Frost dates for 82512Crowheart, WY
The average last spring frost in Crowheart is June 1 and the average first fall frost is September 14, giving a typical growing season of about 104 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 1
- Average first fall frost
- Sep 14
- Growing season
- 104 days
Safer after Jun 19 (1-in-10 risk)
Possible by Sep 1 (1-in-10 risk)
Last frost typically in 217 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) | Jun 4 · Jun 20 · Jul 8 | Aug 14 · Sep 1 · Sep 15 | 70 days | 100% |
| Frost / freeze (32°F) | May 17 · Jun 1 · Jun 19 | Sep 1 · Sep 14 · Sep 27 | 104 days | 100% |
| Hard freeze (28°F) | May 2 · May 15 · May 31 | Sep 12 · Sep 26 · Oct 10 | 132 days | 100% |
Planting calendar for Crowheart
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 | May 1 – Jul 7 |
| Tomatoes | Transplant outdoors | Jun 17 – May 25 |
| Peppers | Start seeds indoors | May 1 – Jun 1 |
| Peppers | Transplant outdoors | Jul 1 – Aug 1 |
| Eggplant | Start seeds indoors | May 18 – Jun 16 |
| Eggplant | Transplant outdoors | Jul 1 – Aug 1 |
| Cucumbers | Sow outdoors | Jul 1 – Jun 4 |
| Summer squash | Sow outdoors | Jun 17 – Aug 1 |
| Winter squash & pumpkins | Sow outdoors | Jul 1 – Aug 1 |
| Snap beans | Sow outdoors | Jun 17 – Jun 27 |
| Sweet corn | Sow outdoors | Jun 17 – May 25 |
| Watermelon & cantaloupe | Sow outdoors | Jul 1 – Aug 1 |
| Okra | Sow outdoors | Jun 24 – Jul 17 |
| Peas | Sow outdoors (spring) | May 1 – Jun 16 |
| Potatoes | Plant outdoors (spring) | May 1 – Jul 1 |
| Onions | Start seeds indoors (spring) | Mar 20 – Apr 16 |
| Onions | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (spring) | Apr 13 – May 17 |
| Broccoli | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (fall) | May 15 – May 25 |
| Broccoli | Transplant outdoors (fall) | Jun 14 – Jun 25 |
| Cabbage | Start seeds indoors (spring) | Apr 3 – May 1 |
| Cabbage | Transplant outdoors (spring) | May 1 – Jun 1 |
| Cabbage | Start seeds indoors (fall) | May 5 – Jun 4 |
| Cabbage | Transplant outdoors (fall) | Jun 4 – Jul 5 |
| Leaf lettuce | Sow outdoors (spring) | May 1 – Jul 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 4 – Jul 21 |
| Spinach | Sow outdoors (spring) | Apr 24 – Jun 7 |
| Spinach | Sow outdoors (fall) | Jun 21 – Jul 26 |
| Radishes | Sow outdoors (spring) | May 1 – Jun 21 |
| Radishes | Sow outdoors (fall) | Jun 4 – Aug 5 |
| Kale | Sow outdoors (spring) | May 18 – Jun 7 |
| Kale | Sow outdoors (fall) | May 28 – Jul 5 |
| Carrots | Sow outdoors (spring) | Jun 1 – Jul 17 |
| Carrots | Sow outdoors (fall) | May 5 – Jun 20 |
| Garlic | Plant outdoors (fall) | Sep 4 – Oct 5 |
Where these dates come from
ZIP code 82512 is matched to the NOAA station Burris, WY, 1.8 km away, at 6,125 ft elevation (155 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Burris, WY (used) | 6,125 ft | Jun 1 | Sep 14 |
| Dubois, WY | 6,955 ft | — | — |
| Diversion Dam, WY | 5,578 ft | May 21 | Sep 20 |
| Pavillion, WY | 5,480 ft | May 14 | Sep 30 |
Frost dates near Crowheart
- Kinnear, WY 82516 · last May 21, first Sep 20
- Dubois, WY 82513 · last —, first —
- Pavillion, WY 82523 · last May 14, first Sep 30
- Fort Washakie, WY 82514 · last May 18, first Sep 27
- Cora, WY 82925 · last —, first —
- Pinedale, WY 82941 · last —, first —
- Lander, WY 82520 · last May 12, first Sep 24
- Hudson, WY 82515 · last May 12, first Sep 24
Frequently asked questions
- When is the last frost in Crowheart, WY?
- For ZIP code 82512, the average last spring frost (32°F) is June 1, based on NOAA 1991-2020 climate normals for the Burris, WY weather station. There is a 1-in-10 chance of a frost after June 19.
- When is the first frost in Crowheart, WY?
- The average first fall frost (32°F) is September 14. There is a 1-in-10 chance of frost by September 1, so tender plants are at risk from that point on.
- How long is the growing season in 82512?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 104 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.