Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95674 (Rio Oso, 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, Marysville Yuba Co AP, CA (11 miles away).
- Average last spring frostFeb 1150% chance of a 32°F freeze after this date
- Average first fall frostNov 3050% chance of a 32°F freeze by this date
- Growing season (frost-free)289 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 95674 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 29 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 21–Oct 19
- Lettuce: fall transplant Oct 5–26
- Spinach: fall sowing Oct 5–26
- Bok choy / Asian greens: fall sowing Oct 5–19
- Arugula: fall sowing Oct 5–Nov 2
- Mustard greens: fall sowing Oct 5–19
- Cilantro: fall sowing Oct 5–19
- Dill: fall sowing Oct 5–19
- Strawberry (plants): fall transplant Sep 21–Oct 19
Coming up in the next 3 weeks
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 30: 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) | Jan 6 |
| 50% (the "average" last frost) | Feb 11 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 12 |
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 12 |
| 50% (the "average" first frost) | Nov 30 |
| 90% (late: most years have frozen by now) | Dec 21 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 21 | Nov 14 |
| 32°F (freeze) | Feb 11 | Nov 30 |
| 28°F (hard freeze) | Jan 12 | Dec 13 |
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 95674
Dates count from your average last spring frost (Feb 11) and first fall frost (Nov 30). 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 17–31 | Feb 18–Mar 4 (transplant) | Aug 3–31 (transplant) |
| Pepper (sweet and hot) | Dec 3–17 | Feb 25–Mar 11 (transplant) | Aug 10–31 (transplant) |
| Eggplant | Dec 3–17 | Feb 25–Mar 11 (transplant) | Aug 10–31 (transplant) |
| Tomatillo | Dec 17–31 | Feb 18–Mar 4 (transplant) | – |
| Lettuce | Dec 17–31 | Jan 21–Feb 11 (transplant) Jan 14–Feb 25 (sow outdoors) | Oct 5–26 (transplant) Sep 21–Oct 19 (sowing) |
| Spinach | – | Dec 31–Jan 21 (sow outdoors) | Oct 5–26 (sowing) |
| Kale | Dec 17–31 | Jan 14–28 (transplant) Jan 14–28 (sow outdoors) | Sep 7–Oct 5 (transplant) Aug 24–Sep 21 (sowing) |
| Collards | Dec 17–31 | Jan 14–Feb 11 (transplant) Jan 14–Feb 11 (sow outdoors) | Sep 7–Oct 5 (transplant) Aug 24–Sep 21 (sowing) |
| Broccoli | Dec 3–17 | Jan 14–28 (transplant) | Aug 24–Sep 21 (transplant) |
| Cabbage | Dec 3–17 | Jan 14–28 (transplant) | Aug 24–Sep 21 (transplant) |
| Cauliflower | Dec 3–17 | Jan 28–Feb 11 (transplant) | Aug 24–Sep 21 (transplant) |
| Brussels sprouts | Nov 19–Dec 3 | Jan 14–28 (transplant) | Aug 10–31 (transplant) |
| Kohlrabi | Dec 17–31 | Jan 14–28 (transplant) Jan 14–28 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Bok choy / Asian greens | – | Jan 14–28 (sow outdoors) | Oct 5–19 (sowing) |
| Arugula | – | Jan 14–Feb 11 (sow outdoors) | Oct 5–Nov 2 (sowing) |
| Mustard greens | – | Jan 14–Feb 4 (sow outdoors) | Oct 5–19 (sowing) |
| Swiss chard | Dec 31–Jan 14 | Jan 28–Feb 18 (transplant) Jan 28–Feb 25 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Beet | – | Jan 14–Feb 11 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Carrot | – | Jan 21–Feb 18 (sow outdoors) | Sep 7–21 (sowing) |
| Radish | – | Jan 7–Feb 18 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Turnip | – | Jan 14–Feb 4 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Parsnip | – | Jan 21–Feb 11 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 17–Jan 14 (sow outdoors) | Sep 7–21 (sowing) |
| Onion (bulbing) | Nov 19–Dec 3 | Dec 31–Jan 14 (transplant) | – |
| Green onion / scallion | – | Dec 31–Jan 28 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Leek | Nov 19–Dec 3 | Jan 14–28 (transplant) | – |
| Garlic | – | – | Oct 19–Nov 16 (sowing) |
| Shallot | – | Dec 31–Jan 14 (transplant) | Oct 19–Nov 16 (sowing) |
| Potato | – | Jan 14–28 (transplant) | Aug 10–24 (transplant) |
| Sweet potato | – | Mar 4–18 (transplant) | – |
| Sweet corn | – | Feb 18–Mar 4 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 18–Mar 4 (sow outdoors) | Sep 7–21 (sowing) |
| Bean, pole | – | Feb 18–Mar 4 (sow outdoors) | – |
| Lima bean | – | Feb 25–Mar 11 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 4–25 (sow outdoors) | – |
| Cucumber | Jan 14–21 | Feb 18–Mar 4 (transplant) Feb 18–Mar 4 (sow outdoors) | Sep 7–21 (sowing) |
| Summer squash / zucchini | Jan 14–21 | Feb 18–Mar 4 (transplant) Feb 18–Mar 4 (sow outdoors) | Sep 7–21 (sowing) |
| Winter squash | Jan 14–21 | Feb 18–Mar 4 (transplant) Feb 18–Mar 4 (sow outdoors) | – |
| Pumpkin | – | Feb 18–Mar 4 (sow outdoors) | – |
| Watermelon | Jan 14–21 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 14–21 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | – |
| Okra | Dec 31–Jan 14 | Feb 25–Mar 11 (transplant) Feb 25–Mar 11 (sow outdoors) | – |
| Celery | Nov 19–Dec 3 | Feb 18–25 (transplant) | – |
| Basil | Dec 31–Jan 14 | Feb 18–Mar 4 (transplant) Feb 18–Mar 4 (sow outdoors) | – |
| Cilantro | – | Jan 28–Feb 25 (sow outdoors) | Oct 5–19 (sowing) |
| Parsley | Dec 3–17 | Jan 28–Feb 11 (transplant) Jan 21–Feb 11 (sow outdoors) | – |
| Dill | – | Feb 11–25 (sow outdoors) | Oct 5–19 (sowing) |
| Sunflower | – | Feb 11–25 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 14–28 (transplant) | – |
| Rhubarb (crowns) | – | Jan 14–28 (transplant) | – |
| Strawberry (plants) | – | Jan 14–28 (transplant) | Sep 21–Oct 19 (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: Marysville Yuba Co AP, CA (NOAA GHCN-Daily ID USW00093205), elevation 62 ft, 11.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Marysville, CA | 14 mi | Jan 15 | Dec 12 |
| Sacramento Metro AP, CA | 19 mi | Feb 22 | Nov 24 |
| Auburn, CA | 22 mi | Feb 25 | Dec 5 |
The average last-frost dates of these stations span 41 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95674
When is the last frost in 95674?
The average (50% chance) last spring freeze of 32°F for ZIP 95674 is February 11. For a more cautious planting date, use March 12, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95674?
The average first fall freeze is November 30. In 1 year in 10 it comes by November 12.
What hardiness zone is 95674?
ZIP 95674 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 95674 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
95692 Wheatland 95961 Plumas Lake 95681 Sheridan 95991 Yuba City 95668 95659 East Nicolaus 95648 Lincoln 95903 Beale AFB
Other ZIP codes in Sutter County
95659 95668 95676 95953 95957 95982 95991 95993 All Sutter 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.