Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95620 (Dixon, CA)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Davis 2 WSW EXP Farm, CA (9 miles away).
- Average last spring frostFeb 1050% chance of a 32°F freeze after this date
- Average first fall frostDec 150% chance of a 32°F freeze by this date
- Growing season (frost-free)295 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
No soil station with a fresh reading within 62 miles.
4-inch depth
No soil station with a fresh reading within 62 miles.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 95620 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring February to March; fall September to October.
Fertilizer window
Lawn region: California coastal and valleys. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about Mar 28 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
- Lettuce: fall sowing Sep 22–Oct 20
- Lettuce: fall transplant Oct 6–27
- Spinach: fall sowing Oct 6–27
- Bok choy / Asian greens: fall sowing Oct 6–20
- Arugula: fall sowing Oct 6–Nov 3
- Mustard greens: fall sowing Oct 6–20
- Cilantro: fall sowing Oct 6–20
- Dill: fall sowing Oct 6–20
- Strawberry (plants): fall transplant Sep 22–Oct 20
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 1: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Dec 31 (prior Dec) |
| 50% (the "average" last frost) | Feb 10 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 11 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Nov 13 |
| 50% (the "average" first frost) | Dec 1 |
| 90% (late: most years have frozen by now) | Dec 27 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 22 | Nov 16 |
| 32°F (freeze) | Feb 10 | Dec 1 |
| 28°F (hard freeze) | Jan 6 | Dec 18 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 95620
Dates count from your average last spring frost (Feb 10) and first fall frost (Dec 1). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Dec 16–30 | Feb 17–Mar 3 (transplant) | Aug 4–Sep 1 (transplant) |
| Pepper (sweet and hot) | Dec 2–16 | Feb 24–Mar 10 (transplant) | Aug 11–Sep 1 (transplant) |
| Eggplant | Dec 2–16 | Feb 24–Mar 10 (transplant) | Aug 11–Sep 1 (transplant) |
| Tomatillo | Dec 16–30 | Feb 17–Mar 3 (transplant) | – |
| Lettuce | Dec 16–30 | Jan 20–Feb 10 (transplant) Jan 13–Feb 24 (sow outdoors) | Oct 6–27 (transplant) Sep 22–Oct 20 (sowing) |
| Spinach | – | Dec 30–Jan 20 (sow outdoors) | Oct 6–27 (sowing) |
| Kale | Dec 16–30 | Jan 13–27 (transplant) Jan 13–27 (sow outdoors) | Sep 8–Oct 6 (transplant) Aug 25–Sep 22 (sowing) |
| Collards | Dec 16–30 | Jan 13–Feb 10 (transplant) Jan 13–Feb 10 (sow outdoors) | Sep 8–Oct 6 (transplant) Aug 25–Sep 22 (sowing) |
| Broccoli | Dec 2–16 | Jan 13–27 (transplant) | Aug 25–Sep 22 (transplant) |
| Cabbage | Dec 2–16 | Jan 13–27 (transplant) | Aug 25–Sep 22 (transplant) |
| Cauliflower | Dec 2–16 | Jan 27–Feb 10 (transplant) | Aug 25–Sep 22 (transplant) |
| Brussels sprouts | Nov 18–Dec 2 | Jan 13–27 (transplant) | Aug 11–Sep 1 (transplant) |
| Kohlrabi | Dec 16–30 | Jan 13–27 (transplant) Jan 13–27 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Bok choy / Asian greens | – | Jan 13–27 (sow outdoors) | Oct 6–20 (sowing) |
| Arugula | – | Jan 13–Feb 10 (sow outdoors) | Oct 6–Nov 3 (sowing) |
| Mustard greens | – | Jan 13–Feb 3 (sow outdoors) | Oct 6–20 (sowing) |
| Swiss chard | Dec 30–Jan 13 | Jan 27–Feb 17 (transplant) Jan 27–Feb 24 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Beet | – | Jan 13–Feb 10 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Carrot | – | Jan 20–Feb 17 (sow outdoors) | Sep 8–22 (sowing) |
