Guffey, CO frost dates
Last spring frostJun 2median date
First fall frostSep 19median date
Growing season109 daysfrost-free
Hardiness zone5bZone 5b
How Guffey compares
- In 8 years out of 10, the last spring frost in Guffey falls between May 19 and June 17, a 29-day window. The first fall frost falls between September 6 and September 30.
- The median last frost is 22 days later than the Colorado median of May 11.
- Its 109-day growing season is longer than 17% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 32 days later than the zone 5b median of May 1. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5b chart.
- The weather station records an average of 228 nights a year at or below 32°F.
- Compared with Colorado Springs, CO, 70 km away, the last frost here is 30 days later than there and the growing season is 49 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 19 |
| 50% (median) | June 2 |
| 10% (safe for tender plants) | June 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 6 |
| 50% (median) | September 19 |
| 90% (late) | September 30 |
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 Guffey, CO
Guffey, CO frost dates — last frost Jun 2, first frost Sep 19, zone 5b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 10 to Mar 24Transplant outside: May 5 to May 19
Start indoors: Mar 24 to Apr 7Transplant outside: Jun 16 to Jun 30
Start indoors: Mar 24 to Apr 7Transplant outside: Jun 16 to Jun 30
Start indoors: Apr 7 to Apr 21Transplant outside: Jun 9 to Jun 23
Start indoors: Apr 7 to Apr 21Transplant outside: May 12 to May 26Sow outdoors: May 5 to Jun 9Plant for fall: Jul 25 to Aug 22
Start indoors: Apr 7 to Apr 21Transplant outside: May 5 to May 19Sow outdoors: May 5 to May 19Plant for fall: Jul 11 to Aug 1
Start indoors: Apr 7 to Apr 21Transplant outside: May 19 to Jun 2
Start indoors: Apr 7 to Apr 21Transplant outside: May 12 to May 26
Start indoors: Apr 7 to Apr 21Transplant outside: May 19 to Jun 2
Start indoors: Apr 21 to May 5Transplant outside: Jun 23 to Jul 7Sow outdoors: Jun 23 to Jul 7
Start indoors: Apr 21 to May 5Transplant outside: Jun 9 to Jun 23
Sow outdoors: Apr 21 to May 12Plant for fall: Jun 27 to Jul 18
Sow outdoors: Apr 21 to May 12Plant for fall: Jul 25 to Aug 15
Sow outdoors: Apr 28 to Jun 9Plant for fall: Aug 8 to Aug 29
Start indoors: May 5 to May 12Transplant outside: Jun 16 to Jun 23Sow outdoors: Jun 9 to Jun 23
Start indoors: May 5 to May 12Sow outdoors: Jun 9 to Jun 23Plant for fall: Jul 11 to Jul 25
Start indoors: May 5 to May 12Sow outdoors: Jun 9 to Jun 23
Start indoors: May 5 to May 12Transplant outside: Jun 16 to Jun 30
Sow outdoors: May 12 to Jun 9Plant for fall: Jun 27 to Jul 11
Sow outdoors: May 12 to Jun 9Plant for fall: Jul 11 to Jul 25
Sow outdoors: May 12 to Jun 2
Sow outdoors: May 19 to Jun 16Plant for fall: Jul 11 to Jul 25
Sow outdoors: May 19 to Jun 9Plant for fall: Jul 25 to Aug 15
Sow outdoors: Jun 9 to Jun 30
Sow outdoors: Jun 9 to Jun 23
Transplant outside: Jun 16 to Jul 7
Plant for fall: Sep 5 to Oct 10
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Guffey, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 10 – Mar 24 | May 5 – May 19 | — | — |
| Peppers | Mar 24 – Apr 7 | Jun 16 – Jun 30 | — | — |
| Eggplant | Mar 24 – Apr 7 | Jun 16 – Jun 30 | — | — |
| Tomatoes | Apr 7 – Apr 21 | Jun 9 – Jun 23 | — | — |
| Lettuce | Apr 7 – Apr 21 | May 12 – May 26 | May 5 – Jun 9 | Jul 25 – Aug 22 |
| Kale | Apr 7 – Apr 21 | May 5 – May 19 | May 5 – May 19 | Jul 11 – Aug 1 |
| Broccoli | Apr 7 – Apr 21 | May 19 – Jun 2 | — | — |
| Cabbage | Apr 7 – Apr 21 | May 12 – May 26 | — | — |
| Cauliflower | Apr 7 – Apr 21 | May 19 – Jun 2 | — | — |
| Okra | Apr 21 – May 5 | Jun 23 – Jul 7 | Jun 23 – Jul 7 | — |
| Basil | Apr 21 – May 5 | Jun 9 – Jun 23 | — | — |
| Peas | — | — | Apr 21 – May 12 | Jun 27 – Jul 18 |
| Spinach | — | — | Apr 21 – May 12 | Jul 25 – Aug 15 |
| Radishes | — | — | Apr 28 – Jun 9 | Aug 8 – Aug 29 |
| Cucumbers | May 5 – May 12 | Jun 16 – Jun 23 | Jun 9 – Jun 23 | — |
| Zucchini & Summer Squash | May 5 – May 12 | — | Jun 9 – Jun 23 | Jul 11 – Jul 25 |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 109 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 5 – May 12 | — | Jun 9 – Jun 23 | — |
| Melons & Watermelon | May 5 – May 12 | Jun 16 – Jun 30 | — | — |
| Carrots | — | — | May 12 – Jun 9 | Jun 27 – Jul 11 |
| Beets | — | — | May 12 – Jun 9 | Jul 11 – Jul 25 |
| Potatoes | — | — | May 12 – Jun 2 | — |
| Swiss Chard | — | — | May 19 – Jun 16 | Jul 11 – Jul 25 |
| Cilantro | — | — | May 19 – Jun 9 | Jul 25 – Aug 15 |
| Green Beans | — | — | Jun 9 – Jun 30 | — |
| Sweet Corn | — | — | Jun 9 – Jun 23 | — |
| Sweet Potatoes Warning: Your frost-free season is about 109 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 16 – Jul 7 | — | — |
| Garlic | — | — | — | Sep 5 – Oct 10 |
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 Lake George 8 Sw, CO weather station, 14 km away (elevation 8,550 ft (2,606 m)).
Frost dates near Guffey
- Florissant frost any month
- Lake George Jun 2 · Sep 19
- Hartsel frost any month
- Divide Jun 1 · Sep 21
- Cripple Creek May 26 · Sep 26
- Victor May 26 · Sep 26
- Como Jun 16 · Sep 9
- Canon City May 4 · Oct 7
- Howard May 29 · Sep 20
- Nathrop May 27 · Sep 23
Frequently asked questions
When is the last frost in Guffey, CO?
The median last spring frost in Guffey, CO is June 2. There is still about a 10% chance of frost after June 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Guffey, CO?
The median first fall frost is September 19, with about a 10% chance of frost before September 6.
How long is the growing season in Guffey, CO?
About 109 days between the median last spring frost and first fall frost.
What planting zone is Guffey, CO?
Guffey, CO is in USDA hardiness zone 5b.