Toponas, CO frost dates
Last spring frostJun 14median date
First fall frostSep 11median date
Growing season89 daysfrost-free
Hardiness zone5aZone 5a
How Toponas compares
- In 8 years out of 10, the last spring frost in Toponas falls between June 1 and June 28, a 27-day window. The first fall frost falls between August 29 and September 23.
- The median last frost is 34 days later than the Colorado median of May 11.
- Its 89-day growing season is longer than 7% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 42 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 222 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | June 1 |
| 50% (median) | June 14 |
| 10% (safe for tender plants) | June 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | August 29 |
| 50% (median) | September 11 |
| 90% (late) | September 23 |
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 Toponas, CO
Toponas, CO frost dates — last frost Jun 14, first frost Sep 11, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 22 to Apr 5Transplant outside: May 17 to May 31
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 28 to Jul 12
Start indoors: Apr 5 to Apr 19Transplant outside: Jun 28 to Jul 12
Start indoors: Apr 19 to May 3Transplant outside: Jun 21 to Jul 5
Start indoors: Apr 19 to May 3Transplant outside: May 24 to Jun 7Sow outdoors: May 17 to Jun 21Plant for fall: Jul 17 to Aug 14
Start indoors: Apr 19 to May 3Transplant outside: May 17 to May 31Sow outdoors: May 17 to May 31Plant for fall: Jul 3 to Jul 24
Start indoors: Apr 19 to May 3Transplant outside: May 31 to Jun 14
Start indoors: Apr 19 to May 3Transplant outside: May 24 to Jun 7
Start indoors: Apr 19 to May 3Transplant outside: May 31 to Jun 14
Start indoors: May 3 to May 17Transplant outside: Jul 5 to Jul 19Sow outdoors: Jul 5 to Jul 19
Start indoors: May 3 to May 17Transplant outside: Jun 21 to Jul 5
Sow outdoors: May 3 to May 24
Sow outdoors: May 3 to May 24Plant for fall: Jul 17 to Aug 7
Sow outdoors: May 10 to Jun 21Plant for fall: Jul 31 to Aug 21
Start indoors: May 17 to May 24Transplant outside: Jun 28 to Jul 5Sow outdoors: Jun 21 to Jul 5
Start indoors: May 17 to May 24Sow outdoors: Jun 21 to Jul 5
Start indoors: May 17 to May 24Sow outdoors: Jun 21 to Jul 5
Start indoors: May 17 to May 24Transplant outside: Jun 28 to Jul 12
Sow outdoors: May 24 to Jun 21
Sow outdoors: May 24 to Jun 21
Sow outdoors: May 24 to Jun 14
Sow outdoors: May 31 to Jun 28
Sow outdoors: May 31 to Jun 21Plant for fall: Jul 17 to Aug 7
Sow outdoors: Jun 21 to Jul 12
Sow outdoors: Jun 21 to Jul 5
Transplant outside: Jun 28 to Jul 19
Plant for fall: Aug 28 to Oct 2
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Toponas, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 22 – Apr 5 | May 17 – May 31 | — | — |
| Peppers | Apr 5 – Apr 19 | Jun 28 – Jul 12 | — | — |
| Eggplant | Apr 5 – Apr 19 | Jun 28 – Jul 12 | — | — |
| Tomatoes | Apr 19 – May 3 | Jun 21 – Jul 5 | — | — |
| Lettuce | Apr 19 – May 3 | May 24 – Jun 7 | May 17 – Jun 21 | Jul 17 – Aug 14 |
| Kale | Apr 19 – May 3 | May 17 – May 31 | May 17 – May 31 | Jul 3 – Jul 24 |
| Broccoli | Apr 19 – May 3 | May 31 – Jun 14 | — | — |
| Cabbage | Apr 19 – May 3 | May 24 – Jun 7 | — | — |
| Cauliflower | Apr 19 – May 3 | May 31 – Jun 14 | — | — |
| Okra | May 3 – May 17 | Jul 5 – Jul 19 | Jul 5 – Jul 19 | — |
| Basil | May 3 – May 17 | Jun 21 – Jul 5 | — | — |
| Peas | — | — | May 3 – May 24 | — |
| Spinach | — | — | May 3 – May 24 | Jul 17 – Aug 7 |
| Radishes | — | — | May 10 – Jun 21 | Jul 31 – Aug 21 |
| Cucumbers | May 17 – May 24 | Jun 28 – Jul 5 | Jun 21 – Jul 5 | — |
| Zucchini & Summer Squash | May 17 – May 24 | — | Jun 21 – Jul 5 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 89 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 17 – May 24 | — | Jun 21 – Jul 5 | — |
| Melons & Watermelon Warning: Your frost-free season is about 89 days, which is tight for melons & watermelon (85+ days). Choose early varieties and use transplants or row covers. | May 17 – May 24 | Jun 28 – Jul 12 | — | — |
| Carrots | — | — | May 24 – Jun 21 | — |
| Beets | — | — | May 24 – Jun 21 | — |
| Potatoes | — | — | May 24 – Jun 14 | — |
| Swiss Chard | — | — | May 31 – Jun 28 | — |
| Cilantro | — | — | May 31 – Jun 21 | Jul 17 – Aug 7 |
| Green Beans | — | — | Jun 21 – Jul 12 | — |
| Sweet Corn Warning: Your frost-free season is about 89 days, which is tight for sweet corn (80+ days). Choose early varieties and use transplants or row covers. | — | — | Jun 21 – Jul 5 | — |
| Sweet Potatoes Warning: Your frost-free season is about 89 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 28 – Jul 19 | — | — |
| Garlic | — | — | — | Aug 28 – Oct 2 |
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 Yampa, CO weather station, 14 km away (elevation 7,858 ft (2,395 m)).
Frost dates near Toponas
- Yampa Jun 14 · Sep 11
- Mc Coy Jun 14 · Sep 11
- Phippsburg Jun 14 · Sep 11
- Burns Jun 14 · Sep 11
- Bond Jun 6 · Sep 14
- Oak Creek Jun 14 · Sep 11
- Kremmling Jun 14 · Sep 5
- Wolcott Jun 21 · Sep 7
- Gypsum May 1 · Oct 14
- Eagle frost any month
Frequently asked questions
When is the last frost in Toponas, CO?
The median last spring frost in Toponas, CO is June 14. There is still about a 10% chance of frost after June 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Toponas, CO?
The median first fall frost is September 11, with about a 10% chance of frost before August 29.
How long is the growing season in Toponas, CO?
About 89 days between the median last spring frost and first fall frost.
What planting zone is Toponas, CO?
Toponas, CO is in USDA hardiness zone 5a.