. | Sep 21 |
| Onion | Dec 5 | Jan 30–Feb 13 | 324 | fits: 100 days to maturity, 324 available after Jan 30. | — |
| Spinach | — | Jan 2–Feb 20 | 366 | two-plantings: Plant Jan 2 and again by Nov 10; both mature before Jan 3. | Nov 10 |
| Kale | Dec 19 | Jan 30–Feb 13 | 338 | two-plantings: Plant Jan 30 and again by Oct 26; both mature before Jan 3. | Oct 26 |
| Broccoli | Jan 2 | Jan 30–Feb 13 | 324 | fits: 80 days to maturity, 324 available after Jan 30. | Sep 17 |
| Cabbage | Jan 2 | Jan 30–Feb 13 | 338 | fits: 70 days to maturity, 338 available after Jan 30. | Oct 11 |
| Radish | — | Jan 2–Mar 27 | 352 | two-plantings: Plant Jan 2 and again by Nov 11; both mature before Dec 20. | Nov 11 |
| Beets | — | Jan 2–Mar 27 | 352 | two-plantings: Plant Jan 2 and again by Oct 12; both mature before Dec 20. | Oct 12 |
| Potatoes | — | Feb 13–Feb 20 | 310 | fits: 90 days to maturity, 310 available after Feb 13. | — |
| Garlic | — | Dec 13 | 394 | overwinter: Plant Dec 13 to Jan 3; harvest the following summer. | Jan 3 |
| Strawberry | — | Jan 23–Mar 20 | 345 | perennial: A perennial: plant Jan 23; it fruits from the following year and keeps producing for several years. | — |
| Corn | Jan 30 | Mar 6–Mar 13 | 261 | fits: 75 days to maturity, 261 available after Mar 6. | Aug 25 |
| Pumpkin | Feb 13 | Mar 13–Mar 13 | 254 | fits: 100 days to maturity, 254 available after Mar 13. | Jul 31 |
| Cauliflower | Jan 16 | Feb 20–Mar 6 | 303 | fits: 75 days to maturity, 303 available after Feb 20. | Sep 22 |
| Swiss Chard | Jan 2 | Feb 13–Feb 13 | 310 | two-plantings: Plant Feb 13 and again by Oct 12; both mature before Dec 20. | Oct 12 |
| Arugula | — | Jan 2–Mar 27 | 366 | two-plantings: Plant Jan 2 and again by Nov 10; both mature before Jan 3. | Nov 10 |
| Brussel Sprouts | Jan 2 | Jan 30–Feb 13 | 338 | fits: 100 days to maturity, 338 available after Jan 30. | Sep 11 |
| Butternut Squash | Feb 13 | Mar 13–Mar 20 | 254 | fits: 100 days to maturity, 254 available after Mar 13. | Jul 31 |
| Eggplant | Jan 9 | Mar 13–Mar 20 | 247 | fits: 70 days to maturity, 247 available after Mar 13. | Aug 23 |
| Okra | Jan 30 | Mar 6–Mar 13 | 268 | two-plantings: Plant Mar 6 and again by Sep 21; both mature before Nov 29. | Sep 21 |
| Basil | Jan 23 | Mar 20–Mar 20 | 254 | two-plantings: Plant Mar 20 and again by Sep 16; both mature before Nov 29. | Sep 16 |
| Cilantro | — | Jan 30–Feb 20 | 324 | two-plantings: Plant Jan 30 and again by Oct 17; both mature before Dec 20. | Oct 17 |
| Parsley | Dec 19 | Mar 6–Mar 13 | 289 | fits: 70 days to maturity, 289 available after Mar 6. | Sep 27 |
| Celery | Dec 19 | Mar 6–Mar 20 | 289 | fits: 120 days to maturity, 289 available after Mar 6. | Aug 8 |
| Scallions | Dec 19 | Jan 30–Feb 13 | 338 | two-plantings: Plant Jan 30 and again by Oct 21; both mature before Jan 3. | Oct 21 |
| Turnip | — | Jan 30–Feb 13 | 338 | two-plantings: Plant Jan 30 and again by Oct 31; both mature before Jan 3. | Oct 31 |
| Kohlrabi | — | Jan 16–Jan 30 | 352 | two-plantings: Plant Jan 16 and again by Oct 26; both mature before Jan 3. | Oct 26 |
| Bok Choy | Jan 30 | Feb 20–Feb 27 | 303 | two-plantings: Plant Feb 20 and again by Oct 22; both mature before Dec 20. | Oct 22 |
