Hanna, UT frost dates
Last spring frostJun 11median date
First fall frostSep 18median date
Growing season99 daysfrost-free
Hardiness zone5aZone 5a
How Hanna compares
- In 8 years out of 10, the last spring frost in Hanna falls between May 29 and June 24, a 26-day window. The first fall frost falls between September 5 and September 30.
- The median last frost is 32 days later than the Utah median of May 10.
- Its 99-day growing season is longer than 4% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 39 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 230 nights a year at or below 32°F.
- Compared with Provo, UT, 74 km away, the last frost here is 54 days later than there and the growing season is 87 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 29 |
| 50% (median) | June 11 |
| 10% (safe for tender plants) | June 24 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 5 |
| 50% (median) | September 18 |
| 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 Hanna, UT
Hanna, UT frost dates — last frost Jun 11, first frost Sep 18, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 19 to Apr 2Transplant outside: May 14 to May 28
Start indoors: Apr 2 to Apr 16Transplant outside: Jun 25 to Jul 9
Start indoors: Apr 2 to Apr 16Transplant outside: Jun 25 to Jul 9
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 18 to Jul 2
Start indoors: Apr 16 to Apr 30Transplant outside: May 21 to Jun 4Sow outdoors: May 14 to Jun 18Plant for fall: Jul 24 to Aug 21
Start indoors: Apr 16 to Apr 30Transplant outside: May 14 to May 28Sow outdoors: May 14 to May 28Plant for fall: Jul 10 to Jul 31
Start indoors: Apr 16 to Apr 30Transplant outside: May 28 to Jun 11
Start indoors: Apr 16 to Apr 30Transplant outside: May 21 to Jun 4
Start indoors: Apr 16 to Apr 30Transplant outside: May 28 to Jun 11
Start indoors: Apr 30 to May 14Transplant outside: Jul 2 to Jul 16Sow outdoors: Jul 2 to Jul 16
Start indoors: Apr 30 to May 14Transplant outside: Jun 18 to Jul 2
Sow outdoors: Apr 30 to May 21Plant for fall: Jun 26 to Jul 17
Sow outdoors: Apr 30 to May 21Plant for fall: Jul 24 to Aug 14
Sow outdoors: May 7 to Jun 18Plant for fall: Aug 7 to Aug 28
Start indoors: May 14 to May 21Transplant outside: Jun 25 to Jul 2Sow outdoors: Jun 18 to Jul 2
Start indoors: May 14 to May 21Sow outdoors: Jun 18 to Jul 2
Start indoors: May 14 to May 21Sow outdoors: Jun 18 to Jul 2
Start indoors: May 14 to May 21Transplant outside: Jun 25 to Jul 9
Sow outdoors: May 21 to Jun 18
Sow outdoors: May 21 to Jun 18Plant for fall: Jul 10 to Jul 24
Sow outdoors: May 21 to Jun 11
Sow outdoors: May 28 to Jun 25Plant for fall: Jul 10 to Jul 24
Sow outdoors: May 28 to Jun 18Plant for fall: Jul 24 to Aug 14
Sow outdoors: Jun 18 to Jul 9
Sow outdoors: Jun 18 to Jul 2
Transplant outside: Jun 25 to Jul 16
Plant for fall: Sep 4 to Oct 9
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Hanna, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 19 – Apr 2 | May 14 – May 28 | — | — |
| Peppers | Apr 2 – Apr 16 | Jun 25 – Jul 9 | — | — |
| Eggplant | Apr 2 – Apr 16 | Jun 25 – Jul 9 | — | — |
| Tomatoes | Apr 16 – Apr 30 | Jun 18 – Jul 2 | — | — |
| Lettuce | Apr 16 – Apr 30 | May 21 – Jun 4 | May 14 – Jun 18 | Jul 24 – Aug 21 |
| Kale | Apr 16 – Apr 30 | May 14 – May 28 | May 14 – May 28 | Jul 10 – Jul 31 |
| Broccoli | Apr 16 – Apr 30 | May 28 – Jun 11 | — | — |
| Cabbage | Apr 16 – Apr 30 | May 21 – Jun 4 | — | — |
| Cauliflower | Apr 16 – Apr 30 | May 28 – Jun 11 | — | — |
| Okra | Apr 30 – May 14 | Jul 2 – Jul 16 | Jul 2 – Jul 16 | — |
| Basil | Apr 30 – May 14 | Jun 18 – Jul 2 | — | — |
| Peas | — | — | Apr 30 – May 21 | Jun 26 – Jul 17 |
| Spinach | — | — | Apr 30 – May 21 | Jul 24 – Aug 14 |
| Radishes | — | — | May 7 – Jun 18 | Aug 7 – Aug 28 |
| Cucumbers | May 14 – May 21 | Jun 25 – Jul 2 | Jun 18 – Jul 2 | — |
| Zucchini & Summer Squash | May 14 – May 21 | — | Jun 18 – Jul 2 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 99 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 14 – May 21 | — | Jun 18 – Jul 2 | — |
| Melons & Watermelon | May 14 – May 21 | Jun 25 – Jul 9 | — | — |
| Carrots | — | — | May 21 – Jun 18 | — |
| Beets | — | — | May 21 – Jun 18 | Jul 10 – Jul 24 |
| Potatoes | — | — | May 21 – Jun 11 | — |
| Swiss Chard | — | — | May 28 – Jun 25 | Jul 10 – Jul 24 |
| Cilantro | — | — | May 28 – Jun 18 | Jul 24 – Aug 14 |
| Green Beans | — | — | Jun 18 – Jul 9 | — |
| Sweet Corn | — | — | Jun 18 – Jul 2 | — |
| Sweet Potatoes Warning: Your frost-free season is about 99 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 25 – Jul 16 | — | — |
| Garlic | — | — | — | Sep 4 – Oct 9 |
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 Moon Lake, UT weather station, 30 km away (elevation 8,127 ft (2,477 m)).
Frost dates near Hanna
- Tabiona Jun 11 · Sep 18
- Fruitland May 6 · Oct 5
- Mountain Home May 31 · Sep 23
- Talmage May 31 · Sep 23
- Kamas Jun 5 · Sep 17
- Altonah May 31 · Sep 23
- Altamont May 31 · Sep 23
- Duchesne May 6 · Oct 5
- Oakley Jun 5 · Sep 17
- Heber City Jun 4 · Sep 20
Frequently asked questions
When is the last frost in Hanna, UT?
The median last spring frost in Hanna, UT is June 11. There is still about a 10% chance of frost after June 24, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Hanna, UT?
The median first fall frost is September 18, with about a 10% chance of frost before September 5.
How long is the growing season in Hanna, UT?
About 99 days between the median last spring frost and first fall frost.
What planting zone is Hanna, UT?
Hanna, UT is in USDA hardiness zone 5a.