Frost dates for 84636Holden, UT
The average last spring frost in Holden is May 4 and the average first fall frost is October 14, giving a typical growing season of about 160 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 4
- Average first fall frost
- Oct 14
- Growing season
- 160 days
Safer after May 26 (1-in-10 risk)
Possible by Sep 30 (1-in-10 risk)
Last frost typically in 189 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 1 · May 20 · Jun 8 | Sep 20 · Oct 2 · Oct 17 | 135 days | 100% |
| Frost / freeze (32°F) | Apr 18 · May 4 · May 26 | Sep 30 · Oct 14 · Oct 28 | 160 days | 100% |
| Hard freeze (28°F) | Mar 30 · Apr 19 · May 9 | Oct 9 · Oct 25 · Nov 8 | 186 days | 100% |
Planting calendar for Holden
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 3 – Jun 9 |
| Tomatoes | Transplant outdoors | May 20 – Jun 24 |
| Peppers | Start seeds indoors | Apr 3 – May 4 |
| Peppers | Transplant outdoors | Jun 3 – Jul 4 |
| Eggplant | Start seeds indoors | Apr 20 – May 19 |
| Eggplant | Transplant outdoors | Jun 3 – Jul 4 |
| Cucumbers | Sow outdoors | Jun 3 – Jul 4 |
| Summer squash | Sow outdoors | May 20 – Jul 4 |
| Winter squash & pumpkins | Sow outdoors | Jun 3 – Jul 4 |
| Snap beans | Sow outdoors | May 20 – Jul 27 |
| Sweet corn | Sow outdoors | May 20 – Jun 24 |
| Watermelon & cantaloupe | Sow outdoors | Jun 3 – Jul 4 |
| Okra | Sow outdoors | May 27 – Jun 19 |
| Peas | Sow outdoors (spring) | Apr 3 – May 19 |
| Potatoes | Plant outdoors (spring) | Apr 3 – Jun 3 |
| Onions | Start seeds indoors (spring) | Feb 20 – Mar 19 |
| Onions | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (spring) | Mar 16 – Apr 19 |
| Broccoli | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (fall) | Jun 14 – Jun 24 |
| Broccoli | Transplant outdoors (fall) | Jul 14 – Jul 25 |
| Cabbage | Start seeds indoors (spring) | Mar 6 – Apr 3 |
| Cabbage | Transplant outdoors (spring) | Apr 3 – May 4 |
| Cabbage | Start seeds indoors (fall) | Jun 4 – Jul 4 |
| Cabbage | Transplant outdoors (fall) | Jul 4 – Aug 4 |
| Leaf lettuce | Sow outdoors (spring) | Apr 3 – Jun 19 |
| Leaf lettuce | Sow outdoors (fall) | Jul 4 – Aug 20 |
| Spinach | Sow outdoors (spring) | Mar 27 – May 10 |
| Spinach | Sow outdoors (fall) | Jul 21 – Aug 25 |
| Radishes | Sow outdoors (spring) | Apr 3 – May 24 |
| Radishes | Sow outdoors (fall) | Jul 4 – Sep 4 |
| Kale | Sow outdoors (spring) | Apr 20 – May 10 |
| Kale | Sow outdoors (fall) | Jun 27 – Aug 4 |
| Carrots | Sow outdoors (spring) | May 4 – Jun 19 |
| Carrots | Sow outdoors (fall) | Jun 4 – Jul 20 |
| Garlic | Plant outdoors (fall) | Oct 4 – Nov 4 |
Where these dates come from
ZIP code 84636 is matched to the NOAA station Fillmore, UT, 15.5 km away, at 5,127 ft elevation (114 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Fillmore, UT (used) | 5,127 ft | May 4 | Oct 14 |
| Scipio, UT | 5,314 ft | May 22 | Sep 25 |
| Oak City, UT | 5,095 ft | May 2 | Oct 13 |
| Kanosh, UT | 4,382 ft | Apr 30 | Oct 19 |
Frost dates near Holden
- Fillmore, UT 84631 · last May 4, first Oct 14
- Scipio, UT 84656 · last May 22, first Sep 25
- Meadow, UT 84644 · last May 4, first Oct 14
- Oak City, UT 84649 · last May 2, first Oct 13
- Kanosh, UT 84637 · last Apr 30, first Oct 19
- Aurora, UT 84620 · last May 21, first Sep 24
- Delta, UT 84624 · last May 16, first Sep 29
- Redmond, UT 84652 · last May 21, first Sep 24
Frequently asked questions
- When is the last frost in Holden, UT?
- For ZIP code 84636, the average last spring frost (32°F) is May 4, based on NOAA 1991-2020 climate normals for the Fillmore, UT weather station. There is a 1-in-10 chance of a frost after May 26.
- When is the first frost in Holden, UT?
- The average first fall frost (32°F) is October 14. There is a 1-in-10 chance of frost by September 30, so tender plants are at risk from that point on.
- How long is the growing season in 84636?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 160 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.