Frost dates for 84530La Sal, UT
The average last spring frost in La Sal is May 17 and the average first fall frost is October 6, giving a typical growing season of about 141 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 17
- Average first fall frost
- Oct 6
- Growing season
- 141 days
Safer after Jun 5 (1-in-10 risk)
Possible by Sep 24 (1-in-10 risk)
Last frost typically in 202 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) | May 14 · May 30 · Jun 14 | Sep 15 · Sep 28 · Oct 10 | 120 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 17 · Jun 5 | Sep 24 · Oct 6 · Oct 19 | 141 days | 100% |
| Hard freeze (28°F) | Apr 19 · May 4 · May 23 | Oct 1 · Oct 14 · Oct 28 | 161 days | 100% |
Planting calendar for La Sal
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 | Apr 16 – Jun 22 |
| Tomatoes | Transplant outdoors | Jun 2 – Jun 16 |
| Peppers | Start seeds indoors | Apr 16 – May 17 |
| Peppers | Transplant outdoors | Jun 16 – Jul 17 |
| Eggplant | Start seeds indoors | May 3 – Jun 1 |
| Eggplant | Transplant outdoors | Jun 16 – Jul 17 |
| Cucumbers | Sow outdoors | Jun 16 – Jun 26 |
| Summer squash | Sow outdoors | Jun 2 – Jul 17 |
| Winter squash & pumpkins | Sow outdoors | Jun 16 – Jul 17 |
| Snap beans | Sow outdoors | Jun 2 – Jul 19 |
| Sweet corn | Sow outdoors | Jun 2 – Jun 16 |
| Watermelon & cantaloupe | Sow outdoors | Jun 16 – Jul 17 |
| Okra | Sow outdoors | Jun 9 – Jul 2 |
| Peas | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Potatoes | Plant outdoors (spring) | Apr 16 – Jun 16 |
| Onions | Start seeds indoors (spring) | Mar 5 – Apr 1 |
| Onions | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (spring) | Mar 29 – May 2 |
| Broccoli | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (fall) | Jun 6 – Jun 16 |
| Broccoli | Transplant outdoors (fall) | Jul 6 – Jul 17 |
| Cabbage | Start seeds indoors (spring) | Mar 19 – Apr 16 |
| Cabbage | Transplant outdoors (spring) | Apr 16 – May 17 |
| Cabbage | Start seeds indoors (fall) | May 27 – Jun 26 |
| Cabbage | Transplant outdoors (fall) | Jun 26 – Jul 27 |
| Leaf lettuce | Sow outdoors (spring) | Apr 16 – Jul 2 |
| Leaf lettuce | Sow outdoors (fall) | Jun 26 – Aug 12 |
| Spinach | Sow outdoors (spring) | Apr 9 – May 23 |
| Spinach | Sow outdoors (fall) | Jul 13 – Aug 17 |
| Radishes | Sow outdoors (spring) | Apr 16 – Jun 6 |
| Radishes | Sow outdoors (fall) | Jun 26 – Aug 27 |
| Kale | Sow outdoors (spring) | May 3 – May 23 |
| Kale | Sow outdoors (fall) | Jun 19 – Jul 27 |
| Carrots | Sow outdoors (spring) | May 17 – Jul 2 |
| Carrots | Sow outdoors (fall) | May 27 – Jul 12 |
| Garlic | Plant outdoors (fall) | Sep 26 – Oct 27 |
Where these dates come from
ZIP code 84530 is matched to the NOAA station La Sal 1Sw, UT, 2 km away, at 6,787 ft elevation (181 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| La Sal 1Sw, UT (used) | 6,787 ft | May 17 | Oct 6 |
| Paradox 2N, CO | 5,447 ft | May 11 | Oct 5 |
| Castle Valley 1Se, UT | 4,905 ft | Apr 19 | Oct 21 |
| Moab, UT | 4,053 ft | Apr 11 | Oct 23 |
Frost dates near La Sal
- Bedrock, CO 81411 · last May 17, first Oct 6
- Paradox, CO 81429 · last May 11, first Oct 5
- Moab, UT 84532 · last Apr 11, first Oct 23
- Monticello, UT 84535 · last May 19, first Oct 2
- Gateway, CO 81522 · last Apr 20, first Oct 21
- Egnar, CO 81325 · last Jun 3, first Sep 25
- Naturita, CO 81422 · last Apr 26, first Oct 18
- Nucla, CO 81424 · last Apr 26, first Oct 18
Frequently asked questions
- When is the last frost in La Sal, UT?
- For ZIP code 84530, the average last spring frost (32°F) is May 17, based on NOAA 1991-2020 climate normals for the La Sal 1Sw, UT weather station. There is a 1-in-10 chance of a frost after June 5.
- When is the first frost in La Sal, UT?
- The average first fall frost (32°F) is October 6. There is a 1-in-10 chance of frost by September 24, so tender plants are at risk from that point on.
- How long is the growing season in 84530?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 141 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.