Frost dates for 84720Cedar City, UT
The average last spring frost in Cedar City is May 4 and the average first fall frost is October 13, giving a typical growing season of about 159 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 4
- Average first fall frost
- Oct 13
- Growing season
- 159 days
Safer after May 28 (1-in-10 risk)
Possible by Sep 30 (1-in-10 risk)
Last frost typically in 189 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 30 · May 20 · Jun 8 | Sep 23 · Oct 4 · Oct 19 | 138 days | 100% |
| Frost / freeze (32°F) | Apr 19 · May 4 · May 28 | Sep 30 · Oct 13 · Oct 28 | 159 days | 100% |
| Hard freeze (28°F) | Apr 3 · Apr 22 · May 13 | Oct 6 · Oct 23 · Nov 10 | 181 days | 100% |
Planting calendar for Cedar 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 | Apr 3 – Jun 9 |
| Tomatoes | Transplant outdoors | May 20 – Jun 23 |
| Peppers | Start seeds indoors | Apr 3 – May 4 |
| Peppers | Transplant outdoors | Jun 3 – Jul 4 |
| Eggplant | Start seeds indoors | Apr 20 – May 19 |
| Eggplant | Transplant outdoors | Jun 3 – Jul 4 |
| Cucumbers | Sow outdoors | Jun 3 – Jul 3 |
| Summer squash | Sow outdoors | May 20 – Jul 4 |
| Winter squash & pumpkins | Sow outdoors | Jun 3 – Jul 4 |
| Snap beans | Sow outdoors | May 20 – Jul 26 |
| Sweet corn | Sow outdoors | May 20 – Jun 23 |
| Watermelon & cantaloupe | Sow outdoors | Jun 3 – Jul 4 |
| Okra | Sow outdoors | May 27 – Jun 19 |
| Peas | Sow outdoors (spring) | Apr 3 – May 19 |
| Potatoes | Plant outdoors (spring) | Apr 3 – Jun 3 |
| Onions | Start seeds indoors (spring) | Feb 20 – Mar 19 |
| Onions | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (spring) | Mar 16 – Apr 19 |
| Broccoli | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (fall) | Jun 13 – Jun 23 |
| Broccoli | Transplant outdoors (fall) | Jul 13 – Jul 24 |
| Cabbage | Start seeds indoors (spring) | Mar 6 – Apr 3 |
| Cabbage | Transplant outdoors (spring) | Apr 3 – May 4 |
| Cabbage | Start seeds indoors (fall) | Jun 3 – Jul 3 |
| Cabbage | Transplant outdoors (fall) | Jul 3 – Aug 3 |
| Leaf lettuce | Sow outdoors (spring) | Apr 3 – Jun 19 |
| Leaf lettuce | Sow outdoors (fall) | Jul 3 – Aug 19 |
| Spinach | Sow outdoors (spring) | Mar 27 – May 10 |
| Spinach | Sow outdoors (fall) | Jul 20 – Aug 24 |
| Radishes | Sow outdoors (spring) | Apr 3 – May 24 |
| Radishes | Sow outdoors (fall) | Jul 3 – Sep 3 |
| Kale | Sow outdoors (spring) | Apr 20 – May 10 |
| Kale | Sow outdoors (fall) | Jun 26 – Aug 3 |
| Carrots | Sow outdoors (spring) | May 4 – Jun 19 |
| Carrots | Sow outdoors (fall) | Jun 3 – Jul 19 |
| Garlic | Plant outdoors (fall) | Oct 3 – Nov 3 |
Where these dates come from
ZIP code 84720 is matched to the NOAA station Cedar City, UT, 2.3 km away, at 6,090 ft elevation (247 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cedar City, UT (used) | 6,090 ft | May 4 | Oct 13 |
| Cedar City Muni Ap, UT | 5,586 ft | May 21 | Sep 29 |
| Cedar City 5E, UT | 6,465 ft | May 23 | Oct 4 |
| Brian Head, UT | 9,770 ft | Jun 21 | Sep 12 |
Frost dates near Cedar City
- Cedar City, UT 84721 · last May 4, first Oct 13
- Summit, UT 84772 · last May 4, first Oct 13
- Kanarraville, UT 84742 · last May 21, first Sep 29
- Brian Head, UT 84719 · last Jun 21, first Sep 12
- Parowan, UT 84761 · last May 4, first Oct 13
- New Harmony, UT 84757 · last May 9, first Oct 11
- Paragonah, UT 84760 · last May 21, first Sep 29
- Duck Creek Village, UT 84762 · last Jun 21, first Sep 12
Frequently asked questions
- When is the last frost in Cedar City, UT?
- For ZIP code 84720, the average last spring frost (32°F) is May 4, based on NOAA 1991-2020 climate normals for the Cedar City, UT weather station. There is a 1-in-10 chance of a frost after May 28.
- When is the first frost in Cedar City, UT?
- The average first fall frost (32°F) is October 13. There is a 1-in-10 chance of frost by September 30, so tender plants are at risk from that point on.
- How long is the growing season in 84720?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 159 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.