Frost dates for 54024Saint Croix Falls, WI
The average last spring frost in Saint Croix Falls is May 6 and the average first fall frost is October 4, giving a typical growing season of about 149 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 6
- Average first fall frost
- Oct 4
- Growing season
- 149 days
Safer after May 20 (1-in-10 risk)
Possible by Sep 19 (1-in-10 risk)
Last frost typically in 187 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 1 · May 17 · Jun 1 | Sep 9 · Sep 24 · Oct 7 | 129 days | 100% |
| Frost / freeze (32°F) | Apr 23 · May 6 · May 20 | Sep 19 · Oct 4 · Oct 18 | 149 days | 100% |
| Hard freeze (28°F) | Apr 13 · Apr 27 · May 11 | Sep 29 · Oct 16 · Oct 31 | 171 days | 100% |
Planting calendar for Saint Croix Falls
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 5 – Jun 11 |
| Tomatoes | Transplant outdoors | May 22 – Jun 14 |
| Peppers | Start seeds indoors | Apr 5 – May 6 |
| Peppers | Transplant outdoors | Jun 5 – Jul 6 |
| Eggplant | Start seeds indoors | Apr 22 – May 21 |
| Eggplant | Transplant outdoors | Jun 5 – Jul 6 |
| Cucumbers | Sow outdoors | Jun 5 – Jun 24 |
| Summer squash | Sow outdoors | May 22 – Jul 6 |
| Winter squash & pumpkins | Sow outdoors | Jun 5 – Jul 6 |
| Snap beans | Sow outdoors | May 22 – Jul 17 |
| Sweet corn | Sow outdoors | May 22 – Jun 14 |
| Watermelon & cantaloupe | Sow outdoors | Jun 5 – Jul 6 |
| Okra | Sow outdoors | May 29 – Jun 21 |
| Peas | Sow outdoors (spring) | Apr 5 – May 21 |
| Potatoes | Plant outdoors (spring) | Apr 5 – Jun 5 |
| Onions | Start seeds indoors (spring) | Feb 22 – Mar 21 |
| Onions | Transplant outdoors (spring) | Apr 22 – May 21 |
| Broccoli | Start seeds indoors (spring) | Mar 18 – Apr 21 |
| Broccoli | Transplant outdoors (spring) | Apr 22 – May 21 |
| Broccoli | Start seeds indoors (fall) | Jun 4 – Jun 14 |
| Broccoli | Transplant outdoors (fall) | Jul 4 – Jul 15 |
| Cabbage | Start seeds indoors (spring) | Mar 8 – Apr 5 |
| Cabbage | Transplant outdoors (spring) | Apr 5 – May 6 |
| Cabbage | Start seeds indoors (fall) | May 25 – Jun 24 |
| Cabbage | Transplant outdoors (fall) | Jun 24 – Jul 25 |
| Leaf lettuce | Sow outdoors (spring) | Apr 5 – Jun 21 |
| Leaf lettuce | Sow outdoors (fall) | Jun 24 – Aug 10 |
| Spinach | Sow outdoors (spring) | Mar 29 – May 12 |
| Spinach | Sow outdoors (fall) | Jul 11 – Aug 15 |
| Radishes | Sow outdoors (spring) | Apr 5 – May 26 |
| Radishes | Sow outdoors (fall) | Jun 24 – Aug 25 |
| Kale | Sow outdoors (spring) | Apr 22 – May 12 |
| Kale | Sow outdoors (fall) | Jun 17 – Jul 25 |
| Carrots | Sow outdoors (spring) | May 6 – Jun 21 |
| Carrots | Sow outdoors (fall) | May 25 – Jul 10 |
| Garlic | Plant outdoors (fall) | Sep 24 – Oct 25 |
Where these dates come from
ZIP code 54024 is matched to the NOAA station Luck, WI, 12.1 km away, at 1,220 ft elevation (52 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Luck, WI (used) | 1,220 ft | May 6 | Oct 4 |
| Wild Rvr Sp, MN | 840 ft | May 19 | Sep 25 |
| St Croix Falls, WI | 750 ft | May 4 | Oct 8 |
| Grantsburg, WI | 990 ft | May 11 | Oct 1 |
Frost dates near Saint Croix Falls
- Cushing, WI 54006 · last May 19, first Sep 25
- Centuria, WI 54824 · last May 6, first Oct 4
- Milltown, WI 54858 · last May 6, first Oct 4
- Taylors Falls, MN 55084 · last May 19, first Sep 25
- Center City, MN 55012 · last May 19, first Sep 25
- Luck, WI 54853 · last May 6, first Oct 4
- Balsam Lake, WI 54810 · last May 6, first Oct 4
- Dresser, WI 54009 · last May 5, first Oct 4
Frequently asked questions
- When is the last frost in Saint Croix Falls, WI?
- For ZIP code 54024, the average last spring frost (32°F) is May 6, based on NOAA 1991-2020 climate normals for the Luck, WI weather station. There is a 1-in-10 chance of a frost after May 20.
- When is the first frost in Saint Croix Falls, WI?
- The average first fall frost (32°F) is October 4. There is a 1-in-10 chance of frost by September 19, so tender plants are at risk from that point on.
- How long is the growing season in 54024?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 149 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.