Frost dates for 84035Jensen, UT
The average last spring frost in Jensen is May 20 and the average first fall frost is September 25, giving a typical growing season of about 126 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 20
- Average first fall frost
- Sep 25
- Growing season
- 126 days
Safer after Jun 5 (1-in-10 risk)
Possible by Sep 11 (1-in-10 risk)
Last frost typically in 205 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 19 · Jun 3 · Jun 19 | Sep 1 · Sep 14 · Sep 26 | 101 days | 100% |
| Frost / freeze (32°F) | May 5 · May 20 · Jun 5 | Sep 11 · Sep 25 · Oct 5 | 126 days | 100% |
| Hard freeze (28°F) | Apr 23 · May 6 · May 21 | Sep 22 · Oct 3 · Oct 16 | 149 days | 100% |
Planting calendar for Jensen
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 19 – Jun 25 |
| Tomatoes | Transplant outdoors | Jun 5 – Jun 5 |
| Peppers | Start seeds indoors | Apr 19 – May 20 |
| Peppers | Transplant outdoors | Jun 19 – Jul 20 |
| Eggplant | Start seeds indoors | May 6 – Jun 4 |
| Eggplant | Transplant outdoors | Jun 19 – Jul 20 |
| Cucumbers | Sow outdoors | Jun 19 – Jun 15 |
| Summer squash | Sow outdoors | Jun 5 – Jul 20 |
| Winter squash & pumpkins | Sow outdoors | Jun 19 – Jul 20 |
| Snap beans | Sow outdoors | Jun 5 – Jul 8 |
| Sweet corn | Sow outdoors | Jun 5 – Jun 5 |
| Watermelon & cantaloupe | Sow outdoors | Jun 19 – Jul 20 |
| Okra | Sow outdoors | Jun 12 – Jul 5 |
| Peas | Sow outdoors (spring) | Apr 19 – Jun 4 |
| Potatoes | Plant outdoors (spring) | Apr 19 – Jun 19 |
| Onions | Start seeds indoors (spring) | Mar 8 – Apr 4 |
| Onions | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (spring) | Apr 1 – May 5 |
| Broccoli | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (fall) | May 26 – Jun 5 |
| Broccoli | Transplant outdoors (fall) | Jun 25 – Jul 6 |
| Cabbage | Start seeds indoors (spring) | Mar 22 – Apr 19 |
| Cabbage | Transplant outdoors (spring) | Apr 19 – May 20 |
| Cabbage | Start seeds indoors (fall) | May 16 – Jun 15 |
| Cabbage | Transplant outdoors (fall) | Jun 15 – Jul 16 |
| Leaf lettuce | Sow outdoors (spring) | Apr 19 – Jul 5 |
| Leaf lettuce | Sow outdoors (fall) | Jun 15 – Aug 1 |
| Spinach | Sow outdoors (spring) | Apr 12 – May 26 |
| Spinach | Sow outdoors (fall) | Jul 2 – Aug 6 |
| Radishes | Sow outdoors (spring) | Apr 19 – Jun 9 |
| Radishes | Sow outdoors (fall) | Jun 15 – Aug 16 |
| Kale | Sow outdoors (spring) | May 6 – May 26 |
| Kale | Sow outdoors (fall) | Jun 8 – Jul 16 |
| Carrots | Sow outdoors (spring) | May 20 – Jul 5 |
| Carrots | Sow outdoors (fall) | May 16 – Jul 1 |
| Garlic | Plant outdoors (fall) | Sep 15 – Oct 16 |
Where these dates come from
ZIP code 84035 is matched to the NOAA station Jensen, UT, 2 km away, at 4,736 ft elevation (54 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Jensen, UT (used) | 4,736 ft | May 20 | Sep 25 |
| Dinosaur Nm-Quarry Area, UT | 4,802 ft | May 1 | Oct 6 |
| Vernal Municipal Ap, UT | 5,260 ft | May 6 | Oct 7 |
| Vernal, UT | 5,345 ft | May 7 | Oct 6 |
Frost dates near Jensen
- Vernal, UT 84079 · last May 7, first Oct 6
- Dinosaur, CO 81610 · last May 2, first Oct 14
- Randlett, UT 84063 · last May 2, first Oct 3
- Lapoint, UT 84039 · last May 7, first Oct 6
- Tridell, UT 84076 · last May 19, first Sep 29
- Bonanza, UT 84008 · last May 15, first Oct 1
- Fort Duchesne, UT 84026 · last May 19, first Oct 2
- Whiterocks, UT 84085 · last May 19, first Sep 29
Frequently asked questions
- When is the last frost in Jensen, UT?
- For ZIP code 84035, the average last spring frost (32°F) is May 20, based on NOAA 1991-2020 climate normals for the Jensen, UT weather station. There is a 1-in-10 chance of a frost after June 5.
- When is the first frost in Jensen, UT?
- The average first fall frost (32°F) is September 25. There is a 1-in-10 chance of frost by September 11, so tender plants are at risk from that point on.
- How long is the growing season in 84035?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 126 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.