Frost dates for 84512Bluff, UT
The average last spring frost in Bluff is April 24 and the average first fall frost is October 13, giving a typical growing season of about 172 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 24
- Average first fall frost
- Oct 13
- Growing season
- 172 days
Safer after May 9 (1-in-10 risk)
Possible by Oct 1 (1-in-10 risk)
Last frost typically in 178 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 23 · May 5 · May 21 | Sep 24 · Oct 4 · Oct 18 | 151 days | 100% |
| Frost / freeze (32°F) | Apr 8 · Apr 24 · May 9 | Oct 1 · Oct 13 · Oct 28 | 172 days | 100% |
| Hard freeze (28°F) | Mar 25 · Apr 9 · Apr 26 | Oct 7 · Oct 23 · Nov 5 | 196 days | 100% |
Planting calendar for Bluff
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 24 – May 30 |
| Tomatoes | Transplant outdoors | May 10 – Jun 23 |
| Peppers | Start seeds indoors | Mar 24 – Apr 24 |
| Peppers | Transplant outdoors | May 24 – Jun 24 |
| Eggplant | Start seeds indoors | Apr 10 – May 9 |
| Eggplant | Transplant outdoors | May 24 – Jun 24 |
| Cucumbers | Sow outdoors | May 24 – Jul 3 |
| Summer squash | Sow outdoors | May 10 – Jun 24 |
| Winter squash & pumpkins | Sow outdoors | May 24 – Jun 24 |
| Snap beans | Sow outdoors | May 10 – Jul 26 |
| Sweet corn | Sow outdoors | May 10 – Jun 23 |
| Watermelon & cantaloupe | Sow outdoors | May 24 – Jun 24 |
| Okra | Sow outdoors | May 17 – Jun 9 |
| Peas | Sow outdoors (spring) | Mar 24 – May 9 |
| Potatoes | Plant outdoors (spring) | Mar 24 – May 24 |
| Onions | Start seeds indoors (spring) | Feb 10 – Mar 9 |
| Onions | Transplant outdoors (spring) | Apr 10 – May 9 |
| Broccoli | Start seeds indoors (spring) | Mar 6 – Apr 9 |
| Broccoli | Transplant outdoors (spring) | Apr 10 – May 9 |
| Broccoli | Start seeds indoors (fall) | Jun 13 – Jun 23 |
| Broccoli | Transplant outdoors (fall) | Jul 13 – Jul 24 |
| Cabbage | Start seeds indoors (spring) | Feb 24 – Mar 24 |
| Cabbage | Transplant outdoors (spring) | Mar 24 – Apr 24 |
| Cabbage | Start seeds indoors (fall) | Jun 3 – Jul 3 |
| Cabbage | Transplant outdoors (fall) | Jul 3 – Aug 3 |
| Leaf lettuce | Sow outdoors (spring) | Mar 24 – Jun 9 |
| Leaf lettuce | Sow outdoors (fall) | Jul 3 – Aug 19 |
| Spinach | Sow outdoors (spring) | Mar 17 – Apr 30 |
| Spinach | Sow outdoors (fall) | Jul 20 – Aug 24 |
| Radishes | Sow outdoors (spring) | Mar 24 – May 14 |
| Radishes | Sow outdoors (fall) | Jul 3 – Sep 3 |
| Kale | Sow outdoors (spring) | Apr 10 – Apr 30 |
| Kale | Sow outdoors (fall) | Jun 26 – Aug 3 |
| Carrots | Sow outdoors (spring) | Apr 24 – Jun 9 |
| Carrots | Sow outdoors (fall) | Jun 3 – Jul 19 |
| Garlic | Plant outdoors (fall) | Oct 3 – Nov 3 |
Where these dates come from
ZIP code 84512 is matched to the NOAA station Bluff, UT, 0.5 km away, at 4,319 ft elevation (5 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bluff, UT (used) | 4,319 ft | Apr 24 | Oct 13 |
| Mexican Hat, UT | 4,109 ft | Apr 11 | Oct 30 |
| Valley Of The Gods, UT | 5,287 ft | Mar 29 | Nov 6 |
| Blanding, UT | 6,032 ft | Apr 28 | Oct 21 |
Frost dates near Bluff
- Aneth, UT 84510 · last Apr 24, first Oct 13
- Blanding, UT 84511 · last Apr 28, first Oct 21
- Montezuma Creek, UT 84534 · last May 2, first Oct 10
- Mexican Hat, UT 84531 · last Mar 29, first Nov 6
- Teec Nos Pos, AZ 86514 · last Apr 11, first Nov 1
- Dennehotso, AZ 86535 · last Apr 10, first Nov 1
- Rock Point, AZ 86545 · last Apr 11, first Nov 1
- Pleasant View, CO 81331 · last May 17, first Oct 9
Frequently asked questions
- When is the last frost in Bluff, UT?
- For ZIP code 84512, the average last spring frost (32°F) is April 24, based on NOAA 1991-2020 climate normals for the Bluff, UT weather station. There is a 1-in-10 chance of a frost after May 9.
- When is the first frost in Bluff, UT?
- The average first fall frost (32°F) is October 13. There is a 1-in-10 chance of frost by October 1, so tender plants are at risk from that point on.
- How long is the growing season in 84512?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 172 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.