Huntsville, UT frost dates
Last spring frostJun 4median date
First fall frostSep 16median date
Growing season104 daysfrost-free
Hardiness zone6aZone 6a
How Huntsville compares
- In 8 years out of 10, the last spring frost in Huntsville falls between May 15 and June 22, a 38-day window. The first fall frost falls between September 1 and October 1.
- The median last frost is 25 days later than the Utah median of May 10.
- Its 104-day growing season is longer than 6% 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 204 nights a year at or below 32°F.
- Compared with Ogden, UT, 17 km away, the last frost here is 44 days later than there and the growing season is 81 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 15 |
| 50% (median) | June 4 |
| 10% (safe for tender plants) | June 22 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 1 |
| 50% (median) | September 16 |
| 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 Huntsville, UT
Huntsville, UT frost dates — last frost Jun 4, first frost Sep 16, 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 22 to Aug 19
Start indoors: Apr 9 to Apr 23Transplant outside: May 7 to May 21Sow outdoors: May 7 to May 21Plant for fall: Jul 8 to Jul 29
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 24 to Jul 15
Sow outdoors: Apr 23 to May 14Plant for fall: Jul 22 to Aug 12
Sow outdoors: Apr 30 to Jun 11Plant for fall: Aug 5 to Aug 26
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 25
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 11
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 8 to Jul 22
Sow outdoors: May 14 to Jun 4
Sow outdoors: May 21 to Jun 18Plant for fall: Jul 8 to Jul 22
Sow outdoors: May 21 to Jun 11Plant for fall: Jul 22 to Aug 12
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 2 to Oct 7
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Huntsville, 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 22 – Aug 19 |
| Kale | Apr 9 – Apr 23 | May 7 – May 21 | May 7 – May 21 | Jul 8 – Jul 29 |
| 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 24 – Jul 15 |
| Spinach | — | — | Apr 23 – May 14 | Jul 22 – Aug 12 |
| Radishes | — | — | Apr 30 – Jun 11 | Aug 5 – Aug 26 |
| Cucumbers | May 7 – May 14 | Jun 18 – Jun 25 | Jun 11 – Jun 25 | — |
| Zucchini & Summer Squash | May 7 – May 14 | — | Jun 11 – Jun 25 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 104 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 | — |
| Beets | — | — | May 14 – Jun 11 | Jul 8 – Jul 22 |
| Potatoes | — | — | May 14 – Jun 4 | — |
| Swiss Chard | — | — | May 21 – Jun 18 | Jul 8 – Jul 22 |
| Cilantro | — | — | May 21 – Jun 11 | Jul 22 – Aug 12 |
| Green Beans | — | — | Jun 11 – Jul 2 | — |
| Sweet Corn | — | — | Jun 11 – Jun 25 | — |
| Sweet Potatoes Warning: Your frost-free season is about 104 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 18 – Jul 9 | — | — |
| Garlic | — | — | — | Sep 2 – Oct 7 |
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 Huntsville Monastery, UT weather station, 5 km away (elevation 5,141 ft (1,567 m)).
Frost dates near Huntsville
- Eden May 25 · Sep 26
- Ogden Apr 21 · Oct 23
- Morgan May 25 · Sep 24
- Hill Afb Apr 29 · Oct 20
- Roy Apr 22 · Oct 22
- Layton Apr 29 · Oct 20
- Willard May 5 · Oct 5
- Mantua May 5 · Oct 5
- Kaysville Apr 19 · Oct 19
- Croydon May 30 · Sep 18
Frequently asked questions
When is the last frost in Huntsville, UT?
The median last spring frost in Huntsville, UT is June 4. There is still about a 10% chance of frost after June 22, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Huntsville, UT?
The median first fall frost is September 16, with about a 10% chance of frost before September 1.
How long is the growing season in Huntsville, UT?
About 104 days between the median last spring frost and first fall frost.
What planting zone is Huntsville, UT?
Huntsville, UT is in USDA hardiness zone 6a.