Heber City, UT frost dates
Last spring frostJun 4median date
First fall frostSep 20median date
Growing season108 daysfrost-free
Hardiness zone6aZone 6a
How Heber City compares
- In 8 years out of 10, the last spring frost in Heber City falls between May 18 and June 21, a 34-day window. The first fall frost falls between September 6 and October 1.
- The median last frost is 25 days later than the Utah median of May 10.
- Its 108-day growing season is longer than 8% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 36 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 181 nights a year at or below 32°F.
- Compared with Orem, UT, 33 km away, the last frost here is 47 days later than there and the growing season is 78 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 18 |
| 50% (median) | June 4 |
| 10% (safe for tender plants) | June 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 6 |
| 50% (median) | September 20 |
| 90% (late) | October 1 |
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 Heber City, UT
Heber City, UT frost dates — last frost Jun 4, first frost Sep 20, zone 6a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 12 to Mar 26Transplant outside: May 7 to May 21
Start indoors: Mar 26 to Apr 9Transplant outside: Jun 18 to Jul 2
Start indoors: Mar 26 to Apr 9Transplant outside: Jun 18 to Jul 2
Start indoors: Apr 9 to Apr 23Transplant outside: Jun 11 to Jun 25
Start indoors: Apr 9 to Apr 23Transplant outside: May 14 to May 28Sow outdoors: May 7 to Jun 11Plant for fall: Jul 26 to Aug 23
Start indoors: Apr 9 to Apr 23Transplant outside: May 7 to May 21Sow outdoors: May 7 to May 21Plant for fall: Jul 12 to Aug 2
Start indoors: Apr 9 to Apr 23Transplant outside: May 21 to Jun 4
Start indoors: Apr 9 to Apr 23Transplant outside: May 14 to May 28
Start indoors: Apr 9 to Apr 23Transplant outside: May 21 to Jun 4
Start indoors: Apr 23 to May 7Transplant outside: Jun 25 to Jul 9Sow outdoors: Jun 25 to Jul 9
Start indoors: Apr 23 to May 7Transplant outside: Jun 11 to Jun 25
Sow outdoors: Apr 23 to May 14Plant for fall: Jun 28 to Jul 19
Sow outdoors: Apr 23 to May 14Plant for fall: Jul 26 to Aug 16
Sow outdoors: Apr 30 to Jun 11Plant for fall: Aug 9 to Aug 30
Start indoors: May 7 to May 14Transplant outside: Jun 18 to Jun 25Sow outdoors: Jun 11 to Jun 25
Start indoors: May 7 to May 14Sow outdoors: Jun 11 to Jun 25Plant for fall: Jul 12 to Jul 26
Start indoors: May 7 to May 14Sow outdoors: Jun 11 to Jun 25
Start indoors: May 7 to May 14Transplant outside: Jun 18 to Jul 2
Sow outdoors: May 14 to Jun 11Plant for fall: Jun 28 to Jul 12
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 12 to Jul 26
Sow outdoors: May 14 to Jun 4
Sow outdoors: May 21 to Jun 18Plant for fall: Jul 12 to Jul 26
Sow outdoors: May 21 to Jun 11Plant for fall: Jul 26 to Aug 16
Sow outdoors: Jun 11 to Jul 2
Sow outdoors: Jun 11 to Jun 25
Transplant outside: Jun 18 to Jul 9
Plant for fall: Sep 6 to Oct 11
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Heber City, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 12 – Mar 26 | May 7 – May 21 | — | — |
| Peppers | Mar 26 – Apr 9 | Jun 18 – Jul 2 | — | — |
| Eggplant | Mar 26 – Apr 9 | Jun 18 – Jul 2 | — | — |
| Tomatoes | Apr 9 – Apr 23 | Jun 11 – Jun 25 | — | — |
| Lettuce | Apr 9 – Apr 23 | May 14 – May 28 | May 7 – Jun 11 | Jul 26 – Aug 23 |
| Kale | Apr 9 – Apr 23 | May 7 – May 21 | May 7 – May 21 | Jul 12 – Aug 2 |
| Broccoli | Apr 9 – Apr 23 | May 21 – Jun 4 | — | — |
| Cabbage | Apr 9 – Apr 23 | May 14 – May 28 | — | — |
| Cauliflower | Apr 9 – Apr 23 | May 21 – Jun 4 | — | — |
| Okra | Apr 23 – May 7 | Jun 25 – Jul 9 | Jun 25 – Jul 9 | — |
| Basil | Apr 23 – May 7 | Jun 11 – Jun 25 | — | — |
| Peas | — | — | Apr 23 – May 14 | Jun 28 – Jul 19 |
| Spinach | — | — | Apr 23 – May 14 | Jul 26 – Aug 16 |
| Radishes | — | — | Apr 30 – Jun 11 | Aug 9 – Aug 30 |
| Cucumbers | May 7 – May 14 | Jun 18 – Jun 25 | Jun 11 – Jun 25 | — |
| Zucchini & Summer Squash | May 7 – May 14 | — | Jun 11 – Jun 25 | Jul 12 – Jul 26 |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 108 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 7 – May 14 | — | Jun 11 – Jun 25 | — |
| Melons & Watermelon | May 7 – May 14 | Jun 18 – Jul 2 | — | — |
| Carrots | — | — | May 14 – Jun 11 | Jun 28 – Jul 12 |
| Beets | — | — | May 14 – Jun 11 | Jul 12 – Jul 26 |
| Potatoes | — | — | May 14 – Jun 4 | — |
| Swiss Chard | — | — | May 21 – Jun 18 | Jul 12 – Jul 26 |
| Cilantro | — | — | May 21 – Jun 11 | Jul 26 – Aug 16 |
| Green Beans | — | — | Jun 11 – Jul 2 | — |
| Sweet Corn | — | — | Jun 11 – Jun 25 | — |
| Sweet Potatoes Warning: Your frost-free season is about 108 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 18 – Jul 9 | — | — |
| Garlic | — | — | — | Sep 6 – Oct 11 |
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 Heber, UT weather station, 2 km away (elevation 5,591 ft (1,704 m)).
Frost dates near Heber City
- Midway May 31 · Sep 11
- Wallsburg May 28 · Sep 23
- Kamas Jun 5 · Sep 17
- Park City May 29 · Sep 25
- Peoa Jun 11 · Sep 12
- Oakley Jun 5 · Sep 17
- Pleasant Grove Apr 17 · Oct 25
- Alpine May 3 · Oct 12
- Lindon Apr 17 · Oct 25
- Orem Apr 18 · Oct 21
Frequently asked questions
When is the last frost in Heber City, UT?
The median last spring frost in Heber City, UT is June 4. There is still about a 10% chance of frost after June 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Heber City, UT?
The median first fall frost is September 20, with about a 10% chance of frost before September 6.
How long is the growing season in Heber City, UT?
About 108 days between the median last spring frost and first fall frost.
What planting zone is Heber City, UT?
Heber City, UT is in USDA hardiness zone 6a.