Frost dates for 99764Northway, AK
The average last spring frost in Northway is May 26 and the average first fall frost is September 1, giving a typical growing season of about 97 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 26
- Average first fall frost
- Sep 1
- Growing season
- 97 days
Safer after Jun 8 (1-in-10 risk)
Possible by Aug 18 (1-in-10 risk)
Last frost typically in 211 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 26 · Jun 9 · Jun 27 | Aug 8 · Aug 21 · Sep 2 | 73 days | 100% |
| Frost / freeze (32°F) | May 13 · May 26 · Jun 8 | Aug 18 · Sep 1 · Sep 13 | 97 days | 100% |
| Hard freeze (28°F) | May 2 · May 13 · May 29 | Sep 1 · Sep 13 · Sep 23 | 120 days | 100% |
Planting calendar for Northway
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 25 – Jul 1 |
| Tomatoes | Transplant outdoors | Jun 11 – May 12 |
| Peppers | Start seeds indoors | Apr 25 – May 26 |
| Peppers | Transplant outdoors | Jun 25 – Jul 26 |
| Eggplant | Start seeds indoors | May 12 – Jun 10 |
| Eggplant | Transplant outdoors | Jun 25 – Jul 26 |
| Cucumbers | Sow outdoors | Jun 25 – May 22 |
| Summer squash | Sow outdoors | Jun 11 – Jul 26 |
| Winter squash & pumpkins | Sow outdoors | Jun 25 – Jul 26 |
| Snap beans | Sow outdoors | Jun 11 – Jun 14 |
| Sweet corn | Sow outdoors | Jun 11 – May 12 |
| Watermelon & cantaloupe | Sow outdoors | Jun 25 – Jul 26 |
| Okra | Sow outdoors | Jun 18 – Jul 11 |
| Peas | Sow outdoors (spring) | Apr 25 – Jun 10 |
| Potatoes | Plant outdoors (spring) | Apr 25 – Jun 25 |
| Onions | Start seeds indoors (spring) | Mar 14 – Apr 10 |
| Onions | Transplant outdoors (spring) | May 12 – Jun 10 |
| Broccoli | Start seeds indoors (spring) | Apr 7 – May 11 |
| Broccoli | Transplant outdoors (spring) | May 12 – Jun 10 |
| Broccoli | Start seeds indoors (fall) | May 2 – May 12 |
| Broccoli | Transplant outdoors (fall) | Jun 1 – Jun 12 |
| Cabbage | Start seeds indoors (spring) | Mar 28 – Apr 25 |
| Cabbage | Transplant outdoors (spring) | Apr 25 – May 26 |
| Cabbage | Start seeds indoors (fall) | Apr 22 – May 22 |
| Cabbage | Transplant outdoors (fall) | May 22 – Jun 22 |
| Leaf lettuce | Sow outdoors (spring) | Apr 25 – Jul 11 |
| Leaf lettuce | Sow outdoors (fall) | May 22 – Jul 8 |
| Spinach | Sow outdoors (spring) | Apr 18 – Jun 1 |
| Spinach | Sow outdoors (fall) | Jun 8 – Jul 13 |
| Radishes | Sow outdoors (spring) | Apr 25 – Jun 15 |
| Radishes | Sow outdoors (fall) | May 22 – Jul 23 |
| Kale | Sow outdoors (spring) | May 12 – Jun 1 |
| Kale | Sow outdoors (fall) | May 15 – Jun 22 |
| Carrots | Sow outdoors (spring) | May 26 – Jul 11 |
| Carrots | Sow outdoors (fall) | Apr 22 – Jun 7 |
| Garlic | Plant outdoors (fall) | Aug 22 – Sep 22 |
Where these dates come from
ZIP code 99764 is matched to the NOAA station Northway Ap, AK, 0.4 km away, at 1,713 ft elevation (0 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Northway Ap, AK (used) | 1,713 ft | May 26 | Sep 1 |
| Tok 70 Se, AK | 2,000 ft | — | — |
| Port Alcan, AK | 1,892 ft | May 28 | Aug 29 |
| Tok #2, AK | 1,658 ft | Jun 3 | Aug 27 |
Frost dates near Northway
- Tok, AK 99780 · last —, first —
Frequently asked questions
- When is the last frost in Northway, AK?
- For ZIP code 99764, the average last spring frost (32°F) is May 26, based on NOAA 1991-2020 climate normals for the Northway Ap, AK weather station. There is a 1-in-10 chance of a frost after June 8.
- When is the first frost in Northway, AK?
- The average first fall frost (32°F) is September 1. There is a 1-in-10 chance of frost by August 18, so tender plants are at risk from that point on.
- How long is the growing season in 99764?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 97 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.