Frost dates for 84112Salt Lake City, UT
The average last spring frost in Salt Lake City is April 25 and the average first fall frost is October 24, giving a typical growing season of about 181 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 25
- Average first fall frost
- Oct 24
- Growing season
- 181 days
Safer after May 14 (1-in-10 risk)
Possible by Oct 9 (1-in-10 risk)
Last frost typically in 180 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 23 · May 8 · May 31 | Sep 30 · Oct 14 · Oct 27 | 156 days | 100% |
| Frost / freeze (32°F) | Apr 5 · Apr 25 · May 14 | Oct 9 · Oct 24 · Nov 7 | 181 days | 100% |
| Hard freeze (28°F) | Mar 12 · Apr 5 · Apr 28 | Oct 20 · Nov 4 · Nov 18 | 209 days | 100% |
Planting calendar for Salt Lake City
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 25 – May 31 |
| Tomatoes | Transplant outdoors | May 11 – Jul 4 |
| Peppers | Start seeds indoors | Mar 25 – Apr 25 |
| Peppers | Transplant outdoors | May 25 – Jun 25 |
| Eggplant | Start seeds indoors | Apr 11 – May 10 |
| Eggplant | Transplant outdoors | May 25 – Jun 25 |
| Cucumbers | Sow outdoors | May 25 – Jul 14 |
| Summer squash | Sow outdoors | May 11 – Jun 25 |
| Winter squash & pumpkins | Sow outdoors | May 25 – Jun 25 |
| Snap beans | Sow outdoors | May 11 – Aug 6 |
| Sweet corn | Sow outdoors | May 11 – Jul 4 |
| Watermelon & cantaloupe | Sow outdoors | May 25 – Jun 25 |
| Okra | Sow outdoors | May 18 – Jun 10 |
| Peas | Sow outdoors (spring) | Mar 25 – May 10 |
| Potatoes | Plant outdoors (spring) | Mar 25 – May 25 |
| Onions | Start seeds indoors (spring) | Feb 11 – Mar 10 |
| Onions | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (spring) | Mar 7 – Apr 10 |
| Broccoli | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (fall) | Jun 24 – Jul 4 |
| Broccoli | Transplant outdoors (fall) | Jul 24 – Aug 4 |
| Cabbage | Start seeds indoors (spring) | Feb 25 – Mar 25 |
| Cabbage | Transplant outdoors (spring) | Mar 25 – Apr 25 |
| Cabbage | Start seeds indoors (fall) | Jun 14 – Jul 14 |
| Cabbage | Transplant outdoors (fall) | Jul 14 – Aug 14 |
| Leaf lettuce | Sow outdoors (spring) | Mar 25 – Jun 10 |
| Leaf lettuce | Sow outdoors (fall) | Jul 14 – Aug 30 |
| Spinach | Sow outdoors (spring) | Mar 18 – May 1 |
| Spinach | Sow outdoors (fall) | Jul 31 – Sep 4 |
| Radishes | Sow outdoors (spring) | Mar 25 – May 15 |
| Radishes | Sow outdoors (fall) | Jul 14 – Sep 14 |
| Kale | Sow outdoors (spring) | Apr 11 – May 1 |
| Kale | Sow outdoors (fall) | Jul 7 – Aug 14 |
| Carrots | Sow outdoors (spring) | Apr 25 – Jun 10 |
| Carrots | Sow outdoors (fall) | Jun 14 – Jul 30 |
| Garlic | Plant outdoors (fall) | Oct 14 – Nov 14 |
Where these dates come from
ZIP code 84112 is matched to the NOAA station Bountiful Bench, UT, 13.9 km away, at 4,950 ft elevation (147 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bountiful Bench, UT (used) | 4,950 ft | Apr 25 | Oct 24 |
| Salt Lake City E Bench, UT | 4,850 ft | Apr 25 | Oct 18 |
| Salt Lake Triad Ctr, UT | 4,280 ft | Mar 31 | Nov 8 |
| City Creek Wtp, UT | 5,340 ft | May 13 | Oct 7 |
Frost dates near Salt Lake City
- Salt Lake City, UT 84113 · last Apr 25, first Oct 24
- North Salt Lake, UT 84054 · last Apr 8, first Oct 31
- Sandy, UT 84090 · last Apr 8, first Oct 31
- Bountiful, UT 84010 · last Apr 24, first Oct 19
- Woods Cross, UT 84087 · last Apr 24, first Oct 19
- West Valley City, UT 84119 · last Apr 8, first Oct 31
- Midvale, UT 84047 · last Apr 18, first Oct 22
- Centerville, UT 84014 · last Apr 24, first Oct 19
Frequently asked questions
- When is the last frost in Salt Lake City, UT?
- For ZIP code 84112, the average last spring frost (32°F) is April 25, based on NOAA 1991-2020 climate normals for the Bountiful Bench, UT weather station. There is a 1-in-10 chance of a frost after May 14.
- When is the first frost in Salt Lake City, UT?
- The average first fall frost (32°F) is October 24. There is a 1-in-10 chance of frost by October 9, so tender plants are at risk from that point on.
- How long is the growing season in 84112?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 181 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.