Frost dates for 84117 — Salt Lake City, UT
How Salt Lake City compares
- In 8 years out of 10, the last spring frost in Salt Lake City falls between April 10 and May 30, a 50-day window. The first fall frost falls between October 6 and November 7.
- The median last frost is 11 days earlier than the Utah median of May 10.
- Its 176-day growing season is longer than 74% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 24 days later than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 112 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 10 |
| 50% (median) | April 29 |
| 10% (safe for tender plants) | May 30 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 6 |
| 50% (median) | October 22 |
| 90% (late) | November 7 |
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 Salt Lake City, UT
Frost dates for 84117 — Salt Lake City, UT — last frost Apr 29, first frost Oct 22, zone 7b. whenisthelastfrost.com
When to plant vegetables in Salt Lake City, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 4 – Feb 18 | Apr 1 – Apr 15 | — | — |
| Peppers | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Eggplant | Feb 18 – Mar 4 | May 13 – May 27 | — | — |
| Tomatoes | Mar 4 – Mar 18 | May 6 – May 20 | — | — |
| Lettuce | Mar 4 – Mar 18 | Apr 8 – Apr 22 | Apr 1 – May 6 | Aug 27 – Sep 24 |
| Kale | Mar 4 – Mar 18 | Apr 1 – Apr 15 | Apr 1 – Apr 15 | Aug 13 – Sep 3 |
| Broccoli | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jul 16 – Aug 6 |
| Cabbage | Mar 4 – Mar 18 | Apr 8 – Apr 22 | — | Jul 16 – Aug 6 |
| Cauliflower | Mar 4 – Mar 18 | Apr 15 – Apr 29 | — | Jul 16 – Aug 6 |
| Okra | Mar 18 – Apr 1 | May 20 – Jun 3 | May 20 – Jun 3 | — |
| Basil | Mar 18 – Apr 1 | May 6 – May 20 | — | — |
| Peas | — | — | Mar 18 – Apr 8 | Jul 30 – Aug 20 |
| Spinach | — | — | Mar 18 – Apr 8 | Aug 27 – Sep 17 |
| Radishes | — | — | Mar 25 – May 6 | Sep 10 – Oct 1 |
| Cucumbers | Apr 1 – Apr 8 | May 13 – May 20 | May 6 – May 20 | Aug 6 – Aug 20 |
| Zucchini & Summer Squash | Apr 1 – Apr 8 | — | May 6 – May 20 | Aug 13 – Aug 27 |
| Winter Squash & Pumpkins | Apr 1 – Apr 8 | — | May 6 – May 20 | — |
| Melons & Watermelon | Apr 1 – Apr 8 | May 13 – May 27 | — | — |
| Carrots | — | — | Apr 8 – May 6 | Jul 30 – Aug 13 |
| Beets | — | — | Apr 8 – May 6 | Aug 13 – Aug 27 |
| Potatoes | — | — | Apr 8 – Apr 29 | — |
| Swiss Chard | — | — | Apr 15 – May 13 | Aug 13 – Aug 27 |
| Cilantro | — | — | Apr 15 – May 6 | Aug 27 – Sep 17 |
| Green Beans | — | — | May 6 – May 27 | Aug 6 – Aug 20 |
| Sweet Corn | — | — | May 6 – May 20 | — |
| Sweet Potatoes | — | May 13 – Jun 3 | — | — |
| Garlic | — | — | — | Oct 8 – Nov 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 Cottonwood Weir, UT weather station, 6 km away (elevation 4,987 ft (1,520 m)).
ZIP codes in Salt Lake City: 84101 84102 84103 84104 84105 84106 84107 84108 84109 84110 84111 84112 84113 84114 84115 84116 84117 84118 84121 84122 84123 84124 84125 84126 84127 84129 84130 84131 84132 84133 84134 84136 84138 84139 84141 84143 84145 84147 84148 84150 84151 84152 84157 84158 84165 84170 84171 84180 84184 84189 84190 84199
Frost dates near Salt Lake City
- Sandy Apr 29 · Oct 22
- Midvale Apr 29 · Oct 22
- South Jordan Apr 18 · Oct 22
- West Jordan Apr 18 · Oct 22
- West Valley City Apr 8 · Oct 31
- Draper Apr 18 · Oct 22
- Riverton Apr 18 · Oct 22
- Magna Apr 3 · Nov 4
Frequently asked questions
When is the last frost in Salt Lake City, UT?
The median last spring frost in Salt Lake City, UT is April 29. There is still about a 10% chance of frost after May 30, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Salt Lake City, UT?
The median first fall frost is October 22, with about a 10% chance of frost before October 6.
How long is the growing season in Salt Lake City, UT?
About 176 days between the median last spring frost and first fall frost.
What planting zone is Salt Lake City, UT?
Salt Lake City, UT is in USDA hardiness zone 7b.