Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 93668 (Tranquillity, 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, Five Points 5 SSW, CA (22 miles away).
- Average last spring frostFeb 2750% chance of a 32°F freeze after this date
- Average first fall frostNov 2650% chance of a 32°F freeze by this date
- Growing season (frost-free)271 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°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
78°F 55°F or warmer
24-hour average · latest 76°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Monocline Ridge (16 mi), Vallecitos (27 mi), Merced 23 WSW (52 mi).
4-inch depth
77°F 55°F or warmer
24-hour average · latest 79°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Monocline Ridge (16 mi), Vallecitos (27 mi), Merced 23 WSW (52 mi).
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 93668 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 77°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): not yet. Apply as soil cools toward 70°F (typically 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 Apr 14 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 transplant Oct 1–22
- Spinach: fall sowing Oct 1–22
- Arugula: fall sowing Oct 1–29
- Radish: fall sowing Oct 15–29
- Garlic: fall sowing Oct 15–Nov 12
- Shallot: fall sowing Oct 15–Nov 12
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 26: 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 21 |
| 50% (the "average" last frost) | Feb 27 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 13 |
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 8 |
| 50% (the "average" first frost) | Nov 26 |
| 90% (late: most years have frozen by now) | Dec 16 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 3 | Nov 12 |
| 32°F (freeze) | Feb 27 | Nov 26 |
| 28°F (hard freeze) | Jan 21 | Dec 9 |
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 93668
Dates count from your average last spring frost (Feb 27) and first fall frost (Nov 26). 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 | Jan 2–16 | Mar 6–20 (transplant) | Jul 30–Aug 27 (transplant) |
| Pepper (sweet and hot) | Dec 19–Jan 2 | Mar 13–27 (transplant) | Aug 6–27 (transplant) |
| Eggplant | Dec 19–Jan 2 | Mar 13–27 (transplant) | Aug 6–27 (transplant) |
| Tomatillo | Jan 2–16 | Mar 6–20 (transplant) | – |
| Lettuce | Jan 2–16 | Feb 6–27 (transplant) Jan 30–Mar 13 (sow outdoors) | Oct 1–22 (transplant) Sep 17–Oct 15 (sowing) |
| Spinach | – | Jan 16–Feb 6 (sow outdoors) | Oct 1–22 (sowing) |
| Kale | Jan 2–16 | Jan 30–Feb 13 (transplant) Jan 30–Feb 13 (sow outdoors) | Sep 3–Oct 1 (transplant) Aug 20–Sep 17 (sowing) |
| Collards | Jan 2–16 | Jan 30–Feb 27 (transplant) Jan 30–Feb 27 (sow outdoors) | Sep 3–Oct 1 (transplant) Aug 20–Sep 17 (sowing) |
| Broccoli | Dec 19–Jan 2 | Jan 30–Feb 13 (transplant) | Aug 20–Sep 17 (transplant) |
| Cabbage | Dec 19–Jan 2 | Jan 30–Feb 13 (transplant) | Aug 20–Sep 17 (transplant) |
| Cauliflower | Dec 19–Jan 2 | Feb 13–27 (transplant) | Aug 20–Sep 17 (transplant) |
| Brussels sprouts | Dec 5–19 | Jan 30–Feb 13 (transplant) | Aug 6–27 (transplant) |
| Kohlrabi | Jan 2–16 | Jan 30–Feb 13 (transplant) Jan 30–Feb 13 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Bok choy / Asian greens | – | Jan 30–Feb 13 (sow outdoors) | Oct 1–15 (sowing) |
| Arugula | – | Jan 30–Feb 27 (sow outdoors) | Oct 1–29 (sowing) |
| Mustard greens | – | Jan 30–Feb 20 (sow outdoors) | Oct 1–15 (sowing) |
| Swiss chard | Jan 16–30 | Feb 13–Mar 6 (transplant) Feb 13–Mar 13 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Beet | – | Jan 30–Feb 27 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Carrot | – | Feb 6–Mar 6 (sow outdoors) | Sep 3–17 (sowing) |
