Frost dates for 84091Sandy, UT
The average last spring frost in Sandy is April 8 and the average first fall frost is October 31, giving a typical growing season of about 204 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 8
- Average first fall frost
- Oct 31
- Growing season
- 204 days
Safer after Apr 30 (1-in-10 risk)
Possible by Oct 17 (1-in-10 risk)
First frost typically in 4 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 8 · Apr 27 · May 14 | Oct 7 · Oct 19 · Nov 2 | 174 days | 100% |
| Frost / freeze (32°F) | Mar 17 · Apr 8 · Apr 30 | Oct 17 · Oct 31 · Nov 13 | 204 days | 100% |
| Hard freeze (28°F) | Feb 27 · Mar 15 · Apr 8 | Oct 27 · Nov 10 · Nov 24 | 237 days | 100% |
Planting calendar for Sandy
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 8 – May 14 |
| Tomatoes | Transplant outdoors | Apr 24 – Jul 11 |
| Peppers | Start seeds indoors | Mar 8 – Apr 8 |
| Peppers | Transplant outdoors | May 8 – Jun 8 |
| Eggplant | Start seeds indoors | Mar 25 – Apr 23 |
| Eggplant | Transplant outdoors | May 8 – Jun 8 |
| Cucumbers | Sow outdoors | May 8 – Jul 21 |
| Summer squash | Sow outdoors | Apr 24 – Jun 8 |
| Winter squash & pumpkins | Sow outdoors | May 8 – Jun 8 |
| Snap beans | Sow outdoors | Apr 24 – Aug 13 |
| Sweet corn | Sow outdoors | Apr 24 – Jul 11 |
| Watermelon & cantaloupe | Sow outdoors | May 8 – Jun 8 |
| Okra | Sow outdoors | May 1 – May 24 |
| Peas | Sow outdoors (spring) | Mar 8 – Apr 23 |
| Potatoes | Plant outdoors (spring) | Mar 8 – May 8 |
| Onions | Start seeds indoors (spring) | Jan 25 – Feb 21 |
| Onions | Transplant outdoors (spring) | Mar 25 – Apr 23 |
| Broccoli | Start seeds indoors (spring) | Feb 18 – Mar 24 |
| Broccoli | Transplant outdoors (spring) | Mar 25 – Apr 23 |
| Broccoli | Start seeds indoors (fall) | Jul 1 – Jul 11 |
| Broccoli | Transplant outdoors (fall) | Jul 31 – Aug 11 |
| Cabbage | Start seeds indoors (spring) | Feb 8 – Mar 8 |
| Cabbage | Transplant outdoors (spring) | Mar 8 – Apr 8 |
| Cabbage | Start seeds indoors (fall) | Jun 21 – Jul 21 |
| Cabbage | Transplant outdoors (fall) | Jul 21 – Aug 21 |
| Leaf lettuce | Sow outdoors (spring) | Mar 8 – May 24 |
| Leaf lettuce | Sow outdoors (fall) | Jul 21 – Sep 6 |
| Spinach | Sow outdoors (spring) | Mar 1 – Apr 14 |
| Spinach | Sow outdoors (fall) | Aug 7 – Sep 11 |
| Radishes | Sow outdoors (spring) | Mar 8 – Apr 28 |
| Radishes | Sow outdoors (fall) | Jul 21 – Sep 21 |
| Kale | Sow outdoors (spring) | Mar 25 – Apr 14 |
| Kale | Sow outdoors (fall) | Jul 14 – Aug 21 |
| Carrots | Sow outdoors (spring) | Apr 8 – May 24 |
| Carrots | Sow outdoors (fall) | Jun 21 – Aug 6 |
| Garlic | Plant outdoors (fall) | Oct 21 – Nov 21 |
Where these dates come from
ZIP code 84091 is matched to the NOAA station Salt Lake City Intl Ap, UT, 13.3 km away, at 4,225 ft elevation (20 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Salt Lake City Intl Ap, UT (used) | 4,225 ft | Apr 8 | Oct 31 |
| 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 |
| Cottonwood Weir, UT | 4,986 ft | Apr 29 | Oct 22 |
Frost dates near Sandy
- Sandy, UT 84090 · last Apr 8, first Oct 31
- Salt Lake City, UT 84110 · last Apr 8, first Oct 31
- Midvale, UT 84047 · last Apr 18, first Oct 22
- West Jordan, UT 84084 · last Apr 18, first Oct 22
- West Valley City, UT 84119 · last Apr 8, first Oct 31
- South Jordan, UT 84009 · last Apr 18, first Oct 22
- Magna, UT 84044 · last Apr 8, first Oct 31
- Draper, UT 84020 · last Apr 18, first Oct 22
Frequently asked questions
- When is the last frost in Sandy, UT?
- For ZIP code 84091, the average last spring frost (32°F) is April 8, based on NOAA 1991-2020 climate normals for the Salt Lake City Intl Ap, UT weather station. There is a 1-in-10 chance of a frost after April 30.
- When is the first frost in Sandy, UT?
- The average first fall frost (32°F) is October 31. There is a 1-in-10 chance of frost by October 17, so tender plants are at risk from that point on.
- How long is the growing season in 84091?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 204 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.