Colorado City, AZ frost dates
Last spring frostApr 26median date
First fall frostOct 25median date
Growing season182 daysfrost-free
Hardiness zone7bZone 7b
How Colorado City compares
- In 8 years out of 10, the last spring frost in Colorado City falls between April 6 and May 15, a 39-day window. The first fall frost falls between October 11 and November 9.
- The median last frost is 10 days later than the Arizona median of Apr 16.
- Its 182-day growing season is longer than 40% of the 193 Arizona places with a regular frost season (state median 197 days).
- The last frost is 21 days later than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 120 nights a year at or below 32°F.
- Compared with Saint George, UT, 55 km away, the last frost here is 43 days later than there and the growing season is 59 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 6 |
| 50% (median) | April 26 |
| 10% (safe for tender plants) | May 15 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 11 |
| 50% (median) | October 25 |
| 90% (late) | November 9 |
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 Colorado City, AZ
Colorado City, AZ frost dates — last frost Apr 26, first frost Oct 25, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Feb 1 to Feb 15Transplant outside: Mar 29 to Apr 12
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Sow outdoors: Mar 29 to May 3Plant for fall: Aug 30 to Sep 27
Start indoors: Mar 1 to Mar 15Transplant outside: Mar 29 to Apr 12Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 16 to Sep 6
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 19 to Aug 9
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Plant for fall: Jul 19 to Aug 9
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 19 to Aug 9
Start indoors: Mar 15 to Mar 29Transplant outside: May 17 to May 31Sow outdoors: May 17 to May 31
Start indoors: Mar 15 to Mar 29Transplant outside: May 3 to May 17
Sow outdoors: Mar 15 to Apr 5Plant for fall: Aug 2 to Aug 23
Sow outdoors: Mar 15 to Apr 5Plant for fall: Aug 30 to Sep 20
Sow outdoors: Mar 22 to May 3Plant for fall: Sep 13 to Oct 4
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 17Sow outdoors: May 3 to May 17Plant for fall: Aug 9 to Aug 23
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17Plant for fall: Aug 16 to Aug 30
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 2 to Aug 16
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 16 to Aug 30
Sow outdoors: Apr 5 to Apr 26
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 16 to Aug 30
Sow outdoors: Apr 12 to May 3Plant for fall: Aug 30 to Sep 20
Sow outdoors: May 3 to May 24Plant for fall: Aug 9 to Aug 23
Sow outdoors: May 3 to May 17
Transplant outside: May 10 to May 31
Plant for fall: Oct 11 to Nov 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Colorado City, AZ
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 1 – Feb 15 | Mar 29 – Apr 12 | — | — |
| Peppers | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Eggplant | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Tomatoes | Mar 1 – Mar 15 | May 3 – May 17 | — | — |
| Lettuce | Mar 1 – Mar 15 | Apr 5 – Apr 19 | Mar 29 – May 3 | Aug 30 – Sep 27 |
| Kale | Mar 1 – Mar 15 | Mar 29 – Apr 12 | Mar 29 – Apr 12 | Aug 16 – Sep 6 |
| Broccoli | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 19 – Aug 9 |
| Cabbage | Mar 1 – Mar 15 | Apr 5 – Apr 19 | — | Jul 19 – Aug 9 |
| Cauliflower | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 19 – Aug 9 |
| Okra | Mar 15 – Mar 29 | May 17 – May 31 | May 17 – May 31 | — |
| Basil | Mar 15 – Mar 29 | May 3 – May 17 | — | — |
| Peas | — | — | Mar 15 – Apr 5 | Aug 2 – Aug 23 |
| Spinach | — | — | Mar 15 – Apr 5 | Aug 30 – Sep 20 |
| Radishes | — | — | Mar 22 – May 3 | Sep 13 – Oct 4 |
| Cucumbers | Mar 29 – Apr 5 | May 10 – May 17 | May 3 – May 17 | Aug 9 – Aug 23 |
| Zucchini & Summer Squash | Mar 29 – Apr 5 | — | May 3 – May 17 | Aug 16 – Aug 30 |
| Winter Squash & Pumpkins | Mar 29 – Apr 5 | — | May 3 – May 17 | — |
| Melons & Watermelon | Mar 29 – Apr 5 | May 10 – May 24 | — | — |
| Carrots | — | — | Apr 5 – May 3 | Aug 2 – Aug 16 |
| Beets | — | — | Apr 5 – May 3 | Aug 16 – Aug 30 |
| Potatoes | — | — | Apr 5 – Apr 26 | — |
| Swiss Chard | — | — | Apr 12 – May 10 | Aug 16 – Aug 30 |
| Cilantro | — | — | Apr 12 – May 3 | Aug 30 – Sep 20 |
| Green Beans | — | — | May 3 – May 24 | Aug 9 – Aug 23 |
| Sweet Corn | — | — | May 3 – May 17 | — |
| Sweet Potatoes | — | May 10 – May 31 | — | — |
| Garlic | — | — | — | Oct 11 – Nov 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 Colorado City, AZ weather station, about 1 km away (elevation 5,000 ft (1,524 m)).
Frost dates near Colorado City
- Fredonia Apr 29 · Oct 22
- Littlefield Mar 7 · Nov 19
- Supai Jun 1 · Oct 3
- Marble Canyon Mar 5 · Nov 19
- North Rim Jun 3 · Sep 27
- Page Mar 27 · Nov 9
- Grand Canyon Jun 17 · Sep 24
- Meadview Mar 5 · Nov 28
- Kaibeto Apr 16 · Oct 28
- Peach Springs May 17 · Oct 10
Frequently asked questions
When is the last frost in Colorado City, AZ?
The median last spring frost in Colorado City, AZ is April 26. There is still about a 10% chance of frost after May 15, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Colorado City, AZ?
The median first fall frost is October 25, with about a 10% chance of frost before October 11.
How long is the growing season in Colorado City, AZ?
About 182 days between the median last spring frost and first fall frost.
What planting zone is Colorado City, AZ?
Colorado City, AZ is in USDA hardiness zone 7b.