Frost dates for 58381Warwick, ND
The average last spring frost in Warwick is May 6 and the average first fall frost is October 5, giving a typical growing season of about 152 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 6
- Average first fall frost
- Oct 5
- Growing season
- 152 days
Safer after May 19 (1-in-10 risk)
Possible by Sep 26 (1-in-10 risk)
Last frost typically in 192 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 15 · May 28 | Sep 18 · Sep 28 · Oct 8 | 135 days | 100% |
| Frost / freeze (32°F) | Apr 23 · May 6 · May 19 | Sep 26 · Oct 5 · Oct 18 | 152 days | 100% |
| Hard freeze (28°F) | Apr 13 · Apr 27 · May 10 | Oct 3 · Oct 14 · Oct 26 | 170 days | 100% |
Planting calendar for Warwick
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 15 |
| 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 25 |
| Summer squash | Sow outdoors | May 22 – Jul 6 |
| Winter squash & pumpkins | Sow outdoors | Jun 5 – Jul 6 |
| Snap beans | Sow outdoors | May 22 – Jul 18 |
| Sweet corn | Sow outdoors | May 22 – Jun 15 |
| 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 5 – Jun 15 |
| Broccoli | Transplant outdoors (fall) | Jul 5 – Jul 16 |
| Cabbage | Start seeds indoors (spring) | Mar 8 – Apr 5 |
| Cabbage | Transplant outdoors (spring) | Apr 5 – May 6 |
| Cabbage | Start seeds indoors (fall) | May 26 – Jun 25 |
| Cabbage | Transplant outdoors (fall) | Jun 25 – Jul 26 |
| Leaf lettuce | Sow outdoors (spring) | Apr 5 – Jun 21 |
| Leaf lettuce | Sow outdoors (fall) | Jun 25 – Aug 11 |
| Spinach | Sow outdoors (spring) | Mar 29 – May 12 |
| Spinach | Sow outdoors (fall) | Jul 12 – Aug 16 |
| Radishes | Sow outdoors (spring) | Apr 5 – May 26 |
| Radishes | Sow outdoors (fall) | Jun 25 – Aug 26 |
| Kale | Sow outdoors (spring) | Apr 22 – May 12 |
| Kale | Sow outdoors (fall) | Jun 18 – Jul 26 |
| Carrots | Sow outdoors (spring) | May 6 – Jun 21 |
| Carrots | Sow outdoors (fall) | May 26 – Jul 11 |
| Garlic | Plant outdoors (fall) | Sep 25 – Oct 26 |
Where these dates come from
ZIP code 58381 is matched to the NOAA station Devils Lake Kdlr, ND, 27.7 km away, at 1,464 ft elevation (1 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Devils Lake Kdlr, ND (used) | 1,464 ft | May 6 | Oct 5 |
| Devils Lake, ND | 1,440 ft | May 12 | Sep 30 |
| Mc Henry 3W, ND | 1,555 ft | May 12 | Sep 28 |
| Minnewaukan, ND | 1,470 ft | May 12 | Sep 29 |
Frost dates near Warwick
- Tokio, ND 58379 · last May 6, first Oct 5
- Saint Michael, ND 58370 · last May 6, first Oct 5
- Tolna, ND 58380 · last May 12, first Sep 28
- Crary, ND 58327 · last May 6, first Oct 5
- New Rockford, ND 58356 · last May 12, first Sep 28
- Fort Totten, ND 58335 · last May 6, first Oct 5
- Lakota, ND 58344 · last May 11, first Sep 28
- Devils Lake, ND 58301 · last May 6, first Oct 5
Frequently asked questions
- When is the last frost in Warwick, ND?
- For ZIP code 58381, the average last spring frost (32°F) is May 6, based on NOAA 1991-2020 climate normals for the Devils Lake Kdlr, ND weather station. There is a 1-in-10 chance of a frost after May 19.
- When is the first frost in Warwick, ND?
- The average first fall frost (32°F) is October 5. There is a 1-in-10 chance of frost by September 26, so tender plants are at risk from that point on.
- How long is the growing season in 58381?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 152 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.