Frost dates for 84023Dutch John, UT
The average last spring frost in Dutch John is May 26 and the average first fall frost is September 23, giving a typical growing season of about 120 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 26
- Average first fall frost
- Sep 23
- Growing season
- 120 days
Safer after Jun 10 (1-in-10 risk)
Possible by Sep 9 (1-in-10 risk)
Last frost typically in 211 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 26 · Jun 9 · Jun 25 | Sep 1 · Sep 14 · Sep 26 | 95 days | 100% |
| Frost / freeze (32°F) | May 9 · May 26 · Jun 10 | Sep 9 · Sep 23 · Oct 4 | 120 days | 100% |
| Hard freeze (28°F) | Apr 26 · May 10 · May 29 | Sep 19 · Oct 3 · Oct 18 | 144 days | 100% |
Planting calendar for Dutch John
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 25 – Jul 1 |
| Tomatoes | Transplant outdoors | Jun 11 – Jun 3 |
| Peppers | Start seeds indoors | Apr 25 – May 26 |
| Peppers | Transplant outdoors | Jun 25 – Jul 26 |
| Eggplant | Start seeds indoors | May 12 – Jun 10 |
| Eggplant | Transplant outdoors | Jun 25 – Jul 26 |
| Cucumbers | Sow outdoors | Jun 25 – Jun 13 |
| Summer squash | Sow outdoors | Jun 11 – Jul 26 |
| Winter squash & pumpkins | Sow outdoors | Jun 25 – Jul 26 |
| Snap beans | Sow outdoors | Jun 11 – Jul 6 |
| Sweet corn | Sow outdoors | Jun 11 – Jun 3 |
| Watermelon & cantaloupe | Sow outdoors | Jun 25 – Jul 26 |
| Okra | Sow outdoors | Jun 18 – Jul 11 |
| Peas | Sow outdoors (spring) | Apr 25 – Jun 10 |
| Potatoes | Plant outdoors (spring) | Apr 25 – Jun 25 |
| Onions | Start seeds indoors (spring) | Mar 14 – Apr 10 |
| Onions | Transplant outdoors (spring) | May 12 – Jun 10 |
| Broccoli | Start seeds indoors (spring) | Apr 7 – May 11 |
| Broccoli | Transplant outdoors (spring) | May 12 – Jun 10 |
| Broccoli | Start seeds indoors (fall) | May 24 – Jun 3 |
| Broccoli | Transplant outdoors (fall) | Jun 23 – Jul 4 |
| Cabbage | Start seeds indoors (spring) | Mar 28 – Apr 25 |
| Cabbage | Transplant outdoors (spring) | Apr 25 – May 26 |
| Cabbage | Start seeds indoors (fall) | May 14 – Jun 13 |
| Cabbage | Transplant outdoors (fall) | Jun 13 – Jul 14 |
| Leaf lettuce | Sow outdoors (spring) | Apr 25 – Jul 11 |
| Leaf lettuce | Sow outdoors (fall) | Jun 13 – Jul 30 |
| Spinach | Sow outdoors (spring) | Apr 18 – Jun 1 |
| Spinach | Sow outdoors (fall) | Jun 30 – Aug 4 |
| Radishes | Sow outdoors (spring) | Apr 25 – Jun 15 |
| Radishes | Sow outdoors (fall) | Jun 13 – Aug 14 |
| Kale | Sow outdoors (spring) | May 12 – Jun 1 |
| Kale | Sow outdoors (fall) | Jun 6 – Jul 14 |
| Carrots | Sow outdoors (spring) | May 26 – Jul 11 |
| Carrots | Sow outdoors (fall) | May 14 – Jun 29 |
| Garlic | Plant outdoors (fall) | Sep 13 – Oct 14 |
Where these dates come from
ZIP code 84023 is matched to the NOAA station Flaming Gorge, UT, 1.8 km away, at 6,244 ft elevation (124 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Flaming Gorge, UT (used) | 6,244 ft | May 26 | Sep 23 |
| Jarvie Rch, UT | 5,454 ft | May 19 | Sep 28 |
| Manila, UT | 6,393 ft | May 22 | Sep 29 |
| Buckboard Marina, WY | 6,080 ft | May 24 | Sep 23 |
Frost dates near Dutch John
- Manila, UT 84046 · last May 22, first Sep 29
- Mc Kinnon, WY 82938 · last May 22, first Sep 29
- Vernal, UT 84079 · last May 7, first Oct 6
- Jensen, UT 84035 · last May 20, first Sep 25
- Tridell, UT 84076 · last May 19, first Sep 29
- Green River, WY 82935 · last May 24, first Sep 22
- Lonetree, WY 82936 · last May 25, first Sep 27
- Lapoint, UT 84039 · last May 7, first Oct 6
Frequently asked questions
- When is the last frost in Dutch John, UT?
- For ZIP code 84023, the average last spring frost (32°F) is May 26, based on NOAA 1991-2020 climate normals for the Flaming Gorge, UT weather station. There is a 1-in-10 chance of a frost after June 10.
- When is the first frost in Dutch John, UT?
- The average first fall frost (32°F) is September 23. There is a 1-in-10 chance of frost by September 9, so tender plants are at risk from that point on.
- How long is the growing season in 84023?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 120 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.