Frost dates for 84511Blanding, UT
The average last spring frost in Blanding is April 28 and the average first fall frost is October 21, giving a typical growing season of about 174 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 28
- Average first fall frost
- Oct 21
- Growing season
- 174 days
Safer after May 16 (1-in-10 risk)
Possible by Oct 6 (1-in-10 risk)
Last frost typically in 184 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) | Apr 26 · May 11 · May 28 | Sep 29 · Oct 10 · Oct 24 | 151 days | 100% |
| Frost / freeze (32°F) | Apr 13 · Apr 28 · May 16 | Oct 6 · Oct 21 · Nov 6 | 174 days | 100% |
| Hard freeze (28°F) | Mar 24 · Apr 14 · May 1 | Oct 16 · Nov 1 · Nov 17 | 201 days | 100% |
Planting calendar for Blanding
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 | Mar 28 – Jun 3 |
| Tomatoes | Transplant outdoors | May 14 – Jul 1 |
| Peppers | Start seeds indoors | Mar 28 – Apr 28 |
| Peppers | Transplant outdoors | May 28 – Jun 28 |
| Eggplant | Start seeds indoors | Apr 14 – May 13 |
| Eggplant | Transplant outdoors | May 28 – Jun 28 |
| Cucumbers | Sow outdoors | May 28 – Jul 11 |
| Summer squash | Sow outdoors | May 14 – Jun 28 |
| Winter squash & pumpkins | Sow outdoors | May 28 – Jun 28 |
| Snap beans | Sow outdoors | May 14 – Aug 3 |
| Sweet corn | Sow outdoors | May 14 – Jul 1 |
| Watermelon & cantaloupe | Sow outdoors | May 28 – Jun 28 |
| Okra | Sow outdoors | May 21 – Jun 13 |
| Peas | Sow outdoors (spring) | Mar 28 – May 13 |
| Potatoes | Plant outdoors (spring) | Mar 28 – May 28 |
| Onions | Start seeds indoors (spring) | Feb 14 – Mar 13 |
| Onions | Transplant outdoors (spring) | Apr 14 – May 13 |
| Broccoli | Start seeds indoors (spring) | Mar 10 – Apr 13 |
| Broccoli | Transplant outdoors (spring) | Apr 14 – May 13 |
| Broccoli | Start seeds indoors (fall) | Jun 21 – Jul 1 |
| Broccoli | Transplant outdoors (fall) | Jul 21 – Aug 1 |
| Cabbage | Start seeds indoors (spring) | Feb 28 – Mar 28 |
| Cabbage | Transplant outdoors (spring) | Mar 28 – Apr 28 |
| Cabbage | Start seeds indoors (fall) | Jun 11 – Jul 11 |
| Cabbage | Transplant outdoors (fall) | Jul 11 – Aug 11 |
| Leaf lettuce | Sow outdoors (spring) | Mar 28 – Jun 13 |
| Leaf lettuce | Sow outdoors (fall) | Jul 11 – Aug 27 |
| Spinach | Sow outdoors (spring) | Mar 21 – May 4 |
| Spinach | Sow outdoors (fall) | Jul 28 – Sep 1 |
| Radishes | Sow outdoors (spring) | Mar 28 – May 18 |
| Radishes | Sow outdoors (fall) | Jul 11 – Sep 11 |
| Kale | Sow outdoors (spring) | Apr 14 – May 4 |
| Kale | Sow outdoors (fall) | Jul 4 – Aug 11 |
| Carrots | Sow outdoors (spring) | Apr 28 – Jun 13 |
| Carrots | Sow outdoors (fall) | Jun 11 – Jul 27 |
| Garlic | Plant outdoors (fall) | Oct 11 – Nov 11 |
Where these dates come from
ZIP code 84511 is matched to the NOAA station Blanding, UT, 3 km away, at 6,032 ft elevation (192 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Blanding, UT (used) | 6,032 ft | Apr 28 | Oct 21 |
| Monticello #2, UT | 7,086 ft | May 17 | Oct 7 |
| Bluff, UT | 4,319 ft | Apr 24 | Oct 13 |
| Monticello 2E, UT | 6,820 ft | May 19 | Oct 2 |
Frost dates near Blanding
- Bluff, UT 84512 · last Apr 24, first Oct 13
- Monticello, UT 84535 · last May 19, first Oct 2
- Aneth, UT 84510 · last Apr 24, first Oct 13
- Montezuma Creek, UT 84534 · last May 2, first Oct 10
- Dove Creek, CO 81324 · last Jun 3, first Sep 25
- Pleasant View, CO 81331 · last May 17, first Oct 9
- Egnar, CO 81325 · last Jun 3, first Sep 25
- Cahone, CO 81320 · last May 17, first Oct 9
Frequently asked questions
- When is the last frost in Blanding, UT?
- For ZIP code 84511, the average last spring frost (32°F) is April 28, based on NOAA 1991-2020 climate normals for the Blanding, UT weather station. There is a 1-in-10 chance of a frost after May 16.
- When is the first frost in Blanding, UT?
- The average first fall frost (32°F) is October 21. There is a 1-in-10 chance of frost by October 6, so tender plants are at risk from that point on.
- How long is the growing season in 84511?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 174 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.