| Collards | Dec 19 | Jan 30–Feb 13 | 338 | two-plantings: Plant Jan 30 and again by Oct 21; both mature before Jan 3. | Oct 21 |
| Cantaloupe | Feb 13 | Mar 13–Mar 20 | 247 | fits: 85 days to maturity, 247 available after Mar 13. | Aug 8 |
| Chives | Dec 5 | Mar 6–Mar 13 | 303 | fits: 90 days to maturity, 303 available after Mar 6. | — |
| Dill | — | Jan 2–Mar 27 | 352 | two-plantings: Plant Jan 2 and again by Oct 12; both mature before Dec 20. | Oct 12 |
| Oregano | Dec 19 | Mar 6–Mar 13 | 303 | fits: 80 days to maturity, 303 available after Mar 6. | — |
| Rosemary | Dec 5 | Mar 6–Mar 13 | 289 | fits: 80 days to maturity, 289 available after Mar 6. | — |
| Sage | Jan 2 | Mar 6–Mar 13 | 303 | fits: 75 days to maturity, 303 available after Mar 6. | — |
| Thyme | Dec 19 | Mar 6–Mar 13 | 303 | fits: 90 days to maturity, 303 available after Mar 6. | — |
| Calendula | Jan 16 | Feb 13–Feb 27 | 310 | two-plantings: Plant Feb 13 and again by Oct 17; both mature before Dec 20. | Oct 17 |
| Cosmos | Jan 30 | Feb 27–Mar 13 | 275 | two-plantings: Plant Feb 27 and again by Sep 16; both mature before Nov 29. | Sep 16 |
| Lavender | Dec 5 | Feb 27–Mar 13 | 310 | fits: 90 days to maturity, 310 available after Feb 27. | — |
| Marigolds | Jan 16 | Feb 27–Mar 6 | 275 | two-plantings: Plant Feb 27 and again by Sep 26; both mature before Nov 29. | Sep 26 |
| Melons | Feb 13 | Mar 13–Mar 20 | 247 | fits: 85 days to maturity, 247 available after Mar 13. | Aug 8 |
| Mint | — | Feb 27–Mar 13 | 310 | fits: 90 days to maturity, 310 available after Feb 27. | — |
| Nasturtiums | Jan 30 | Feb 27–Mar 6 | 275 | two-plantings: Plant Feb 27 and again by Sep 21; both mature before Nov 29. | Sep 21 |
| Pole Beans | — | Mar 6–Mar 20 | 268 | fits: 65 days to maturity, 268 available after Mar 6. | Sep 11 |
| Spaghetti Squash | Feb 13 | Mar 13–Mar 20 | 254 | fits: 90 days to maturity, 254 available after Mar 13. | Aug 10 |
| Sunflowers | — | Feb 27–Mar 13 | 275 | fits: 70 days to maturity, 275 available after Feb 27. | Sep 6 |
| Tomatillos | Jan 2 | Mar 6–Mar 13 | 254 | fits: 75 days to maturity, 254 available after Mar 6. | Aug 18 |
| Watermelon | Feb 13 | Mar 6–Mar 13 | 254 | fits: 80 days to maturity, 254 available after Mar 6. | Aug 13 |
| Yellow Squash | Feb 13 | Mar 13–Mar 20 | 261 | two-plantings: Plant Mar 13 and again by Sep 21; both mature before Nov 29. | Sep 21 |
| Zinnias | Jan 30 | Feb 27–Mar 13 | 275 | two-plantings: Plant Feb 27 and again by Sep 16; both mature before Nov 29. | Sep 16 |
Month by month in Danville
| Month | What to do |
|---|---|
| January | Start indoors: Broccoli (Jan 2), Brussel Sprouts (Jan 2), Cabbage (Jan 2), Lettuce (Jan 2), Sage (Jan 2), Swiss Chard (Jan 2), +14 more. Direct sow from: Arugula (Jan 2), Beets (Jan 2), Dill (Jan 2), Peas (Jan 2), Radish (Jan 2), Spinach (Jan 2), +3 more. Transplant from: Broccoli (Jan 30), Brussel Sprouts (Jan 30), Cabbage (Jan 30), Collards (Jan 30), Kale (Jan 30), Lettuce (Jan 30), +2 more. Plant: Strawberry (Jan 23). Last sowing dates: Garlic (Jan 3). |
