Frost dates for 86054Shonto, AZ
The average last spring frost in Shonto is May 7 and the average first fall frost is October 15, giving a typical growing season of about 159 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 7
- Average first fall frost
- Oct 15
- Growing season
- 159 days
Safer after May 26 (1-in-10 risk)
Possible by Sep 30 (1-in-10 risk)
Last frost typically in 192 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 3 · May 20 · Jun 6 | Sep 21 · Oct 6 · Oct 22 | 136 days | 100% |
| Frost / freeze (32°F) | Apr 23 · May 7 · May 26 | Sep 30 · Oct 15 · Nov 1 | 159 days | 100% |
| Hard freeze (28°F) | Apr 11 · Apr 28 · May 12 | Oct 7 · Oct 27 · Nov 13 | 183 days | 100% |
Planting calendar for Shonto
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 6 – Jun 12 |
| Tomatoes | Transplant outdoors | May 23 – Jun 25 |
| Peppers | Start seeds indoors | Apr 6 – May 7 |
| Peppers | Transplant outdoors | Jun 6 – Jul 7 |
| Eggplant | Start seeds indoors | Apr 23 – May 22 |
| Eggplant | Transplant outdoors | Jun 6 – Jul 7 |
| Cucumbers | Sow outdoors | Jun 6 – Jul 5 |
| Summer squash | Sow outdoors | May 23 – Jul 7 |
| Winter squash & pumpkins | Sow outdoors | Jun 6 – Jul 7 |
| Snap beans | Sow outdoors | May 23 – Jul 28 |
| Sweet corn | Sow outdoors | May 23 – Jun 25 |
| Watermelon & cantaloupe | Sow outdoors | Jun 6 – Jul 7 |
| Okra | Sow outdoors | May 30 – Jun 22 |
| Peas | Sow outdoors (spring) | Apr 6 – May 22 |
| Potatoes | Plant outdoors (spring) | Apr 6 – Jun 6 |
| Onions | Start seeds indoors (spring) | Feb 23 – Mar 22 |
| Onions | Transplant outdoors (spring) | Apr 23 – May 22 |
| Broccoli | Start seeds indoors (spring) | Mar 19 – Apr 22 |
| Broccoli | Transplant outdoors (spring) | Apr 23 – May 22 |
| Broccoli | Start seeds indoors (fall) | Jun 15 – Jun 25 |
| Broccoli | Transplant outdoors (fall) | Jul 15 – Jul 26 |
| Cabbage | Start seeds indoors (spring) | Mar 9 – Apr 6 |
| Cabbage | Transplant outdoors (spring) | Apr 6 – May 7 |
| Cabbage | Start seeds indoors (fall) | Jun 5 – Jul 5 |
| Cabbage | Transplant outdoors (fall) | Jul 5 – Aug 5 |
| Leaf lettuce | Sow outdoors (spring) | Apr 6 – Jun 22 |
| Leaf lettuce | Sow outdoors (fall) | Jul 5 – Aug 21 |
| Spinach | Sow outdoors (spring) | Mar 30 – May 13 |
| Spinach | Sow outdoors (fall) | Jul 22 – Aug 26 |
| Radishes | Sow outdoors (spring) | Apr 6 – May 27 |
| Radishes | Sow outdoors (fall) | Jul 5 – Sep 5 |
| Kale | Sow outdoors (spring) | Apr 23 – May 13 |
| Kale | Sow outdoors (fall) | Jun 28 – Aug 5 |
| Carrots | Sow outdoors (spring) | May 7 – Jun 22 |
| Carrots | Sow outdoors (fall) | Jun 5 – Jul 21 |
| Garlic | Plant outdoors (fall) | Oct 5 – Nov 5 |
Where these dates come from
ZIP code 86054 is matched to the NOAA station Betatakin, AZ, 11.7 km away, at 7,286 ft elevation (738 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Betatakin, AZ (used) | 7,286 ft | May 7 | Oct 15 |
| Monument Valley, AZ | 5,501 ft | Apr 10 | Nov 1 |
| Tuba City, AZ | 4,988 ft | Apr 16 | Oct 28 |
| Page, AZ | 4,270 ft | Mar 27 | Nov 9 |
Frost dates near Shonto
- Tonalea, AZ 86044 · last Apr 10, first Nov 1
- Kayenta, AZ 86033 · last Apr 10, first Nov 1
- Monument Valley, UT 84536 · last Apr 10, first Nov 1
- Kaibeto, AZ 86053 · last Apr 16, first Oct 28
- Pinon, AZ 86510 · last May 16, first Oct 10
- Dennehotso, AZ 86535 · last Apr 10, first Nov 1
- Hotevilla, AZ 86030 · last May 16, first Oct 10
- Page, AZ 86040 · last Mar 7, first Nov 15
Frequently asked questions
- When is the last frost in Shonto, AZ?
- For ZIP code 86054, the average last spring frost (32°F) is May 7, based on NOAA 1991-2020 climate normals for the Betatakin, AZ weather station. There is a 1-in-10 chance of a frost after May 26.
- When is the first frost in Shonto, AZ?
- The average first fall frost (32°F) is October 15. 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 86054?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 159 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.