Frost dates for 84766Sevier, UT
The average last spring frost in Sevier is June 4 and the average first fall frost is September 21, giving a typical growing season of about 106 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 4
- Average first fall frost
- Sep 21
- Growing season
- 106 days
Safer after Jun 21 (1-in-10 risk)
Possible by Sep 6 (1-in-10 risk)
Last frost typically in 215 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) | Jun 4 · Jun 16 · Jul 1 | Aug 27 · Sep 12 · Sep 23 | 85 days | 100% |
| Frost / freeze (32°F) | May 19 · Jun 4 · Jun 21 | Sep 6 · Sep 21 · Oct 1 | 106 days | 100% |
| Hard freeze (28°F) | May 4 · May 19 · Jun 10 | Sep 18 · Sep 29 · Oct 13 | 129 days | 100% |
Planting calendar for Sevier
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 | May 4 – Jul 10 |
| Tomatoes | Transplant outdoors | Jun 20 – Jun 1 |
| Peppers | Start seeds indoors | May 4 – Jun 4 |
| Peppers | Transplant outdoors | Jul 4 – Aug 4 |
| Eggplant | Start seeds indoors | May 21 – Jun 19 |
| Eggplant | Transplant outdoors | Jul 4 – Aug 4 |
| Cucumbers | Sow outdoors | Jul 4 – Jun 11 |
| Summer squash | Sow outdoors | Jun 20 – Aug 4 |
| Winter squash & pumpkins | Sow outdoors | Jul 4 – Aug 4 |
| Snap beans | Sow outdoors | Jun 20 – Jul 4 |
| Sweet corn | Sow outdoors | Jun 20 – Jun 1 |
| Watermelon & cantaloupe | Sow outdoors | Jul 4 – Aug 4 |
| Okra | Sow outdoors | Jun 27 – Jul 20 |
| Peas | Sow outdoors (spring) | May 4 – Jun 19 |
| Potatoes | Plant outdoors (spring) | May 4 – Jul 4 |
| Onions | Start seeds indoors (spring) | Mar 23 – Apr 19 |
| Onions | Transplant outdoors (spring) | May 21 – Jun 19 |
| Broccoli | Start seeds indoors (spring) | Apr 16 – May 20 |
| Broccoli | Transplant outdoors (spring) | May 21 – Jun 19 |
| Broccoli | Start seeds indoors (fall) | May 22 – Jun 1 |
| Broccoli | Transplant outdoors (fall) | Jun 21 – Jul 2 |
| Cabbage | Start seeds indoors (spring) | Apr 6 – May 4 |
| Cabbage | Transplant outdoors (spring) | May 4 – Jun 4 |
| Cabbage | Start seeds indoors (fall) | May 12 – Jun 11 |
| Cabbage | Transplant outdoors (fall) | Jun 11 – Jul 12 |
| Leaf lettuce | Sow outdoors (spring) | May 4 – Jul 20 |
| Leaf lettuce | Sow outdoors (fall) | Jun 11 – Jul 28 |
| Spinach | Sow outdoors (spring) | Apr 27 – Jun 10 |
| Spinach | Sow outdoors (fall) | Jun 28 – Aug 2 |
| Radishes | Sow outdoors (spring) | May 4 – Jun 24 |
| Radishes | Sow outdoors (fall) | Jun 11 – Aug 12 |
| Kale | Sow outdoors (spring) | May 21 – Jun 10 |
| Kale | Sow outdoors (fall) | Jun 4 – Jul 12 |
| Carrots | Sow outdoors (spring) | Jun 4 – Jul 20 |
| Carrots | Sow outdoors (fall) | May 12 – Jun 27 |
| Garlic | Plant outdoors (fall) | Sep 11 – Oct 12 |
Where these dates come from
ZIP code 84766 is matched to the NOAA station Fremont Indian Sp, UT, 2.1 km away, at 5,920 ft elevation (169 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Fremont Indian Sp, UT (used) | 5,920 ft | Jun 4 | Sep 21 |
| Marysvale, UT | 5,845 ft | May 24 | Sep 25 |
| Kanosh, UT | 4,382 ft | Apr 30 | Oct 19 |
| Richfield Radio Ksvc, UT | 5,285 ft | May 21 | Sep 24 |
Frost dates near Sevier
- Joseph, UT 84739 · last Jun 4, first Sep 21
- Marysvale, UT 84750 · last May 24, first Sep 25
- Elsinore, UT 84724 · last May 21, first Sep 24
- Monroe, UT 84754 · last May 21, first Sep 24
- Annabella, UT 84711 · last May 21, first Sep 24
- Richfield, UT 84701 · last May 21, first Sep 24
- Kanosh, UT 84637 · last Apr 30, first Oct 19
- Glenwood, UT 84730 · last May 21, first Sep 24
Frequently asked questions
- When is the last frost in Sevier, UT?
- For ZIP code 84766, the average last spring frost (32°F) is June 4, based on NOAA 1991-2020 climate normals for the Fremont Indian Sp, UT weather station. There is a 1-in-10 chance of a frost after June 21.
- When is the first frost in Sevier, UT?
- The average first fall frost (32°F) is September 21. There is a 1-in-10 chance of frost by September 6, so tender plants are at risk from that point on.
- How long is the growing season in 84766?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 106 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.