Frost dates for 54409Antigo, WI
The average last spring frost in Antigo is May 14 and the average first fall frost is September 30, giving a typical growing season of about 139 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 14
- Average first fall frost
- Sep 30
- Growing season
- 139 days
Safer after May 28 (1-in-10 risk)
Possible by Sep 14 (1-in-10 risk)
Last frost typically in 199 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 12 · May 27 · Jun 9 | Sep 3 · Sep 20 · Oct 4 | 116 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 14 · May 28 | Sep 14 · Sep 30 · Oct 13 | 139 days | 100% |
| Hard freeze (28°F) | Apr 18 · May 1 · May 17 | Sep 24 · Oct 11 · Oct 26 | 161 days | 100% |
Planting calendar for Antigo
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 13 – Jun 19 |
| Tomatoes | Transplant outdoors | May 30 – Jun 10 |
| Peppers | Start seeds indoors | Apr 13 – May 14 |
| Peppers | Transplant outdoors | Jun 13 – Jul 14 |
| Eggplant | Start seeds indoors | Apr 30 – May 29 |
| Eggplant | Transplant outdoors | Jun 13 – Jul 14 |
| Cucumbers | Sow outdoors | Jun 13 – Jun 20 |
| Summer squash | Sow outdoors | May 30 – Jul 14 |
| Winter squash & pumpkins | Sow outdoors | Jun 13 – Jul 14 |
| Snap beans | Sow outdoors | May 30 – Jul 13 |
| Sweet corn | Sow outdoors | May 30 – Jun 10 |
| Watermelon & cantaloupe | Sow outdoors | Jun 13 – Jul 14 |
| Okra | Sow outdoors | Jun 6 – Jun 29 |
| Peas | Sow outdoors (spring) | Apr 13 – May 29 |
| Potatoes | Plant outdoors (spring) | Apr 13 – Jun 13 |
| Onions | Start seeds indoors (spring) | Mar 2 – Mar 29 |
| Onions | Transplant outdoors (spring) | Apr 30 – May 29 |
| Broccoli | Start seeds indoors (spring) | Mar 26 – Apr 29 |
| Broccoli | Transplant outdoors (spring) | Apr 30 – May 29 |
| Broccoli | Start seeds indoors (fall) | May 31 – Jun 10 |
| Broccoli | Transplant outdoors (fall) | Jun 30 – Jul 11 |
| Cabbage | Start seeds indoors (spring) | Mar 16 – Apr 13 |
| Cabbage | Transplant outdoors (spring) | Apr 13 – May 14 |
| Cabbage | Start seeds indoors (fall) | May 21 – Jun 20 |
| Cabbage | Transplant outdoors (fall) | Jun 20 – Jul 21 |
| Leaf lettuce | Sow outdoors (spring) | Apr 13 – Jun 29 |
| Leaf lettuce | Sow outdoors (fall) | Jun 20 – Aug 6 |
| Spinach | Sow outdoors (spring) | Apr 6 – May 20 |
| Spinach | Sow outdoors (fall) | Jul 7 – Aug 11 |
| Radishes | Sow outdoors (spring) | Apr 13 – Jun 3 |
| Radishes | Sow outdoors (fall) | Jun 20 – Aug 21 |
| Kale | Sow outdoors (spring) | Apr 30 – May 20 |
| Kale | Sow outdoors (fall) | Jun 13 – Jul 21 |
| Carrots | Sow outdoors (spring) | May 14 – Jun 29 |
| Carrots | Sow outdoors (fall) | May 21 – Jul 6 |
| Garlic | Plant outdoors (fall) | Sep 20 – Oct 21 |
Where these dates come from
ZIP code 54409 is matched to the NOAA station Antigo, WI, 4 km away, at 1,519 ft elevation (23 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Antigo, WI (used) | 1,519 ft | May 14 | Sep 30 |
| Stockbridge-Munsee Rsvn, WI | 1,050 ft | May 13 | Sep 30 |
| Merrill, WI | 1,250 ft | May 11 | Sep 30 |
| Rosholt 9 Nne, WI | 1,183 ft | May 6 | Oct 5 |
Frost dates near Antigo
- Deerbrook, WI 54424 · last May 14, first Sep 30
- Phlox, WI 54464 · last May 13, first Sep 30
- Bryant, WI 54418 · last May 14, first Sep 30
- Mattoon, WI 54450 · last May 13, first Sep 30
- Elton, WI 54430 · last May 14, first Sep 30
- Aniwa, WI 54408 · last May 6, first Oct 4
- Birnamwood, WI 54414 · last May 6, first Oct 5
- Bowler, WI 54416 · last May 13, first Sep 30
Frequently asked questions
- When is the last frost in Antigo, WI?
- For ZIP code 54409, the average last spring frost (32°F) is May 14, based on NOAA 1991-2020 climate normals for the Antigo, WI weather station. There is a 1-in-10 chance of a frost after May 28.
- When is the first frost in Antigo, WI?
- The average first fall frost (32°F) is September 30. There is a 1-in-10 chance of frost by September 14, so tender plants are at risk from that point on.
- How long is the growing season in 54409?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 139 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.