| Radish | – | Jan 23–Mar 6 (sow outdoors) | Oct 15–29 (sowing) |
| Turnip | – | Jan 30–Feb 20 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Parsnip | – | Feb 6–27 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 2–30 (sow outdoors) | Sep 3–17 (sowing) |
| Onion (bulbing) | Dec 5–19 | Jan 16–30 (transplant) | – |
| Green onion / scallion | – | Jan 16–Feb 13 (sow outdoors) | Sep 17–Oct 1 (sowing) |
| Leek | Dec 5–19 | Jan 30–Feb 13 (transplant) | – |
| Garlic | – | – | Oct 15–Nov 12 (sowing) |
| Shallot | – | Jan 16–30 (transplant) | Oct 15–Nov 12 (sowing) |
| Potato | – | Jan 30–Feb 13 (transplant) | Aug 6–20 (transplant) |
| Sweet potato | – | Mar 20–Apr 3 (transplant) | – |
| Sweet corn | – | Mar 6–20 (sow outdoors) | – |
| Bean, bush (snap) | – | Mar 6–20 (sow outdoors) | Sep 3–17 (sowing) |
| Bean, pole | – | Mar 6–20 (sow outdoors) | – |
| Lima bean | – | Mar 13–27 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 20–Apr 10 (sow outdoors) | – |
| Cucumber | Jan 30–Feb 6 | Mar 6–20 (transplant) Mar 6–20 (sow outdoors) | Sep 3–17 (sowing) |
| Summer squash / zucchini | Jan 30–Feb 6 | Mar 6–20 (transplant) Mar 6–20 (sow outdoors) | Sep 3–17 (sowing) |
| Winter squash | Jan 30–Feb 6 | Mar 6–20 (transplant) Mar 6–20 (sow outdoors) | – |
| Pumpkin | – | Mar 6–20 (sow outdoors) | – |
| Watermelon | Jan 30–Feb 6 | Mar 13–27 (transplant) Mar 13–27 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 30–Feb 6 | Mar 13–27 (transplant) Mar 13–27 (sow outdoors) | – |
| Okra | Jan 16–30 | Mar 13–27 (transplant) Mar 13–27 (sow outdoors) | – |
| Celery | Dec 5–19 | Mar 6–13 (transplant) | – |
| Basil | Jan 16–30 | Mar 6–20 (transplant) Mar 6–20 (sow outdoors) | – |
| Cilantro | – | Feb 13–Mar 13 (sow outdoors) | Oct 1–15 (sowing) |
| Parsley | Dec 19–Jan 2 | Feb 13–27 (transplant) Feb 6–27 (sow outdoors) | – |
| Dill | – | Feb 27–Mar 13 (sow outdoors) | Oct 1–15 (sowing) |
| Sunflower | – | Feb 27–Mar 13 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 30–Feb 13 (transplant) | – |
| Rhubarb (crowns) | – | Jan 30–Feb 13 (transplant) | – |
| Strawberry (plants) | – | Jan 30–Feb 13 (transplant) | Sep 17–Oct 15 (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: Five Points 5 SSW, CA (NOAA GHCN-Daily ID USC00043083), elevation 285 ft, 21.6 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Madera, CA | 25 mi | Feb 18 | Nov 27 |
| Madera Muni AP, CA | 25 mi | Feb 12 | Nov 30 |
| Lemoore Reeves NAS, CA | 29 mi | Feb 24 | Nov 22 |
The average last-frost dates of these stations span 15 days, a rough guide to local variation. See data sources & methods.
Frost questions for 93668
When is the last frost in 93668?
The average (50% chance) last spring freeze of 32°F for ZIP 93668 is February 27. For a more cautious planting date, use April 13, when only 1 year in 10 still sees a later freeze.
When is the first frost in 93668?
The average first fall freeze is November 26. In 1 year in 10 it comes by November 8.
What hardiness zone is 93668?
ZIP 93668 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 93668 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
93660 San Joaquin 93640 Mendota 93630 Kerman 93608 Cantua Creek 93627 93606 Biola 93637 Madera 93622 Firebaugh
Other ZIP codes in Fresno County
93210 93234 93242 93602 93605 93606 93608 93609 93611 93612 93616 93619 93621 93622 93624 93625 93627 93628 93630 93634 93640 93641 93648 93650 All Fresno County frost dates · California frost dates
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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.