Frost dates for 54978Tilleda, WI
The average last spring frost in Tilleda is May 13 and the average first fall frost is September 30, giving a typical growing season of about 141 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 13
- Average first fall frost
- Sep 30
- Growing season
- 141 days
Safer after May 26 (1-in-10 risk)
Possible by Sep 17 (1-in-10 risk)
Last frost typically in 198 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 25 · Jun 6 | Sep 9 · Sep 21 · Oct 3 | 118 days | 100% |
| Frost / freeze (32°F) | Apr 29 · May 13 · May 26 | Sep 17 · Sep 30 · Oct 14 | 141 days | 100% |
| Hard freeze (28°F) | Apr 20 · May 2 · May 16 | Sep 28 · Oct 12 · Oct 27 | 163 days | 100% |
Planting calendar for Tilleda
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 12 – Jun 18 |
| Tomatoes | Transplant outdoors | May 29 – Jun 10 |
| Peppers | Start seeds indoors | Apr 12 – May 13 |
| Peppers | Transplant outdoors | Jun 12 – Jul 13 |
| Eggplant | Start seeds indoors | Apr 29 – May 28 |
| Eggplant | Transplant outdoors | Jun 12 – Jul 13 |
| Cucumbers | Sow outdoors | Jun 12 – Jun 20 |
| Summer squash | Sow outdoors | May 29 – Jul 13 |
| Winter squash & pumpkins | Sow outdoors | Jun 12 – Jul 13 |
| Snap beans | Sow outdoors | May 29 – Jul 13 |
| Sweet corn | Sow outdoors | May 29 – Jun 10 |
| Watermelon & cantaloupe | Sow outdoors | Jun 12 – Jul 13 |
| Okra | Sow outdoors | Jun 5 – Jun 28 |
| Peas | Sow outdoors (spring) | Apr 12 – May 28 |
| Potatoes | Plant outdoors (spring) | Apr 12 – Jun 12 |
| Onions | Start seeds indoors (spring) | Mar 1 – Mar 28 |
| Onions | Transplant outdoors (spring) | Apr 29 – May 28 |
| Broccoli | Start seeds indoors (spring) | Mar 25 – Apr 28 |
| Broccoli | Transplant outdoors (spring) | Apr 29 – May 28 |
| Broccoli | Start seeds indoors (fall) | May 31 – Jun 10 |
| Broccoli | Transplant outdoors (fall) | Jun 30 – Jul 11 |
| Cabbage | Start seeds indoors (spring) | Mar 15 – Apr 12 |
| Cabbage | Transplant outdoors (spring) | Apr 12 – May 13 |
| Cabbage | Start seeds indoors (fall) | May 21 – Jun 20 |
| Cabbage | Transplant outdoors (fall) | Jun 20 – Jul 21 |
| Leaf lettuce | Sow outdoors (spring) | Apr 12 – Jun 28 |
| Leaf lettuce | Sow outdoors (fall) | Jun 20 – Aug 6 |
| Spinach | Sow outdoors (spring) | Apr 5 – May 19 |
| Spinach | Sow outdoors (fall) | Jul 7 – Aug 11 |
| Radishes | Sow outdoors (spring) | Apr 12 – Jun 2 |
| Radishes | Sow outdoors (fall) | Jun 20 – Aug 21 |
| Kale | Sow outdoors (spring) | Apr 29 – May 19 |
| Kale | Sow outdoors (fall) | Jun 13 – Jul 21 |
| Carrots | Sow outdoors (spring) | May 13 – Jun 28 |
| Carrots | Sow outdoors (fall) | May 21 – Jul 6 |
| Garlic | Plant outdoors (fall) | Sep 20 – Oct 21 |
Where these dates come from
ZIP code 54978 is matched to the NOAA station Stockbridge-Munsee Rsvn, WI, 8.2 km away, at 1,050 ft elevation (20 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Stockbridge-Munsee Rsvn, WI (used) | 1,050 ft | May 13 | Sep 30 |
| Shawano 2Ssw, WI | 806 ft | May 9 | Oct 2 |
| Clintonville, WI | 802 ft | May 4 | Oct 6 |
| Rosholt 9 Nne, WI | 1,183 ft | May 6 | Oct 5 |
Frost dates near Tilleda
- Leopolis, WI 54948 · last May 13, first Sep 30
- Caroline, WI 54928 · last May 13, first Sep 30
- Gresham, WI 54128 · last May 13, first Sep 30
- Marion, WI 54950 · last May 4, first Oct 6
- Tigerton, WI 54486 · last May 13, first Sep 30
- Bowler, WI 54416 · last May 13, first Sep 30
- Embarrass, WI 54933 · last May 4, first Oct 6
- Neopit, WI 54150 · last May 13, first Sep 30
Frequently asked questions
- When is the last frost in Tilleda, WI?
- For ZIP code 54978, the average last spring frost (32°F) is May 13, based on NOAA 1991-2020 climate normals for the Stockbridge-Munsee Rsvn, WI weather station. There is a 1-in-10 chance of a frost after May 26.
- When is the first frost in Tilleda, WI?
- The average first fall frost (32°F) is September 30. There is a 1-in-10 chance of frost by September 17, so tender plants are at risk from that point on.
- How long is the growing season in 54978?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 141 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.