Joseph, UT frost dates
Last spring frostJun 4median date
First fall frostSep 21median date
Growing season109 daysfrost-free
Hardiness zone6aZone 6a
How Joseph compares
- In 8 years out of 10, the last spring frost in Joseph falls between May 19 and June 21, a 33-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 109-day growing season is longer than 9% 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 207 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 19 |
| 50% (median) | June 4 |
| 10% (safe for tender plants) | June 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 6 |
| 50% (median) | September 21 |
| 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 Joseph, UT
Joseph, UT frost dates — last frost Jun 4, first frost Sep 21, 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 27 to Aug 24
Start indoors: Apr 9 to Apr 23Transplant outside: May 7 to May 21Sow outdoors: May 7 to May 21Plant for fall: Jul 13 to Aug 3
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 29 to Jul 20
Sow outdoors: Apr 23 to May 14Plant for fall: Jul 27 to Aug 17
Sow outdoors: Apr 30 to Jun 11Plant for fall: Aug 10 to Aug 31
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 13 to Jul 27
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 29 to Jul 13
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 14 to Jun 4
Sow outdoors: May 21 to Jun 18Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 21 to Jun 11Plant for fall: Jul 27 to Aug 17
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 7 to Oct 12
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Joseph, 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 27 – Aug 24 |
| Kale | Apr 9 – Apr 23 | May 7 – May 21 | May 7 – May 21 | Jul 13 – Aug 3 |
| 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 29 – Jul 20 |
| Spinach | — | — | Apr 23 – May 14 | Jul 27 – Aug 17 |
| Radishes | — | — | Apr 30 – Jun 11 | Aug 10 – Aug 31 |
| 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 13 – Jul 27 |
| 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 7 – May 14 | — | Jun 11 – Jun 25 | — |
| Melons & Watermelon | May 7 – May 14 | Jun 18 – Jul 2 | — | — |
| Carrots | — | — | May 14 – Jun 11 | Jun 29 – Jul 13 |
| Beets | — | — | May 14 – Jun 11 | Jul 13 – Jul 27 |
| Potatoes | — | — | May 14 – Jun 4 | — |
| Swiss Chard | — | — | May 21 – Jun 18 | Jul 13 – Jul 27 |
| Cilantro | — | — | May 21 – Jun 11 | Jul 27 – Aug 17 |
| Green Beans | — | — | Jun 11 – Jul 2 | — |
| Sweet Corn | — | — | Jun 11 – Jun 25 | — |
| 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 18 – Jul 9 | — | — |
| Garlic | — | — | — | Sep 7 – Oct 12 |
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 Fremont Indian Sp, UT weather station, 11 km away (elevation 5,919 ft (1,804 m)).
Frost dates near Joseph
- Elsinore May 21 · Sep 24
- Sevier Jun 4 · Sep 21
- Monroe May 21 · Sep 24
- Annabella May 21 · Sep 24
- Richfield May 21 · Sep 24
- Marysvale May 24 · Sep 25
- Glenwood May 21 · Sep 24
- Kanosh Apr 30 · Oct 19
- Koosharem Jun 6 · Sep 21
- Sigurd May 21 · Sep 24
Frequently asked questions
When is the last frost in Joseph, UT?
The median last spring frost in Joseph, 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 Joseph, UT?
The median first fall frost is September 21, with about a 10% chance of frost before September 6.
How long is the growing season in Joseph, UT?
About 109 days between the median last spring frost and first fall frost.
What planting zone is Joseph, UT?
Joseph, UT is in USDA hardiness zone 6a.