Fall in zone 9bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 95920 (Glenn 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, Oroville Muni AP, CA (17 miles away).
- Average last spring frostJan 2950% chance of a 32°F freeze after this date
- Average first fall frostDec 750% chance of a 32°F freeze by this date
- Growing season (frost-free)317 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 95920 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 16 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 28–Oct 26
- Lettuce: fall transplant Oct 12–Nov 2
- Spinach: fall sowing Oct 12–Nov 2
- Bok choy / Asian greens: fall sowing Oct 12–26
- Arugula: fall sowing Oct 12–Nov 9
- Mustard greens: fall sowing Oct 12–26
- Cilantro: fall sowing Oct 12–26
- Dill: fall sowing Oct 12–26
- Strawberry (plants): fall transplant Sep 28–Oct 26
Coming up in the next 3 weeks
- Brussels sprouts: start seeds indoors Nov 6–20
- Radish: fall sowing Oct 26–Nov 9
- Onion (bulbing): start seeds indoors Nov 6–20
- Leek: start seeds indoors Nov 6–20
- Garlic: fall sowing Oct 26–Nov 23
- Shallot: fall sowing Oct 26–Nov 23
- Celery: start seeds indoors Nov 6–20
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Dec 7: 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 28 (prior Dec) |
| 50% (the "average" last frost) | Jan 29 |
| 10% (cautious: only 1 year in 10 freezes later) | Feb 28 |
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 20 |
| 50% (the "average" first frost) | Dec 7 |
| 90% (late: most years have frozen by now) | Jan 6 (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 6 | Nov 24 |
| 32°F (freeze) | Jan 29 | Dec 7 |
| 28°F (hard freeze) | Jan 9 | Dec 27 |
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 95920
Dates count from your average last spring frost (Jan 29) and first fall frost (Dec 7). 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 4–18 | Feb 5–19 (transplant) | Aug 10–Sep 7 (transplant) |
| Pepper (sweet and hot) | Nov 20–Dec 4 | Feb 12–26 (transplant) | Aug 17–Sep 7 (transplant) |
| Eggplant | Nov 20–Dec 4 | Feb 12–26 (transplant) | Aug 17–Sep 7 (transplant) |
| Tomatillo | Dec 4–18 | Feb 5–19 (transplant) | – |
| Lettuce | Dec 4–18 | Jan 8–29 (transplant) Jan 1–Feb 12 (sow outdoors) | Oct 12–Nov 2 (transplant) Sep 28–Oct 26 (sowing) |
| Spinach | – | Dec 18–Jan 8 (sow outdoors) | Oct 12–Nov 2 (sowing) |
| Kale | Dec 4–18 | Jan 1–15 (transplant) Jan 1–15 (sow outdoors) | Sep 14–Oct 12 (transplant) Aug 31–Sep 28 (sowing) |
| Collards | Dec 4–18 | Jan 1–29 (transplant) Jan 1–29 (sow outdoors) | Sep 14–Oct 12 (transplant) Aug 31–Sep 28 (sowing) |
| Broccoli | Nov 20–Dec 4 | Jan 1–15 (transplant) | Aug 31–Sep 28 (transplant) |
| Cabbage | Nov 20–Dec 4 | Jan 1–15 (transplant) | Aug 31–Sep 28 (transplant) |
| Cauliflower | Nov 20–Dec 4 | Jan 15–29 (transplant) | Aug 31–Sep 28 (transplant) |
| Brussels sprouts | Nov 6–20 | Jan 1–15 (transplant) | Aug 17–Sep 7 (transplant) |
| Kohlrabi | Dec 4–18 | Jan 1–15 (transplant) Jan 1–15 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Bok choy / Asian greens | – | Jan 1–15 (sow outdoors) | Oct 12–26 (sowing) |
| Arugula | – | Jan 1–29 (sow outdoors) | Oct 12–Nov 9 (sowing) |
| Mustard greens | – | Jan 1–22 (sow outdoors) | Oct 12–26 (sowing) |
| Swiss chard | Dec 18–Jan 1 | Jan 15–Feb 5 (transplant) Jan 15–Feb 12 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Beet | – | Jan 1–29 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Carrot | – | Jan 8–Feb 5 (sow outdoors) | Sep 14–28 (sowing) |
