Frost dates for 57560Norris, SD
The average last spring frost in Norris is May 6 and the average first fall frost is October 4, giving a typical growing season of about 151 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 6
- Average first fall frost
- Oct 4
- Growing season
- 151 days
Safer after May 22 (1-in-10 risk)
Possible by Sep 22 (1-in-10 risk)
Last frost typically in 191 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 3 · May 17 · May 31 | Sep 14 · Sep 27 · Oct 8 | 134 days | 100% |
| Frost / freeze (32°F) | Apr 24 · May 6 · May 22 | Sep 22 · Oct 4 · Oct 19 | 151 days | 100% |
| Hard freeze (28°F) | Apr 13 · Apr 29 · May 12 | Sep 29 · Oct 14 · Oct 29 | 169 days | 100% |
Planting calendar for Norris
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 57560 is matched to the NOAA station Cedar Butte, SD, 16.3 km away, at 2,355 ft elevation (168 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Cedar Butte, SD (used) | 2,355 ft | May 6 | Oct 4 |
| Longvalley, SD | 2,470 ft | May 9 | Oct 1 |
| Harrington, SD | 2,980 ft | May 11 | Oct 1 |
| Mission, SD | 2,587 ft | May 9 | Oct 1 |
Frost dates near Norris
- Parmelee, SD 57566 · last May 9, first Oct 1
- Long Valley, SD 57547 · last May 9, first Oct 1
- White River, SD 57579 · last May 10, first Oct 1
- Rosebud, SD 57570 · last May 9, first Oct 1
- Saint Francis, SD 57572 · last May 10, first Sep 29
- Tuthill, SD 57574 · last May 11, first Oct 1
- Wanblee, SD 57577 · last May 9, first Oct 1
- Belvidere, SD 57521 · last May 11, first Sep 30
Frequently asked questions
- When is the last frost in Norris, SD?
- For ZIP code 57560, the average last spring frost (32°F) is May 6, based on NOAA 1991-2020 climate normals for the Cedar Butte, SD weather station. There is a 1-in-10 chance of a frost after May 22.
- When is the first frost in Norris, SD?
- The average first fall frost (32°F) is October 4. There is a 1-in-10 chance of frost by September 22, so tender plants are at risk from that point on.
- How long is the growing season in 57560?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 151 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.