Frost dates for 86052North Rim, AZ
The average last spring frost in North Rim is June 3 and the average first fall frost is September 27, giving a typical growing season of about 113 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 3
- Average first fall frost
- Sep 27
- Growing season
- 113 days
Safer after Jun 19 (1-in-10 risk)
Possible by Sep 12 (1-in-10 risk)
Last frost typically in 219 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) | Jun 2 · Jun 16 · Jun 30 | Aug 28 · Sep 15 · Sep 26 | 87 days | 100% |
| Frost / freeze (32°F) | May 16 · Jun 3 · Jun 19 | Sep 12 · Sep 27 · Oct 10 | 113 days | 100% |
| Hard freeze (28°F) | Apr 30 · May 19 · Jun 5 | Sep 24 · Oct 6 · Oct 23 | 139 days | 100% |
Planting calendar for North Rim
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 | May 3 – Jul 9 |
| Tomatoes | Transplant outdoors | Jun 19 – Jun 7 |
| Peppers | Start seeds indoors | May 3 – Jun 3 |
| Peppers | Transplant outdoors | Jul 3 – Aug 3 |
| Eggplant | Start seeds indoors | May 20 – Jun 18 |
| Eggplant | Transplant outdoors | Jul 3 – Aug 3 |
| Cucumbers | Sow outdoors | Jul 3 – Jun 17 |
| Summer squash | Sow outdoors | Jun 19 – Aug 3 |
| Winter squash & pumpkins | Sow outdoors | Jul 3 – Aug 3 |
| Snap beans | Sow outdoors | Jun 19 – Jul 10 |
| Sweet corn | Sow outdoors | Jun 19 – Jun 7 |
| Watermelon & cantaloupe | Sow outdoors | Jul 3 – Aug 3 |
| Okra | Sow outdoors | Jun 26 – Jul 19 |
| Peas | Sow outdoors (spring) | May 3 – Jun 18 |
| Potatoes | Plant outdoors (spring) | May 3 – Jul 3 |
| Onions | Start seeds indoors (spring) | Mar 22 – Apr 18 |
| Onions | Transplant outdoors (spring) | May 20 – Jun 18 |
| Broccoli | Start seeds indoors (spring) | Apr 15 – May 19 |
| Broccoli | Transplant outdoors (spring) | May 20 – Jun 18 |
| Broccoli | Start seeds indoors (fall) | May 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Apr 5 – May 3 |
| Cabbage | Transplant outdoors (spring) | May 3 – Jun 3 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | May 3 – Jul 19 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 26 – Jun 9 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | May 3 – Jun 23 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 20 – Jun 9 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | Jun 3 – Jul 19 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 86052 is matched to the NOAA station Bright Angel Rs, AZ, 0.5 km away, at 8,000 ft elevation (304 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bright Angel Rs, AZ (used) | 8,000 ft | Jun 3 | Sep 27 |
| Phantom Rch, AZ | 2,530 ft | Feb 9 | Dec 5 |
| Grand Canyon Visitor Ctr, AZ | 7,083 ft | May 2 | Oct 27 |
| Grand Canyon Np 2, AZ | 6,785 ft | Jun 1 | Oct 3 |
Frost dates near North Rim
- Grand Canyon, AZ 86023 · last Jun 17, first Sep 24
- Cameron, AZ 86020 · last Apr 16, first Oct 28
- Supai, AZ 86435 · last Feb 9, first Dec 5
- Marble Canyon, AZ 86036 · last Jun 3, first Sep 27
- Gray Mountain, AZ 86016 · last Apr 7, first Nov 3
- Kaibeto, AZ 86053 · last Apr 16, first Oct 28
- Tuba City, AZ 86045 · last Apr 16, first Oct 28
- Williams, AZ 86046 · last May 9, first Oct 19
Frequently asked questions
- When is the last frost in North Rim, AZ?
- For ZIP code 86052, the average last spring frost (32°F) is June 3, based on NOAA 1991-2020 climate normals for the Bright Angel Rs, AZ weather station. There is a 1-in-10 chance of a frost after June 19.
- When is the first frost in North Rim, AZ?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 12, so tender plants are at risk from that point on.
- How long is the growing season in 86052?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 113 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.