Frost dates for 53063Newton, WI
The average last spring frost in Newton is April 30 and the average first fall frost is October 20, giving a typical growing season of about 171 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 30
- Average first fall frost
- Oct 20
- Growing season
- 171 days
Safer after May 15 (1-in-10 risk)
Possible by Oct 3 (1-in-10 risk)
Last frost typically in 185 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) | Apr 28 · May 12 · May 31 | Sep 24 · Oct 7 · Oct 24 | 146 days | 100% |
| Frost / freeze (32°F) | Apr 14 · Apr 30 · May 15 | Oct 3 · Oct 20 · Nov 3 | 171 days | 100% |
| Hard freeze (28°F) | Apr 2 · Apr 16 · May 3 | Oct 17 · Nov 1 · Nov 13 | 197 days | 100% |
Planting calendar for Newton
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 | Mar 30 – Jun 5 |
| Tomatoes | Transplant outdoors | May 16 – Jun 30 |
| Peppers | Start seeds indoors | Mar 30 – Apr 30 |
| Peppers | Transplant outdoors | May 30 – Jun 30 |
| Eggplant | Start seeds indoors | Apr 16 – May 15 |
| Eggplant | Transplant outdoors | May 30 – Jun 30 |
| Cucumbers | Sow outdoors | May 30 – Jul 10 |
| Summer squash | Sow outdoors | May 16 – Jun 30 |
| Winter squash & pumpkins | Sow outdoors | May 30 – Jun 30 |
| Snap beans | Sow outdoors | May 16 – Aug 2 |
| Sweet corn | Sow outdoors | May 16 – Jun 30 |
| Watermelon & cantaloupe | Sow outdoors | May 30 – Jun 30 |
| Okra | Sow outdoors | May 23 – Jun 15 |
| Peas | Sow outdoors (spring) | Mar 30 – May 15 |
| Potatoes | Plant outdoors (spring) | Mar 30 – May 30 |
| Onions | Start seeds indoors (spring) | Feb 16 – Mar 15 |
| Onions | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (spring) | Mar 12 – Apr 15 |
| Broccoli | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (fall) | Jun 20 – Jun 30 |
| Broccoli | Transplant outdoors (fall) | Jul 20 – Jul 31 |
| Cabbage | Start seeds indoors (spring) | Mar 2 – Mar 30 |
| Cabbage | Transplant outdoors (spring) | Mar 30 – Apr 30 |
| Cabbage | Start seeds indoors (fall) | Jun 10 – Jul 10 |
| Cabbage | Transplant outdoors (fall) | Jul 10 – Aug 10 |
| Leaf lettuce | Sow outdoors (spring) | Mar 30 – Jun 15 |
| Leaf lettuce | Sow outdoors (fall) | Jul 10 – Aug 26 |
| Spinach | Sow outdoors (spring) | Mar 23 – May 6 |
| Spinach | Sow outdoors (fall) | Jul 27 – Aug 31 |
| Radishes | Sow outdoors (spring) | Mar 30 – May 20 |
| Radishes | Sow outdoors (fall) | Jul 10 – Sep 10 |
| Kale | Sow outdoors (spring) | Apr 16 – May 6 |
| Kale | Sow outdoors (fall) | Jul 3 – Aug 10 |
| Carrots | Sow outdoors (spring) | Apr 30 – Jun 15 |
| Carrots | Sow outdoors (fall) | Jun 10 – Jul 26 |
| Garlic | Plant outdoors (fall) | Oct 10 – Nov 10 |
Where these dates come from
ZIP code 53063 is matched to the NOAA station Manitowoc, WI, 15.6 km away, at 584 ft elevation (125 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Manitowoc, WI (used) | 584 ft | Apr 30 | Oct 20 |
| Sheboygan Co Mem Ap, WI | 746 ft | May 5 | Oct 8 |
| Two Rivers, WI | 589 ft | Apr 27 | Oct 21 |
| Sheboygan, WI | 648 ft | Apr 25 | Oct 23 |
Frost dates near Newton
- Cleveland, WI 53015 · last May 5, first Oct 8
- Valders, WI 54245 · last May 1, first Oct 14
- Saint Nazianz, WI 54232 · last May 1, first Oct 14
- Manitowoc, WI 54220 · last Apr 30, first Oct 20
- Kiel, WI 53042 · last May 1, first Oct 14
- Sheboygan, WI 53083 · last Apr 25, first Oct 23
- Whitelaw, WI 54247 · last May 6, first Oct 6
- Collins, WI 54207 · last May 6, first Oct 6
Frequently asked questions
- When is the last frost in Newton, WI?
- For ZIP code 53063, the average last spring frost (32°F) is April 30, based on NOAA 1991-2020 climate normals for the Manitowoc, WI weather station. There is a 1-in-10 chance of a frost after May 15.
- When is the first frost in Newton, WI?
- The average first fall frost (32°F) is October 20. There is a 1-in-10 chance of frost by October 3, so tender plants are at risk from that point on.
- How long is the growing season in 53063?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 171 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.