Junction, UT frost dates
Last spring frostMay 23median date
First fall frostSep 27median date
Growing season127 daysfrost-free
Hardiness zone6aZone 6a
How Junction compares
- In 8 years out of 10, the last spring frost in Junction falls between May 4 and June 13, a 40-day window. The first fall frost falls between September 12 and October 8.
- The median last frost is 13 days later than the Utah median of May 10.
- Its 127-day growing season is longer than 32% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 24 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 186 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 4 |
| 50% (median) | May 23 |
| 10% (safe for tender plants) | June 13 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 12 |
| 50% (median) | September 27 |
| 90% (late) | October 8 |
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 Junction, UT
Junction, UT frost dates — last frost May 23, first frost Sep 27, zone 6a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 28 to Mar 14Transplant outside: Apr 25 to May 9
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 28 to Apr 11Transplant outside: May 30 to Jun 13
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Sow outdoors: Apr 25 to May 30Plant for fall: Aug 2 to Aug 30
Start indoors: Mar 28 to Apr 11Transplant outside: Apr 25 to May 9Sow outdoors: Apr 25 to May 9Plant for fall: Jul 19 to Aug 9
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 21 to Jul 12
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Plant for fall: Jun 21 to Jul 12
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 11 to Apr 25Transplant outside: Jun 13 to Jun 27Sow outdoors: Jun 13 to Jun 27
Start indoors: Apr 11 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 11 to May 2Plant for fall: Jul 5 to Jul 26
Sow outdoors: Apr 11 to May 2Plant for fall: Aug 2 to Aug 23
Sow outdoors: Apr 18 to May 30Plant for fall: Aug 16 to Sep 6
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 13Sow outdoors: May 30 to Jun 13Plant for fall: Jul 12 to Jul 26
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13Plant for fall: Jul 19 to Aug 2
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: May 2 to May 30Plant for fall: Jul 5 to Jul 19
Sow outdoors: May 2 to May 30Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 2 to May 23
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 9 to May 30Plant for fall: Aug 2 to Aug 23
Sow outdoors: May 30 to Jun 20Plant for fall: Jul 12 to Jul 26
Sow outdoors: May 30 to Jun 13
Transplant outside: Jun 6 to Jun 27
Plant for fall: Sep 13 to Oct 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Junction, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 28 – Mar 14 | Apr 25 – May 9 | — | — |
| Peppers | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Eggplant | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Tomatoes | Mar 28 – Apr 11 | May 30 – Jun 13 | — | — |
| Lettuce | Mar 28 – Apr 11 | May 2 – May 16 | Apr 25 – May 30 | Aug 2 – Aug 30 |
| Kale | Mar 28 – Apr 11 | Apr 25 – May 9 | Apr 25 – May 9 | Jul 19 – Aug 9 |
| Broccoli | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 21 – Jul 12 |
| Cabbage | Mar 28 – Apr 11 | May 2 – May 16 | — | Jun 21 – Jul 12 |
| Cauliflower | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 21 – Jul 12 |
| Okra | Apr 11 – Apr 25 | Jun 13 – Jun 27 | Jun 13 – Jun 27 | — |
| Basil | Apr 11 – Apr 25 | May 30 – Jun 13 | — | — |
| Peas | — | — | Apr 11 – May 2 | Jul 5 – Jul 26 |
| Spinach | — | — | Apr 11 – May 2 | Aug 2 – Aug 23 |
| Radishes | — | — | Apr 18 – May 30 | Aug 16 – Sep 6 |
| Cucumbers | Apr 25 – May 2 | Jun 6 – Jun 13 | May 30 – Jun 13 | Jul 12 – Jul 26 |
| Zucchini & Summer Squash | Apr 25 – May 2 | — | May 30 – Jun 13 | Jul 19 – Aug 2 |
| Winter Squash & Pumpkins | Apr 25 – May 2 | — | May 30 – Jun 13 | — |
| Melons & Watermelon | Apr 25 – May 2 | Jun 6 – Jun 20 | — | — |
| Carrots | — | — | May 2 – May 30 | Jul 5 – Jul 19 |
| Beets | — | — | May 2 – May 30 | Jul 19 – Aug 2 |
| Potatoes | — | — | May 2 – May 23 | — |
| Swiss Chard | — | — | May 9 – Jun 6 | Jul 19 – Aug 2 |
| Cilantro | — | — | May 9 – May 30 | Aug 2 – Aug 23 |
| Green Beans | — | — | May 30 – Jun 20 | Jul 12 – Jul 26 |
| Sweet Corn | — | — | May 30 – Jun 13 | — |
| Sweet Potatoes | — | Jun 6 – Jun 27 | — | — |
| Garlic | — | — | — | Sep 13 – Oct 18 |
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 Circleville, UT weather station, 9 km away (elevation 6,050 ft (1,844 m)).
Frost dates near Junction
- Kingston May 23 · Sep 27
- Circleville May 23 · Sep 27
- Marysvale May 24 · Sep 25
- Antimony Jun 17 · Sep 12
- Beaver Jun 1 · Sep 28
- Greenwich Jun 6 · Sep 21
- Sevier Jun 4 · Sep 21
- Joseph Jun 4 · Sep 21
- Koosharem Jun 6 · Sep 21
- Greenville Jun 1 · Sep 28
Frequently asked questions
When is the last frost in Junction, UT?
The median last spring frost in Junction, UT is May 23. There is still about a 10% chance of frost after June 13, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Junction, UT?
The median first fall frost is September 27, with about a 10% chance of frost before September 12.
How long is the growing season in Junction, UT?
About 127 days between the median last spring frost and first fall frost.
What planting zone is Junction, UT?
Junction, UT is in USDA hardiness zone 6a.