Frost dates for 59222Flaxville, MT
The average last spring frost in Flaxville is May 13 and the average first fall frost is September 28, giving a typical growing season of about 137 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 13
- Average first fall frost
- Sep 28
- Growing season
- 137 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 14 (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 11 · May 23 · Jun 3 | Sep 6 · Sep 21 · Oct 2 | 119 days | 100% |
| Frost / freeze (32°F) | Apr 30 · May 13 · May 25 | Sep 14 · Sep 28 · Oct 11 | 137 days | 100% |
| Hard freeze (28°F) | Apr 16 · May 2 · May 17 | Sep 22 · Oct 7 · Oct 22 | 157 days | 100% |
Planting calendar for Flaxville
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 8 |
| 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 18 |
| Summer squash | Sow outdoors | May 29 – Jul 13 |
| Winter squash & pumpkins | Sow outdoors | Jun 12 – Jul 13 |
| Snap beans | Sow outdoors | May 29 – Jul 11 |
| Sweet corn | Sow outdoors | May 29 – Jun 8 |
| 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 29 – Jun 8 |
| Broccoli | Transplant outdoors (fall) | Jun 28 – Jul 9 |
| Cabbage | Start seeds indoors (spring) | Mar 15 – Apr 12 |
| Cabbage | Transplant outdoors (spring) | Apr 12 – May 13 |
| Cabbage | Start seeds indoors (fall) | May 19 – Jun 18 |
| Cabbage | Transplant outdoors (fall) | Jun 18 – Jul 19 |
| Leaf lettuce | Sow outdoors (spring) | Apr 12 – Jun 28 |
| Leaf lettuce | Sow outdoors (fall) | Jun 18 – Aug 4 |
| Spinach | Sow outdoors (spring) | Apr 5 – May 19 |
| Spinach | Sow outdoors (fall) | Jul 5 – Aug 9 |
| Radishes | Sow outdoors (spring) | Apr 12 – Jun 2 |
| Radishes | Sow outdoors (fall) | Jun 18 – Aug 19 |
| Kale | Sow outdoors (spring) | Apr 29 – May 19 |
| Kale | Sow outdoors (fall) | Jun 11 – Jul 19 |
| Carrots | Sow outdoors (spring) | May 13 – Jun 28 |
| Carrots | Sow outdoors (fall) | May 19 – Jul 4 |
| Garlic | Plant outdoors (fall) | Sep 18 – Oct 19 |
Where these dates come from
ZIP code 59222 is matched to the NOAA station Wolf Point 34 Ne, MT, 29 km away, at 2,643 ft elevation (60 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Wolf Point 34 Ne, MT (used) | 2,643 ft | May 13 | Sep 28 |
| Redstone, MT | 2,106 ft | May 28 | Sep 7 |
| Scobey 4 Nw, MT | 2,390 ft | May 28 | Sep 6 |
| Bredette, MT | 2,313 ft | May 20 | Sep 21 |
Frost dates near Flaxville
- Whitetail, MT 59276 · last May 28, first Sep 6
- Redstone, MT 59257 · last May 28, first Sep 7
- Scobey, MT 59263 · last May 28, first Sep 6
- Outlook, MT 59252 · last May 19, first Sep 23
- Reserve, MT 59258 · last May 25, first Sep 14
- Plentywood, MT 59254 · last May 25, first Sep 14
- Raymond, MT 59256 · last May 19, first Sep 23
- Peerless, MT 59253 · last Jun 5, first Sep 2
Frequently asked questions
- When is the last frost in Flaxville, MT?
- For ZIP code 59222, the average last spring frost (32°F) is May 13, based on NOAA 1991-2020 climate normals for the Wolf Point 34 Ne, MT weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in Flaxville, MT?
- The average first fall frost (32°F) is September 28. There is a 1-in-10 chance of frost by September 14, so tender plants are at risk from that point on.
- How long is the growing season in 59222?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 137 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.