Frost dates for 84063Randlett, UT
The average last spring frost in Randlett is May 2 and the average first fall frost is October 3, giving a typical growing season of about 152 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 2
- Average first fall frost
- Oct 3
- Growing season
- 152 days
Safer after May 16 (1-in-10 risk)
Possible by Sep 21 (1-in-10 risk)
Last frost typically in 181 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 2 · May 16 · Jun 2 | Sep 12 · Sep 25 · Oct 5 | 131 days | 100% |
| Frost / freeze (32°F) | Apr 19 · May 2 · May 16 | Sep 21 · Oct 3 · Oct 16 | 152 days | 100% |
| Hard freeze (28°F) | Apr 5 · Apr 19 · May 4 | Sep 29 · Oct 13 · Oct 25 | 173 days | 100% |
Planting calendar for Randlett
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 1 – Jun 7 |
| Tomatoes | Transplant outdoors | May 18 – Jun 13 |
| Peppers | Start seeds indoors | Apr 1 – May 2 |
| Peppers | Transplant outdoors | Jun 1 – Jul 2 |
| Eggplant | Start seeds indoors | Apr 18 – May 17 |
| Eggplant | Transplant outdoors | Jun 1 – Jul 2 |
| Cucumbers | Sow outdoors | Jun 1 – Jun 23 |
| Summer squash | Sow outdoors | May 18 – Jul 2 |
| Winter squash & pumpkins | Sow outdoors | Jun 1 – Jul 2 |
| Snap beans | Sow outdoors | May 18 – Jul 16 |
| Sweet corn | Sow outdoors | May 18 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 1 – Jul 2 |
| Okra | Sow outdoors | May 25 – Jun 17 |
| Peas | Sow outdoors (spring) | Apr 1 – May 17 |
| Potatoes | Plant outdoors (spring) | Apr 1 – Jun 1 |
| Onions | Start seeds indoors (spring) | Feb 18 – Mar 17 |
| Onions | Transplant outdoors (spring) | Apr 18 – May 17 |
| Broccoli | Start seeds indoors (spring) | Mar 14 – Apr 17 |
| Broccoli | Transplant outdoors (spring) | Apr 18 – May 17 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 4 – Apr 1 |
| Cabbage | Transplant outdoors (spring) | Apr 1 – May 2 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 1 – Jun 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Mar 25 – May 8 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 1 – May 22 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | Apr 18 – May 8 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 2 – Jun 17 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 84063 is matched to the NOAA station Ouray 4Ne, UT, 11.9 km away, at 4,674 ft elevation (188 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Ouray 4Ne, UT (used) | 4,674 ft | May 2 | Oct 3 |
| Ft Duchesne, UT | 5,052 ft | May 19 | Oct 2 |
| Roosevelt Radio, UT | 5,014 ft | May 23 | Sep 22 |
| Myton, UT | 5,085 ft | May 7 | Oct 5 |
Frost dates near Randlett
- Fort Duchesne, UT 84026 · last May 19, first Oct 2
- Lapoint, UT 84039 · last May 7, first Oct 6
- Roosevelt, UT 84066 · last May 23, first Sep 22
- Tridell, UT 84076 · last May 19, first Sep 29
- Myton, UT 84052 · last May 7, first Oct 5
- Vernal, UT 84078 · last May 7, first Oct 6
- Whiterocks, UT 84085 · last May 19, first Sep 29
- Neola, UT 84053 · last May 19, first Sep 29
Frequently asked questions
- When is the last frost in Randlett, UT?
- For ZIP code 84063, the average last spring frost (32°F) is May 2, based on NOAA 1991-2020 climate normals for the Ouray 4Ne, UT weather station. There is a 1-in-10 chance of a frost after May 16.
- When is the first frost in Randlett, UT?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 21, so tender plants are at risk from that point on.
- How long is the growing season in 84063?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 152 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.