Parlin, CO frost dates
Last spring frostJun 21median date
First fall frostSep 5median date
Growing season76 daysfrost-free
Hardiness zone4bZone 4b
How Parlin compares
- In 8 years out of 10, the last spring frost in Parlin falls between June 7 and July 7, a 30-day window. The first fall frost falls between August 21 and September 16.
- The median last frost is 41 days later than the Colorado median of May 11.
- Its 76-day growing season is among the shortest of the 374 Colorado places with a regular frost season.
- The last frost is 44 days later than the zone 4b median of May 8. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4b chart.
- The weather station records an average of 246 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | June 7 |
| 50% (median) | June 21 |
| 10% (safe for tender plants) | July 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 21 |
| 50% (median) | September 5 |
| 90% (late) | September 16 |
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 Parlin, CO
Parlin, CO frost dates — last frost Jun 21, first frost Sep 5, zone 4b. whenisthelastfrost.com
Crop
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Start indoors: Mar 29 to Apr 12Transplant outside: May 24 to Jun 7
Start indoors: Apr 12 to Apr 26Transplant outside: Jul 5 to Jul 19
Start indoors: Apr 12 to Apr 26Transplant outside: Jul 5 to Jul 19
Start indoors: Apr 26 to May 10Transplant outside: Jun 28 to Jul 12
Start indoors: Apr 26 to May 10Transplant outside: May 31 to Jun 14Sow outdoors: May 24 to Jun 28
Start indoors: Apr 26 to May 10Transplant outside: May 24 to Jun 7Sow outdoors: May 24 to Jun 7
Start indoors: Apr 26 to May 10Transplant outside: Jun 7 to Jun 21
Start indoors: Apr 26 to May 10Transplant outside: May 31 to Jun 14
Start indoors: Apr 26 to May 10Transplant outside: Jun 7 to Jun 21
Start indoors: May 10 to May 24Transplant outside: Jul 12 to Jul 26Sow outdoors: Jul 12 to Jul 26
Start indoors: May 10 to May 24Transplant outside: Jun 28 to Jul 12
Sow outdoors: May 10 to May 31
Sow outdoors: May 10 to May 31Plant for fall: Jul 11 to Aug 1
Sow outdoors: May 17 to Jun 28Plant for fall: Jul 25 to Aug 15
Start indoors: May 24 to May 31Transplant outside: Jul 5 to Jul 12Sow outdoors: Jun 28 to Jul 12
Start indoors: May 24 to May 31Sow outdoors: Jun 28 to Jul 12
Start indoors: May 24 to May 31Sow outdoors: Jun 28 to Jul 12
Start indoors: May 24 to May 31Transplant outside: Jul 5 to Jul 19
Sow outdoors: May 31 to Jun 28
Sow outdoors: May 31 to Jun 28
Sow outdoors: May 31 to Jun 21
Sow outdoors: Jun 7 to Jul 5
Sow outdoors: Jun 7 to Jun 28
Sow outdoors: Jun 28 to Jul 19
Sow outdoors: Jun 28 to Jul 12
Transplant outside: Jul 5 to Jul 26
Plant for fall: Aug 22 to Sep 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Parlin, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 29 – Apr 12 | May 24 – Jun 7 | — | — |
| Peppers Warning: Your frost-free season is about 76 days, which is tight for peppers (75+ days). Choose early varieties and use transplants or row covers. | Apr 12 – Apr 26 | Jul 5 – Jul 19 | — | — |
| Eggplant Warning: Your frost-free season is about 76 days, which is tight for eggplant (75+ days). Choose early varieties and use transplants or row covers. | Apr 12 – Apr 26 | Jul 5 – Jul 19 | — | — |
| Tomatoes Warning: Your frost-free season is about 76 days, which is tight for tomatoes (70+ days). Choose early varieties and use transplants or row covers. | Apr 26 – May 10 | Jun 28 – Jul 12 | — | — |
| Lettuce | Apr 26 – May 10 | May 31 – Jun 14 | May 24 – Jun 28 | — |
| Kale | Apr 26 – May 10 | May 24 – Jun 7 | May 24 – Jun 7 | — |
| Broccoli | Apr 26 – May 10 | Jun 7 – Jun 21 | — | — |
| Cabbage | Apr 26 – May 10 | May 31 – Jun 14 | — | — |
| Cauliflower | Apr 26 – May 10 | Jun 7 – Jun 21 | — | — |
| Okra | May 10 – May 24 | Jul 12 – Jul 26 | Jul 12 – Jul 26 | — |
| Basil | May 10 – May 24 | Jun 28 – Jul 12 | — | — |
| Peas | — | — | May 10 – May 31 | — |
| Spinach | — | — | May 10 – May 31 | Jul 11 – Aug 1 |
| Radishes | — | — | May 17 – Jun 28 | Jul 25 – Aug 15 |
| Cucumbers | May 24 – May 31 | Jul 5 – Jul 12 | Jun 28 – Jul 12 | — |
| Zucchini & Summer Squash | May 24 – May 31 | — | Jun 28 – Jul 12 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 76 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 24 – May 31 | — | Jun 28 – Jul 12 | — |
| Melons & Watermelon Warning: Your frost-free season is about 76 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 24 – May 31 | Jul 5 – Jul 19 | — | — |
| Carrots | — | — | May 31 – Jun 28 | — |
| Beets | — | — | May 31 – Jun 28 | — |
| Potatoes | — | — | May 31 – Jun 21 | — |
| Swiss Chard | — | — | Jun 7 – Jul 5 | — |
| Cilantro | — | — | Jun 7 – Jun 28 | — |
| Green Beans | — | — | Jun 28 – Jul 19 | — |
| Sweet Corn Warning: Your frost-free season is about 76 days, which is tight for sweet corn (80+ days). Choose early varieties and use transplants or row covers. | — | — | Jun 28 – Jul 12 | — |
| Sweet Potatoes Warning: Your frost-free season is about 76 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jul 5 – Jul 26 | — | — |
| Garlic | — | — | — | Aug 22 – Sep 26 |
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 Cochetopa Creek, CO weather station, 15 km away (elevation 8,005 ft (2,440 m)).
Frost dates near Parlin
- Ohio City Jun 21 · Sep 5
- Pitkin Jun 20 · Sep 8
- Sargents frost any month
- Gunnison frost any month
- Monarch frost any month
- Almont Jun 20 · Sep 8
- Crested Butte frost any month
- Poncha Springs May 29 · Sep 20
- Nathrop May 27 · Sep 23
- Powderhorn Jun 9 · Sep 16
Frequently asked questions
When is the last frost in Parlin, CO?
The median last spring frost in Parlin, CO is June 21. There is still about a 10% chance of frost after July 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Parlin, CO?
The median first fall frost is September 5, with about a 10% chance of frost before August 21.
How long is the growing season in Parlin, CO?
About 76 days between the median last spring frost and first fall frost.
What planting zone is Parlin, CO?
Parlin, CO is in USDA hardiness zone 4b.