Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95545 (Humboldt County, 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, Scotia, CA (15 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 84% of years (about 6 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
- Average last spring frostFeb 150% chance of a 32°F freeze after this date
- Average first fall frostDec 1950% chance of a 32°F freeze by this date
- Growing season (frost-free)328 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°F avg. coldest night
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Frost and freeze alerts from the NWS forecast for 95545, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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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
Freezes are uncommon here, so frost-based timing is rough. Local extension calendars for frost-free areas use months.
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 95545 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 19 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 Oct 10–Nov 7
- Kale: fall transplant Sep 26–Oct 24
- Collards: fall transplant Sep 26–Oct 24
- Kohlrabi: fall sowing Oct 10–24
- Swiss chard: fall sowing Oct 10–24
- Beet: fall sowing Oct 10–24
- Turnip: fall sowing Oct 10–24
- Green onion / scallion: fall sowing Oct 10–24
- Strawberry (plants): fall transplant Oct 10–Nov 7
Coming up in the next 3 weeks
- Lettuce: fall transplant Oct 24–Nov 14
- Spinach: fall sowing Oct 24–Nov 14
- Bok choy / Asian greens: fall sowing Oct 24–Nov 7
- Arugula: fall sowing Oct 24–Nov 21
- Mustard greens: fall sowing Oct 24–Nov 7
- Radish: fall sowing Nov 7–21
- Garlic: fall sowing Nov 7–Dec 5
- Shallot: fall sowing Nov 7–Dec 5
- Cilantro: fall sowing Oct 24–Nov 7
- Dill: fall sowing Oct 24–Nov 7
Prune now
No frost-timed pruning windows are open this week.
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 17 (prior Dec) |
| 50% (the "average" last frost) | Feb 1 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 8 |
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 19 |
| 50% (the "average" first frost) | Dec 19 |
| 90% (late: most years have frozen by now) | Feb 10 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 14 | Nov 23 |
| 32°F (freeze) | Feb 1 | Dec 19 |
| 28°F (hard freeze) | Jan 3 | Dec 31 |
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 95545
Dates count from your average last spring frost (Feb 1) and first fall frost (Dec 19). 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 7–21 | Feb 8–22 (transplant) | Aug 22–Sep 19 (transplant) |
| Pepper (sweet and hot) | Nov 23–Dec 7 | Feb 15–Mar 1 (transplant) | Aug 29–Sep 19 (transplant) |
| Eggplant | Nov 23–Dec 7 | Feb 15–Mar 1 (transplant) | Aug 29–Sep 19 (transplant) |
| Tomatillo | Dec 7–21 | Feb 8–22 (transplant) | – |
| Lettuce | Dec 7–21 | Jan 11–Feb 1 (transplant) Jan 4–Feb 15 (sow outdoors) | Oct 24–Nov 14 (transplant) Oct 10–Nov 7 (sowing) |
| Spinach | – | Dec 21–Jan 11 (sow outdoors) | Oct 24–Nov 14 (sowing) |
| Kale | Dec 7–21 | Jan 4–18 (transplant) Jan 4–18 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Collards | Dec 7–21 | Jan 4–Feb 1 (transplant) Jan 4–Feb 1 (sow outdoors) | Sep 26–Oct 24 (transplant) Sep 12–Oct 10 (sowing) |
| Broccoli | Nov 23–Dec 7 | Jan 4–18 (transplant) | Sep 12–Oct 10 (transplant) |
| Cabbage | Nov 23–Dec 7 | Jan 4–18 (transplant) | Sep 12–Oct 10 (transplant) |
| Cauliflower | Nov 23–Dec 7 | Jan 18–Feb 1 (transplant) | Sep 12–Oct 10 (transplant) |
| Brussels sprouts | Nov 9–23 | Jan 4–18 (transplant) | Aug 29–Sep 19 (transplant) |
| Kohlrabi | Dec 7–21 | Jan 4–18 (transplant) Jan 4–18 (sow outdoors) | Oct 10–24 (sowing) |
| Bok choy / Asian greens | – | Jan 4–18 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Arugula | – | Jan 4–Feb 1 (sow outdoors) | Oct 24–Nov 21 (sowing) |
