Frost dates for ZIP 80127 (Dakota Ridge, CO)
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, Kassler, CO (5 miles away).
- Average last spring frostMay 850% chance of a 32°F freeze after this date
- Average first fall frostOct 350% chance of a 32°F freeze by this date
- Growing season (frost-free)147 daysmedian, 32°F threshold
- USDA hardiness zone5b-15 to -10°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
41°F Below 50°F
24-hour average · latest 44°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Boulder 14 W (40 mi).
4-inch depth
42°F Below 50°F
24-hour average · latest 45°F, as of Oct 17, 9:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Boulder 14 W (40 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 80127 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 42°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent window is mostly past. Next: spring, when soil reaches 50°F (typically mid-April to mid-May).
Fertilizer window
Lawn region: Mountain West and High Plains. 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) | Apr 27 |
| 50% (the "average" last frost) | May 8 |
| 10% (cautious: only 1 year in 10 freezes later) | May 22 |
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) | Sep 21 |
| 50% (the "average" first frost) | Oct 3 |
| 90% (late: most years have frozen by now) | Oct 17 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 19 | Sep 27 |
| 32°F (freeze) | May 8 | Oct 3 |
| 28°F (hard freeze) | Apr 29 | Oct 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 80127
Dates count from your average last spring frost (May 8) and first fall frost (Oct 3). 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 13–27 | May 15–29 (transplant) | – |
| Pepper (sweet and hot) | Feb 27–Mar 13 | May 22–Jun 5 (transplant) | – |
| Eggplant | Feb 27–Mar 13 | May 22–Jun 5 (transplant) | – |
| Tomatillo | Mar 13–27 | May 15–29 (transplant) | – |
| Lettuce | Mar 13–27 | Apr 17–May 8 (transplant) Apr 10–May 22 (sow outdoors) | Aug 8–29 (transplant) Jul 25–Aug 22 (sowing) |
| Spinach | – | Mar 27–Apr 17 (sow outdoors) | Aug 8–29 (sowing) |
| Kale | Mar 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | Jul 11–Aug 8 (transplant) Jun 27–Jul 25 (sowing) |
| Collards | Mar 13–27 | Apr 10–May 8 (transplant) Apr 10–May 8 (sow outdoors) | Jul 11–Aug 8 (transplant) Jun 27–Jul 25 (sowing) |
| Broccoli | Feb 27–Mar 13 | Apr 10–24 (transplant) | Jun 27–Jul 25 (transplant) |
| Cabbage | Feb 27–Mar 13 | Apr 10–24 (transplant) | Jun 27–Jul 25 (transplant) |
| Cauliflower | Feb 27–Mar 13 | Apr 24–May 8 (transplant) | Jun 27–Jul 25 (transplant) |
| Brussels sprouts | Feb 13–27 | Apr 10–24 (transplant) | Jun 13–Jul 4 (transplant) |
| Kohlrabi | Mar 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Bok choy / Asian greens | – | Apr 10–24 (sow outdoors) | Aug 8–22 (sowing) |
| Arugula | – | Apr 10–May 8 (sow outdoors) | Aug 8–Sep 5 (sowing) |
| Mustard greens | – | Apr 10–May 1 (sow outdoors) | Aug 8–22 (sowing) |
| Swiss chard | Mar 27–Apr 10 | Apr 24–May 15 (transplant) Apr 24–May 22 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Beet | – | Apr 10–May 8 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Carrot | – | Apr 17–May 15 (sow outdoors) | Jul 11–25 (sowing) |
| Radish | – | Apr 3–May 15 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Turnip | – | Apr 10–May 1 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Parsnip | – | Apr 17–May 8 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Mar 13–Apr 10 (sow outdoors) | Jul 11–25 (sowing) |
| Onion (bulbing) | Feb 13–27 | Mar 27–Apr 10 (transplant) | – |
| Green onion / scallion | – | Mar 27–Apr 24 (sow outdoors) | Jul 25–Aug 8 (sowing) |
| Leek | Feb 13–27 | Apr 10–24 (transplant) | – |
| Garlic | – | – | Aug 22–Sep 19 (sowing) |
| Shallot | – | Mar 27–Apr 10 (transplant) | Aug 22–Sep 19 (sowing) |
| Potato | – | Apr 10–24 (transplant) | Jun 13–27 (transplant) |
| Sweet potato | – | May 29–Jun 12 (transplant) | – |
| Sweet corn | – | May 15–29 (sow outdoors) | – |
| Bean, bush (snap) | – | May 15–29 (sow outdoors) | – |
| Bean, pole | – | May 15–29 (sow outdoors) | – |
| Lima bean | – | May 22–Jun 5 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 29–Jun 19 (sow outdoors) | – |
| Cucumber | Apr 10–17 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Summer squash / zucchini | Apr 10–17 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Winter squash | Apr 10–17 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Pumpkin | – | May 15–29 (sow outdoors) | – |
| Watermelon | Apr 10–17 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Cantaloupe / muskmelon | Apr 10–17 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Okra | Mar 27–Apr 10 | May 22–Jun 5 (transplant) May 22–Jun 5 (sow outdoors) | – |
| Celery | Feb 13–27 | May 15–22 (transplant) | – |
| Basil | Mar 27–Apr 10 | May 15–29 (transplant) May 15–29 (sow outdoors) | – |
| Cilantro | – | Apr 24–May 22 (sow outdoors) | Aug 8–22 (sowing) |
| Parsley | Feb 27–Mar 13 | Apr 24–May 8 (transplant) Apr 17–May 8 (sow outdoors) | – |
| Dill | – | May 8–22 (sow outdoors) | Aug 8–22 (sowing) |
| Sunflower | – | May 8–22 (sow outdoors) | – |
| Asparagus (crowns) | – | Apr 10–24 (transplant) | – |
| Rhubarb (crowns) | – | Apr 10–24 (transplant) | – |
| Strawberry (plants) | – | Apr 10–24 (transplant) | Jul 25–Aug 22 (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.
Plants that do well here
Colorado has a university or garden plant program: Plant Select®. Plant frost-tender annuals after May 8 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Kassler, CO (NOAA GHCN-Daily ID USC00054452), elevation 5,587 ft, 4.7 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Strontia Springs Dam, CO | 7 mi | May 16 | Sep 29 |
| Marston Fltr Plt, CO | 8 mi | May 2 | Oct 11 |
| Roxborough Sp, CO | 9 mi | May 16 | Oct 1 |
The average last-frost dates of these stations span 14 days, a rough guide to local variation. See data sources & methods.
Frost questions for 80127
When is the last frost in 80127?
The average (50% chance) last spring freeze of 32°F for ZIP 80127 is May 8. For a more cautious planting date, use May 22, when only 1 year in 10 still sees a later freeze.
When is the first frost in 80127?
The average first fall freeze is October 3. In 1 year in 10 it comes by September 21.
What hardiness zone is 80127?
ZIP 80127 is in USDA zone 5b (-15 to -10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 80127 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
80128 Columbine 80465 Morrison 80125 Roxborough Park 80433 Aspen Park 80123 Columbine 80454 Indian Hills 80129 Highlands Ranch 80235 Denver
Other ZIP codes in Jefferson County
80002 80003 80004 80005 80007 80021 80033 80123 80128 80214 80215 80226 80227 80228 80232 80235 80401 80403 80419 80425 80433 80453 80454 80457 All Jefferson County frost dates · Colorado frost dates
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