Frost dates for 68067Walthill, NE
The average last spring frost in Walthill is May 1 and the average first fall frost is October 6, giving a typical growing season of about 156 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 1
- Average first fall frost
- Oct 6
- Growing season
- 156 days
Safer after May 15 (1-in-10 risk)
Possible by Sep 20 (1-in-10 risk)
Last frost typically in 186 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 27 · May 8 · May 22 | Sep 13 · Sep 28 · Oct 10 | 140 days | 100% |
| Frost / freeze (32°F) | Apr 18 · May 1 · May 15 | Sep 20 · Oct 6 · Oct 19 | 156 days | 100% |
| Hard freeze (28°F) | Apr 6 · Apr 21 · May 5 | Sep 30 · Oct 16 · Oct 29 | 176 days | 100% |
Planting calendar for Walthill
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 31 – Jun 6 |
| Tomatoes | Transplant outdoors | May 17 – Jun 16 |
| Peppers | Start seeds indoors | Mar 31 – May 1 |
| Peppers | Transplant outdoors | May 31 – Jul 1 |
| Eggplant | Start seeds indoors | Apr 17 – May 16 |
| Eggplant | Transplant outdoors | May 31 – Jul 1 |
| Cucumbers | Sow outdoors | May 31 – Jun 26 |
| Summer squash | Sow outdoors | May 17 – Jul 1 |
| Winter squash & pumpkins | Sow outdoors | May 31 – Jul 1 |
| Snap beans | Sow outdoors | May 17 – Jul 19 |
| Sweet corn | Sow outdoors | May 17 – Jun 16 |
| Watermelon & cantaloupe | Sow outdoors | May 31 – Jul 1 |
| Okra | Sow outdoors | May 24 – Jun 16 |
| Peas | Sow outdoors (spring) | Mar 31 – May 16 |
| Potatoes | Plant outdoors (spring) | Mar 31 – May 31 |
| Onions | Start seeds indoors (spring) | Feb 17 – Mar 16 |
| Onions | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (spring) | Mar 13 – Apr 16 |
| Broccoli | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (fall) | Jun 6 – Jun 16 |
| Broccoli | Transplant outdoors (fall) | Jul 6 – Jul 17 |
| Cabbage | Start seeds indoors (spring) | Mar 3 – Mar 31 |
| Cabbage | Transplant outdoors (spring) | Mar 31 – May 1 |
| Cabbage | Start seeds indoors (fall) | May 27 – Jun 26 |
| Cabbage | Transplant outdoors (fall) | Jun 26 – Jul 27 |
| Leaf lettuce | Sow outdoors (spring) | Mar 31 – Jun 16 |
| Leaf lettuce | Sow outdoors (fall) | Jun 26 – Aug 12 |
| Spinach | Sow outdoors (spring) | Mar 24 – May 7 |
| Spinach | Sow outdoors (fall) | Jul 13 – Aug 17 |
| Radishes | Sow outdoors (spring) | Mar 31 – May 21 |
| Radishes | Sow outdoors (fall) | Jun 26 – Aug 27 |
| Kale | Sow outdoors (spring) | Apr 17 – May 7 |
| Kale | Sow outdoors (fall) | Jun 19 – Jul 27 |
| Carrots | Sow outdoors (spring) | May 1 – Jun 16 |
| Carrots | Sow outdoors (fall) | May 27 – Jul 12 |
| Garlic | Plant outdoors (fall) | Sep 26 – Oct 27 |
Where these dates come from
ZIP code 68067 is matched to the NOAA station Walthill 1E, NE, 0.5 km away, at 1,280 ft elevation (66 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Walthill 1E, NE (used) | 1,280 ft | May 1 | Oct 6 |
| Sioux City Gateway Ap, IA | 1,095 ft | Apr 29 | Oct 5 |
| Sioux City Ang, IA | 1,100 ft | Apr 29 | Oct 7 |
| Onawa 3Nw, IA | 1,060 ft | May 1 | Oct 3 |
Frost dates near Walthill
- Winnebago, NE 68071 · last May 1, first Oct 6
- Rosalie, NE 68055 · last May 1, first Oct 6
- Macy, NE 68039 · last May 1, first Oct 6
- Bancroft, NE 68004 · last May 1, first Oct 6
- Thurston, NE 68062 · last May 5, first Oct 1
- Pender, NE 68047 · last May 1, first Oct 6
- Homer, NE 68030 · last Apr 29, first Oct 5
- Lyons, NE 68038 · last Apr 28, first Oct 12
Frequently asked questions
- When is the last frost in Walthill, NE?
- For ZIP code 68067, the average last spring frost (32°F) is May 1, based on NOAA 1991-2020 climate normals for the Walthill 1E, NE weather station. There is a 1-in-10 chance of a frost after May 15.
- When is the first frost in Walthill, NE?
- The average first fall frost (32°F) is October 6. There is a 1-in-10 chance of frost by September 20, so tender plants are at risk from that point on.
- How long is the growing season in 68067?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 156 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.