Frost dates for ZIP 95485 (Upper Lake, 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, Potter Valley Powerhouse, CA (15 miles away).
- Average last spring frostApr 850% chance of a 32°F freeze after this date
- Average first fall frostNov 650% chance of a 32°F freeze by this date
- Growing season (frost-free)211 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°F avg. coldest night
Get The Dial for 95485 (Upper Lake)
Frost and freeze alerts from the NWS forecast for 95485, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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.
This week in your yard
As of Oct 17, 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 95485 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 May 24 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
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 6: 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) | Mar 11 |
| 50% (the "average" last frost) | Apr 8 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 29 |
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) | Oct 20 |
| 50% (the "average" first frost) | Nov 6 |
| 90% (late: most years have frozen by now) | Nov 24 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 2 | Oct 21 |
| 32°F (freeze) | Apr 8 | Nov 6 |
| 28°F (hard freeze) | Feb 28 | Nov 22 |
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 95485
Dates count from your average last spring frost (Apr 8) and first fall frost (Nov 6). 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 | Feb 11–25 | Apr 15–29 (transplant) | Jul 10–Aug 7 (transplant) |
| Pepper (sweet and hot) | Jan 28–Feb 11 | Apr 22–May 6 (transplant) | Jul 17–Aug 7 (transplant) |
| Eggplant | Jan 28–Feb 11 | Apr 22–May 6 (transplant) | Jul 17–Aug 7 (transplant) |
| Tomatillo | Feb 11–25 | Apr 15–29 (transplant) | – |
| Lettuce | Feb 11–25 | Mar 18–Apr 8 (transplant) Mar 11–Apr 22 (sow outdoors) | Sep 11–Oct 2 (transplant) Aug 28–Sep 25 (sowing) |
| Spinach | – | Feb 25–Mar 18 (sow outdoors) | Sep 11–Oct 2 (sowing) |
| Kale | Feb 11–25 | Mar 11–25 (transplant) Mar 11–25 (sow outdoors) | Aug 14–Sep 11 (transplant) Jul 31–Aug 28 (sowing) |
| Collards | Feb 11–25 | Mar 11–Apr 8 (transplant) Mar 11–Apr 8 (sow outdoors) | Aug 14–Sep 11 (transplant) Jul 31–Aug 28 (sowing) |
| Broccoli | Jan 28–Feb 11 | Mar 11–25 (transplant) | Jul 31–Aug 28 (transplant) |
| Cabbage | Jan 28–Feb 11 | Mar 11–25 (transplant) | Jul 31–Aug 28 (transplant) |
| Cauliflower | Jan 28–Feb 11 | Mar 25–Apr 8 (transplant) | Jul 31–Aug 28 (transplant) |
| Brussels sprouts | Jan 14–28 | Mar 11–25 (transplant) | Jul 17–Aug 7 (transplant) |
| Kohlrabi | Feb 11–25 | Mar 11–25 (transplant) Mar 11–25 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Bok choy / Asian greens | – | Mar 11–25 (sow outdoors) | Sep 11–25 (sowing) |
| Arugula | – | Mar 11–Apr 8 (sow outdoors) | Sep 11–Oct 9 (sowing) |
| Mustard greens | – | Mar 11–Apr 1 (sow outdoors) | Sep 11–25 (sowing) |
| Swiss chard | Feb 25–Mar 11 | Mar 25–Apr 15 (transplant) Mar 25–Apr 22 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Beet | – | Mar 11–Apr 8 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Carrot | – | Mar 18–Apr 15 (sow outdoors) | Aug 14–28 (sowing) |
| Radish | – | Mar 4–Apr 15 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Turnip | – | Mar 11–Apr 1 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Parsnip | – | Mar 18–Apr 8 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 11–Mar 11 (sow outdoors) | Aug 14–28 (sowing) |
| Onion (bulbing) | Jan 14–28 | Feb 25–Mar 11 (transplant) | – |
| Green onion / scallion | – | Feb 25–Mar 25 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Leek | Jan 14–28 | Mar 11–25 (transplant) | – |
| Garlic | – | – | Sep 25–Oct 23 (sowing) |
| Shallot | – | Feb 25–Mar 11 (transplant) | Sep 25–Oct 23 (sowing) |
| Potato | – | Mar 11–25 (transplant) | Jul 17–31 (transplant) |
| Sweet potato | – | Apr 29–May 13 (transplant) | – |
| Sweet corn | – | Apr 15–29 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 15–29 (sow outdoors) | Aug 14–28 (sowing) |
| Bean, pole | – | Apr 15–29 (sow outdoors) | – |
| Lima bean | – | Apr 22–May 6 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 29–May 20 (sow outdoors) | – |
| Cucumber | Mar 11–18 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | Aug 14–28 (sowing) |
| Summer squash / zucchini | Mar 11–18 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | Aug 14–28 (sowing) |
| Winter squash | Mar 11–18 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | – |
| Pumpkin | – | Apr 15–29 (sow outdoors) | – |
| Watermelon | Mar 11–18 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 11–18 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | – |
| Okra | Feb 25–Mar 11 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | – |
| Celery | Jan 14–28 | Apr 15–22 (transplant) | – |
| Basil | Feb 25–Mar 11 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | – |
| Cilantro | – | Mar 25–Apr 22 (sow outdoors) | Sep 11–25 (sowing) |
| Parsley | Jan 28–Feb 11 | Mar 25–Apr 8 (transplant) Mar 18–Apr 8 (sow outdoors) | – |
| Dill | – | Apr 8–22 (sow outdoors) | Sep 11–25 (sowing) |
| Sunflower | – | Apr 8–22 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 11–25 (transplant) | – |
| Rhubarb (crowns) | – | Mar 11–25 (transplant) | – |
| Strawberry (plants) | – | Mar 11–25 (transplant) | Aug 28–Sep 25 (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: Potter Valley Powerhouse, CA (NOAA GHCN-Daily ID USC00047109), elevation 1,018 ft, 15.2 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Ukiah Muni AP, CA | 16 mi | Mar 5 | Nov 21 |
| Ukiah, CA | 16 mi | Mar 19 | Nov 20 |
| East Park Rsvr, CA | 24 mi | Apr 6 | Nov 10 |
The average last-frost dates of these stations span 34 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95485
When is the last frost in 95485?
The average (50% chance) last spring freeze of 32°F for ZIP 95485 is April 8. For a more cautious planting date, use April 29, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95485?
The average first fall freeze is November 6. In 1 year in 10 it comes by October 20.
What hardiness zone is 95485?
ZIP 95485 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 95485 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
95493 95464 Nice 95458 Lucerne 95453 North Lakeport 95435 95443 95469 Potter Valley 95470 Redwood Valley
Other ZIP codes in Lake County
95422 95423 95426 95435 95443 95451 95453 95457 95458 95461 95464 95467 95493 All Lake County frost dates · California frost dates
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
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.