Frost dates for 84743Kingston, UT
The average last spring frost in Kingston is May 23 and the average first fall frost is September 27, giving a typical growing season of about 125 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 23
- Average first fall frost
- Sep 27
- Growing season
- 125 days
Safer after Jun 13 (1-in-10 risk)
Possible by Sep 12 (1-in-10 risk)
Last frost typically in 208 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 20 · Jun 5 · Jun 22 | Sep 4 · Sep 20 · Oct 1 | 102 days | 100% |
| Frost / freeze (32°F) | May 4 · May 23 · Jun 13 | Sep 12 · Sep 27 · Oct 8 | 125 days | 100% |
| Hard freeze (28°F) | Apr 20 · May 8 · Jun 3 | Sep 22 · Oct 5 · Oct 19 | 149 days | 100% |
Planting calendar for Kingston
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 22 – Jun 28 |
| Tomatoes | Transplant outdoors | Jun 8 – Jun 7 |
| Peppers | Start seeds indoors | Apr 22 – May 23 |
| Peppers | Transplant outdoors | Jun 22 – Jul 23 |
| Eggplant | Start seeds indoors | May 9 – Jun 7 |
| Eggplant | Transplant outdoors | Jun 22 – Jul 23 |
| Cucumbers | Sow outdoors | Jun 22 – Jun 17 |
| Summer squash | Sow outdoors | Jun 8 – Jul 23 |
| Winter squash & pumpkins | Sow outdoors | Jun 22 – Jul 23 |
| Snap beans | Sow outdoors | Jun 8 – Jul 10 |
| Sweet corn | Sow outdoors | Jun 8 – Jun 7 |
| Watermelon & cantaloupe | Sow outdoors | Jun 22 – Jul 23 |
| Okra | Sow outdoors | Jun 15 – Jul 8 |
| Peas | Sow outdoors (spring) | Apr 22 – Jun 7 |
| Potatoes | Plant outdoors (spring) | Apr 22 – Jun 22 |
| Onions | Start seeds indoors (spring) | Mar 11 – Apr 7 |
| Onions | Transplant outdoors (spring) | May 9 – Jun 7 |
| Broccoli | Start seeds indoors (spring) | Apr 4 – May 8 |
| Broccoli | Transplant outdoors (spring) | May 9 – Jun 7 |
| Broccoli | Start seeds indoors (fall) | May 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Mar 25 – Apr 22 |
| Cabbage | Transplant outdoors (spring) | Apr 22 – May 23 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | Apr 22 – Jul 8 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 15 – May 29 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | Apr 22 – Jun 12 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 9 – May 29 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | May 23 – Jul 8 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 84743 is matched to the NOAA station Circleville, UT, 8.2 km away, at 6,050 ft elevation (39 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Circleville, UT (used) | 6,050 ft | May 23 | Sep 27 |
| Angle, UT | 6,410 ft | Jun 17 | Sep 12 |
| Beaver Canyon Pwr House, UT | 7,275 ft | Jun 1 | Sep 28 |
| Marysvale, UT | 5,845 ft | May 24 | Sep 25 |
Frost dates near Kingston
- Junction, UT 84740 · last May 23, first Sep 27
- Circleville, UT 84723 · last May 23, first Sep 27
- Antimony, UT 84712 · last Jun 17, first Sep 12
- Marysvale, UT 84750 · last May 24, first Sep 25
- Greenwich, UT 84732 · last Jun 6, first Sep 21
- Beaver, UT 84713 · last May 23, first Sep 27
- Sevier, UT 84766 · last Jun 4, first Sep 21
- Koosharem, UT 84744 · last Jun 6, first Sep 21
Frequently asked questions
- When is the last frost in Kingston, UT?
- For ZIP code 84743, the average last spring frost (32°F) is May 23, based on NOAA 1991-2020 climate normals for the Circleville, UT weather station. There is a 1-in-10 chance of a frost after June 13.
- When is the first frost in Kingston, UT?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 12, so tender plants are at risk from that point on.
- How long is the growing season in 84743?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 125 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.