Sunnyside, UT frost dates
Last spring frostApr 26median date
First fall frostOct 25median date
Growing season182 daysfrost-free
Hardiness zone6bZone 6b
How Sunnyside compares
- In 8 years out of 10, the last spring frost in Sunnyside falls between April 8 and May 18, a 40-day window. The first fall frost falls between October 7 and November 11.
- The median last frost is 14 days earlier than the Utah median of May 10.
- Its 182-day growing season is longer than 81% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 4 days later than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 128 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 8 |
| 50% (median) | April 26 |
| 10% (safe for tender plants) | May 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 7 |
| 50% (median) | October 25 |
| 90% (late) | November 11 |
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 Sunnyside, UT
Sunnyside, UT frost dates — last frost Apr 26, first frost Oct 25, zone 6b. 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 Sunnyside, UT
| 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 Sunnyside City, UT weather station, about 1 km away (elevation 6,512 ft (1,985 m)).
Frost dates near Sunnyside
- East Carbon Apr 26 · Oct 25
- Wellington May 27 · Sep 26
- Price May 3 · Oct 12
- Kenilworth May 3 · Oct 12
- Elmo May 27 · Sep 26
- Helper May 3 · Oct 12
- Cleveland May 18 · Sep 27
- Huntington May 18 · Sep 27
- Green River Apr 22 · Oct 20
- Castle Dale May 18 · Sep 27
Frequently asked questions
When is the last frost in Sunnyside, UT?
The median last spring frost in Sunnyside, UT is April 26. There is still about a 10% chance of frost after May 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sunnyside, UT?
The median first fall frost is October 25, with about a 10% chance of frost before October 7.
How long is the growing season in Sunnyside, UT?
About 182 days between the median last spring frost and first fall frost.
What planting zone is Sunnyside, UT?
Sunnyside, UT is in USDA hardiness zone 6b.