| February | Start indoors: Cucumber (Feb 6), Butternut Squash (Feb 13), Cantaloupe (Feb 13), Melons (Feb 13), Pumpkin (Feb 13), Spaghetti Squash (Feb 13), +3 more. Direct sow from: Carrots (Feb 6), Potatoes (Feb 13), Sunflowers (Feb 27). Transplant from: Calendula (Feb 13), Swiss Chard (Feb 13), Bok Choy (Feb 20), Cauliflower (Feb 20), Cosmos (Feb 27), Lavender (Feb 27), +4 more. Last frost around February 27. |
| March | Direct sow from: Beans (Mar 6), Pole Beans (Mar 6). Transplant from: Celery (Mar 6), Chives (Mar 6), Corn (Mar 6), Okra (Mar 6), Oregano (Mar 6), Parsley (Mar 6), +17 more. |
| April | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| May | Harvest regularly to encourage production. Monitor for pests and disease. |
| June | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| July | Last sowing dates: Butternut Squash (Jul 31), Pumpkin (Jul 31). |
| August | Last sowing dates: Cantaloupe (Aug 8), Celery (Aug 8), Melons (Aug 8), Spaghetti Squash (Aug 10), Tomato (Aug 13), Watermelon (Aug 13), +4 more. |
| September | Last sowing dates: Sunflowers (Sep 6), Brussel Sprouts (Sep 11), Pole Beans (Sep 11), Basil (Sep 16), Cosmos (Sep 16), Cucumber (Sep 16), +10 more. |
| October | Last sowing dates: Peas (Oct 2), Cabbage (Oct 11), Carrots (Oct 11), Beets (Oct 12), Dill (Oct 12), Swiss Chard (Oct 12), +9 more. |
| November | Last sowing dates: Arugula (Nov 10), Spinach (Nov 10), Radish (Nov 11). |
| December | Start indoors: Chives (Dec 5), Lavender (Dec 5), Onion (Dec 5), Rosemary (Dec 5), Celery (Dec 19), Collards (Dec 19), +5 more. Direct sow from: Garlic (Dec 13). First frost around December 13. |
Frequently Asked Questions
What is the last frost date for Danville, CA (ZIP 94526)?
The median last spring frost date for Danville, CA (ZIP code 94526) is around February 27. 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. One year in ten frost ends before January 22; one in ten it runs past April 7.
What is the first fall frost date in Danville, CA?
The median first fall frost date for Danville, CA is around December 13. 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 11 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Danville, CA?
The frost-free growing season in Danville is about 289 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 Danville (289 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 Danville, CA?
Danville, CA is in USDA hardiness zone 9b (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 Danville, CA?
Start tomatoes indoors Jan 23 and plant out Mar 13 in Danville. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Danville?
Two: plant Jan 30 and again by Oct 22; both mature before Dec 20.
When do I plant garlic in Danville?
Dec 13 to Jan 3; it overwinters and is ready the following summer.
Can I get two tomato crops in Danville?
Yes: plant out Mar 13 for a summer crop, and set out a second round of transplants by Aug 13 for a fall crop.
Which nearby ZIP has a longer season?
Alamo (ZIP 94507) has 313 frost-free days, 24 more than Danville (ZIP 94526). See Alamo ZIP 94507 frost dates
Nearby and related
- Frost dates for Alamo, CA 94507 (3 mi)
- Frost dates for San Ramon, CA 94582 (5.2 mi)
- Frost dates for Walnut Creek, CA 94598 (5.4 mi)
- Frost dates for Moraga, CA 94556 (6.6 mi)
- Frost dates for Clayton, CA 94517 (7.7 mi)
- 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