Frost dates for ZIP 99760 (Nenana, AK)
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, Nenana Muni AP, AK (9 miles away).
- Average last spring frostMay 1550% chance of a 32°F freeze after this date
- Average first fall frostSep 1150% chance of a 32°F freeze by this date
- Growing season (frost-free)117 daysmedian, 32°F threshold
- USDA hardiness zone2a-50 to -45°F avg. coldest night
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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 99760 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 mid-April to early May.
Fertilizer window
Lawn region: North (cool-season). Timing only; always follow the product label.
- Kentucky bluegrass (cool-season): Early fall: Around Labor Day (late August–September); Late fall: Late October–November, before the ground freezes; Late spring: Optional around Memorial Day. Avoid: Early-spring and midsummer feeding (pushes top growth, favors crabgrass).
Plant now
No vegetable planting windows are open this week.
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) | May 3 |
| 50% (the "average" last frost) | May 15 |
| 10% (cautious: only 1 year in 10 freezes later) | May 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) | Aug 27 |
| 50% (the "average" first frost) | Sep 11 |
| 90% (late: most years have frozen by now) | Sep 24 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 26 | Aug 30 |
| 32°F (freeze) | May 15 | Sep 11 |
| 28°F (hard freeze) | May 5 | Sep 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 99760
Dates count from your average last spring frost (May 15) and first fall frost (Sep 11). 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 | Mar 20–Apr 3 | May 22–Jun 5 (transplant) | – |
| Pepper (sweet and hot) | Mar 6–20 | May 29–Jun 12 (transplant) | – |
| Eggplant | Mar 6–20 | May 29–Jun 12 (transplant) | – |
| Tomatillo | Mar 20–Apr 3 | May 22–Jun 5 (transplant) | – |
| Lettuce | Mar 20–Apr 3 | Apr 24–May 15 (transplant) Apr 17–May 29 (sow outdoors) | Jul 17–Aug 7 (transplant) Jul 3–31 (sowing) |
| Spinach | – | Apr 3–24 (sow outdoors) | Jul 17–Aug 7 (sowing) |
| Kale | Mar 20–Apr 3 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | Jun 19–Jul 17 (transplant) Jun 5–Jul 3 (sowing) |
| Collards | Mar 20–Apr 3 | Apr 17–May 15 (transplant) Apr 17–May 15 (sow outdoors) | Jun 19–Jul 17 (transplant) Jun 5–Jul 3 (sowing) |
| Broccoli | Mar 6–20 | Apr 17–May 1 (transplant) | Jun 5–Jul 3 (transplant) |
| Cabbage | Mar 6–20 | Apr 17–May 1 (transplant) | Jun 5–Jul 3 (transplant) |
| Cauliflower | Mar 6–20 | May 1–15 (transplant) | Jun 5–Jul 3 (transplant) |
| Brussels sprouts | Feb 20–Mar 6 | Apr 17–May 1 (transplant) | May 22–Jun 12 (transplant) |
| Kohlrabi | Mar 20–Apr 3 | Apr 17–May 1 (transplant) Apr 17–May 1 (sow outdoors) | Jul 3–17 (sowing) |
| Bok choy / Asian greens | – | Apr 17–May 1 (sow outdoors) | Jul 17–31 (sowing) |
| Arugula | – | Apr 17–May 15 (sow outdoors) | Jul 17–Aug 14 (sowing) |
| Mustard greens | – | Apr 17–May 8 (sow outdoors) | Jul 17–31 (sowing) |
| Swiss chard | Apr 3–17 | May 1–22 (transplant) May 1–29 (sow outdoors) | Jul 3–17 (sowing) |
| Beet | – | Apr 17–May 15 (sow outdoors) | Jul 3–17 (sowing) |
| Carrot | – | Apr 24–May 22 (sow outdoors) | Jun 19–Jul 3 (sowing) |
| Radish | – | Apr 10–May 22 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Turnip | – | Apr 17–May 8 (sow outdoors) | Jul 3–17 (sowing) |
