Frost dates for 85360Wikieup, AZ
The average last spring frost in Wikieup is March 19 and the average first fall frost is November 23, giving a typical growing season of about 246 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 19
- Average first fall frost
- Nov 23
- Growing season
- 246 days
Safer after Apr 22 (1-in-10 risk)
Possible by Nov 4 (1-in-10 risk)
First frost typically in 27 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) | Mar 18 · Apr 12 · May 6 | Oct 26 · Nov 11 · Nov 25 | 210 days | 100% |
| Frost / freeze (32°F) | Feb 23 · Mar 19 · Apr 22 | Nov 4 · Nov 23 · Dec 7 | 246 days | 100% |
| Hard freeze (28°F) | Jan 20 · Feb 22 · Mar 15 | Nov 17 · Dec 5 · Dec 24 | 287 days | 100% |
Planting calendar for Wikieup
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 | Feb 16 – Apr 24 |
| Tomatoes | Transplant outdoors | Apr 4 – Aug 3 |
| Peppers | Start seeds indoors | Feb 16 – Mar 19 |
| Peppers | Transplant outdoors | Apr 18 – May 19 |
| Eggplant | Start seeds indoors | Mar 5 – Apr 3 |
| Eggplant | Transplant outdoors | Apr 18 – May 19 |
| Cucumbers | Sow outdoors | Apr 18 – Aug 13 |
| Summer squash | Sow outdoors | Apr 4 – May 19 |
| Winter squash & pumpkins | Sow outdoors | Apr 18 – May 19 |
| Snap beans | Sow outdoors | Apr 4 – Sep 5 |
| Sweet corn | Sow outdoors | Apr 4 – Aug 3 |
| Watermelon & cantaloupe | Sow outdoors | Apr 18 – May 19 |
| Okra | Sow outdoors | Apr 11 – May 4 |
| Peas | Sow outdoors (spring) | Feb 16 – Apr 3 |
| Potatoes | Plant outdoors (spring) | Feb 16 – Apr 18 |
| Onions | Start seeds indoors (spring) | Jan 5 – Feb 1 |
| Onions | Transplant outdoors (spring) | Mar 5 – Apr 3 |
| Broccoli | Start seeds indoors (spring) | Jan 29 – Mar 4 |
| Broccoli | Transplant outdoors (spring) | Mar 5 – Apr 3 |
| Broccoli | Start seeds indoors (fall) | Jul 24 – Aug 3 |
| Broccoli | Transplant outdoors (fall) | Aug 23 – Sep 3 |
| Cabbage | Start seeds indoors (spring) | Jan 19 – Feb 16 |
| Cabbage | Transplant outdoors (spring) | Feb 16 – Mar 19 |
| Cabbage | Start seeds indoors (fall) | Jul 14 – Aug 13 |
| Cabbage | Transplant outdoors (fall) | Aug 13 – Sep 13 |
| Leaf lettuce | Sow outdoors (spring) | Feb 16 – May 4 |
| Leaf lettuce | Sow outdoors (fall) | Aug 13 – Sep 29 |
| Spinach | Sow outdoors (spring) | Feb 9 – Mar 25 |
| Spinach | Sow outdoors (fall) | Aug 30 – Oct 4 |
| Radishes | Sow outdoors (spring) | Feb 16 – Apr 8 |
| Radishes | Sow outdoors (fall) | Aug 13 – Oct 14 |
| Kale | Sow outdoors (spring) | Mar 5 – Mar 25 |
| Kale | Sow outdoors (fall) | Aug 6 – Sep 13 |
| Carrots | Sow outdoors (spring) | Mar 19 – May 4 |
| Carrots | Sow outdoors (fall) | Jul 14 – Aug 29 |
| Garlic | Plant outdoors (fall) | Nov 13 – Dec 14 |
Where these dates come from
ZIP code 85360 is matched to the NOAA station Wikieup, AZ, 0.3 km away, at 2,010 ft elevation (22 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Wikieup, AZ (used) | 2,010 ft | Mar 19 | Nov 23 |
| Bagdad, AZ | 3,935 ft | Apr 7 | Nov 12 |
| Yucca 1 Nne, AZ | 1,950 ft | Feb 18 | Dec 2 |
| Alamo Dam, AZ | 1,290 ft | Mar 4 | Nov 23 |
Frost dates near Wikieup
- Bagdad, AZ 86321 · last Apr 7, first Nov 12
- Kingman, AZ 86401 · last Apr 2, first Nov 11
- Yucca, AZ 86438 · last Feb 18, first Dec 2
- Lake Havasu City, AZ 86406 · last Feb 18, first Dec 2
- Prescott, AZ 86305 · last May 24, first Oct 7
- Parker Dam, CA 92267 · last Jan 7, first Dec 31
- Kirkland, AZ 86332 · last Apr 7, first Nov 12
- Hackberry, AZ 86411 · last Apr 2, first Nov 11
Frequently asked questions
- When is the last frost in Wikieup, AZ?
- For ZIP code 85360, the average last spring frost (32°F) is March 19, based on NOAA 1991-2020 climate normals for the Wikieup, AZ weather station. There is a 1-in-10 chance of a frost after April 22.
- When is the first frost in Wikieup, AZ?
- The average first fall frost (32°F) is November 23. There is a 1-in-10 chance of frost by November 4, so tender plants are at risk from that point on.
- How long is the growing season in 85360?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 246 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.