Frost dates for 54531Hazelhurst, WI
The average last spring frost in Hazelhurst is May 23 and the average first fall frost is September 27, giving a typical growing season of about 127 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 23
- Average first fall frost
- Sep 27
- Growing season
- 127 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 9 (1-in-10 risk)
Last frost typically in 208 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 20 · Jun 1 · Jun 17 | Aug 29 · Sep 15 · Sep 30 | 103 days | 100% |
| Frost / freeze (32°F) | May 7 · May 23 · Jun 6 | Sep 9 · Sep 27 · Oct 10 | 127 days | 100% |
| Hard freeze (28°F) | Apr 27 · May 10 · May 25 | Sep 21 · Oct 6 · Oct 24 | 149 days | 100% |
Planting calendar for Hazelhurst
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 22 – Jun 28 |
| Tomatoes | Transplant outdoors | Jun 8 – Jun 7 |
| Peppers | Start seeds indoors | Apr 22 – May 23 |
| Peppers | Transplant outdoors | Jun 22 – Jul 23 |
| Eggplant | Start seeds indoors | May 9 – Jun 7 |
| Eggplant | Transplant outdoors | Jun 22 – Jul 23 |
| Cucumbers | Sow outdoors | Jun 22 – Jun 17 |
| Summer squash | Sow outdoors | Jun 8 – Jul 23 |
| Winter squash & pumpkins | Sow outdoors | Jun 22 – Jul 23 |
| Snap beans | Sow outdoors | Jun 8 – Jul 10 |
| Sweet corn | Sow outdoors | Jun 8 – Jun 7 |
| Watermelon & cantaloupe | Sow outdoors | Jun 22 – Jul 23 |
| Okra | Sow outdoors | Jun 15 – Jul 8 |
| Peas | Sow outdoors (spring) | Apr 22 – Jun 7 |
| Potatoes | Plant outdoors (spring) | Apr 22 – Jun 22 |
| Onions | Start seeds indoors (spring) | Mar 11 – Apr 7 |
| Onions | Transplant outdoors (spring) | May 9 – Jun 7 |
| Broccoli | Start seeds indoors (spring) | Apr 4 – May 8 |
| Broccoli | Transplant outdoors (spring) | May 9 – Jun 7 |
| Broccoli | Start seeds indoors (fall) | May 28 – Jun 7 |
| Broccoli | Transplant outdoors (fall) | Jun 27 – Jul 8 |
| Cabbage | Start seeds indoors (spring) | Mar 25 – Apr 22 |
| Cabbage | Transplant outdoors (spring) | Apr 22 – May 23 |
| Cabbage | Start seeds indoors (fall) | May 18 – Jun 17 |
| Cabbage | Transplant outdoors (fall) | Jun 17 – Jul 18 |
| Leaf lettuce | Sow outdoors (spring) | Apr 22 – Jul 8 |
| Leaf lettuce | Sow outdoors (fall) | Jun 17 – Aug 3 |
| Spinach | Sow outdoors (spring) | Apr 15 – May 29 |
| Spinach | Sow outdoors (fall) | Jul 4 – Aug 8 |
| Radishes | Sow outdoors (spring) | Apr 22 – Jun 12 |
| Radishes | Sow outdoors (fall) | Jun 17 – Aug 18 |
| Kale | Sow outdoors (spring) | May 9 – May 29 |
| Kale | Sow outdoors (fall) | Jun 10 – Jul 18 |
| Carrots | Sow outdoors (spring) | May 23 – Jul 8 |
| Carrots | Sow outdoors (fall) | May 18 – Jul 3 |
| Garlic | Plant outdoors (fall) | Sep 17 – Oct 18 |
Where these dates come from
ZIP code 54531 is matched to the NOAA station Minocqua, WI, 12.5 km away, at 1,601 ft elevation (79 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Minocqua, WI (used) | 1,601 ft | May 23 | Sep 27 |
| Willow Rsvr, WI | 1,532 ft | May 13 | Oct 3 |
| St Germain, WI | 1,643 ft | May 19 | Oct 3 |
| Rice Rsvr Tomahawk-2, WI | 1,460 ft | May 10 | Oct 4 |
Frost dates near Hazelhurst
- Minocqua, WI 54548 · last May 23, first Sep 27
- Lake Tomahawk, WI 54539 · last May 23, first Sep 27
- Harshaw, WI 54529 · last May 26, first Sep 23
- Mc Naughton, WI 54543 · last May 26, first Sep 23
- Woodruff, WI 54568 · last May 23, first Sep 27
- Lac Du Flambeau, WI 54538 · last May 23, first Sep 27
- Heafford Junction, WI 54532 · last May 10, first Oct 4
- Saint Germain, WI 54558 · last May 19, first Oct 3
Frequently asked questions
- When is the last frost in Hazelhurst, WI?
- For ZIP code 54531, the average last spring frost (32°F) is May 23, based on NOAA 1991-2020 climate normals for the Minocqua, WI weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Hazelhurst, WI?
- The average first fall frost (32°F) is September 27. There is a 1-in-10 chance of frost by September 9, so tender plants are at risk from that point on.
- How long is the growing season in 54531?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 127 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.