Frost dates for 84784Hildale, UT
The average last spring frost in Hildale is April 26 and the average first fall frost is October 25, giving a typical growing season of about 180 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 26
- Average first fall frost
- Oct 25
- Growing season
- 180 days
Safer after May 15 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
Last frost typically in 176 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 | Oct 1 · Oct 15 · Oct 29 | 157 days | 100% |
| Frost / freeze (32°F) | Apr 6 · Apr 26 · May 15 | Oct 11 · Oct 25 · Nov 9 | 180 days | 100% |
| Hard freeze (28°F) | Mar 17 · Apr 10 · May 2 | Oct 19 · Nov 5 · Nov 19 | 206 days | 100% |
Planting calendar for Hildale
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 26 – Jun 1 |
| Tomatoes | Transplant outdoors | May 12 – Jul 5 |
| Peppers | Start seeds indoors | Mar 26 – Apr 26 |
| Peppers | Transplant outdoors | May 26 – Jun 26 |
| Eggplant | Start seeds indoors | Apr 12 – May 11 |
| Eggplant | Transplant outdoors | May 26 – Jun 26 |
| Cucumbers | Sow outdoors | May 26 – Jul 15 |
| Summer squash | Sow outdoors | May 12 – Jun 26 |
| Winter squash & pumpkins | Sow outdoors | May 26 – Jun 26 |
| Snap beans | Sow outdoors | May 12 – Aug 7 |
| Sweet corn | Sow outdoors | May 12 – Jul 5 |
| Watermelon & cantaloupe | Sow outdoors | May 26 – Jun 26 |
| Okra | Sow outdoors | May 19 – Jun 11 |
| Peas | Sow outdoors (spring) | Mar 26 – May 11 |
| Potatoes | Plant outdoors (spring) | Mar 26 – May 26 |
| Onions | Start seeds indoors (spring) | Feb 12 – Mar 11 |
| Onions | Transplant outdoors (spring) | Apr 12 – May 11 |
| Broccoli | Start seeds indoors (spring) | Mar 8 – Apr 11 |
| Broccoli | Transplant outdoors (spring) | Apr 12 – May 11 |
| Broccoli | Start seeds indoors (fall) | Jun 25 – Jul 5 |
| Broccoli | Transplant outdoors (fall) | Jul 25 – Aug 5 |
| Cabbage | Start seeds indoors (spring) | Feb 26 – Mar 26 |
| Cabbage | Transplant outdoors (spring) | Mar 26 – Apr 26 |
| Cabbage | Start seeds indoors (fall) | Jun 15 – Jul 15 |
| Cabbage | Transplant outdoors (fall) | Jul 15 – Aug 15 |
| Leaf lettuce | Sow outdoors (spring) | Mar 26 – Jun 11 |
| Leaf lettuce | Sow outdoors (fall) | Jul 15 – Aug 31 |
| Spinach | Sow outdoors (spring) | Mar 19 – May 2 |
| Spinach | Sow outdoors (fall) | Aug 1 – Sep 5 |
| Radishes | Sow outdoors (spring) | Mar 26 – May 16 |
| Radishes | Sow outdoors (fall) | Jul 15 – Sep 15 |
| Kale | Sow outdoors (spring) | Apr 12 – May 2 |
| Kale | Sow outdoors (fall) | Jul 8 – Aug 15 |
| Carrots | Sow outdoors (spring) | Apr 26 – Jun 11 |
| Carrots | Sow outdoors (fall) | Jun 15 – Jul 31 |
| Garlic | Plant outdoors (fall) | Oct 15 – Nov 15 |
Where these dates come from
ZIP code 84784 is matched to the NOAA station Colorado City, AZ, 1.3 km away, at 5,001 ft elevation (193 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Colorado City, AZ (used) | 5,001 ft | Apr 26 | Oct 25 |
| Zion Np, UT | 4,038 ft | Apr 13 | Nov 2 |
| Pipe Spring Nm, AZ | 4,920 ft | May 1 | Oct 19 |
| La Verkin, UT | 3,194 ft | Apr 1 | Nov 5 |
Frost dates near Hildale
- Colorado City, AZ 86021 · last Apr 26, first Oct 25
- Rockville, UT 84763 · last Apr 13, first Nov 2
- Springdale, UT 84767 · last Apr 13, first Nov 2
- Virgin, UT 84779 · last Apr 1, first Nov 5
- La Verkin, UT 84745 · last Apr 13, first Nov 2
- Hurricane, UT 84737 · last Apr 1, first Nov 5
- Toquerville, UT 84774 · last Apr 1, first Nov 5
- Mount Carmel, UT 84755 · last May 15, first Oct 8
Frequently asked questions
- When is the last frost in Hildale, UT?
- For ZIP code 84784, the average last spring frost (32°F) is April 26, based on NOAA 1991-2020 climate normals for the Colorado City, AZ weather station. There is a 1-in-10 chance of a frost after May 15.
- When is the first frost in Hildale, UT?
- The average first fall frost (32°F) is October 25. There is a 1-in-10 chance of frost by October 11, so tender plants are at risk from that point on.
- How long is the growing season in 84784?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 180 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.