Frost dates for 84069Rush Valley, UT
The average last spring frost in Rush Valley is May 15 and the average first fall frost is October 5, giving a typical growing season of about 142 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 15
- Average first fall frost
- Oct 5
- Growing season
- 142 days
Safer after Jun 4 (1-in-10 risk)
Possible by Sep 22 (1-in-10 risk)
Last frost typically in 200 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 12 · May 30 · Jun 15 | Sep 11 · Sep 25 · Oct 8 | 117 days | 100% |
| Frost / freeze (32°F) | Apr 27 · May 15 · Jun 4 | Sep 22 · Oct 5 · Oct 22 | 142 days | 100% |
| Hard freeze (28°F) | Apr 12 · Apr 30 · May 20 | Oct 1 · Oct 16 · Nov 1 | 169 days | 100% |
Planting calendar for Rush Valley
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 14 – Jun 20 |
| Tomatoes | Transplant outdoors | May 31 – Jun 15 |
| Peppers | Start seeds indoors | Apr 14 – May 15 |
| Peppers | Transplant outdoors | Jun 14 – Jul 15 |
| Eggplant | Start seeds indoors | May 1 – May 30 |
| Eggplant | Transplant outdoors | Jun 14 – Jul 15 |
| Cucumbers | Sow outdoors | Jun 14 – Jun 25 |
| Summer squash | Sow outdoors | May 31 – Jul 15 |
| Winter squash & pumpkins | Sow outdoors | Jun 14 – Jul 15 |
| Snap beans | Sow outdoors | May 31 – Jul 18 |
| Sweet corn | Sow outdoors | May 31 – Jun 15 |
| Watermelon & cantaloupe | Sow outdoors | Jun 14 – Jul 15 |
| Okra | Sow outdoors | Jun 7 – Jun 30 |
| Peas | Sow outdoors (spring) | Apr 14 – May 30 |
| Potatoes | Plant outdoors (spring) | Apr 14 – Jun 14 |
| Onions | Start seeds indoors (spring) | Mar 3 – Mar 30 |
| Onions | Transplant outdoors (spring) | May 1 – May 30 |
| Broccoli | Start seeds indoors (spring) | Mar 27 – Apr 30 |
| Broccoli | Transplant outdoors (spring) | May 1 – May 30 |
| Broccoli | Start seeds indoors (fall) | Jun 5 – Jun 15 |
| Broccoli | Transplant outdoors (fall) | Jul 5 – Jul 16 |
| Cabbage | Start seeds indoors (spring) | Mar 17 – Apr 14 |
| Cabbage | Transplant outdoors (spring) | Apr 14 – May 15 |
| Cabbage | Start seeds indoors (fall) | May 26 – Jun 25 |
| Cabbage | Transplant outdoors (fall) | Jun 25 – Jul 26 |
| Leaf lettuce | Sow outdoors (spring) | Apr 14 – Jun 30 |
| Leaf lettuce | Sow outdoors (fall) | Jun 25 – Aug 11 |
| Spinach | Sow outdoors (spring) | Apr 7 – May 21 |
| Spinach | Sow outdoors (fall) | Jul 12 – Aug 16 |
| Radishes | Sow outdoors (spring) | Apr 14 – Jun 4 |
| Radishes | Sow outdoors (fall) | Jun 25 – Aug 26 |
| Kale | Sow outdoors (spring) | May 1 – May 21 |
| Kale | Sow outdoors (fall) | Jun 18 – Jul 26 |
| Carrots | Sow outdoors (spring) | May 15 – Jun 30 |
| Carrots | Sow outdoors (fall) | May 26 – Jul 11 |
| Garlic | Plant outdoors (fall) | Sep 25 – Oct 26 |
Where these dates come from
ZIP code 84069 is matched to the NOAA station Johnson Pass, UT, 12.5 km away, at 5,580 ft elevation (409 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Johnson Pass, UT (used) | 5,580 ft | May 15 | Oct 5 |
| Tooele, UT | 4,944 ft | May 2 | Oct 16 |
| Grantsville 2W, UT | 4,550 ft | May 2 | Oct 14 |
| Vernon, UT | 5,471 ft | Jun 1 | Sep 20 |
Frost dates near Rush Valley
- Stockton, UT 84071 · last May 2, first Oct 16
- Dugway, UT 84022 · last May 11, first Oct 2
- Tooele, UT 84074 · last May 2, first Oct 16
- Grantsville, UT 84029 · last May 2, first Oct 14
- Vernon, UT 84080 · last Jun 1, first Sep 20
- Cedar Valley, UT 84013 · last Jun 2, first Sep 16
- Bingham Canyon, UT 84006 · last May 2, first Oct 16
- Eagle Mountain, UT 84005 · last Jun 2, first Sep 16
Frequently asked questions
- When is the last frost in Rush Valley, UT?
- For ZIP code 84069, the average last spring frost (32°F) is May 15, based on NOAA 1991-2020 climate normals for the Johnson Pass, UT weather station. There is a 1-in-10 chance of a frost after June 4.
- When is the first frost in Rush Valley, UT?
- The average first fall frost (32°F) is October 5. There is a 1-in-10 chance of frost by September 22, so tender plants are at risk from that point on.
- How long is the growing season in 84069?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 142 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.