Frost dates for 99674Sutton, AK
The average last spring frost in Sutton is June 1 and the average first fall frost is September 6, giving a typical growing season of about 98 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 1
- Average first fall frost
- Sep 6
- Growing season
- 98 days
Safer after Jun 13 (1-in-10 risk)
Possible by Aug 24 (1-in-10 risk)
Last frost typically in 217 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) | — | — | 66 days | 100% |
| Frost / freeze (32°F) | May 20 · Jun 1 · Jun 13 | Aug 24 · Sep 6 · Sep 20 | 98 days | 100% |
| Hard freeze (28°F) | May 3 · May 18 · May 31 | Sep 5 · Sep 21 · Oct 3 | 125 days | 100% |
Planting calendar for Sutton
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 1 – Jul 7 |
| Tomatoes | Transplant outdoors | Jun 17 – May 17 |
| Peppers | Start seeds indoors | May 1 – Jun 1 |
| Peppers | Transplant outdoors | Jul 1 – Aug 1 |
| Eggplant | Start seeds indoors | May 18 – Jun 16 |
| Eggplant | Transplant outdoors | Jul 1 – Aug 1 |
| Cucumbers | Sow outdoors | Jul 1 – May 27 |
| Summer squash | Sow outdoors | Jun 17 – Aug 1 |
| Winter squash & pumpkins | Sow outdoors | Jul 1 – Aug 1 |
| Snap beans | Sow outdoors | Jun 17 – Jun 19 |
| Sweet corn | Sow outdoors | Jun 17 – May 17 |
| Watermelon & cantaloupe | Sow outdoors | Jul 1 – Aug 1 |
| Okra | Sow outdoors | Jun 24 – Jul 17 |
| Peas | Sow outdoors (spring) | May 1 – Jun 16 |
| Potatoes | Plant outdoors (spring) | May 1 – Jul 1 |
| Onions | Start seeds indoors (spring) | Mar 20 – Apr 16 |
| Onions | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (spring) | Apr 13 – May 17 |
| Broccoli | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (fall) | May 7 – May 17 |
| Broccoli | Transplant outdoors (fall) | Jun 6 – Jun 17 |
| Cabbage | Start seeds indoors (spring) | Apr 3 – May 1 |
| Cabbage | Transplant outdoors (spring) | May 1 – Jun 1 |
| Cabbage | Start seeds indoors (fall) | Apr 27 – May 27 |
| Cabbage | Transplant outdoors (fall) | May 27 – Jun 27 |
| Leaf lettuce | Sow outdoors (spring) | May 1 – Jul 17 |
| Leaf lettuce | Sow outdoors (fall) | May 27 – Jul 13 |
| Spinach | Sow outdoors (spring) | Apr 24 – Jun 7 |
| Spinach | Sow outdoors (fall) | Jun 13 – Jul 18 |
| Radishes | Sow outdoors (spring) | May 1 – Jun 21 |
| Radishes | Sow outdoors (fall) | May 27 – Jul 28 |
| Kale | Sow outdoors (spring) | May 18 – Jun 7 |
| Kale | Sow outdoors (fall) | May 20 – Jun 27 |
| Carrots | Sow outdoors (spring) | Jun 1 – Jul 17 |
| Carrots | Sow outdoors (fall) | Apr 27 – Jun 12 |
| Garlic | Plant outdoors (fall) | Aug 27 – Sep 27 |
Where these dates come from
ZIP code 99674 is matched to the NOAA station Sutton 1 W, AK, 6.9 km away, at 550 ft elevation (15 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sutton 1 W, AK (used) | 550 ft | Jun 1 | Sep 6 |
| Lazy Mtn, AK | 733 ft | May 22 | Sep 16 |
| Palmer Muni Ap, AK | 230 ft | May 6 | Sep 25 |
| Palmer Job Corps, AK | 216 ft | Apr 24 | Oct 4 |
Frost dates near Sutton
- Palmer, AK 99645 · last May 22, first Sep 16
- Wasilla, AK 99654 · last May 16, first Sep 23
- Chugiak, AK 99567 · last May 21, first Sep 15
- Houston, AK 99694 · last May 29, first Sep 7
- Eagle River, AK 99577 · last May 9, first Sep 26
- Big Lake, AK 99652 · last May 29, first Sep 7
- Willow, AK 99688 · last May 29, first Sep 7
- Anchorage, AK 99519 · last May 18, first Sep 23
Frequently asked questions
- When is the last frost in Sutton, AK?
- For ZIP code 99674, the average last spring frost (32°F) is June 1, based on NOAA 1991-2020 climate normals for the Sutton 1 W, AK weather station. There is a 1-in-10 chance of a frost after June 13.
- When is the first frost in Sutton, AK?
- The average first fall frost (32°F) is September 6. There is a 1-in-10 chance of frost by August 24, so tender plants are at risk from that point on.
- How long is the growing season in 99674?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 98 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.