| Parsnip | – | Apr 24–May 15 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 20–Apr 17 (sow outdoors) | Jun 19–Jul 3 (sowing) |
| Onion (bulbing) | Feb 20–Mar 6 | Apr 3–17 (transplant) | – |
| Green onion / scallion | – | Apr 3–May 1 (sow outdoors) | Jul 3–17 (sowing) |
| Leek | Feb 20–Mar 6 | Apr 17–May 1 (transplant) | – |
| Garlic | – | – | Jul 31–Aug 28 (sowing) |
| Shallot | – | Apr 3–17 (transplant) | Jul 31–Aug 28 (sowing) |
| Potato | – | Apr 17–May 1 (transplant) | May 22–Jun 5 (transplant) |
| Sweet potato | – | Jun 5–19 (transplant) | – |
| Sweet corn | – | May 22–Jun 5 (sow outdoors) | – |
| Bean, bush (snap) | – | May 22–Jun 5 (sow outdoors) | – |
| Bean, pole | – | May 22–Jun 5 (sow outdoors) | – |
| Lima bean | – | May 29–Jun 12 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Jun 5–26 (sow outdoors) | – |
| Cucumber | Apr 17–24 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Summer squash / zucchini | Apr 17–24 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Winter squash | Apr 17–24 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Pumpkin | – | May 22–Jun 5 (sow outdoors) | – |
| Watermelon | Apr 17–24 | May 29–Jun 12 (transplant) May 29–Jun 12 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 17–24 | May 29–Jun 12 (transplant) May 29–Jun 12 (sow outdoors) | – |
| Okra | Apr 3–17 | May 29–Jun 12 (transplant) May 29–Jun 12 (sow outdoors) | – |
| Celery | Feb 20–Mar 6 | May 22–29 (transplant) | – |
| Basil | Apr 3–17 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Cilantro | – | May 1–29 (sow outdoors) | Jul 17–31 (sowing) |
| Parsley | Mar 6–20 | May 1–15 (transplant) Apr 24–May 15 (sow outdoors) | – |
| Dill | – | May 15–29 (sow outdoors) | Jul 17–31 (sowing) |
| Sunflower | – | May 15–29 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 17–May 1 (transplant) | – |
| Rhubarb (crowns) | – | Apr 17–May 1 (transplant) | – |
| Strawberry (plants) | – | Apr 17–May 1 (transplant) | Jul 3–31 (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: Nenana Muni AP, AK (NOAA GHCN-Daily ID USW00026435), elevation 360 ft, 9.4 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Clear Sky, AK | 12 mi | May 24 | Sep 4 |
| Kobe Hill, AK | 18 mi | May 24 | Sep 2 |
| Healy, AK | 38 mi | May 27 | Sep 1 |
The average last-frost dates of these stations span 12 days, a rough guide to local variation. See data sources & methods.
Frost questions for 99760
When is the last frost in 99760?
The average (50% chance) last spring freeze of 32°F for ZIP 99760 is May 15. For a more cautious planting date, use May 29, when only 1 year in 10 still sees a later freeze.
When is the first frost in 99760?
The average first fall freeze is September 11. In 1 year in 10 it comes by August 27.
What hardiness zone is 99760?
ZIP 99760 is in USDA zone 2a (-50 to -45°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 99760 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
99744 Anderson 99704 Anderson 99743 Healy 99709 Goldstream 99725 Ester 99755 Denali Park 99775 College 99758 Minto
Other ZIP codes in Yukon-Koyukuk Census Area
99558 99590 99602 99627 99665 99675 99691 99701 99720 99722 99724 99726 99730 99733 99740 99741 99745 99746 99748 99754 99756 99757 99758 99765 All Yukon-Koyukuk Census Area frost dates · Alaska frost dates
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