Frost dates for 84143 — 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 March 7 and April 19, a 43-day window. The first fall frost falls between October 23 and November 25.
- The median last frost is 40 days earlier than the Utah median of May 10.
- Its 222-day growing season is among the longest of the 250 Utah places with a regular frost season.
- The last frost is 5 days earlier 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 81 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 7 |
| 50% (median) | March 31 |
| 10% (safe for tender plants) | April 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 23 |
| 50% (median) | November 8 |
| 90% (late) | November 25 |
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 84143 — Salt Lake City, UT — last frost Mar 31, first frost Nov 8, zone 7b. whenisthelastfrost.com
When to plant vegetables in Salt Lake City, UT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 6 – Jan 20 | Mar 3 – Mar 17 | — | — |
| Peppers | Jan 20 – Feb 3 | Apr 14 – Apr 28 | — | — |
| Eggplant | Jan 20 – Feb 3 | Apr 14 – Apr 28 | — | — |
| Tomatoes | Feb 3 – Feb 17 | Apr 7 – Apr 21 | — | — |
| Lettuce | Feb 3 – Feb 17 | Mar 10 – Mar 24 | Mar 3 – Apr 7 | Sep 13 – Oct 11 |
| Kale | Feb 3 – Feb 17 | Mar 3 – Mar 17 | Mar 3 – Mar 17 | Aug 30 – Sep 20 |
| Broccoli | Feb 3 – Feb 17 | Mar 17 – Mar 31 | — | Aug 2 – Aug 23 |
| Cabbage | Feb 3 – Feb 17 | Mar 10 – Mar 24 | — | Aug 2 – Aug 23 |
| Cauliflower | Feb 3 – Feb 17 | Mar 17 – Mar 31 | — | Aug 2 – Aug 23 |
| Okra | Feb 17 – Mar 3 | Apr 21 – May 5 | Apr 21 – May 5 | — |
| Basil | Feb 17 – Mar 3 | Apr 7 – Apr 21 | — | — |
| Peas | — | — | Feb 17 – Mar 10 | Aug 16 – Sep 6 |
| Spinach | — | — | Feb 17 – Mar 10 | Sep 13 – Oct 4 |
| Radishes | — | — | Feb 24 – Apr 7 | Sep 27 – Oct 18 |
| Cucumbers | Mar 3 – Mar 10 | Apr 14 – Apr 21 | Apr 7 – Apr 21 | Aug 23 – Sep 6 |
| Zucchini & Summer Squash | Mar 3 – Mar 10 | — | Apr 7 – Apr 21 | Aug 30 – Sep 13 |
| Winter Squash & Pumpkins | Mar 3 – Mar 10 | — | Apr 7 – Apr 21 | — |
| Melons & Watermelon | Mar 3 – Mar 10 | Apr 14 – Apr 28 | — | — |
| Carrots | — | — | Mar 10 – Apr 7 | Aug 16 – Aug 30 |
| Beets | — | — | Mar 10 – Apr 7 | Aug 30 – Sep 13 |
| Potatoes | — | — | Mar 10 – Mar 31 | — |
| Swiss Chard | — | — | Mar 17 – Apr 14 | Aug 30 – Sep 13 |
| Cilantro | — | — | Mar 17 – Apr 7 | Sep 13 – Oct 4 |
| Green Beans | — | — | Apr 7 – Apr 28 | Aug 23 – Sep 6 |
| Sweet Corn | — | — | Apr 7 – Apr 21 | — |
| Sweet Potatoes | — | Apr 14 – May 5 | — | — |
| Garlic | — | — | — | Oct 25 – Nov 29 |
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 Salt Lake Triad Ctr, UT weather station, 2 km away (elevation 4,281 ft (1,305 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
- West Valley City Apr 8 · Oct 31
- Centerville Apr 25 · Oct 24
- Magna Apr 3 · Nov 4
- Midvale Apr 29 · Oct 22
- Sandy Apr 29 · Oct 22
Frequently asked questions
When is the last frost in Salt Lake City, UT?
The median last spring frost in Salt Lake City, UT is March 31. There is still about a 10% chance of frost after April 19, 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 November 8, with about a 10% chance of frost before October 23.
How long is the growing season in Salt Lake City, UT?
About 222 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.