| Radish | – | Jan 6–Feb 17 (sow outdoors) | Oct 20–Nov 3 (sowing) |
| Turnip | – | Jan 13–Feb 3 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Parsnip | – | Jan 20–Feb 10 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 16–Jan 13 (sow outdoors) | Sep 8–22 (sowing) |
| Onion (bulbing) | Nov 18–Dec 2 | Dec 30–Jan 13 (transplant) | – |
| Green onion / scallion | – | Dec 30–Jan 27 (sow outdoors) | Sep 22–Oct 6 (sowing) |
| Leek | Nov 18–Dec 2 | Jan 13–27 (transplant) | – |
| Garlic | – | – | Oct 20–Nov 17 (sowing) |
| Shallot | – | Dec 30–Jan 13 (transplant) | Oct 20–Nov 17 (sowing) |
| Potato | – | Jan 13–27 (transplant) | Aug 11–25 (transplant) |
| Sweet potato | – | Mar 3–17 (transplant) | – |
| Sweet corn | – | Feb 17–Mar 3 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 17–Mar 3 (sow outdoors) | Sep 8–22 (sowing) |
| Bean, pole | – | Feb 17–Mar 3 (sow outdoors) | – |
| Lima bean | – | Feb 24–Mar 10 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 3–24 (sow outdoors) | – |
| Cucumber | Jan 13–20 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | Sep 8–22 (sowing) |
| Summer squash / zucchini | Jan 13–20 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | Sep 8–22 (sowing) |
| Winter squash | Jan 13–20 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | – |
| Pumpkin | – | Feb 17–Mar 3 (sow outdoors) | – |
| Watermelon | Jan 13–20 | Feb 24–Mar 10 (transplant) Feb 24–Mar 10 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 13–20 | Feb 24–Mar 10 (transplant) Feb 24–Mar 10 (sow outdoors) | – |
| Okra | Dec 30–Jan 13 | Feb 24–Mar 10 (transplant) Feb 24–Mar 10 (sow outdoors) | – |
| Celery | Nov 18–Dec 2 | Feb 17–24 (transplant) | – |
| Basil | Dec 30–Jan 13 | Feb 17–Mar 3 (transplant) Feb 17–Mar 3 (sow outdoors) | – |
| Cilantro | – | Jan 27–Feb 24 (sow outdoors) | Oct 6–20 (sowing) |
| Parsley | Dec 2–16 | Jan 27–Feb 10 (transplant) Jan 20–Feb 10 (sow outdoors) | – |
| Dill | – | Feb 10–24 (sow outdoors) | Oct 6–20 (sowing) |
| Sunflower | – | Feb 10–24 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 13–27 (transplant) | – |
| Rhubarb (crowns) | – | Jan 13–27 (transplant) | – |
| Strawberry (plants) | – | Jan 13–27 (transplant) | Sep 22–Oct 20 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Where these numbers come from
Station: Davis 2 WSW EXP Farm, CA (NOAA GHCN-Daily ID USC00042294), elevation 60 ft, 9.1 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Vacaville Nut Tree AP, CA | 11 mi | Feb 18 | Nov 28 |
| Vacaville, CA | 11 mi | Jan 31 | Dec 11 |
| Winters, CA | 15 mi | Feb 18 | Nov 30 |
The average last-frost dates of these stations span 18 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95620
When is the last frost in 95620?
The average (50% chance) last spring freeze of 32°F for ZIP 95620 is February 10. For a more cautious planting date, use March 11, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95620?
The average first fall freeze is December 1. In 1 year in 10 it comes by November 13.
What hardiness zone is 95620?
ZIP 95620 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 95620 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
95625 Elmira 95612 Clarksburg 95618 Davis 95687 Vacaville 95616 Davis 95615 Courtland 94535 Fairfield 95831 Sacramento
Other ZIP codes in Solano County
94510 94512 94533 94534 94535 94571 94585 94589 94590 94591 94592 95625 95687 95688 All Solano County frost dates · California frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.