| Mustard greens | – | Jan 4–25 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Swiss chard | Dec 21–Jan 4 | Jan 18–Feb 8 (transplant) Jan 18–Feb 15 (sow outdoors) | Oct 10–24 (sowing) |
| Beet | – | Jan 4–Feb 1 (sow outdoors) | Oct 10–24 (sowing) |
| Carrot | – | Jan 11–Feb 8 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Radish | – | Dec 28–Feb 8 (sow outdoors) | Nov 7–21 (sowing) |
| Turnip | – | Jan 4–25 (sow outdoors) | Oct 10–24 (sowing) |
| Parsnip | – | Jan 11–Feb 1 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 7–Jan 4 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Onion (bulbing) | Nov 9–23 | Dec 21–Jan 4 (transplant) | – |
| Green onion / scallion | – | Dec 21–Jan 18 (sow outdoors) | Oct 10–24 (sowing) |
| Leek | Nov 9–23 | Jan 4–18 (transplant) | – |
| Garlic | – | – | Nov 7–Dec 5 (sowing) |
| Shallot | – | Dec 21–Jan 4 (transplant) | Nov 7–Dec 5 (sowing) |
| Potato | – | Jan 4–18 (transplant) | Aug 29–Sep 12 (transplant) |
| Sweet potato | – | Feb 22–Mar 8 (transplant) | – |
| Sweet corn | – | Feb 8–22 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 8–22 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Bean, pole | – | Feb 8–22 (sow outdoors) | – |
| Lima bean | – | Feb 15–Mar 1 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 22–Mar 15 (sow outdoors) | – |
| Cucumber | Jan 4–11 | Feb 8–22 (transplant) Feb 8–22 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Summer squash / zucchini | Jan 4–11 | Feb 8–22 (transplant) Feb 8–22 (sow outdoors) | Sep 26–Oct 10 (sowing) |
| Winter squash | Jan 4–11 | Feb 8–22 (transplant) Feb 8–22 (sow outdoors) | – |
| Pumpkin | – | Feb 8–22 (sow outdoors) | – |
| Watermelon | Jan 4–11 | Feb 15–Mar 1 (transplant) Feb 15–Mar 1 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 4–11 | Feb 15–Mar 1 (transplant) Feb 15–Mar 1 (sow outdoors) | – |
| Okra | Dec 21–Jan 4 | Feb 15–Mar 1 (transplant) Feb 15–Mar 1 (sow outdoors) | – |
| Celery | Nov 9–23 | Feb 8–15 (transplant) | – |
| Basil | Dec 21–Jan 4 | Feb 8–22 (transplant) Feb 8–22 (sow outdoors) | – |
| Cilantro | – | Jan 18–Feb 15 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Parsley | Nov 23–Dec 7 | Jan 18–Feb 1 (transplant) Jan 11–Feb 1 (sow outdoors) | – |
| Dill | – | Feb 1–15 (sow outdoors) | Oct 24–Nov 7 (sowing) |
| Sunflower | – | Feb 1–15 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 4–18 (transplant) | – |
| Rhubarb (crowns) | – | Jan 4–18 (transplant) | – |
| Strawberry (plants) | – | Jan 4–18 (transplant) | Oct 10–Nov 7 (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: Scotia, CA (NOAA GHCN-Daily ID USC00048045), elevation 136 ft, 15.3 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Grizzly Creek Sp, CA | 18 mi | Mar 4 | Nov 22 |
| Richardson Gr Sp, CA | 22 mi | Mar 10 | Dec 1 |
| Eureka WFO Woodley Island, CA | 38 mi | Feb 22 | Dec 7 |
The average last-frost dates of these stations span 40 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95545
When is the last frost in 95545?
The average (50% chance) last spring freeze of 32°F for ZIP 95545 is February 1. For a more cautious planting date, use March 8, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95545?
The average first fall freeze is December 19. In 1 year in 10 it comes by November 19.
What hardiness zone is 95545?
ZIP 95545 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 95545 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
95571 Weott 95558 95553 Miranda 95562 Rio Dell 95569 Redcrest 95565 Scotia 95589 Shelter Cove 95560 Redway
Other ZIP codes in Humboldt County
95501 95503 95511 95514 95519 95521 95524 95525 95526 95528 95536 95537 95540 95542 95546 95547 95549 95550 95551 95553 95554 95555 95556 95558 All Humboldt 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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- Weekly yard to-dos
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.