Frost dates for 84158 — 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 21 and May 27, a 36-day window. The first fall frost falls between September 29 and October 27.
- The median last frost is 3 days earlier than the Utah median of May 10.
- Its 160-day growing season is longer than 59% of the 250 Utah places with a regular frost season (state median 148 days).
- The last frost is 21 days later than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 158 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 21 |
| 50% (median) | May 7 |
| 10% (safe for tender plants) | May 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 29 |
| 50% (median) | October 14 |
| 90% (late) | October 27 |
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 84158 — Salt Lake City, UT — last frost May 7, first frost Oct 14, zone 7a. whenisthelastfrost.com
When to plant vegetables in Salt Lake City, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 12 – Feb 26 | Apr 9 – Apr 23 | — | — |
| Peppers | Feb 26 – Mar 12 | May 21 – Jun 4 | — | — |
| Eggplant | Feb 26 – Mar 12 | May 21 – Jun 4 | — | — |
| Tomatoes | Mar 12 – Mar 26 | May 14 – May 28 | — | — |
| Lettuce | Mar 12 – Mar 26 | Apr 16 – Apr 30 | Apr 9 – May 14 | Aug 19 – Sep 16 |
| Kale | Mar 12 – Mar 26 | Apr 9 – Apr 23 | Apr 9 – Apr 23 | Aug 5 – Aug 26 |
| Broccoli | Mar 12 – Mar 26 | Apr 23 – May 7 | — | Jul 8 – Jul 29 |
| Cabbage | Mar 12 – Mar 26 | Apr 16 – Apr 30 | — | Jul 8 – Jul 29 |
| Cauliflower | Mar 12 – Mar 26 | Apr 23 – May 7 | — | Jul 8 – Jul 29 |
| Okra | Mar 26 – Apr 9 | May 28 – Jun 11 | May 28 – Jun 11 | — |
| Basil | Mar 26 – Apr 9 | May 14 – May 28 | — | — |
| Peas | — | — | Mar 26 – Apr 16 | Jul 22 – Aug 12 |
| Spinach | — | — | Mar 26 – Apr 16 | Aug 19 – Sep 9 |
| Radishes | — | — | Apr 2 – May 14 | Sep 2 – Sep 23 |
| Cucumbers | Apr 9 – Apr 16 | May 21 – May 28 | May 14 – May 28 | Jul 29 – Aug 12 |
| Zucchini & Summer Squash | Apr 9 – Apr 16 | — | May 14 – May 28 | Aug 5 – Aug 19 |
| Winter Squash & Pumpkins | Apr 9 – Apr 16 | — | May 14 – May 28 | — |
| Melons & Watermelon | Apr 9 – Apr 16 | May 21 – Jun 4 | — | — |
| Carrots | — | — | Apr 16 – May 14 | Jul 22 – Aug 5 |
| Beets | — | — | Apr 16 – May 14 | Aug 5 – Aug 19 |
| Potatoes | — | — | Apr 16 – May 7 | — |
| Swiss Chard | — | — | Apr 23 – May 21 | Aug 5 – Aug 19 |
| Cilantro | — | — | Apr 23 – May 14 | Aug 19 – Sep 9 |
| Green Beans | — | — | May 14 – Jun 4 | Jul 29 – Aug 12 |
| Sweet Corn | — | — | May 14 – May 28 | — |
| Sweet Potatoes | — | May 21 – Jun 11 | — | — |
| Garlic | — | — | — | Sep 30 – Nov 4 |
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 Mtn Dell Dam, UT weather station, 4 km away (elevation 5,420 ft (1,652 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
- North Salt Lake Apr 24 · Oct 19
- Bountiful Apr 25 · Oct 24
- Woods Cross Apr 24 · Oct 19
- Sandy Apr 29 · Oct 22
- Midvale Apr 29 · Oct 22
- Centerville Apr 25 · Oct 24
- West Valley City Apr 8 · Oct 31
- Park City May 29 · Sep 25
Frequently asked questions
When is the last frost in Salt Lake City, UT?
The median last spring frost in Salt Lake City, UT is May 7. There is still about a 10% chance of frost after May 27, 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 14, with about a 10% chance of frost before September 29.
How long is the growing season in Salt Lake City, UT?
About 160 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 7a.