| Radish | – | Dec 25–Feb 5 (sow outdoors) | Oct 26–Nov 9 (sowing) |
| Turnip | – | Jan 1–22 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Parsnip | – | Jan 8–29 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 4–Jan 1 (sow outdoors) | Sep 14–28 (sowing) |
| Onion (bulbing) | Nov 6–20 | Dec 18–Jan 1 (transplant) | – |
| Green onion / scallion | – | Dec 18–Jan 15 (sow outdoors) | Sep 28–Oct 12 (sowing) |
| Leek | Nov 6–20 | Jan 1–15 (transplant) | – |
| Garlic | – | – | Oct 26–Nov 23 (sowing) |
| Shallot | – | Dec 18–Jan 1 (transplant) | Oct 26–Nov 23 (sowing) |
| Potato | – | Jan 1–15 (transplant) | Aug 17–31 (transplant) |
| Sweet potato | – | Feb 19–Mar 5 (transplant) | – |
| Sweet corn | – | Feb 5–19 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 5–19 (sow outdoors) | Sep 14–28 (sowing) |
| Bean, pole | – | Feb 5–19 (sow outdoors) | – |
| Lima bean | – | Feb 12–26 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Feb 19–Mar 12 (sow outdoors) | – |
| Cucumber | Jan 1–8 | Feb 5–19 (transplant) Feb 5–19 (sow outdoors) | Sep 14–28 (sowing) |
| Summer squash / zucchini | Jan 1–8 | Feb 5–19 (transplant) Feb 5–19 (sow outdoors) | Sep 14–28 (sowing) |
| Winter squash | Jan 1–8 | Feb 5–19 (transplant) Feb 5–19 (sow outdoors) | – |
| Pumpkin | – | Feb 5–19 (sow outdoors) | – |
| Watermelon | Jan 1–8 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 1–8 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | – |
| Okra | Dec 18–Jan 1 | Feb 12–26 (transplant) Feb 12–26 (sow outdoors) | – |
| Celery | Nov 6–20 | Feb 5–12 (transplant) | – |
| Basil | Dec 18–Jan 1 | Feb 5–19 (transplant) Feb 5–19 (sow outdoors) | – |
| Cilantro | – | Jan 15–Feb 12 (sow outdoors) | Oct 12–26 (sowing) |
| Parsley | Nov 20–Dec 4 | Jan 15–29 (transplant) Jan 8–29 (sow outdoors) | – |
| Dill | – | Jan 29–Feb 12 (sow outdoors) | Oct 12–26 (sowing) |
| Sunflower | – | Jan 29–Feb 12 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 1–15 (transplant) | – |
| Rhubarb (crowns) | – | Jan 1–15 (transplant) | – |
| Strawberry (plants) | – | Jan 1–15 (transplant) | Sep 28–Oct 26 (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: Oroville Muni AP, CA (NOAA GHCN-Daily ID USW00093210), elevation 190 ft, 17.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Chico Univ Farm, CA | 18 mi | Mar 4 | Nov 17 |
| Colusa 2 SSW, CA | 19 mi | Feb 14 | Dec 1 |
| Willows 6 W, CA | 20 mi | Feb 21 | Dec 6 |
The average last-frost dates of these stations span 37 days, a rough guide to local variation. See data sources & methods.
Frost questions for 95920
When is the last frost in 95920?
The average (50% chance) last spring freeze of 32°F for ZIP 95920 is January 29. For a more cautious planting date, use February 28, when only 1 year in 10 still sees a later freeze.
When is the first frost in 95920?
The average first fall freeze is December 7. In 1 year in 10 it comes by November 20.
What hardiness zone is 95920?
ZIP 95920 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 95920 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
95970 Princeton 95917 Biggs 95943 95974 Richvale 95958 Durham 95948 Gridley 95938 Durham 95932 Colusa
Other ZIP codes in Glenn County
95913 95939 95943 95951 95963 95988 All Glenn County frost dates · California frost dates
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- 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.