Mancos, CO frost dates
Last spring frostJun 4median date
First fall frostSep 24median date
Growing season112 daysfrost-free
Hardiness zone6aZone 6a
How Mancos compares
- In 8 years out of 10, the last spring frost in Mancos falls between May 20 and June 19, a 30-day window. The first fall frost falls between September 9 and October 4.
- The median last frost is 24 days later than the Colorado median of May 11.
- Its 112-day growing season is longer than 19% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 36 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 194 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 20 |
| 50% (median) | June 4 |
| 10% (safe for tender plants) | June 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 9 |
| 50% (median) | September 24 |
| 90% (late) | October 4 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Mancos, CO
Mancos, CO frost dates — last frost Jun 4, first frost Sep 24, zone 6a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 12 to Mar 26Transplant outside: May 7 to May 21
Start indoors: Mar 26 to Apr 9Transplant outside: Jun 18 to Jul 2
Start indoors: Mar 26 to Apr 9Transplant outside: Jun 18 to Jul 2
Start indoors: Apr 9 to Apr 23Transplant outside: Jun 11 to Jun 25
Start indoors: Apr 9 to Apr 23Transplant outside: May 14 to May 28Sow outdoors: May 7 to Jun 11Plant for fall: Jul 30 to Aug 27
Start indoors: Apr 9 to Apr 23Transplant outside: May 7 to May 21Sow outdoors: May 7 to May 21Plant for fall: Jul 16 to Aug 6
Start indoors: Apr 9 to Apr 23Transplant outside: May 21 to Jun 4
Start indoors: Apr 9 to Apr 23Transplant outside: May 14 to May 28
Start indoors: Apr 9 to Apr 23Transplant outside: May 21 to Jun 4
Start indoors: Apr 23 to May 7Transplant outside: Jun 25 to Jul 9Sow outdoors: Jun 25 to Jul 9
Start indoors: Apr 23 to May 7Transplant outside: Jun 11 to Jun 25
Sow outdoors: Apr 23 to May 14Plant for fall: Jul 2 to Jul 23
Sow outdoors: Apr 23 to May 14Plant for fall: Jul 30 to Aug 20
Sow outdoors: Apr 30 to Jun 11Plant for fall: Aug 13 to Sep 3
Start indoors: May 7 to May 14Transplant outside: Jun 18 to Jun 25Sow outdoors: Jun 11 to Jun 25
Start indoors: May 7 to May 14Sow outdoors: Jun 11 to Jun 25Plant for fall: Jul 16 to Jul 30
Start indoors: May 7 to May 14Sow outdoors: Jun 11 to Jun 25
Start indoors: May 7 to May 14Transplant outside: Jun 18 to Jul 2
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 2 to Jul 16
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 16 to Jul 30
Sow outdoors: May 14 to Jun 4
Sow outdoors: May 21 to Jun 18Plant for fall: Jul 16 to Jul 30
Sow outdoors: May 21 to Jun 11Plant for fall: Jul 30 to Aug 20
Sow outdoors: Jun 11 to Jul 2
Sow outdoors: Jun 11 to Jun 25
Transplant outside: Jun 18 to Jul 9
Plant for fall: Sep 10 to Oct 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Mancos, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 12 – Mar 26 | May 7 – May 21 | — | — |
| Peppers | Mar 26 – Apr 9 | Jun 18 – Jul 2 | — | — |
| Eggplant | Mar 26 – Apr 9 | Jun 18 – Jul 2 | — | — |
| Tomatoes | Apr 9 – Apr 23 | Jun 11 – Jun 25 | — | — |
| Lettuce | Apr 9 – Apr 23 | May 14 – May 28 | May 7 – Jun 11 | Jul 30 – Aug 27 |
| Kale | Apr 9 – Apr 23 | May 7 – May 21 | May 7 – May 21 | Jul 16 – Aug 6 |
| Broccoli | Apr 9 – Apr 23 | May 21 – Jun 4 | — | — |
| Cabbage | Apr 9 – Apr 23 | May 14 – May 28 | — | — |
| Cauliflower | Apr 9 – Apr 23 | May 21 – Jun 4 | — | — |
| Okra | Apr 23 – May 7 | Jun 25 – Jul 9 | Jun 25 – Jul 9 | — |
| Basil | Apr 23 – May 7 | Jun 11 – Jun 25 | — | — |
| Peas | — | — | Apr 23 – May 14 | Jul 2 – Jul 23 |
| Spinach | — | — | Apr 23 – May 14 | Jul 30 – Aug 20 |
| Radishes | — | — | Apr 30 – Jun 11 | Aug 13 – Sep 3 |
| Cucumbers | May 7 – May 14 | Jun 18 – Jun 25 | Jun 11 – Jun 25 | — |
| Zucchini & Summer Squash | May 7 – May 14 | — | Jun 11 – Jun 25 | Jul 16 – Jul 30 |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 112 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 7 – May 14 | — | Jun 11 – Jun 25 | — |
| Melons & Watermelon | May 7 – May 14 | Jun 18 – Jul 2 | — | — |
| Carrots | — | — | May 14 – Jun 11 | Jul 2 – Jul 16 |
| Beets | — | — | May 14 – Jun 11 | Jul 16 – Jul 30 |
| Potatoes | — | — | May 14 – Jun 4 | — |
| Swiss Chard | — | — | May 21 – Jun 18 | Jul 16 – Jul 30 |
| Cilantro | — | — | May 21 – Jun 11 | Jul 30 – Aug 20 |
| Green Beans | — | — | Jun 11 – Jul 2 | — |
| Sweet Corn | — | — | Jun 11 – Jun 25 | — |
| Sweet Potatoes Warning: Your frost-free season is about 112 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 18 – Jul 9 | — | — |
| Garlic | — | — | — | Sep 10 – Oct 15 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Mancos 1sw, CO weather station, 2 km away (elevation 6,896 ft (2,102 m)).
Frost dates near Mancos
- Dolores May 12 · Oct 7
- Mesa Verde National Park May 6 · Oct 14
- Cortez May 12 · Oct 7
- Hesperus Jun 1 · Sep 27
- Marvel Jun 1 · Sep 27
- Lewis May 15 · Oct 8
- Durango May 21 · Oct 2
- Towaoc May 27 · Sep 28
- Yellow Jacket May 17 · Oct 9
- Rico frost any month
Frequently asked questions
When is the last frost in Mancos, CO?
The median last spring frost in Mancos, CO is June 4. There is still about a 10% chance of frost after June 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Mancos, CO?
The median first fall frost is September 24, with about a 10% chance of frost before September 9.
How long is the growing season in Mancos, CO?
About 112 days between the median last spring frost and first fall frost.
What planting zone is Mancos, CO?
Mancos, CO is in USDA hardiness zone 6a.