Frost dates for 84022Dugway, UT
The average last spring frost in Dugway is May 11 and the average first fall frost is October 2, giving a typical growing season of about 143 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 11
- Average first fall frost
- Oct 2
- Growing season
- 143 days
Safer after May 29 (1-in-10 risk)
Possible by Sep 19 (1-in-10 risk)
Last frost typically in 197 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 8 · May 23 · Jun 8 | Sep 10 · Sep 24 · Oct 5 | 122 days | 100% |
| Frost / freeze (32°F) | Apr 25 · May 11 · May 29 | Sep 19 · Oct 2 · Oct 15 | 143 days | 100% |
| Hard freeze (28°F) | Apr 9 · Apr 28 · May 17 | Sep 28 · Oct 12 · Oct 25 | 164 days | 100% |
Planting calendar for Dugway
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 10 – Jun 16 |
| Tomatoes | Transplant outdoors | May 27 – Jun 12 |
| Peppers | Start seeds indoors | Apr 10 – May 11 |
| Peppers | Transplant outdoors | Jun 10 – Jul 11 |
| Eggplant | Start seeds indoors | Apr 27 – May 26 |
| Eggplant | Transplant outdoors | Jun 10 – Jul 11 |
| Cucumbers | Sow outdoors | Jun 10 – Jun 22 |
| Summer squash | Sow outdoors | May 27 – Jul 11 |
| Winter squash & pumpkins | Sow outdoors | Jun 10 – Jul 11 |
| Snap beans | Sow outdoors | May 27 – Jul 15 |
| Sweet corn | Sow outdoors | May 27 – Jun 12 |
| Watermelon & cantaloupe | Sow outdoors | Jun 10 – Jul 11 |
| Okra | Sow outdoors | Jun 3 – Jun 26 |
| Peas | Sow outdoors (spring) | Apr 10 – May 26 |
| Potatoes | Plant outdoors (spring) | Apr 10 – Jun 10 |
| Onions | Start seeds indoors (spring) | Feb 27 – Mar 26 |
| Onions | Transplant outdoors (spring) | Apr 27 – May 26 |
| Broccoli | Start seeds indoors (spring) | Mar 23 – Apr 26 |
| Broccoli | Transplant outdoors (spring) | Apr 27 – May 26 |
| Broccoli | Start seeds indoors (fall) | Jun 2 – Jun 12 |
| Broccoli | Transplant outdoors (fall) | Jul 2 – Jul 13 |
| Cabbage | Start seeds indoors (spring) | Mar 13 – Apr 10 |
| Cabbage | Transplant outdoors (spring) | Apr 10 – May 11 |
| Cabbage | Start seeds indoors (fall) | May 23 – Jun 22 |
| Cabbage | Transplant outdoors (fall) | Jun 22 – Jul 23 |
| Leaf lettuce | Sow outdoors (spring) | Apr 10 – Jun 26 |
| Leaf lettuce | Sow outdoors (fall) | Jun 22 – Aug 8 |
| Spinach | Sow outdoors (spring) | Apr 3 – May 17 |
| Spinach | Sow outdoors (fall) | Jul 9 – Aug 13 |
| Radishes | Sow outdoors (spring) | Apr 10 – May 31 |
| Radishes | Sow outdoors (fall) | Jun 22 – Aug 23 |
| Kale | Sow outdoors (spring) | Apr 27 – May 17 |
| Kale | Sow outdoors (fall) | Jun 15 – Jul 23 |
| Carrots | Sow outdoors (spring) | May 11 – Jun 26 |
| Carrots | Sow outdoors (fall) | May 23 – Jul 8 |
| Garlic | Plant outdoors (fall) | Sep 22 – Oct 23 |
Where these dates come from
ZIP code 84022 is matched to the NOAA station Dugway, UT, 21.9 km away, at 4,345 ft elevation (383 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dugway, UT (used) | 4,345 ft | May 11 | Oct 2 |
| Johnson Pass, UT | 5,580 ft | May 15 | Oct 5 |
| Vernon, UT | 5,471 ft | Jun 1 | Sep 20 |
| Grantsville 2W, UT | 4,550 ft | May 2 | Oct 14 |
Frost dates near Dugway
- Rush Valley, UT 84069 · last May 15, first Oct 5
- Vernon, UT 84080 · last Jun 1, first Sep 20
- Stockton, UT 84071 · last May 2, first Oct 16
- Grantsville, UT 84029 · last May 2, first Oct 14
- Tooele, UT 84074 · last May 2, first Oct 16
- Cedar Valley, UT 84013 · last Jun 2, first Sep 16
- Bingham Canyon, UT 84006 · last May 2, first Oct 16
- Eureka, UT 84628 · last Jun 1, first Sep 20
Frequently asked questions
- When is the last frost in Dugway, UT?
- For ZIP code 84022, the average last spring frost (32°F) is May 11, based on NOAA 1991-2020 climate normals for the Dugway, UT weather station. There is a 1-in-10 chance of a frost after May 29.
- When is the first frost in Dugway, UT?
- The average first fall frost (32°F) is October 2. There is a 1-in-10 chance of frost by September 19, so tender plants are at risk from that point on.
- How long is the growing season in 84022?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 143 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.